- info on using the Hayes ESP serial driver.
highuid.txt
- notes on the change from 16 bit to 32 bit user/group IDs.
-hpet.txt
- - High Precision Event Timer Driver for Linux.
timers/
- info on the timer related topics
hw_random.txt
--- /dev/null
+00-INDEX
+ - this file
+highres.txt
+ - High resolution timers and dynamic ticks design notes
+hpet.txt
+ - High Precision Event Timer Driver for Linux
+hrtimers.txt
+ - subsystem for high-resolution kernel timers
+timer_stats.txt
+ - timer usage statistics
High Precision Event Timer Driver for Linux
-The High Precision Event Timer (HPET) hardware is the future replacement
-for the 8254 and Real Time Clock (RTC) periodic timer functionality.
-Each HPET can have up to 32 timers. It is possible to configure the
-first two timers as legacy replacements for 8254 and RTC periodic timers.
-A specification done by Intel and Microsoft can be found at
-<http://www.intel.com/technology/architecture/hpetspec.htm>.
+The High Precision Event Timer (HPET) hardware follows a specification
+by Intel and Microsoft which can be found at
+
+ http://www.intel.com/technology/architecture/hpetspec.htm
+
+Each HPET has one fixed-rate counter (at 10+ MHz, hence "High Precision")
+and up to 32 comparators. Normally three or more comparators are provided,
+each of which can generate oneshot interupts and at least one of which has
+additional hardware to support periodic interrupts. The comparators are
+also called "timers", which can be misleading since usually timers are
+independent of each other ... these share a counter, complicating resets.
+
+HPET devices can support two interrupt routing modes. In one mode, the
+comparators are additional interrupt sources with no particular system
+role. Many x86 BIOS writers don't route HPET interrupts at all, which
+prevents use of that mode. They support the other "legacy replacement"
+mode where the first two comparators block interrupts from 8254 timers
+and from the RTC.
The driver supports detection of HPET driver allocation and initialization
of the HPET before the driver module_init routine is called. This enables
platform code which uses timer 0 or 1 as the main timer to intercept HPET
initialization. An example of this initialization can be found in
-arch/i386/kernel/time_hpet.c.
+arch/x86/kernel/hpet.c.
-The driver provides two APIs which are very similar to the API found in
-the rtc.c driver. There is a user space API and a kernel space API.
-An example user space program is provided below.
+The driver provides a userspace API which resembles the API found in the
+RTC driver framework. An example user space program is provided below.
#include <stdio.h>
#include <stdlib.h>
return;
}
-
-The kernel API has three interfaces exported from the driver:
-
- hpet_register(struct hpet_task *tp, int periodic)
- hpet_unregister(struct hpet_task *tp)
- hpet_control(struct hpet_task *tp, unsigned int cmd, unsigned long arg)
-
-The kernel module using this interface fills in the ht_func and ht_data
-members of the hpet_task structure before calling hpet_register.
-hpet_control simply vectors to the hpet_ioctl routine and has the same
-commands and respective arguments as the user API. hpet_unregister
-is used to terminate usage of the HPET timer reserved by hpet_register.
- "Crusoe" for the Transmeta Crusoe series.
- "Efficeon" for the Transmeta Efficeon series.
- "Winchip-C6" for original IDT Winchip.
- - "Winchip-2" for IDT Winchip 2.
- - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
+ - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
- "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
- "Geode GX/LX" For AMD Geode GX and LX processors.
- "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
treat this chip as a 586TSC with some extended instructions
and alignment requirements.
-config MWINCHIP2
- bool "Winchip-2"
- depends on X86_32
- help
- Select this for an IDT Winchip-2. Linux and GCC
- treat this chip as a 586TSC with some extended instructions
- and alignment requirements.
-
config MWINCHIP3D
- bool "Winchip-2A/Winchip-3"
+ bool "Winchip-2/Winchip-2A/Winchip-3"
depends on X86_32
help
- Select this for an IDT Winchip-2A or 3. Linux and GCC
+ Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
treat this chip as a 586TSC with some extended instructions
and alignment requirements. Also enable out of order memory
stores for this CPU, which can increase performance of some
int
default "7" if MPENTIUM4 || X86_GENERIC || GENERIC_CPU || MPSC
default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
- default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+ default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7
config X86_XADD
config X86_ALIGNMENT_16
def_bool y
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
config X86_INTEL_USERCOPY
def_bool y
config X86_USE_PPRO_CHECKSUM
def_bool y
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
config X86_USE_3DNOW
def_bool y
config X86_OOSTORE
def_bool y
- depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
+ depends on (MWINCHIP3D || MWINCHIPC6) && MTRR
#
# P6_NOPs are a relatively minor optimization that require a family >=
config X86_TSC
def_bool y
- depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
+ depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
config X86_CMPXCHG64
def_bool y
# generates cmov.
config X86_CMOV
def_bool y
- depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || X86_64)
+ depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64)
config X86_MINIMUM_CPU_FAMILY
int
config X86_DEBUGCTLMSR
def_bool y
- depends on !(MK6 || MWINCHIPC6 || MWINCHIP2 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
+ depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
menuconfig PROCESSOR_SELECT
bool "Supported processor vendors" if EMBEDDED
cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
-cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
.endm
/* clobbers %eax */
- .macro CLEAR_RREGS
+ .macro CLEAR_RREGS _r9=rax
xorl %eax,%eax
movq %rax,R11(%rsp)
movq %rax,R10(%rsp)
- movq %rax,R9(%rsp)
+ movq %\_r9,R9(%rsp)
movq %rax,R8(%rsp)
.endm
* We don't reload %eax because syscall_trace_enter() returned
* the value it wants us to use in the table lookup.
*/
- .macro LOAD_ARGS32 offset
- movl \offset(%rsp),%r11d
- movl \offset+8(%rsp),%r10d
+ .macro LOAD_ARGS32 offset, _r9=0
+ .if \_r9
movl \offset+16(%rsp),%r9d
- movl \offset+24(%rsp),%r8d
+ .endif
movl \offset+40(%rsp),%ecx
movl \offset+48(%rsp),%edx
movl \offset+56(%rsp),%esi
SAVE_ARGS 0,0,1
/* no need to do an access_ok check here because rbp has been
32bit zero extended */
-1: movl (%rbp),%r9d
+1: movl (%rbp),%ebp
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
cmpl $(IA32_NR_syscalls-1),%eax
ja ia32_badsys
sysenter_do_call:
- IA32_ARG_FIXUP 1
+ IA32_ARG_FIXUP
sysenter_dispatch:
call *ia32_sys_call_table(,%rax,8)
movq %rax,RAX-ARGOFFSET(%rsp)
#endif
sysenter_tracesys:
- xchgl %r9d,%ebp
#ifdef CONFIG_AUDITSYSCALL
testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
jz sysenter_auditsys
#endif
SAVE_REST
CLEAR_RREGS
- movq %r9,R9(%rsp)
movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
- xchgl %ebp,%r9d
cmpl $(IA32_NR_syscalls-1),%eax
ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
jmp sysenter_do_call
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
CFI_REMEMBER_STATE
jnz cstar_tracesys
-cstar_do_call:
cmpl $IA32_NR_syscalls-1,%eax
ja ia32_badsys
+cstar_do_call:
IA32_ARG_FIXUP 1
cstar_dispatch:
call *ia32_sys_call_table(,%rax,8)
#endif
xchgl %r9d,%ebp
SAVE_REST
- CLEAR_RREGS
- movq %r9,R9(%rsp)
+ CLEAR_RREGS r9
movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
- LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */
RESTORE_REST
xchgl %ebp,%r9d
- movl RSP-ARGOFFSET(%rsp), %r8d
cmpl $(IA32_NR_syscalls-1),%eax
ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
jmp cstar_do_call
CFLAGS_tsc.o := $(nostackp)
obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
-obj-y += traps_$(BITS).o irq_$(BITS).o
+obj-y += traps.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o
obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
obj-$(CONFIG_X86_VISWS) += visws_quirks.o
_text, _etext);
/* Only switch to UP mode if we don't immediately boot others */
- if (num_possible_cpus() == 1 || setup_max_cpus <= 1)
+ if (num_present_cpus() == 1 || setup_max_cpus <= 1)
alternatives_smp_switch(0);
}
#endif
{
u32 f1, f2;
- asm("pushfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "movl %0,%1\n\t"
- "xorl %2,%0\n\t"
- "pushl %0\n\t"
- "popfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "popfl\n\t"
- : "=&r" (f1), "=&r" (f2)
- : "ir" (flag));
+ /*
+ * Cyrix and IDT cpus allow disabling of CPUID
+ * so the code below may return different results
+ * when it is executed before and after enabling
+ * the CPUID. Add "volatile" to not allow gcc to
+ * optimize the subsequent calls to this function.
+ */
+ asm volatile ("pushfl\n\t"
+ "pushfl\n\t"
+ "popl %0\n\t"
+ "movl %0,%1\n\t"
+ "xorl %2,%0\n\t"
+ "pushl %0\n\t"
+ "popfl\n\t"
+ "pushfl\n\t"
+ "popl %0\n\t"
+ "popfl\n\t"
+ : "=&r" (f1), "=&r" (f2)
+ : "ir" (flag));
return ((f1^f2) & flag) != 0;
}
#endif
}
+#ifdef CONFIG_X86_64
+static void vgetcpu_set_mode(void)
+{
+ if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
+ vgetcpu_mode = VGETCPU_RDTSCP;
+ else
+ vgetcpu_mode = VGETCPU_LSL;
+}
+#endif
+
void __init identify_boot_cpu(void)
{
identify_cpu(&boot_cpu_data);
#ifdef CONFIG_X86_32
sysenter_setup();
enable_sep_cpu();
+#else
+ vgetcpu_set_mode();
#endif
}
else if (c->cpuid_level >= 0)
vendor = c->x86_vendor_id;
- if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor)))
+ if (vendor && !strstr(c->x86_model_id, vendor))
printk(KERN_CONT "%s ", vendor);
if (c->x86_model_id[0])
.ds = __USER_DS,
.fs = __KERNEL_PERCPU,
- .__cr3 = __phys_addr_const((unsigned long)swapper_pg_dir)
+ .__cr3 = __pa_nodebug(swapper_pg_dir),
}
};
--- /dev/null
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+#define STACKSLOTS_PER_LINE 8
+#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+ printk(" [<%p>] %s%pS\n", (void *) address,
+ reliable ? "" : "? ", (void *) address);
+}
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+ void *p, unsigned int size, void *end)
+{
+ void *t = tinfo;
+ if (end) {
+ if (p < end && p >= (end-THREAD_SIZE))
+ return 1;
+ else
+ return 0;
+ }
+ return p > t && p < t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data,
+ unsigned long *end)
+{
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
+ unsigned long addr;
+
+ addr = *stack;
+ if (__kernel_text_address(addr)) {
+ if ((unsigned long) stack == bp + sizeof(long)) {
+ ops->address(data, addr, 1);
+ frame = frame->next_frame;
+ bp = (unsigned long) frame;
+ } else {
+ ops->address(data, addr, bp == 0);
+ }
+ }
+ stack++;
+ }
+ return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ if (!task)
+ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (task && task != current)
+ stack = (unsigned long *)task->thread.sp;
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+ get_bp(bp);
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+#endif
+
+ for (;;) {
+ struct thread_info *context;
+
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+ bp = print_context_stack(context, stack, bp, ops, data, NULL);
+
+ stack = (unsigned long *)context->previous_esp;
+ if (!stack)
+ break;
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+ touch_nmi_watchdog();
+ }
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ printk(data);
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+ printk("%s%s\n", (char *)data, msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+ printk("%s <%s> ", (char *)data, name);
+ return 0;
+}
+
+/*
+ * Print one address/symbol entries per line.
+ */
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ touch_nmi_watchdog();
+ printk(data);
+ printk_address(addr, reliable);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+ printk("%sCall Trace:\n", log_lvl);
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp)
+{
+ show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+ unsigned long *stack;
+ int i;
+
+ if (sp == NULL) {
+ if (task)
+ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (kstack_end(stack))
+ break;
+ if (i && ((i % STACKSLOTS_PER_LINE) == 0))
+ printk("\n%s", log_lvl);
+ printk(" %08lx", *stack++);
+ touch_nmi_watchdog();
+ }
+ printk("\n");
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ unsigned long bp = 0;
+ unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ get_bp(bp);
+#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+ show_trace(NULL, NULL, &stack, bp);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+ int i;
+
+ print_modules();
+ __show_regs(regs, 0);
+
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)\n",
+ TASK_COMM_LEN, current->comm, task_pid_nr(current),
+ current_thread_info(), current, task_thread_info(current));
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+ if (!user_mode_vm(regs)) {
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+ u8 *ip;
+
+ printk(KERN_EMERG "Stack:\n");
+ show_stack_log_lvl(NULL, regs, ®s->sp,
+ 0, KERN_EMERG);
+
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at IP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(ip, c)) {
+ printk(" Bad EIP value.");
+ break;
+ }
+ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+ unsigned short ud2;
+
+ if (ip < PAGE_OFFSET)
+ return 0;
+ if (probe_kernel_address((unsigned short *)ip, ud2))
+ return 0;
+
+ return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+ unsigned long flags;
+
+ oops_enter();
+
+ if (die_owner != raw_smp_processor_id()) {
+ console_verbose();
+ raw_local_irq_save(flags);
+ __raw_spin_lock(&die_lock);
+ die_owner = smp_processor_id();
+ die_nest_count = 0;
+ bust_spinlocks(1);
+ } else {
+ raw_local_irq_save(flags);
+ }
+ die_nest_count++;
+ return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+ bust_spinlocks(0);
+ die_owner = -1;
+ add_taint(TAINT_DIE);
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
+
+ if (!regs)
+ return;
+
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+ if (panic_on_oops)
+ panic("Fatal exception");
+ oops_exit();
+ do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned short ss;
+ unsigned long sp;
+
+ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+ printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ printk("DEBUG_PAGEALLOC");
+#endif
+ printk("\n");
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
+ show_registers(regs);
+ /* Executive summary in case the oops scrolled away */
+ sp = (unsigned long) (®s->sp);
+ savesegment(ss, ss);
+ if (user_mode(regs)) {
+ sp = regs->sp;
+ ss = regs->ss & 0xffff;
+ }
+ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+ print_symbol("%s", regs->ip);
+ printk(" SS:ESP %04x:%08lx\n", ss, sp);
+ return 0;
+}
+
+/*
+ * This is gone through when something in the kernel has done something bad
+ * and is about to be terminated:
+ */
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned long flags = oops_begin();
+
+ if (die_nest_count < 3) {
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+ regs = NULL;
+ } else {
+ printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
+ }
+
+ oops_end(flags, regs, SIGSEGV);
+}
+
+static DEFINE_SPINLOCK(nmi_print_lock);
+
+void notrace __kprobes
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ spin_lock(&nmi_print_lock);
+ /*
+ * We are in trouble anyway, lets at least try
+ * to get a message out:
+ */
+ bust_spinlocks(1);
+ printk(KERN_EMERG "%s", str);
+ printk(" on CPU%d, ip %08lx, registers:\n",
+ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ if (do_panic)
+ panic("Non maskable interrupt");
+ console_silent();
+ spin_unlock(&nmi_print_lock);
+ bust_spinlocks(0);
+
+ /*
+ * If we are in kernel we are probably nested up pretty bad
+ * and might aswell get out now while we still can:
+ */
+ if (!user_mode_vm(regs)) {
+ current->thread.trap_no = 2;
+ crash_kexec(regs);
+ }
+
+ do_exit(SIGSEGV);
+}
+
+static int __init oops_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "panic"))
+ panic_on_oops = 1;
+ return 0;
+}
+early_param("oops", oops_setup);
+
+static int __init kstack_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+ return 0;
+}
+early_param("kstack", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+ code_bytes = simple_strtoul(s, NULL, 0);
+ if (code_bytes > 8192)
+ code_bytes = 8192;
+
+ return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
--- /dev/null
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+#define STACKSLOTS_PER_LINE 4
+#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+ printk(" [<%p>] %s%pS\n", (void *) address,
+ reliable ? "" : "? ", (void *) address);
+}
+
+static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+ unsigned *usedp, char **idp)
+{
+ static char ids[][8] = {
+ [DEBUG_STACK - 1] = "#DB",
+ [NMI_STACK - 1] = "NMI",
+ [DOUBLEFAULT_STACK - 1] = "#DF",
+ [STACKFAULT_STACK - 1] = "#SS",
+ [MCE_STACK - 1] = "#MC",
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+ [N_EXCEPTION_STACKS ...
+ N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
+#endif
+ };
+ unsigned k;
+
+ /*
+ * Iterate over all exception stacks, and figure out whether
+ * 'stack' is in one of them:
+ */
+ for (k = 0; k < N_EXCEPTION_STACKS; k++) {
+ unsigned long end = per_cpu(orig_ist, cpu).ist[k];
+ /*
+ * Is 'stack' above this exception frame's end?
+ * If yes then skip to the next frame.
+ */
+ if (stack >= end)
+ continue;
+ /*
+ * Is 'stack' above this exception frame's start address?
+ * If yes then we found the right frame.
+ */
+ if (stack >= end - EXCEPTION_STKSZ) {
+ /*
+ * Make sure we only iterate through an exception
+ * stack once. If it comes up for the second time
+ * then there's something wrong going on - just
+ * break out and return NULL:
+ */
+ if (*usedp & (1U << k))
+ break;
+ *usedp |= 1U << k;
+ *idp = ids[k];
+ return (unsigned long *)end;
+ }
+ /*
+ * If this is a debug stack, and if it has a larger size than
+ * the usual exception stacks, then 'stack' might still
+ * be within the lower portion of the debug stack:
+ */
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+ if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
+ unsigned j = N_EXCEPTION_STACKS - 1;
+
+ /*
+ * Black magic. A large debug stack is composed of
+ * multiple exception stack entries, which we
+ * iterate through now. Dont look:
+ */
+ do {
+ ++j;
+ end -= EXCEPTION_STKSZ;
+ ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
+ } while (stack < end - EXCEPTION_STKSZ);
+ if (*usedp & (1U << j))
+ break;
+ *usedp |= 1U << j;
+ *idp = ids[j];
+ return (unsigned long *)end;
+ }
+#endif
+ }
+ return NULL;
+}
+
+/*
+ * x86-64 can have up to three kernel stacks:
+ * process stack
+ * interrupt stack
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+ */
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+ void *p, unsigned int size, void *end)
+{
+ void *t = tinfo;
+ if (end) {
+ if (p < end && p >= (end-THREAD_SIZE))
+ return 1;
+ else
+ return 0;
+ }
+ return p > t && p < t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data,
+ unsigned long *end)
+{
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
+ unsigned long addr;
+
+ addr = *stack;
+ if (__kernel_text_address(addr)) {
+ if ((unsigned long) stack == bp + sizeof(long)) {
+ ops->address(data, addr, 1);
+ frame = frame->next_frame;
+ bp = (unsigned long) frame;
+ } else {
+ ops->address(data, addr, bp == 0);
+ }
+ }
+ stack++;
+ }
+ return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ const unsigned cpu = get_cpu();
+ unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
+ unsigned used = 0;
+ struct thread_info *tinfo;
+
+ if (!task)
+ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (task && task != current)
+ stack = (unsigned long *)task->thread.sp;
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+ get_bp(bp);
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+#endif
+
+ /*
+ * Print function call entries in all stacks, starting at the
+ * current stack address. If the stacks consist of nested
+ * exceptions
+ */
+ tinfo = task_thread_info(task);
+ for (;;) {
+ char *id;
+ unsigned long *estack_end;
+ estack_end = in_exception_stack(cpu, (unsigned long)stack,
+ &used, &id);
+
+ if (estack_end) {
+ if (ops->stack(data, id) < 0)
+ break;
+
+ bp = print_context_stack(tinfo, stack, bp, ops,
+ data, estack_end);
+ ops->stack(data, "<EOE>");
+ /*
+ * We link to the next stack via the
+ * second-to-last pointer (index -2 to end) in the
+ * exception stack:
+ */
+ stack = (unsigned long *) estack_end[-2];
+ continue;
+ }
+ if (irqstack_end) {
+ unsigned long *irqstack;
+ irqstack = irqstack_end -
+ (IRQSTACKSIZE - 64) / sizeof(*irqstack);
+
+ if (stack >= irqstack && stack < irqstack_end) {
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+ bp = print_context_stack(tinfo, stack, bp,
+ ops, data, irqstack_end);
+ /*
+ * We link to the next stack (which would be
+ * the process stack normally) the last
+ * pointer (index -1 to end) in the IRQ stack:
+ */
+ stack = (unsigned long *) (irqstack_end[-1]);
+ irqstack_end = NULL;
+ ops->stack(data, "EOI");
+ continue;
+ }
+ }
+ break;
+ }
+
+ /*
+ * This handles the process stack:
+ */
+ bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
+ put_cpu();
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ printk(data);
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+ printk("%s%s\n", (char *)data, msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+ printk("%s <%s> ", (char *)data, name);
+ return 0;
+}
+
+/*
+ * Print one address/symbol entries per line.
+ */
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ touch_nmi_watchdog();
+ printk(data);
+ printk_address(addr, reliable);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+ printk("%sCall Trace:\n", log_lvl);
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp)
+{
+ show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+ unsigned long *stack;
+ int i;
+ const int cpu = smp_processor_id();
+ unsigned long *irqstack_end =
+ (unsigned long *) (cpu_pda(cpu)->irqstackptr);
+ unsigned long *irqstack =
+ (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
+
+ /*
+ * debugging aid: "show_stack(NULL, NULL);" prints the
+ * back trace for this cpu.
+ */
+
+ if (sp == NULL) {
+ if (task)
+ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (stack >= irqstack && stack <= irqstack_end) {
+ if (stack == irqstack_end) {
+ stack = (unsigned long *) (irqstack_end[-1]);
+ printk(" <EOI> ");
+ }
+ } else {
+ if (((long) stack & (THREAD_SIZE-1)) == 0)
+ break;
+ }
+ if (i && ((i % STACKSLOTS_PER_LINE) == 0))
+ printk("\n%s", log_lvl);
+ printk(" %016lx", *stack++);
+ touch_nmi_watchdog();
+ }
+ printk("\n");
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ unsigned long bp = 0;
+ unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ get_bp(bp);
+#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+ show_trace(NULL, NULL, &stack, bp);
+}
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+ int i;
+ unsigned long sp;
+ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+
+ sp = regs->sp;
+ printk("CPU %d ", cpu);
+ __show_regs(regs, 1);
+ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+ cur->comm, cur->pid, task_thread_info(cur), cur);
+
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+ if (!user_mode(regs)) {
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+ u8 *ip;
+
+ printk(KERN_EMERG "Stack:\n");
+ show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
+ regs->bp, KERN_EMERG);
+
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at IP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(ip, c)) {
+ printk(" Bad RIP value.");
+ break;
+ }
+ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+ unsigned short ud2;
+
+ if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
+ return 0;
+
+ return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+ int cpu;
+ unsigned long flags;
+
+ oops_enter();
+
+ /* racy, but better than risking deadlock. */
+ raw_local_irq_save(flags);
+ cpu = smp_processor_id();
+ if (!__raw_spin_trylock(&die_lock)) {
+ if (cpu == die_owner)
+ /* nested oops. should stop eventually */;
+ else
+ __raw_spin_lock(&die_lock);
+ }
+ die_nest_count++;
+ die_owner = cpu;
+ console_verbose();
+ bust_spinlocks(1);
+ return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+ die_owner = -1;
+ bust_spinlocks(0);
+ die_nest_count--;
+ if (!die_nest_count)
+ /* Nest count reaches zero, release the lock. */
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
+ if (!regs) {
+ oops_exit();
+ return;
+ }
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+ if (panic_on_oops)
+ panic("Fatal exception");
+ oops_exit();
+ do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+ printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ printk("DEBUG_PAGEALLOC");
+#endif
+ printk("\n");
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
+ show_registers(regs);
+ add_taint(TAINT_DIE);
+ /* Executive summary in case the oops scrolled away */
+ printk(KERN_ALERT "RIP ");
+ printk_address(regs->ip, 1);
+ printk(" RSP <%016lx>\n", regs->sp);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ return 0;
+}
+
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned long flags = oops_begin();
+
+ if (!user_mode(regs))
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+ regs = NULL;
+ oops_end(flags, regs, SIGSEGV);
+}
+
+notrace __kprobes void
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+ unsigned long flags;
+
+ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ flags = oops_begin();
+ /*
+ * We are in trouble anyway, lets at least try
+ * to get a message out.
+ */
+ printk(KERN_EMERG "%s", str);
+ printk(" on CPU%d, ip %08lx, registers:\n",
+ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ if (do_panic || panic_on_oops)
+ panic("Non maskable interrupt");
+ oops_end(flags, NULL, SIGBUS);
+ nmi_exit();
+ local_irq_enable();
+ do_exit(SIGBUS);
+}
+
+static int __init oops_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "panic"))
+ panic_on_oops = 1;
+ return 0;
+}
+early_param("oops", oops_setup);
+
+static int __init kstack_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+ return 0;
+}
+early_param("kstack", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+ code_bytes = simple_strtoul(s, NULL, 0);
+ if (code_bytes > 8192)
+ code_bytes = 8192;
+
+ return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
movl $(__USER_DS), %ecx
movl %ecx, %ds
movl %ecx, %es
+ TRACE_IRQS_OFF
movl %esp,%eax # pt_regs pointer
call *%edi
jmp ret_from_exception
RING0_INT_FRAME
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- GET_CR0_INTO_EAX
- testl $0x4, %eax # EM (math emulation bit)
- jne device_not_available_emulate
- preempt_stop(CLBR_ANY)
- call math_state_restore
- jmp ret_from_exception
-device_not_available_emulate:
- pushl $0 # temporary storage for ORIG_EIP
+ pushl $do_device_not_available
CFI_ADJUST_CFA_OFFSET 4
- call math_emulate
- addl $4, %esp
- CFI_ADJUST_CFA_OFFSET -4
- jmp ret_from_exception
+ jmp error_code
CFI_ENDPROC
END(device_not_available)
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # error code 0
movl %esp,%eax # pt_regs pointer
call do_debug
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_nmi
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
FIXUP_ESPFIX_STACK # %eax == %esp
xorl %edx,%edx # zero error code
call do_nmi
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_int3
RING0_INT_FRAME
pushl $0
CFI_ADJUST_CFA_OFFSET 4
- pushl machine_check_vector
+ pushl $do_machine_check
CFI_ADJUST_CFA_OFFSET 4
jmp error_code
CFI_ENDPROC
SAVE_ARGS
leaq -ARGOFFSET(%rsp),%rdi # arg1 for handler
pushq %rbp
+ /*
+ * Save rbp twice: One is for marking the stack frame, as usual, and the
+ * other, to fill pt_regs properly. This is because bx comes right
+ * before the last saved register in that structure, and not bp. If the
+ * base pointer were in the place bx is today, this would not be needed.
+ */
+ movq %rbp, -8(%rsp)
CFI_ADJUST_CFA_OFFSET 8
CFI_REL_OFFSET rbp, 0
movq %rsp,%rbp
.if \ist
movq %gs:pda_data_offset, %rbp
.endif
+ .if \irqtrace
+ TRACE_IRQS_OFF
+ .endif
movq %rsp,%rdi
movq ORIG_RAX(%rsp),%rsi
movq $-1,ORIG_RAX(%rsp)
je error_kernelspace
error_swapgs:
SWAPGS
-error_sti:
+error_sti:
+ TRACE_IRQS_OFF
movq %rdi,RDI(%rsp)
CFI_REL_OFFSET rdi,RDI
movq %rsp,%rdi
END(simd_coprocessor_error)
ENTRY(device_not_available)
- zeroentry math_state_restore
+ zeroentry do_device_not_available
END(device_not_available)
/* runs on exception stack */
};
extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
#endif
struct mip_reg {
}
#ifdef CONFIG_ACPI
-int __init
-find_unisys_acpi_oem_table(unsigned long *oem_addr)
+static unsigned long oem_addrX;
+static unsigned long oem_size;
+int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
{
struct acpi_table_header *header = NULL;
int i = 0;
- while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
+ acpi_size tbl_size;
+
+ while (ACPI_SUCCESS(acpi_get_table_with_size("OEM1", i++, &header, &tbl_size))) {
if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
struct oem_table *t = (struct oem_table *)header;
- *oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
- t->OEMTableSize);
+
+ oem_addrX = t->OEMTableAddr;
+ oem_size = t->OEMTableSize;
+ early_acpi_os_unmap_memory(header, tbl_size);
+
+ *oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
+ oem_size);
return 0;
}
+ early_acpi_os_unmap_memory(header, tbl_size);
}
return -1;
}
+
+void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
+{
+ if (!oem_addr)
+ return;
+
+ __acpi_unmap_table((char *)oem_addr, oem_size);
+}
#endif
static void
unsigned long val, apicid, lapicid;
int pnode;
- apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
+ apicid = per_cpu(x86_cpu_to_apicid, cpu);
lapicid = apicid & 0x3f; /* ZZZ macro needed */
pnode = uv_apicid_to_pnode(apicid);
val =
return uv_read_apic_id() >> index_msb;
}
-#ifdef ZZZ /* Needs x2apic patch */
static void uv_send_IPI_self(int vector)
{
apic_write(APIC_SELF_IPI, vector);
}
-#endif
struct genapic apic_x2apic_uv_x = {
.name = "UV large system",
.int_delivery_mode = dest_Fixed,
.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
.target_cpus = uv_target_cpus,
- .vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
+ .vector_allocation_domain = uv_vector_allocation_domain,
.apic_id_registered = uv_apic_id_registered,
.init_apic_ldr = uv_init_apic_ldr,
.send_IPI_all = uv_send_IPI_all,
.send_IPI_allbutself = uv_send_IPI_allbutself,
.send_IPI_mask = uv_send_IPI_mask,
- /* ZZZ.send_IPI_self = uv_send_IPI_self, */
+ .send_IPI_self = uv_send_IPI_self,
.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
- .phys_pkg_id = phys_pkg_id, /* Fixme ZZZ */
+ .phys_pkg_id = phys_pkg_id,
.get_apic_id = get_apic_id,
.set_apic_id = set_apic_id,
.apic_id_mask = (0xFFFFFFFFu),
enum map_type {map_wb, map_uc};
-static __init void map_high(char *id, unsigned long base, int shift, enum map_type map_type)
+static __init void map_high(char *id, unsigned long base, int shift,
+ int max_pnode, enum map_type map_type)
{
unsigned long bytes, paddr;
paddr = base << shift;
- bytes = (1UL << shift);
+ bytes = (1UL << shift) * (max_pnode + 1);
printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
paddr + bytes);
if (map_type == map_uc)
gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
if (gru.s.enable)
- map_high("GRU", gru.s.base, shift, map_wb);
+ map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
}
static __init void map_config_high(int max_pnode)
cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
if (cfg.s.enable)
- map_high("CONFIG", cfg.s.base, shift, map_uc);
+ map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
}
static __init void map_mmr_high(int max_pnode)
mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
if (mmr.s.enable)
- map_high("MMR", mmr.s.base, shift, map_uc);
+ map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
}
static __init void map_mmioh_high(int max_pnode)
mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
if (mmioh.s.enable)
- map_high("MMIOH", mmioh.s.base, shift, map_uc);
+ map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
}
static __init void uv_rtc_init(void)
/* start of EBDA area */
ebda_addr = get_bios_ebda();
+ printk(KERN_INFO "BIOS EBDA/lowmem at: %08x/%08x\n", ebda_addr, lowmem);
/* Fixup: bios puts an EBDA in the top 64K segment */
/* of conventional memory, but does not adjust lowmem. */
hd.hd_phys_address = hpet_address;
hd.hd_address = hpet;
hd.hd_nirqs = nrtimers;
- hd.hd_flags = HPET_DATA_PLATFORM;
hpet_reserve_timer(&hd, 0);
#ifdef CONFIG_HPET_EMULATE_RTC
hpet_reserve_timer(&hd, 1);
#endif
+ /*
+ * NOTE that hd_irq[] reflects IOAPIC input pins (LEGACY_8254
+ * is wrong for i8259!) not the output IRQ. Many BIOS writers
+ * don't bother configuring *any* comparator interrupts.
+ */
hd.hd_irq[0] = HPET_LEGACY_8254;
hd.hd_irq[1] = HPET_LEGACY_RTC;
[IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
};
-static void __init init_ISA_irqs (void)
+void __init init_ISA_irqs(void)
{
int i;
void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
-void __init native_init_IRQ(void)
+static void __init smp_intr_init(void)
{
- int i;
-
- init_ISA_irqs();
- /*
- * Cover the whole vector space, no vector can escape
- * us. (some of these will be overridden and become
- * 'special' SMP interrupts)
- */
- for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
- int vector = FIRST_EXTERNAL_VECTOR + i;
- if (vector != IA32_SYSCALL_VECTOR)
- set_intr_gate(vector, interrupt[i]);
- }
-
#ifdef CONFIG_SMP
/*
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
/* Low priority IPI to cleanup after moving an irq */
set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
#endif
+}
+
+static void __init apic_intr_init(void)
+{
+ smp_intr_init();
+
alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
/* IPI vectors for APIC spurious and error interrupts */
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
+}
+
+void __init native_init_IRQ(void)
+{
+ int i;
+
+ init_ISA_irqs();
+ /*
+ * Cover the whole vector space, no vector can escape
+ * us. (some of these will be overridden and become
+ * 'special' SMP interrupts)
+ */
+ for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
+ int vector = FIRST_EXTERNAL_VECTOR + i;
+ if (vector != IA32_SYSCALL_VECTOR)
+ set_intr_gate(vector, interrupt[i]);
+ }
+
+ apic_intr_init();
if (!acpi_ioapic)
setup_irq(2, &irq2);
}
}
-void __show_registers(struct pt_regs *regs, int all)
+void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
unsigned long d0, d1, d2, d3, d6, d7;
void show_regs(struct pt_regs *regs)
{
- __show_registers(regs, 1);
+ __show_regs(regs, 1);
show_trace(NULL, regs, ®s->sp, regs->bp);
}
}
/* Prints also some state that isn't saved in the pt_regs */
-void __show_regs(struct pt_regs *regs)
+void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;
unsigned long d0, d1, d2, d3, d6, d7;
rdmsrl(MSR_GS_BASE, gs);
rdmsrl(MSR_KERNEL_GS_BASE, shadowgs);
+ if (!all)
+ return;
+
cr0 = read_cr0();
cr2 = read_cr2();
cr3 = read_cr3();
void show_regs(struct pt_regs *regs)
{
printk(KERN_INFO "CPU %d:", smp_processor_id());
- __show_regs(regs);
+ __show_regs(regs, 1);
show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
}
printk(KERN_DEBUG "Force enabled HPET at resume\n");
}
+static u32 ati_ixp4x0_rev(struct pci_dev *dev)
+{
+ u32 d;
+ u8 b;
+
+ pci_read_config_byte(dev, 0xac, &b);
+ b &= ~(1<<5);
+ pci_write_config_byte(dev, 0xac, b);
+ pci_read_config_dword(dev, 0x70, &d);
+ d |= 1<<8;
+ pci_write_config_dword(dev, 0x70, d);
+ pci_read_config_dword(dev, 0x8, &d);
+ d &= 0xff;
+ dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
+ return d;
+}
+
static void ati_force_enable_hpet(struct pci_dev *dev)
{
- u32 uninitialized_var(val);
+ u32 d, val;
+ u8 b;
if (hpet_address || force_hpet_address)
return;
return;
}
+ d = ati_ixp4x0_rev(dev);
+ if (d < 0x82)
+ return;
+
+ /* base address */
pci_write_config_dword(dev, 0x14, 0xfed00000);
pci_read_config_dword(dev, 0x14, &val);
+
+ /* enable interrupt */
+ outb(0x72, 0xcd6); b = inb(0xcd7);
+ b |= 0x1;
+ outb(0x72, 0xcd6); outb(b, 0xcd7);
+ outb(0x72, 0xcd6); b = inb(0xcd7);
+ if (!(b & 0x1))
+ return;
+ pci_read_config_dword(dev, 0x64, &d);
+ d |= (1<<10);
+ pci_write_config_dword(dev, 0x64, d);
+ pci_read_config_dword(dev, 0x64, &d);
+ if (!(d & (1<<10)))
+ return;
+
force_hpet_address = val;
force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
force_hpet_address);
cached_dev = dev;
- return;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
ati_force_enable_hpet);
if (clen > MAX_MAP_CHUNK-slop)
clen = MAX_MAP_CHUNK-slop;
mapaddr = ramdisk_image & PAGE_MASK;
- p = early_ioremap(mapaddr, clen+slop);
+ p = early_memremap(mapaddr, clen+slop);
memcpy(q, p+slop, clen);
early_iounmap(p, clen+slop);
q += clen;
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, PAGE_SIZE);
+ data = early_memremap(pa_data, PAGE_SIZE);
switch (data->type) {
case SETUP_E820_EXT:
parse_e820_ext(data, pa_data);
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, sizeof(*data));
+ data = early_memremap(pa_data, sizeof(*data));
e820_update_range(pa_data, sizeof(*data)+data->len,
E820_RAM, E820_RESERVED_KERN);
found = 1;
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, sizeof(*data));
+ data = early_memremap(pa_data, sizeof(*data));
sprintf(buf, "setup data %x", data->type);
reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
pa_data = data->next;
*/
acpi_boot_table_init();
+ early_acpi_boot_init();
+
#ifdef CONFIG_ACPI_NUMA
/*
* Parse SRAT to discover nodes.
* does not change while we are assigning vectors to cpus. Holding
* this lock ensures we don't half assign or remove an irq from a cpu.
*/
- ipi_call_lock_irq();
+ ipi_call_lock();
lock_vector_lock();
__setup_vector_irq(smp_processor_id());
cpu_set(smp_processor_id(), cpu_online_map);
unlock_vector_lock();
- ipi_call_unlock_irq();
+ ipi_call_unlock();
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
+ /* enable local interrupts */
+ local_irq_enable();
+
setup_secondary_clock();
wmb();
* Give the other CPU some time to accept the IPI.
*/
udelay(200);
- maxlvt = lapic_get_maxlvt();
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
- accept_status = (apic_read(APIC_ESR) & 0xEF);
+ if (APIC_INTEGRATED(apic_version[phys_apicid])) {
+ maxlvt = lapic_get_maxlvt();
+ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
+ apic_write(APIC_ESR, 0);
+ accept_status = (apic_read(APIC_ESR) & 0xEF);
+ }
pr_debug("NMI sent.\n");
if (send_status)
check_nmi_watchdog();
}
-#ifdef CONFIG_HOTPLUG_CPU
-
-static void remove_siblinginfo(int cpu)
-{
- int sibling;
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
- cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
- /*/
- * last thread sibling in this cpu core going down
- */
- if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
- cpu_data(sibling).booted_cores--;
- }
-
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
- cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
- cpus_clear(per_cpu(cpu_sibling_map, cpu));
- cpus_clear(per_cpu(cpu_core_map, cpu));
- c->phys_proc_id = 0;
- c->cpu_core_id = 0;
- cpu_clear(cpu, cpu_sibling_setup_map);
-}
-
-static int additional_cpus __initdata = -1;
-
-static __init int setup_additional_cpus(char *s)
-{
- return s && get_option(&s, &additional_cpus) ? 0 : -EINVAL;
-}
-early_param("additional_cpus", setup_additional_cpus);
-
/*
* cpu_possible_map should be static, it cannot change as cpu's
* are onlined, or offlined. The reason is per-cpu data-structures
*/
__init void prefill_possible_map(void)
{
- int i;
- int possible;
+ int i, possible;
/* no processor from mptable or madt */
if (!num_processors)
num_processors = 1;
- if (additional_cpus == -1) {
- if (disabled_cpus > 0)
- additional_cpus = disabled_cpus;
- else
- additional_cpus = 0;
- }
-
- possible = num_processors + additional_cpus;
+ possible = num_processors + disabled_cpus;
if (possible > NR_CPUS)
possible = NR_CPUS;
nr_cpu_ids = possible;
}
+#ifdef CONFIG_HOTPLUG_CPU
+
+static void remove_siblinginfo(int cpu)
+{
+ int sibling;
+ struct cpuinfo_x86 *c = &cpu_data(cpu);
+
+ for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
+ cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
+ /*/
+ * last thread sibling in this cpu core going down
+ */
+ if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
+ cpu_data(sibling).booted_cores--;
+ }
+
+ for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
+ cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
+ cpus_clear(per_cpu(cpu_sibling_map, cpu));
+ cpus_clear(per_cpu(cpu_core_map, cpu));
+ c->phys_proc_id = 0;
+ c->cpu_core_id = 0;
+ cpu_clear(cpu, cpu_sibling_setup_map);
+}
+
static void __ref remove_cpu_from_maps(int cpu)
{
cpu_clear(cpu, cpu_online_map);
unsigned long pc = instruction_pointer(regs);
#ifdef CONFIG_SMP
- if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->cs) &&
- in_lock_functions(pc)) {
+ if (!user_mode_vm(regs) && in_lock_functions(pc)) {
#ifdef CONFIG_FRAME_POINTER
- return *(unsigned long *)(regs->bp + 4);
+ return *(unsigned long *)(regs->bp + sizeof(long));
#else
unsigned long *sp = (unsigned long *)®s->sp;
do_timer_interrupt_hook();
+#ifdef CONFIG_MCA
if (MCA_bus) {
/* The PS/2 uses level-triggered interrupts. You can't
turn them off, nor would you want to (any attempt to
u8 irq_v = inb_p( 0x61 ); /* read the current state */
outb_p( irq_v|0x80, 0x61 ); /* reset the IRQ */
}
+#endif
return IRQ_HANDLED;
}
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/time.h>
+#include <linux/mca.h>
#include <asm/i8253.h>
#include <asm/hpet.h>
/* Assume the lock function has either no stack frame or a copy
of flags from PUSHF
Eflags always has bits 22 and up cleared unlike kernel addresses. */
- if (!user_mode(regs) && in_lock_functions(pc)) {
+ if (!user_mode_vm(regs) && in_lock_functions(pc)) {
+#ifdef CONFIG_FRAME_POINTER
+ return *(unsigned long *)(regs->bp + sizeof(long));
+#else
unsigned long *sp = (unsigned long *)regs->sp;
if (sp[0] >> 22)
return sp[0];
if (sp[1] >> 22)
return sp[1];
+#endif
}
return pc;
}
EXPORT_SYMBOL(profile_pc);
-static irqreturn_t timer_event_interrupt(int irq, void *dev_id)
+irqreturn_t timer_interrupt(int irq, void *dev_id)
{
add_pda(irq0_irqs, 1);
global_clock_event->event_handler(global_clock_event);
+#ifdef CONFIG_MCA
+ if (MCA_bus) {
+ u8 irq_v = inb_p(0x61); /* read the current state */
+ outb_p(irq_v|0x80, 0x61); /* reset the IRQ */
+ }
+#endif
+
return IRQ_HANDLED;
}
}
static struct irqaction irq0 = {
- .handler = timer_event_interrupt,
+ .handler = timer_interrupt,
.flags = IRQF_DISABLED | IRQF_IRQPOLL | IRQF_NOBALANCING,
.mask = CPU_MASK_NONE,
.name = "timer"
if (!hpet_enable())
setup_pit_timer();
+ irq0.mask = cpumask_of_cpu(0);
setup_irq(0, &irq0);
}
void __init time_init(void)
{
tsc_init();
- if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
- vgetcpu_mode = VGETCPU_RDTSCP;
- else
- vgetcpu_mode = VGETCPU_LSL;
late_time_init = choose_time_init();
}
*/
/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'asm.s'.
+ * Handle hardware traps and faults.
*/
#include <linux/interrupt.h>
#include <linux/kallsyms.h>
#include <linux/spinlock.h>
-#include <linux/highmem.h>
#include <linux/kprobes.h>
#include <linux/uaccess.h>
#include <linux/utsname.h>
#include <linux/bug.h>
#include <linux/nmi.h>
#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/io.h>
#ifdef CONFIG_EISA
#include <linux/ioport.h>
#include <linux/edac.h>
#endif
-#include <asm/arch_hooks.h>
#include <asm/stacktrace.h>
#include <asm/processor.h>
#include <asm/debugreg.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/unwind.h>
+#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/i387.h>
+
+#include <mach_traps.h>
+
+#ifdef CONFIG_X86_64
+#include <asm/pgalloc.h>
+#include <asm/proto.h>
+#include <asm/pda.h>
+#else
+#include <asm/processor-flags.h>
+#include <asm/arch_hooks.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include <asm/io.h>
#include <asm/traps.h>
-#include "mach_traps.h"
+#include "cpu/mcheck/mce.h"
DECLARE_BITMAP(used_vectors, NR_VECTORS);
EXPORT_SYMBOL_GPL(used_vectors);
*/
gate_desc idt_table[256]
__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 24;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-void printk_address(unsigned long address, int reliable)
-{
-#ifdef CONFIG_KALLSYMS
- unsigned long offset = 0;
- unsigned long symsize;
- const char *symname;
- char *modname;
- char *delim = ":";
- char namebuf[KSYM_NAME_LEN];
- char reliab[4] = "";
-
- symname = kallsyms_lookup(address, &symsize, &offset,
- &modname, namebuf);
- if (!symname) {
- printk(" [<%08lx>]\n", address);
- return;
- }
- if (!reliable)
- strcpy(reliab, "? ");
-
- if (!modname)
- modname = delim = "";
- printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
- address, reliab, delim, modname, delim, symname, offset, symsize);
-#else
- printk(" [<%08lx>]\n", address);
#endif
-}
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size)
-{
- void *t = tinfo;
- return p > t && p <= t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- struct stack_frame *frame = (struct stack_frame *)bp;
-
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
- unsigned long addr;
-
- addr = *stack;
- if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 4) {
- ops->address(data, addr, 1);
- frame = frame->next_frame;
- bp = (unsigned long) frame;
- } else {
- ops->address(data, addr, bp == 0);
- }
- }
- stack++;
- }
- return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- if (!task)
- task = current;
-
- if (!stack) {
- unsigned long dummy;
- stack = &dummy;
- if (task != current)
- stack = (unsigned long *)task->thread.sp;
- }
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp) {
- if (task == current) {
- /* Grab bp right from our regs */
- asm("movl %%ebp, %0" : "=r" (bp) :);
- } else {
- /* bp is the last reg pushed by switch_to */
- bp = *(unsigned long *) task->thread.sp;
- }
- }
-#endif
-
- for (;;) {
- struct thread_info *context;
-
- context = (struct thread_info *)
- ((unsigned long)stack & (~(THREAD_SIZE - 1)));
- bp = print_context_stack(context, stack, bp, ops, data);
- /*
- * Should be after the line below, but somewhere
- * in early boot context comes out corrupted and we
- * can't reference it:
- */
- if (ops->stack(data, "IRQ") < 0)
- break;
- stack = (unsigned long *)context->previous_esp;
- if (!stack)
- break;
- touch_nmi_watchdog();
- }
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
- printk(data);
- print_symbol(msg, symbol);
- printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
- printk("%s%s\n", (char *)data, msg);
-}
-static int print_trace_stack(void *data, char *name)
-{
- return 0;
-}
-
-/*
- * Print one address/symbol entries per line.
- */
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
- printk("%s [<%08lx>] ", (char *)data, addr);
- if (!reliable)
- printk("? ");
- print_symbol("%s\n", addr);
- touch_nmi_watchdog();
-}
-
-static const struct stacktrace_ops print_trace_ops = {
- .warning = print_trace_warning,
- .warning_symbol = print_trace_warning_symbol,
- .stack = print_trace_stack,
- .address = print_trace_address,
-};
+static int ignore_nmis;
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl)
+static inline void conditional_sti(struct pt_regs *regs)
{
- dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
- printk("%s =======================\n", log_lvl);
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
}
-void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp)
+static inline void preempt_conditional_sti(struct pt_regs *regs)
{
- show_trace_log_lvl(task, regs, stack, bp, "");
+ inc_preempt_count();
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
}
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
+static inline void preempt_conditional_cli(struct pt_regs *regs)
{
- unsigned long *stack;
- int i;
-
- if (sp == NULL) {
- if (task)
- sp = (unsigned long *)task->thread.sp;
- else
- sp = (unsigned long *)&sp;
- }
-
- stack = sp;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (kstack_end(stack))
- break;
- if (i && ((i % 8) == 0))
- printk("\n%s ", log_lvl);
- printk("%08lx ", *stack++);
- }
- printk("\n%sCall Trace:\n", log_lvl);
-
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_disable();
+ dec_preempt_count();
}
-void show_stack(struct task_struct *task, unsigned long *sp)
+#ifdef CONFIG_X86_32
+static inline void
+die_if_kernel(const char *str, struct pt_regs *regs, long err)
{
- printk(" ");
- show_stack_log_lvl(task, NULL, sp, 0, "");
+ if (!user_mode_vm(regs))
+ die(str, regs, err);
}
/*
- * The architecture-independent dump_stack generator
+ * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
+ * invalid offset set (the LAZY one) and the faulting thread has
+ * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS,
+ * we set the offset field correctly and return 1.
*/
-void dump_stack(void)
+static int lazy_iobitmap_copy(void)
{
- unsigned long bp = 0;
- unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp)
- asm("movl %%ebp, %0" : "=r" (bp):);
-#endif
-
- printk("Pid: %d, comm: %.20s %s %s %.*s\n",
- current->pid, current->comm, print_tainted(),
- init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
-
- show_trace(current, NULL, &stack, bp);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
+ struct thread_struct *thread;
+ struct tss_struct *tss;
+ int cpu;
- print_modules();
- __show_registers(regs, 0);
+ cpu = get_cpu();
+ tss = &per_cpu(init_tss, cpu);
+ thread = ¤t->thread;
- printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
- TASK_COMM_LEN, current->comm, task_pid_nr(current),
- current_thread_info(), current, task_thread_info(current));
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode_vm(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk("\n" KERN_EMERG "Stack: ");
- show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
-
- printk(KERN_EMERG "Code: ");
-
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at EIP */
- ip = (u8 *)regs->ip;
- code_len = code_len - code_prologue + 1;
- }
- for (i = 0; i < code_len; i++, ip++) {
- if (ip < (u8 *)PAGE_OFFSET ||
- probe_kernel_address(ip, c)) {
- printk(" Bad EIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk("<%02x> ", c);
- else
- printk("%02x ", c);
+ if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
+ thread->io_bitmap_ptr) {
+ memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
+ thread->io_bitmap_max);
+ /*
+ * If the previously set map was extending to higher ports
+ * than the current one, pad extra space with 0xff (no access).
+ */
+ if (thread->io_bitmap_max < tss->io_bitmap_max) {
+ memset((char *) tss->io_bitmap +
+ thread->io_bitmap_max, 0xff,
+ tss->io_bitmap_max - thread->io_bitmap_max);
}
- }
- printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (ip < PAGE_OFFSET)
- return 0;
- if (probe_kernel_address((unsigned short *)ip, ud2))
- return 0;
-
- return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
- unsigned long flags;
-
- oops_enter();
-
- if (die_owner != raw_smp_processor_id()) {
- console_verbose();
- raw_local_irq_save(flags);
- __raw_spin_lock(&die_lock);
- die_owner = smp_processor_id();
- die_nest_count = 0;
- bust_spinlocks(1);
- } else {
- raw_local_irq_save(flags);
- }
- die_nest_count++;
- return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
- bust_spinlocks(0);
- die_owner = -1;
- add_taint(TAINT_DIE);
- __raw_spin_unlock(&die_lock);
- raw_local_irq_restore(flags);
-
- if (!regs)
- return;
-
- if (kexec_should_crash(current))
- crash_kexec(regs);
-
- if (in_interrupt())
- panic("Fatal exception in interrupt");
-
- if (panic_on_oops)
- panic("Fatal exception");
-
- oops_exit();
- do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned short ss;
- unsigned long sp;
+ tss->io_bitmap_max = thread->io_bitmap_max;
+ tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
+ tss->io_bitmap_owner = thread;
+ put_cpu();
- printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
- printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
- printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
-#endif
- printk("\n");
- if (notify_die(DIE_OOPS, str, regs, err,
- current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
return 1;
-
- show_registers(regs);
- /* Executive summary in case the oops scrolled away */
- sp = (unsigned long) (®s->sp);
- savesegment(ss, ss);
- if (user_mode(regs)) {
- sp = regs->sp;
- ss = regs->ss & 0xffff;
}
- printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
- print_symbol("%s", regs->ip);
- printk(" SS:ESP %04x:%08lx\n", ss, sp);
- return 0;
-}
-
-/*
- * This is gone through when something in the kernel has done something bad
- * and is about to be terminated:
- */
-void die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned long flags = oops_begin();
-
- if (die_nest_count < 3) {
- report_bug(regs->ip, regs);
-
- if (__die(str, regs, err))
- regs = NULL;
- } else {
- printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
- }
-
- oops_end(flags, regs, SIGSEGV);
-}
+ put_cpu();
-static inline void
-die_if_kernel(const char *str, struct pt_regs *regs, long err)
-{
- if (!user_mode_vm(regs))
- die(str, regs, err);
+ return 0;
}
+#endif
static void __kprobes
-do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs,
+do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
long error_code, siginfo_t *info)
{
struct task_struct *tsk = current;
+#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK) {
- if (vm86)
+ /*
+ * traps 0, 1, 3, 4, and 5 should be forwarded to vm86.
+ * On nmi (interrupt 2), do_trap should not be called.
+ */
+ if (trapnr < 6)
goto vm86_trap;
goto trap_signal;
}
+#endif
if (!user_mode(regs))
goto kernel_trap;
+#ifdef CONFIG_X86_32
trap_signal:
+#endif
/*
* We want error_code and trap_no set for userspace faults and
* kernelspace faults which result in die(), but not
tsk->thread.error_code = error_code;
tsk->thread.trap_no = trapnr;
+#ifdef CONFIG_X86_64
+ if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
+ printk_ratelimit()) {
+ printk(KERN_INFO
+ "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+ tsk->comm, tsk->pid, str,
+ regs->ip, regs->sp, error_code);
+ print_vma_addr(" in ", regs->ip);
+ printk("\n");
+ }
+#endif
+
if (info)
force_sig_info(signr, info, tsk);
else
}
return;
+#ifdef CONFIG_X86_32
vm86_trap:
if (handle_vm86_trap((struct kernel_vm86_regs *) regs,
error_code, trapnr))
goto trap_signal;
return;
+#endif
}
#define DO_ERROR(trapnr, signr, str, name) \
-void do_##name(struct pt_regs *regs, long error_code) \
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
- trace_hardirqs_fixup(); \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
- do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
+ conditional_sti(regs); \
+ do_trap(trapnr, signr, str, regs, error_code, NULL); \
}
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
-void do_##name(struct pt_regs *regs, long error_code) \
+#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
siginfo_t info; \
- if (irq) \
- local_irq_enable(); \
info.si_signo = signr; \
info.si_errno = 0; \
info.si_code = sicode; \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
- do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
+ conditional_sti(regs); \
+ do_trap(trapnr, signr, str, regs, error_code, &info); \
}
-#define DO_VM86_ERROR(trapnr, signr, str, name) \
-void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
-}
-
-#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- siginfo_t info; \
- info.si_signo = signr; \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void __user *)siaddr; \
- trace_hardirqs_fixup(); \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
-}
-
-DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-#ifndef CONFIG_KPROBES
-DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
-#endif
-DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
+DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+DO_ERROR(4, SIGSEGV, "overflow", overflow)
+DO_ERROR(5, SIGSEGV, "bounds", bounds)
+DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+#ifdef CONFIG_X86_32
DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
-DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+#endif
+DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+
+#ifdef CONFIG_X86_64
+/* Runs on IST stack */
+dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code)
+{
+ if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
+ 12, SIGBUS) == NOTIFY_STOP)
+ return;
+ preempt_conditional_sti(regs);
+ do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+}
+
+dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
+{
+ static const char str[] = "double fault";
+ struct task_struct *tsk = current;
+
+ /* Return not checked because double check cannot be ignored */
+ notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
-void __kprobes
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = 8;
+
+ /* This is always a kernel trap and never fixable (and thus must
+ never return). */
+ for (;;)
+ die(str, regs, error_code);
+}
+#endif
+
+dotraplinkage void __kprobes
do_general_protection(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk;
- struct thread_struct *thread;
- struct tss_struct *tss;
- int cpu;
- cpu = get_cpu();
- tss = &per_cpu(init_tss, cpu);
- thread = ¤t->thread;
-
- /*
- * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
- * invalid offset set (the LAZY one) and the faulting thread has
- * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS
- * and we set the offset field correctly. Then we let the CPU to
- * restart the faulting instruction.
- */
- if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
- thread->io_bitmap_ptr) {
- memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
- thread->io_bitmap_max);
- /*
- * If the previously set map was extending to higher ports
- * than the current one, pad extra space with 0xff (no access).
- */
- if (thread->io_bitmap_max < tss->io_bitmap_max) {
- memset((char *) tss->io_bitmap +
- thread->io_bitmap_max, 0xff,
- tss->io_bitmap_max - thread->io_bitmap_max);
- }
- tss->io_bitmap_max = thread->io_bitmap_max;
- tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
- tss->io_bitmap_owner = thread;
- put_cpu();
+ conditional_sti(regs);
+#ifdef CONFIG_X86_32
+ if (lazy_iobitmap_copy()) {
+ /* restart the faulting instruction */
return;
}
- put_cpu();
if (regs->flags & X86_VM_MASK)
goto gp_in_vm86;
+#endif
tsk = current;
if (!user_mode(regs))
force_sig(SIGSEGV, tsk);
return;
+#ifdef CONFIG_X86_32
gp_in_vm86:
local_irq_enable();
handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
return;
+#endif
gp_in_kernel:
if (fixup_exception(regs))
printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
/* Clear and disable the memory parity error line. */
- clear_mem_error(reason);
+ reason = (reason & 0xf) | 4;
+ outb(reason, 0x61);
}
static notrace __kprobes void
static notrace __kprobes void
unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
{
- if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+ if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
+ NOTIFY_STOP)
return;
#ifdef CONFIG_MCA
/*
printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
}
-static DEFINE_SPINLOCK(nmi_print_lock);
-
-void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
-{
- if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- spin_lock(&nmi_print_lock);
- /*
- * We are in trouble anyway, lets at least try
- * to get a message out:
- */
- bust_spinlocks(1);
- printk(KERN_EMERG "%s", str);
- printk(" on CPU%d, ip %08lx, registers:\n",
- smp_processor_id(), regs->ip);
- show_registers(regs);
- if (do_panic)
- panic("Non maskable interrupt");
- console_silent();
- spin_unlock(&nmi_print_lock);
- bust_spinlocks(0);
-
- /*
- * If we are in kernel we are probably nested up pretty bad
- * and might aswell get out now while we still can:
- */
- if (!user_mode_vm(regs)) {
- current->thread.trap_no = 2;
- crash_kexec(regs);
- }
-
- do_exit(SIGSEGV);
-}
-
static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
{
unsigned char reason = 0;
mem_parity_error(reason, regs);
if (reason & 0x40)
io_check_error(reason, regs);
+#ifdef CONFIG_X86_32
/*
* Reassert NMI in case it became active meanwhile
* as it's edge-triggered:
*/
reassert_nmi();
+#endif
}
-notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)
+dotraplinkage notrace __kprobes void
+do_nmi(struct pt_regs *regs, long error_code)
{
- int cpu;
-
nmi_enter();
- cpu = smp_processor_id();
-
- ++nmi_count(cpu);
+#ifdef CONFIG_X86_32
+ { int cpu; cpu = smp_processor_id(); ++nmi_count(cpu); }
+#else
+ add_pda(__nmi_count, 1);
+#endif
if (!ignore_nmis)
default_do_nmi(regs);
acpi_nmi_enable();
}
-#ifdef CONFIG_KPROBES
-void __kprobes do_int3(struct pt_regs *regs, long error_code)
+/* May run on IST stack. */
+dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
- trace_hardirqs_fixup();
-
+#ifdef CONFIG_KPROBES
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
return;
- /*
- * This is an interrupt gate, because kprobes wants interrupts
- * disabled. Normal trap handlers don't.
- */
- restore_interrupts(regs);
+#else
+ if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
+ == NOTIFY_STOP)
+ return;
+#endif
+
+ preempt_conditional_sti(regs);
+ do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+}
- do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
+#ifdef CONFIG_X86_64
+/* Help handler running on IST stack to switch back to user stack
+ for scheduling or signal handling. The actual stack switch is done in
+ entry.S */
+asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
+{
+ struct pt_regs *regs = eregs;
+ /* Did already sync */
+ if (eregs == (struct pt_regs *)eregs->sp)
+ ;
+ /* Exception from user space */
+ else if (user_mode(eregs))
+ regs = task_pt_regs(current);
+ /* Exception from kernel and interrupts are enabled. Move to
+ kernel process stack. */
+ else if (eregs->flags & X86_EFLAGS_IF)
+ regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
+ if (eregs != regs)
+ *regs = *eregs;
+ return regs;
}
#endif
* about restoring all the debug state, and ptrace doesn't have to
* find every occurrence of the TF bit that could be saved away even
* by user code)
+ *
+ * May run on IST stack.
*/
-void __kprobes do_debug(struct pt_regs *regs, long error_code)
+dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk = current;
- unsigned int condition;
+ unsigned long condition;
int si_code;
- trace_hardirqs_fixup();
-
get_debugreg(condition, 6);
/*
if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
SIGTRAP) == NOTIFY_STOP)
return;
+
/* It's safe to allow irq's after DR6 has been saved */
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
+ preempt_conditional_sti(regs);
/* Mask out spurious debug traps due to lazy DR7 setting */
if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
goto clear_dr7;
}
+#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK)
goto debug_vm86;
+#endif
/* Save debug status register where ptrace can see it */
tsk->thread.debugreg6 = condition;
* kernel space (but re-enable TF when returning to user mode).
*/
if (condition & DR_STEP) {
- /*
- * We already checked v86 mode above, so we can
- * check for kernel mode by just checking the CPL
- * of CS.
- */
if (!user_mode(regs))
goto clear_TF_reenable;
}
- si_code = get_si_code((unsigned long)condition);
+ si_code = get_si_code(condition);
/* Ok, finally something we can handle */
send_sigtrap(tsk, regs, error_code, si_code);
*/
clear_dr7:
set_debugreg(0, 7);
+ preempt_conditional_cli(regs);
return;
+#ifdef CONFIG_X86_32
debug_vm86:
handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
+ preempt_conditional_cli(regs);
return;
+#endif
clear_TF_reenable:
set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
regs->flags &= ~X86_EFLAGS_TF;
+ preempt_conditional_cli(regs);
return;
}
+#ifdef CONFIG_X86_64
+static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
+{
+ if (fixup_exception(regs))
+ return 1;
+
+ notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
+ /* Illegal floating point operation in the kernel */
+ current->thread.trap_no = trapnr;
+ die(str, regs, 0);
+ return 0;
+}
+#endif
+
/*
* Note that we play around with the 'TS' bit in an attempt to get
* the correct behaviour even in the presence of the asynchronous
swd = get_fpu_swd(task);
switch (swd & ~cwd & 0x3f) {
case 0x000: /* No unmasked exception */
+#ifdef CONFIG_X86_32
return;
+#endif
default: /* Multiple exceptions */
break;
case 0x001: /* Invalid Op */
force_sig_info(SIGFPE, &info, task);
}
-void do_coprocessor_error(struct pt_regs *regs, long error_code)
+dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
ignore_fpu_irq = 1;
+#else
+ if (!user_mode(regs) &&
+ kernel_math_error(regs, "kernel x87 math error", 16))
+ return;
+#endif
+
math_error((void __user *)regs->ip);
}
force_sig_info(SIGFPE, &info, task);
}
-void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
+dotraplinkage void
+do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
if (cpu_has_xmm) {
/* Handle SIMD FPU exceptions on PIII+ processors. */
ignore_fpu_irq = 1;
current->thread.error_code = error_code;
die_if_kernel("cache flush denied", regs, error_code);
force_sig(SIGSEGV, current);
+#else
+ if (!user_mode(regs) &&
+ kernel_math_error(regs, "kernel simd math error", 19))
+ return;
+ simd_math_error((void __user *)regs->ip);
+#endif
}
-void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
+dotraplinkage void
+do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
#if 0
/* No need to warn about this any longer. */
printk(KERN_INFO "Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
#endif
}
+#ifdef CONFIG_X86_32
unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
{
struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
return new_kesp;
}
+#else
+asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
+{
+}
+
+asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
+{
+}
+#endif
/*
* 'math_state_restore()' saves the current math information in the
}
clts(); /* Allow maths ops (or we recurse) */
+#ifdef CONFIG_X86_32
restore_fpu(tsk);
+#else
+ /*
+ * Paranoid restore. send a SIGSEGV if we fail to restore the state.
+ */
+ if (unlikely(restore_fpu_checking(tsk))) {
+ stts();
+ force_sig(SIGSEGV, tsk);
+ return;
+ }
+#endif
thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
tsk->fpu_counter++;
}
EXPORT_SYMBOL_GPL(math_state_restore);
#ifndef CONFIG_MATH_EMULATION
-
asmlinkage void math_emulate(long arg)
{
printk(KERN_EMERG
force_sig(SIGFPE, current);
schedule();
}
-
#endif /* CONFIG_MATH_EMULATION */
+dotraplinkage void __kprobes
+do_device_not_available(struct pt_regs *regs, long error)
+{
+#ifdef CONFIG_X86_32
+ if (read_cr0() & X86_CR0_EM) {
+ conditional_sti(regs);
+ math_emulate(0);
+ } else {
+ math_state_restore(); /* interrupts still off */
+ conditional_sti(regs);
+ }
+#else
+ math_state_restore();
+#endif
+}
+
+#ifdef CONFIG_X86_32
+#ifdef CONFIG_X86_MCE
+dotraplinkage void __kprobes do_machine_check(struct pt_regs *regs, long error)
+{
+ conditional_sti(regs);
+ machine_check_vector(regs, error);
+}
+#endif
+
+dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
+{
+ siginfo_t info;
+ local_irq_enable();
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_BADSTK;
+ info.si_addr = 0;
+ if (notify_die(DIE_TRAP, "iret exception",
+ regs, error_code, 32, SIGILL) == NOTIFY_STOP)
+ return;
+ do_trap(32, SIGILL, "iret exception", regs, error_code, &info);
+}
+#endif
+
void __init trap_init(void)
{
+#ifdef CONFIG_X86_32
int i;
+#endif
#ifdef CONFIG_EISA
void __iomem *p = early_ioremap(0x0FFFD9, 4);
early_iounmap(p, 4);
#endif
- set_trap_gate(0, ÷_error);
- set_intr_gate(1, &debug);
- set_intr_gate(2, &nmi);
- set_system_intr_gate(3, &int3); /* int3 can be called from all */
- set_system_gate(4, &overflow); /* int4 can be called from all */
- set_trap_gate(5, &bounds);
- set_trap_gate(6, &invalid_op);
- set_trap_gate(7, &device_not_available);
+ set_intr_gate(0, ÷_error);
+ set_intr_gate_ist(1, &debug, DEBUG_STACK);
+ set_intr_gate_ist(2, &nmi, NMI_STACK);
+ /* int3 can be called from all */
+ set_system_intr_gate_ist(3, &int3, DEBUG_STACK);
+ /* int4 can be called from all */
+ set_system_intr_gate(4, &overflow);
+ set_intr_gate(5, &bounds);
+ set_intr_gate(6, &invalid_op);
+ set_intr_gate(7, &device_not_available);
+#ifdef CONFIG_X86_32
set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
- set_trap_gate(9, &coprocessor_segment_overrun);
- set_trap_gate(10, &invalid_TSS);
- set_trap_gate(11, &segment_not_present);
- set_trap_gate(12, &stack_segment);
- set_trap_gate(13, &general_protection);
+#else
+ set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
+#endif
+ set_intr_gate(9, &coprocessor_segment_overrun);
+ set_intr_gate(10, &invalid_TSS);
+ set_intr_gate(11, &segment_not_present);
+ set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
+ set_intr_gate(13, &general_protection);
set_intr_gate(14, &page_fault);
- set_trap_gate(15, &spurious_interrupt_bug);
- set_trap_gate(16, &coprocessor_error);
- set_trap_gate(17, &alignment_check);
+ set_intr_gate(15, &spurious_interrupt_bug);
+ set_intr_gate(16, &coprocessor_error);
+ set_intr_gate(17, &alignment_check);
#ifdef CONFIG_X86_MCE
- set_trap_gate(18, &machine_check);
+ set_intr_gate_ist(18, &machine_check, MCE_STACK);
#endif
- set_trap_gate(19, &simd_coprocessor_error);
+ set_intr_gate(19, &simd_coprocessor_error);
+#ifdef CONFIG_IA32_EMULATION
+ set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
+#endif
+
+#ifdef CONFIG_X86_32
if (cpu_has_fxsr) {
printk(KERN_INFO "Enabling fast FPU save and restore... ");
set_in_cr4(X86_CR4_OSFXSR);
printk("done.\n");
}
- set_system_gate(SYSCALL_VECTOR, &system_call);
+ set_system_trap_gate(SYSCALL_VECTOR, &system_call);
/* Reserve all the builtin and the syscall vector: */
for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
set_bit(i, used_vectors);
set_bit(SYSCALL_VECTOR, used_vectors);
-
+#endif
/*
* Should be a barrier for any external CPU state:
*/
cpu_init();
+#ifdef CONFIG_X86_32
trap_init_hook();
+#endif
}
-
-static int __init kstack_setup(char *s)
-{
- kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-
- return 1;
-}
-__setup("kstack=", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
- code_bytes = simple_strtoul(s, NULL, 0);
- if (code_bytes > 8192)
- code_bytes = 8192;
-
- return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
+++ /dev/null
-/*
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- *
- * Pentium III FXSR, SSE support
- * Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
- */
-#include <linux/moduleparam.h>
-#include <linux/interrupt.h>
-#include <linux/kallsyms.h>
-#include <linux/spinlock.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/utsname.h>
-#include <linux/kdebug.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/string.h>
-#include <linux/unwind.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/kexec.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-#include <linux/bug.h>
-#include <linux/nmi.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/io.h>
-
-#if defined(CONFIG_EDAC)
-#include <linux/edac.h>
-#endif
-
-#include <asm/stacktrace.h>
-#include <asm/processor.h>
-#include <asm/debugreg.h>
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <asm/unwind.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-#include <asm/pgalloc.h>
-#include <asm/proto.h>
-#include <asm/pda.h>
-#include <asm/traps.h>
-
-#include <mach_traps.h>
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 12;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-static inline void conditional_sti(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
-static inline void preempt_conditional_sti(struct pt_regs *regs)
-{
- inc_preempt_count();
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
-static inline void preempt_conditional_cli(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_disable();
- /* Make sure to not schedule here because we could be running
- on an exception stack. */
- dec_preempt_count();
-}
-
-void printk_address(unsigned long address, int reliable)
-{
- printk(" [<%016lx>] %s%pS\n",
- address, reliable ? "" : "? ", (void *) address);
-}
-
-static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
- unsigned *usedp, char **idp)
-{
- static char ids[][8] = {
- [DEBUG_STACK - 1] = "#DB",
- [NMI_STACK - 1] = "NMI",
- [DOUBLEFAULT_STACK - 1] = "#DF",
- [STACKFAULT_STACK - 1] = "#SS",
- [MCE_STACK - 1] = "#MC",
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- [N_EXCEPTION_STACKS ...
- N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
-#endif
- };
- unsigned k;
-
- /*
- * Iterate over all exception stacks, and figure out whether
- * 'stack' is in one of them:
- */
- for (k = 0; k < N_EXCEPTION_STACKS; k++) {
- unsigned long end = per_cpu(orig_ist, cpu).ist[k];
- /*
- * Is 'stack' above this exception frame's end?
- * If yes then skip to the next frame.
- */
- if (stack >= end)
- continue;
- /*
- * Is 'stack' above this exception frame's start address?
- * If yes then we found the right frame.
- */
- if (stack >= end - EXCEPTION_STKSZ) {
- /*
- * Make sure we only iterate through an exception
- * stack once. If it comes up for the second time
- * then there's something wrong going on - just
- * break out and return NULL:
- */
- if (*usedp & (1U << k))
- break;
- *usedp |= 1U << k;
- *idp = ids[k];
- return (unsigned long *)end;
- }
- /*
- * If this is a debug stack, and if it has a larger size than
- * the usual exception stacks, then 'stack' might still
- * be within the lower portion of the debug stack:
- */
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
- unsigned j = N_EXCEPTION_STACKS - 1;
-
- /*
- * Black magic. A large debug stack is composed of
- * multiple exception stack entries, which we
- * iterate through now. Dont look:
- */
- do {
- ++j;
- end -= EXCEPTION_STKSZ;
- ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
- } while (stack < end - EXCEPTION_STKSZ);
- if (*usedp & (1U << j))
- break;
- *usedp |= 1U << j;
- *idp = ids[j];
- return (unsigned long *)end;
- }
-#endif
- }
- return NULL;
-}
-
-/*
- * x86-64 can have up to three kernel stacks:
- * process stack
- * interrupt stack
- * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
- */
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size, void *end)
-{
- void *t = tinfo;
- if (end) {
- if (p < end && p >= (end-THREAD_SIZE))
- return 1;
- else
- return 0;
- }
- return p > t && p < t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data,
- unsigned long *end)
-{
- struct stack_frame *frame = (struct stack_frame *)bp;
-
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
- unsigned long addr;
-
- addr = *stack;
- if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 8) {
- ops->address(data, addr, 1);
- frame = frame->next_frame;
- bp = (unsigned long) frame;
- } else {
- ops->address(data, addr, bp == 0);
- }
- }
- stack++;
- }
- return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- const unsigned cpu = get_cpu();
- unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
- unsigned used = 0;
- struct thread_info *tinfo;
-
- if (!task)
- task = current;
-
- if (!stack) {
- unsigned long dummy;
- stack = &dummy;
- if (task && task != current)
- stack = (unsigned long *)task->thread.sp;
- }
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp) {
- if (task == current) {
- /* Grab bp right from our regs */
- asm("movq %%rbp, %0" : "=r" (bp) : );
- } else {
- /* bp is the last reg pushed by switch_to */
- bp = *(unsigned long *) task->thread.sp;
- }
- }
-#endif
-
- /*
- * Print function call entries in all stacks, starting at the
- * current stack address. If the stacks consist of nested
- * exceptions
- */
- tinfo = task_thread_info(task);
- for (;;) {
- char *id;
- unsigned long *estack_end;
- estack_end = in_exception_stack(cpu, (unsigned long)stack,
- &used, &id);
-
- if (estack_end) {
- if (ops->stack(data, id) < 0)
- break;
-
- bp = print_context_stack(tinfo, stack, bp, ops,
- data, estack_end);
- ops->stack(data, "<EOE>");
- /*
- * We link to the next stack via the
- * second-to-last pointer (index -2 to end) in the
- * exception stack:
- */
- stack = (unsigned long *) estack_end[-2];
- continue;
- }
- if (irqstack_end) {
- unsigned long *irqstack;
- irqstack = irqstack_end -
- (IRQSTACKSIZE - 64) / sizeof(*irqstack);
-
- if (stack >= irqstack && stack < irqstack_end) {
- if (ops->stack(data, "IRQ") < 0)
- break;
- bp = print_context_stack(tinfo, stack, bp,
- ops, data, irqstack_end);
- /*
- * We link to the next stack (which would be
- * the process stack normally) the last
- * pointer (index -1 to end) in the IRQ stack:
- */
- stack = (unsigned long *) (irqstack_end[-1]);
- irqstack_end = NULL;
- ops->stack(data, "EOI");
- continue;
- }
- }
- break;
- }
-
- /*
- * This handles the process stack:
- */
- bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
- put_cpu();
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
- print_symbol(msg, symbol);
- printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
- printk("%s\n", msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
- printk(" <%s> ", name);
- return 0;
-}
-
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
- touch_nmi_watchdog();
- printk_address(addr, reliable);
-}
-
-static const struct stacktrace_ops print_trace_ops = {
- .warning = print_trace_warning,
- .warning_symbol = print_trace_warning_symbol,
- .stack = print_trace_stack,
- .address = print_trace_address,
-};
-
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl)
-{
- printk("Call Trace:\n");
- dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
-}
-
-void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp)
-{
- show_trace_log_lvl(task, regs, stack, bp, "");
-}
-
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
-{
- unsigned long *stack;
- int i;
- const int cpu = smp_processor_id();
- unsigned long *irqstack_end =
- (unsigned long *) (cpu_pda(cpu)->irqstackptr);
- unsigned long *irqstack =
- (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
-
- /*
- * debugging aid: "show_stack(NULL, NULL);" prints the
- * back trace for this cpu.
- */
-
- if (sp == NULL) {
- if (task)
- sp = (unsigned long *)task->thread.sp;
- else
- sp = (unsigned long *)&sp;
- }
-
- stack = sp;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (stack >= irqstack && stack <= irqstack_end) {
- if (stack == irqstack_end) {
- stack = (unsigned long *) (irqstack_end[-1]);
- printk(" <EOI> ");
- }
- } else {
- if (((long) stack & (THREAD_SIZE-1)) == 0)
- break;
- }
- if (i && ((i % 4) == 0))
- printk("\n");
- printk(" %016lx", *stack++);
- touch_nmi_watchdog();
- }
- printk("\n");
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *sp)
-{
- show_stack_log_lvl(task, NULL, sp, 0, "");
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
- unsigned long bp = 0;
- unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp)
- asm("movq %%rbp, %0" : "=r" (bp) : );
-#endif
-
- printk("Pid: %d, comm: %.20s %s %s %.*s\n",
- current->pid, current->comm, print_tainted(),
- init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
- show_trace(NULL, NULL, &stack, bp);
-}
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
- unsigned long sp;
- const int cpu = smp_processor_id();
- struct task_struct *cur = cpu_pda(cpu)->pcurrent;
-
- sp = regs->sp;
- printk("CPU %d ", cpu);
- __show_regs(regs);
- printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
- cur->comm, cur->pid, task_thread_info(cur), cur);
-
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk("Stack: ");
- show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
- regs->bp, "");
-
- printk(KERN_EMERG "Code: ");
-
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at RIP */
- ip = (u8 *)regs->ip;
- code_len = code_len - code_prologue + 1;
- }
- for (i = 0; i < code_len; i++, ip++) {
- if (ip < (u8 *)PAGE_OFFSET ||
- probe_kernel_address(ip, c)) {
- printk(" Bad RIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk("<%02x> ", c);
- else
- printk("%02x ", c);
- }
- }
- printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
- return 0;
-
- return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
- int cpu;
- unsigned long flags;
-
- oops_enter();
-
- /* racy, but better than risking deadlock. */
- raw_local_irq_save(flags);
- cpu = smp_processor_id();
- if (!__raw_spin_trylock(&die_lock)) {
- if (cpu == die_owner)
- /* nested oops. should stop eventually */;
- else
- __raw_spin_lock(&die_lock);
- }
- die_nest_count++;
- die_owner = cpu;
- console_verbose();
- bust_spinlocks(1);
- return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
- die_owner = -1;
- bust_spinlocks(0);
- die_nest_count--;
- if (!die_nest_count)
- /* Nest count reaches zero, release the lock. */
- __raw_spin_unlock(&die_lock);
- raw_local_irq_restore(flags);
- if (!regs) {
- oops_exit();
- return;
- }
- if (panic_on_oops)
- panic("Fatal exception");
- oops_exit();
- do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
- printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
- printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
- printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
-#endif
- printk("\n");
- if (notify_die(DIE_OOPS, str, regs, err,
- current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
- return 1;
-
- show_registers(regs);
- add_taint(TAINT_DIE);
- /* Executive summary in case the oops scrolled away */
- printk(KERN_ALERT "RIP ");
- printk_address(regs->ip, 1);
- printk(" RSP <%016lx>\n", regs->sp);
- if (kexec_should_crash(current))
- crash_kexec(regs);
- return 0;
-}
-
-void die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned long flags = oops_begin();
-
- if (!user_mode(regs))
- report_bug(regs->ip, regs);
-
- if (__die(str, regs, err))
- regs = NULL;
- oops_end(flags, regs, SIGSEGV);
-}
-
-notrace __kprobes void
-die_nmi(char *str, struct pt_regs *regs, int do_panic)
-{
- unsigned long flags;
-
- if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- flags = oops_begin();
- /*
- * We are in trouble anyway, lets at least try
- * to get a message out.
- */
- printk(KERN_EMERG "%s", str);
- printk(" on CPU%d, ip %08lx, registers:\n",
- smp_processor_id(), regs->ip);
- show_registers(regs);
- if (kexec_should_crash(current))
- crash_kexec(regs);
- if (do_panic || panic_on_oops)
- panic("Non maskable interrupt");
- oops_end(flags, NULL, SIGBUS);
- nmi_exit();
- local_irq_enable();
- do_exit(SIGBUS);
-}
-
-static void __kprobes
-do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
- long error_code, siginfo_t *info)
-{
- struct task_struct *tsk = current;
-
- if (!user_mode(regs))
- goto kernel_trap;
-
- /*
- * We want error_code and trap_no set for userspace faults and
- * kernelspace faults which result in die(), but not
- * kernelspace faults which are fixed up. die() gives the
- * process no chance to handle the signal and notice the
- * kernel fault information, so that won't result in polluting
- * the information about previously queued, but not yet
- * delivered, faults. See also do_general_protection below.
- */
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
-
- if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
- printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
- tsk->comm, tsk->pid, str,
- regs->ip, regs->sp, error_code);
- print_vma_addr(" in ", regs->ip);
- printk("\n");
- }
-
- if (info)
- force_sig_info(signr, info, tsk);
- else
- force_sig(signr, tsk);
- return;
-
-kernel_trap:
- if (!fixup_exception(regs)) {
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
- die(str, regs, error_code);
- }
- return;
-}
-
-#define DO_ERROR(trapnr, signr, str, name) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- conditional_sti(regs); \
- do_trap(trapnr, signr, str, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- siginfo_t info; \
- info.si_signo = signr; \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void __user *)siaddr; \
- trace_hardirqs_fixup(); \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- conditional_sti(regs); \
- do_trap(trapnr, signr, str, regs, error_code, &info); \
-}
-
-DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-DO_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
-DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
-DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
-
-/* Runs on IST stack */
-asmlinkage void do_stack_segment(struct pt_regs *regs, long error_code)
-{
- if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
- 12, SIGBUS) == NOTIFY_STOP)
- return;
- preempt_conditional_sti(regs);
- do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
- preempt_conditional_cli(regs);
-}
-
-asmlinkage void do_double_fault(struct pt_regs *regs, long error_code)
-{
- static const char str[] = "double fault";
- struct task_struct *tsk = current;
-
- /* Return not checked because double check cannot be ignored */
- notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 8;
-
- /* This is always a kernel trap and never fixable (and thus must
- never return). */
- for (;;)
- die(str, regs, error_code);
-}
-
-asmlinkage void __kprobes
-do_general_protection(struct pt_regs *regs, long error_code)
-{
- struct task_struct *tsk;
-
- conditional_sti(regs);
-
- tsk = current;
- if (!user_mode(regs))
- goto gp_in_kernel;
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
-
- if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
- printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] general protection ip:%lx sp:%lx error:%lx",
- tsk->comm, tsk->pid,
- regs->ip, regs->sp, error_code);
- print_vma_addr(" in ", regs->ip);
- printk("\n");
- }
-
- force_sig(SIGSEGV, tsk);
- return;
-
-gp_in_kernel:
- if (fixup_exception(regs))
- return;
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
- if (notify_die(DIE_GPF, "general protection fault", regs,
- error_code, 13, SIGSEGV) == NOTIFY_STOP)
- return;
- die("general protection fault", regs, error_code);
-}
-
-static notrace __kprobes void
-mem_parity_error(unsigned char reason, struct pt_regs *regs)
-{
- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
- reason);
- printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
-
-#if defined(CONFIG_EDAC)
- if (edac_handler_set()) {
- edac_atomic_assert_error();
- return;
- }
-#endif
-
- if (panic_on_unrecovered_nmi)
- panic("NMI: Not continuing");
-
- printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-
- /* Clear and disable the memory parity error line. */
- reason = (reason & 0xf) | 4;
- outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-io_check_error(unsigned char reason, struct pt_regs *regs)
-{
- printk("NMI: IOCK error (debug interrupt?)\n");
- show_registers(regs);
-
- /* Re-enable the IOCK line, wait for a few seconds */
- reason = (reason & 0xf) | 8;
- outb(reason, 0x61);
- mdelay(2000);
- reason &= ~8;
- outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
-{
- if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
- NOTIFY_STOP)
- return;
- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
- reason);
- printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
-
- if (panic_on_unrecovered_nmi)
- panic("NMI: Not continuing");
-
- printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-}
-
-/* Runs on IST stack. This code must keep interrupts off all the time.
- Nested NMIs are prevented by the CPU. */
-asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
-{
- unsigned char reason = 0;
- int cpu;
-
- cpu = smp_processor_id();
-
- /* Only the BSP gets external NMIs from the system. */
- if (!cpu)
- reason = get_nmi_reason();
-
- if (!(reason & 0xc0)) {
- if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
- == NOTIFY_STOP)
- return;
- /*
- * Ok, so this is none of the documented NMI sources,
- * so it must be the NMI watchdog.
- */
- if (nmi_watchdog_tick(regs, reason))
- return;
- if (!do_nmi_callback(regs, cpu))
- unknown_nmi_error(reason, regs);
-
- return;
- }
- if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- /* AK: following checks seem to be broken on modern chipsets. FIXME */
- if (reason & 0x80)
- mem_parity_error(reason, regs);
- if (reason & 0x40)
- io_check_error(reason, regs);
-}
-
-asmlinkage notrace __kprobes void
-do_nmi(struct pt_regs *regs, long error_code)
-{
- nmi_enter();
-
- add_pda(__nmi_count, 1);
-
- if (!ignore_nmis)
- default_do_nmi(regs);
-
- nmi_exit();
-}
-
-void stop_nmi(void)
-{
- acpi_nmi_disable();
- ignore_nmis++;
-}
-
-void restart_nmi(void)
-{
- ignore_nmis--;
- acpi_nmi_enable();
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
-{
- trace_hardirqs_fixup();
-
- if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
- == NOTIFY_STOP)
- return;
-
- preempt_conditional_sti(regs);
- do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
- preempt_conditional_cli(regs);
-}
-
-/* Help handler running on IST stack to switch back to user stack
- for scheduling or signal handling. The actual stack switch is done in
- entry.S */
-asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
-{
- struct pt_regs *regs = eregs;
- /* Did already sync */
- if (eregs == (struct pt_regs *)eregs->sp)
- ;
- /* Exception from user space */
- else if (user_mode(eregs))
- regs = task_pt_regs(current);
- /* Exception from kernel and interrupts are enabled. Move to
- kernel process stack. */
- else if (eregs->flags & X86_EFLAGS_IF)
- regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
- if (eregs != regs)
- *regs = *eregs;
- return regs;
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_debug(struct pt_regs *regs,
- unsigned long error_code)
-{
- struct task_struct *tsk = current;
- unsigned long condition;
- siginfo_t info;
-
- trace_hardirqs_fixup();
-
- get_debugreg(condition, 6);
-
- /*
- * The processor cleared BTF, so don't mark that we need it set.
- */
- clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
- tsk->thread.debugctlmsr = 0;
-
- if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
- SIGTRAP) == NOTIFY_STOP)
- return;
-
- preempt_conditional_sti(regs);
-
- /* Mask out spurious debug traps due to lazy DR7 setting */
- if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
- if (!tsk->thread.debugreg7)
- goto clear_dr7;
- }
-
- tsk->thread.debugreg6 = condition;
-
- /*
- * Single-stepping through TF: make sure we ignore any events in
- * kernel space (but re-enable TF when returning to user mode).
- */
- if (condition & DR_STEP) {
- if (!user_mode(regs))
- goto clear_TF_reenable;
- }
-
- /* Ok, finally something we can handle */
- tsk->thread.trap_no = 1;
- tsk->thread.error_code = error_code;
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = get_si_code(condition);
- info.si_addr = user_mode(regs) ? (void __user *)regs->ip : NULL;
- force_sig_info(SIGTRAP, &info, tsk);
-
-clear_dr7:
- set_debugreg(0, 7);
- preempt_conditional_cli(regs);
- return;
-
-clear_TF_reenable:
- set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
- regs->flags &= ~X86_EFLAGS_TF;
- preempt_conditional_cli(regs);
- return;
-}
-
-static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
-{
- if (fixup_exception(regs))
- return 1;
-
- notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
- /* Illegal floating point operation in the kernel */
- current->thread.trap_no = trapnr;
- die(str, regs, 0);
- return 0;
-}
-
-/*
- * Note that we play around with the 'TS' bit in an attempt to get
- * the correct behaviour even in the presence of the asynchronous
- * IRQ13 behaviour
- */
-asmlinkage void do_coprocessor_error(struct pt_regs *regs)
-{
- void __user *ip = (void __user *)(regs->ip);
- struct task_struct *task;
- siginfo_t info;
- unsigned short cwd, swd;
-
- conditional_sti(regs);
- if (!user_mode(regs) &&
- kernel_math_error(regs, "kernel x87 math error", 16))
- return;
-
- /*
- * Save the info for the exception handler and clear the error.
- */
- task = current;
- save_init_fpu(task);
- task->thread.trap_no = 16;
- task->thread.error_code = 0;
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = ip;
- /*
- * (~cwd & swd) will mask out exceptions that are not set to unmasked
- * status. 0x3f is the exception bits in these regs, 0x200 is the
- * C1 reg you need in case of a stack fault, 0x040 is the stack
- * fault bit. We should only be taking one exception at a time,
- * so if this combination doesn't produce any single exception,
- * then we have a bad program that isn't synchronizing its FPU usage
- * and it will suffer the consequences since we won't be able to
- * fully reproduce the context of the exception
- */
- cwd = get_fpu_cwd(task);
- swd = get_fpu_swd(task);
- switch (swd & ~cwd & 0x3f) {
- case 0x000: /* No unmasked exception */
- default: /* Multiple exceptions */
- break;
- case 0x001: /* Invalid Op */
- /*
- * swd & 0x240 == 0x040: Stack Underflow
- * swd & 0x240 == 0x240: Stack Overflow
- * User must clear the SF bit (0x40) if set
- */
- info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
- info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
- info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
- info.si_code = FPE_FLTRES;
- break;
- }
- force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void bad_intr(void)
-{
- printk("bad interrupt");
-}
-
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
-{
- void __user *ip = (void __user *)(regs->ip);
- struct task_struct *task;
- siginfo_t info;
- unsigned short mxcsr;
-
- conditional_sti(regs);
- if (!user_mode(regs) &&
- kernel_math_error(regs, "kernel simd math error", 19))
- return;
-
- /*
- * Save the info for the exception handler and clear the error.
- */
- task = current;
- save_init_fpu(task);
- task->thread.trap_no = 19;
- task->thread.error_code = 0;
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = ip;
- /*
- * The SIMD FPU exceptions are handled a little differently, as there
- * is only a single status/control register. Thus, to determine which
- * unmasked exception was caught we must mask the exception mask bits
- * at 0x1f80, and then use these to mask the exception bits at 0x3f.
- */
- mxcsr = get_fpu_mxcsr(task);
- switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
- case 0x000:
- default:
- break;
- case 0x001: /* Invalid Op */
- info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
- info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
- info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
- info.si_code = FPE_FLTRES;
- break;
- }
- force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *regs)
-{
-}
-
-asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
-{
-}
-
-asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
-{
-}
-
-/*
- * 'math_state_restore()' saves the current math information in the
- * old math state array, and gets the new ones from the current task
- *
- * Careful.. There are problems with IBM-designed IRQ13 behaviour.
- * Don't touch unless you *really* know how it works.
- */
-asmlinkage void math_state_restore(void)
-{
- struct task_struct *me = current;
-
- if (!used_math()) {
- local_irq_enable();
- /*
- * does a slab alloc which can sleep
- */
- if (init_fpu(me)) {
- /*
- * ran out of memory!
- */
- do_group_exit(SIGKILL);
- return;
- }
- local_irq_disable();
- }
-
- clts(); /* Allow maths ops (or we recurse) */
- /*
- * Paranoid restore. send a SIGSEGV if we fail to restore the state.
- */
- if (unlikely(restore_fpu_checking(me))) {
- stts();
- force_sig(SIGSEGV, me);
- return;
- }
- task_thread_info(me)->status |= TS_USEDFPU;
- me->fpu_counter++;
-}
-EXPORT_SYMBOL_GPL(math_state_restore);
-
-void __init trap_init(void)
-{
- set_intr_gate(0, ÷_error);
- set_intr_gate_ist(1, &debug, DEBUG_STACK);
- set_intr_gate_ist(2, &nmi, NMI_STACK);
- /* int3 can be called from all */
- set_system_gate_ist(3, &int3, DEBUG_STACK);
- /* int4 can be called from all */
- set_system_gate(4, &overflow);
- set_intr_gate(5, &bounds);
- set_intr_gate(6, &invalid_op);
- set_intr_gate(7, &device_not_available);
- set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
- set_intr_gate(9, &coprocessor_segment_overrun);
- set_intr_gate(10, &invalid_TSS);
- set_intr_gate(11, &segment_not_present);
- set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
- set_intr_gate(13, &general_protection);
- set_intr_gate(14, &page_fault);
- set_intr_gate(15, &spurious_interrupt_bug);
- set_intr_gate(16, &coprocessor_error);
- set_intr_gate(17, &alignment_check);
-#ifdef CONFIG_X86_MCE
- set_intr_gate_ist(18, &machine_check, MCE_STACK);
-#endif
- set_intr_gate(19, &simd_coprocessor_error);
-
-#ifdef CONFIG_IA32_EMULATION
- set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
-#endif
- /*
- * Should be a barrier for any external CPU state:
- */
- cpu_init();
-}
-
-static int __init oops_setup(char *s)
-{
- if (!s)
- return -EINVAL;
- if (!strcmp(s, "panic"))
- panic_on_oops = 1;
- return 0;
-}
-early_param("oops", oops_setup);
-
-static int __init kstack_setup(char *s)
-{
- if (!s)
- return -EINVAL;
- kstack_depth_to_print = simple_strtoul(s, NULL, 0);
- return 0;
-}
-early_param("kstack", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
- code_bytes = simple_strtoul(s, NULL, 0);
- if (code_bytes > 8192)
- code_bytes = 8192;
-
- return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
/* Hook from generic ACPI tables.c */
static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- unsigned long oem_addr;
+ unsigned long oem_addr = 0;
+ int check_dsdt;
+ int ret = 0;
+
+ /* check dsdt at first to avoid clear fix_map for oem_addr */
+ check_dsdt = es7000_check_dsdt();
+
if (!find_unisys_acpi_oem_table(&oem_addr)) {
- if (es7000_check_dsdt())
- return parse_unisys_oem((char *)oem_addr);
+ if (check_dsdt)
+ ret = parse_unisys_oem((char *)oem_addr);
else {
setup_unisys();
- return 1;
+ ret = 1;
}
+ /*
+ * we need to unmap it
+ */
+ unmap_unisys_acpi_oem_table(oem_addr);
}
- return 0;
+ return ret;
}
#else
static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
mmiotrace-y := pf_in.o mmio-mod.o
obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
-ifeq ($(CONFIG_X86_32),y)
-obj-$(CONFIG_NUMA) += discontig_32.o
-else
-obj-$(CONFIG_NUMA) += numa_64.o
+obj-$(CONFIG_NUMA) += numa_$(BITS).o
obj-$(CONFIG_K8_NUMA) += k8topology_64.o
-endif
obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
obj-$(CONFIG_MEMTEST) += memtest.o
unsigned long flags;
#endif
- /*
- * We can fault from pretty much anywhere, with unknown IRQ state.
- */
- trace_hardirqs_fixup();
-
tsk = current;
mm = tsk->mm;
prefetchw(&mm->mmap_sem);
pte_t pte = gup_get_pte(ptep);
struct page *page;
- if ((pte_val(pte) & (mask | _PAGE_SPECIAL)) != mask) {
+ if ((pte_flags(pte) & (mask | _PAGE_SPECIAL)) != mask) {
pte_unmap(ptep);
return 0;
}
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
int nx_enabled;
-pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
+pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP);
EXPORT_SYMBOL_GPL(__supported_pte_mask);
#ifdef CONFIG_X86_PAE
int after_bootmem;
-unsigned long __supported_pte_mask __read_mostly = ~0UL;
+pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
EXPORT_SYMBOL_GPL(__supported_pte_mask);
static int do_not_nx __cpuinitdata;
}
pte = pte_offset_kernel(pmd, vaddr);
- if (!pte_none(*pte) && pte_val(new_pte) &&
- pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
- pte_ERROR(*pte);
set_pte(pte, new_pte);
/*
if (pfn >= table_top)
panic("alloc_low_page: ran out of memory");
- adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
+ adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
memset(adr, 0, PAGE_SIZE);
*phys = pfn * PAGE_SIZE;
return adr;
old_start = mr[i].start;
memmove(&mr[i], &mr[i+1],
(nr_range - 1 - i) * sizeof (struct map_range));
- mr[i].start = old_start;
+ mr[i--].start = old_start;
nr_range--;
}
}
EXPORT_SYMBOL(__phys_addr);
+bool __virt_addr_valid(unsigned long x)
+{
+ if (x >= __START_KERNEL_map) {
+ x -= __START_KERNEL_map;
+ if (x >= KERNEL_IMAGE_SIZE)
+ return false;
+ x += phys_base;
+ } else {
+ if (x < PAGE_OFFSET)
+ return false;
+ x -= PAGE_OFFSET;
+ if (system_state == SYSTEM_BOOTING ?
+ x > MAXMEM : !phys_addr_valid(x)) {
+ return false;
+ }
+ }
+
+ return pfn_valid(x >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(__virt_addr_valid);
+
#else
static inline int phys_addr_valid(unsigned long addr)
unsigned long __phys_addr(unsigned long x)
{
/* VMALLOC_* aren't constants; not available at the boot time */
- VIRTUAL_BUG_ON(x < PAGE_OFFSET || (system_state != SYSTEM_BOOTING &&
- is_vmalloc_addr((void *)x)));
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+ VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
+ is_vmalloc_addr((void *) x));
return x - PAGE_OFFSET;
}
EXPORT_SYMBOL(__phys_addr);
#endif
+bool __virt_addr_valid(unsigned long x)
+{
+ if (x < PAGE_OFFSET)
+ return false;
+ if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
+ return false;
+ return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(__virt_addr_valid);
+
#endif
int page_is_ram(unsigned long pagenr)
switch (prot_val) {
case _PAGE_CACHE_UC:
default:
- prot = PAGE_KERNEL_NOCACHE;
+ prot = PAGE_KERNEL_IO_NOCACHE;
break;
case _PAGE_CACHE_UC_MINUS:
- prot = PAGE_KERNEL_UC_MINUS;
+ prot = PAGE_KERNEL_IO_UC_MINUS;
break;
case _PAGE_CACHE_WC:
- prot = PAGE_KERNEL_WC;
+ prot = PAGE_KERNEL_IO_WC;
break;
case _PAGE_CACHE_WB:
- prot = PAGE_KERNEL;
+ prot = PAGE_KERNEL_IO;
break;
}
}
static inline void __init early_set_fixmap(enum fixed_addresses idx,
- unsigned long phys)
+ unsigned long phys, pgprot_t prot)
{
if (after_paging_init)
- set_fixmap(idx, phys);
+ __set_fixmap(idx, phys, prot);
else
- __early_set_fixmap(idx, phys, PAGE_KERNEL);
+ __early_set_fixmap(idx, phys, prot);
}
static inline void __init early_clear_fixmap(enum fixed_addresses idx)
__early_set_fixmap(idx, 0, __pgprot(0));
}
-
-static int __initdata early_ioremap_nested;
-
+static void *prev_map[FIX_BTMAPS_SLOTS] __initdata;
+static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
static int __init check_early_ioremap_leak(void)
{
- if (!early_ioremap_nested)
+ int count = 0;
+ int i;
+
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+ if (prev_map[i])
+ count++;
+
+ if (!count)
return 0;
WARN(1, KERN_WARNING
"Debug warning: early ioremap leak of %d areas detected.\n",
- early_ioremap_nested);
+ count);
printk(KERN_WARNING
"please boot with early_ioremap_debug and report the dmesg.\n");
}
late_initcall(check_early_ioremap_leak);
-void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+static void __init *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
{
unsigned long offset, last_addr;
- unsigned int nrpages, nesting;
+ unsigned int nrpages;
enum fixed_addresses idx0, idx;
+ int i, slot;
WARN_ON(system_state != SYSTEM_BOOTING);
- nesting = early_ioremap_nested;
+ slot = -1;
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ if (!prev_map[i]) {
+ slot = i;
+ break;
+ }
+ }
+
+ if (slot < 0) {
+ printk(KERN_INFO "early_iomap(%08lx, %08lx) not found slot\n",
+ phys_addr, size);
+ WARN_ON(1);
+ return NULL;
+ }
+
if (early_ioremap_debug) {
printk(KERN_INFO "early_ioremap(%08lx, %08lx) [%d] => ",
- phys_addr, size, nesting);
+ phys_addr, size, slot);
dump_stack();
}
return NULL;
}
- if (nesting >= FIX_BTMAPS_NESTING) {
- WARN_ON(1);
- return NULL;
- }
- early_ioremap_nested++;
+ prev_size[slot] = size;
/*
* Mappings have to be page-aligned
*/
/*
* Ok, go for it..
*/
- idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+ idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
idx = idx0;
while (nrpages > 0) {
- early_set_fixmap(idx, phys_addr);
+ early_set_fixmap(idx, phys_addr, prot);
phys_addr += PAGE_SIZE;
--idx;
--nrpages;
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
- return (void *) (offset + fix_to_virt(idx0));
+ prev_map[slot] = (void *) (offset + fix_to_virt(idx0));
+ return prev_map[slot];
+}
+
+/* Remap an IO device */
+void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+{
+ return __early_ioremap(phys_addr, size, PAGE_KERNEL_IO);
+}
+
+/* Remap memory */
+void __init *early_memremap(unsigned long phys_addr, unsigned long size)
+{
+ return __early_ioremap(phys_addr, size, PAGE_KERNEL);
}
void __init early_iounmap(void *addr, unsigned long size)
unsigned long offset;
unsigned int nrpages;
enum fixed_addresses idx;
- int nesting;
+ int i, slot;
+
+ slot = -1;
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ if (prev_map[i] == addr) {
+ slot = i;
+ break;
+ }
+ }
- nesting = --early_ioremap_nested;
- if (WARN_ON(nesting < 0))
+ if (slot < 0) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) not found slot\n",
+ addr, size);
+ WARN_ON(1);
+ return;
+ }
+
+ if (prev_size[slot] != size) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) [%d] size not consistent %08lx\n",
+ addr, size, slot, prev_size[slot]);
+ WARN_ON(1);
return;
+ }
if (early_ioremap_debug) {
printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
- size, nesting);
+ size, slot);
dump_stack();
}
offset = virt_addr & ~PAGE_MASK;
nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
- idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+ idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
while (nrpages > 0) {
early_clear_fixmap(idx);
--idx;
--nrpages;
}
+ prev_map[slot] = 0;
}
void __this_fixmap_does_not_exist(void)
return;
}
- if (is_uv_system())
+ if (get_uv_system_type() >= UV_X2APIC)
apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
else
apic_id = pa->apic_id;
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1202, fam10h_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1203, fam10h_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1204, fam10h_pci_cfg_space_size);
+
+/*
+ * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
+ * confusing the PCI engine:
+ */
+static void sb600_disable_hpet_bar(struct pci_dev *dev)
+{
+ u8 val;
+
+ /*
+ * The SB600 and SB700 both share the same device
+ * ID, but the PM register 0x55 does something different
+ * for the SB700, so make sure we are dealing with the
+ * SB600 before touching the bit:
+ */
+
+ pci_read_config_byte(dev, 0x08, &val);
+
+ if (val < 0x2F) {
+ outb(0x55, 0xCD6);
+ val = inb(0xCD7);
+
+ /* Set bit 7 in PM register 0x55 */
+ outb(0x55, 0xCD6);
+ outb(val | 0x80, 0xCD7);
+ }
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
#define HPET_RANGE_SIZE 1024 /* from HPET spec */
+
+/* WARNING -- don't get confused. These macros are never used
+ * to write the (single) counter, and rarely to read it.
+ * They're badly named; to fix, someday.
+ */
#if BITS_PER_LONG == 64
#define write_counter(V, MC) writeq(V, MC)
#define read_counter(MC) readq(MC)
.rating = 250,
.read = read_hpet,
.mask = CLOCKSOURCE_MASK(64),
- .mult = 0, /*to be caluclated*/
+ .mult = 0, /* to be calculated */
.shift = 10,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
/* A lock for concurrent access by app and isr hpet activity. */
static DEFINE_SPINLOCK(hpet_lock);
-/* A lock for concurrent intermodule access to hpet and isr hpet activity. */
-static DEFINE_SPINLOCK(hpet_task_lock);
#define HPET_DEV_NAME (7)
unsigned long hd_irqdata;
wait_queue_head_t hd_waitqueue;
struct fasync_struct *hd_async_queue;
- struct hpet_task *hd_task;
unsigned int hd_flags;
unsigned int hd_irq;
unsigned int hd_hdwirq;
writel(isr, &devp->hd_hpet->hpet_isr);
spin_unlock(&hpet_lock);
- spin_lock(&hpet_task_lock);
- if (devp->hd_task)
- devp->hd_task->ht_func(devp->hd_task->ht_data);
- spin_unlock(&hpet_task_lock);
-
wake_up_interruptible(&devp->hd_waitqueue);
kill_fasync(&devp->hd_async_queue, SIGIO, POLL_IN);
return IRQ_HANDLED;
}
+static void hpet_timer_set_irq(struct hpet_dev *devp)
+{
+ unsigned long v;
+ int irq, gsi;
+ struct hpet_timer __iomem *timer;
+
+ spin_lock_irq(&hpet_lock);
+ if (devp->hd_hdwirq) {
+ spin_unlock_irq(&hpet_lock);
+ return;
+ }
+
+ timer = devp->hd_timer;
+
+ /* we prefer level triggered mode */
+ v = readl(&timer->hpet_config);
+ if (!(v & Tn_INT_TYPE_CNF_MASK)) {
+ v |= Tn_INT_TYPE_CNF_MASK;
+ writel(v, &timer->hpet_config);
+ }
+ spin_unlock_irq(&hpet_lock);
+
+ v = (readq(&timer->hpet_config) & Tn_INT_ROUTE_CAP_MASK) >>
+ Tn_INT_ROUTE_CAP_SHIFT;
+
+ /*
+ * In PIC mode, skip IRQ0-4, IRQ6-9, IRQ12-15 which is always used by
+ * legacy device. In IO APIC mode, we skip all the legacy IRQS.
+ */
+ if (acpi_irq_model == ACPI_IRQ_MODEL_PIC)
+ v &= ~0xf3df;
+ else
+ v &= ~0xffff;
+
+ for (irq = find_first_bit(&v, HPET_MAX_IRQ); irq < HPET_MAX_IRQ;
+ irq = find_next_bit(&v, HPET_MAX_IRQ, 1 + irq)) {
+
+ if (irq >= NR_IRQS) {
+ irq = HPET_MAX_IRQ;
+ break;
+ }
+
+ gsi = acpi_register_gsi(irq, ACPI_LEVEL_SENSITIVE,
+ ACPI_ACTIVE_LOW);
+ if (gsi > 0)
+ break;
+
+ /* FIXME: Setup interrupt source table */
+ }
+
+ if (irq < HPET_MAX_IRQ) {
+ spin_lock_irq(&hpet_lock);
+ v = readl(&timer->hpet_config);
+ v |= irq << Tn_INT_ROUTE_CNF_SHIFT;
+ writel(v, &timer->hpet_config);
+ devp->hd_hdwirq = gsi;
+ spin_unlock_irq(&hpet_lock);
+ }
+ return;
+}
+
static int hpet_open(struct inode *inode, struct file *file)
{
struct hpet_dev *devp;
for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
for (i = 0; i < hpetp->hp_ntimer; i++)
- if (hpetp->hp_dev[i].hd_flags & HPET_OPEN
- || hpetp->hp_dev[i].hd_task)
+ if (hpetp->hp_dev[i].hd_flags & HPET_OPEN)
continue;
else {
devp = &hpetp->hp_dev[i];
spin_unlock_irq(&hpet_lock);
unlock_kernel();
+ hpet_timer_set_irq(devp);
+
return 0;
}
devp->hd_irq = irq;
t = devp->hd_ireqfreq;
v = readq(&timer->hpet_config);
- g = v | Tn_INT_ENB_CNF_MASK;
+
+ /* 64-bit comparators are not yet supported through the ioctls,
+ * so force this into 32-bit mode if it supports both modes
+ */
+ g = v | Tn_32MODE_CNF_MASK | Tn_INT_ENB_CNF_MASK;
if (devp->hd_flags & HPET_PERIODIC) {
write_counter(t, &timer->hpet_compare);
v |= Tn_VAL_SET_CNF_MASK;
writeq(v, &timer->hpet_config);
local_irq_save(flags);
+
+ /* NOTE: what we modify here is a hidden accumulator
+ * register supported by periodic-capable comparators.
+ * We never want to modify the (single) counter; that
+ * would affect all the comparators.
+ */
m = read_counter(&hpet->hpet_mc);
write_counter(t + m + hpetp->hp_delta, &timer->hpet_compare);
} else {
return 0;
}
-static inline int hpet_tpcheck(struct hpet_task *tp)
-{
- struct hpet_dev *devp;
- struct hpets *hpetp;
-
- devp = tp->ht_opaque;
-
- if (!devp)
- return -ENXIO;
-
- for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
- if (devp >= hpetp->hp_dev
- && devp < (hpetp->hp_dev + hpetp->hp_ntimer)
- && devp->hd_hpet == hpetp->hp_hpet)
- return 0;
-
- return -ENXIO;
-}
-
-#if 0
-int hpet_unregister(struct hpet_task *tp)
-{
- struct hpet_dev *devp;
- struct hpet_timer __iomem *timer;
- int err;
-
- if ((err = hpet_tpcheck(tp)))
- return err;
-
- spin_lock_irq(&hpet_task_lock);
- spin_lock(&hpet_lock);
-
- devp = tp->ht_opaque;
- if (devp->hd_task != tp) {
- spin_unlock(&hpet_lock);
- spin_unlock_irq(&hpet_task_lock);
- return -ENXIO;
- }
-
- timer = devp->hd_timer;
- writeq((readq(&timer->hpet_config) & ~Tn_INT_ENB_CNF_MASK),
- &timer->hpet_config);
- devp->hd_flags &= ~(HPET_IE | HPET_PERIODIC);
- devp->hd_task = NULL;
- spin_unlock(&hpet_lock);
- spin_unlock_irq(&hpet_task_lock);
-
- return 0;
-}
-#endif /* 0 */
-
static ctl_table hpet_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
static struct hpets *last = NULL;
unsigned long period;
unsigned long long temp;
+ u32 remainder;
/*
* hpet_alloc can be called by platform dependent code.
printk("%s %d", i > 0 ? "," : "", hdp->hd_irq[i]);
printk("\n");
- printk(KERN_INFO "hpet%u: %u %d-bit timers, %Lu Hz\n",
- hpetp->hp_which, hpetp->hp_ntimer,
- cap & HPET_COUNTER_SIZE_MASK ? 64 : 32, hpetp->hp_tick_freq);
+ temp = hpetp->hp_tick_freq;
+ remainder = do_div(temp, 1000000);
+ printk(KERN_INFO
+ "hpet%u: %u comparators, %d-bit %u.%06u MHz counter\n",
+ hpetp->hp_which, hpetp->hp_ntimer,
+ cap & HPET_COUNTER_SIZE_MASK ? 64 : 32,
+ (unsigned) temp, remainder);
mcfg = readq(&hpet->hpet_config);
if ((mcfg & HPET_ENABLE_CNF_MASK) == 0) {
hdp->hd_address = ioremap(addr.minimum, addr.address_length);
if (hpet_is_known(hdp)) {
- printk(KERN_DEBUG "%s: 0x%lx is busy\n",
- __func__, hdp->hd_phys_address);
iounmap(hdp->hd_address);
return AE_ALREADY_EXISTS;
}
HPET_RANGE_SIZE);
if (hpet_is_known(hdp)) {
- printk(KERN_DEBUG "%s: 0x%lx is busy\n",
- __func__, hdp->hd_phys_address);
iounmap(hdp->hd_address);
return AE_ALREADY_EXISTS;
}
_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
}
-static inline void set_trap_gate(unsigned int n, void *addr)
+static inline void set_system_trap_gate(unsigned int n, void *addr)
{
BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+ _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
}
-static inline void set_system_gate(unsigned int n, void *addr)
+static inline void set_trap_gate(unsigned int n, void *addr)
{
BUG_ON((unsigned)n > 0xFF);
-#ifdef CONFIG_X86_32
- _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
-#else
- _set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
-#endif
+ _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
}
static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
}
-static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist)
{
BUG_ON((unsigned)n > 0xFF);
_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
extern int parse_unisys_oem (char *oemptr);
extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
extern void setup_unisys(void);
#ifndef CONFIG_X86_GENERICARCH
* can have a single pgd entry and a single pte table:
*/
#define NR_FIX_BTMAPS 64
-#define FIX_BTMAPS_NESTING 4
+#define FIX_BTMAPS_SLOTS 4
FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
(__end_of_permanent_fixed_addresses & 255),
- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
FIX_WP_TEST,
#ifdef CONFIG_ACPI
FIX_ACPI_BEGIN,
#ifdef CONFIG_PARAVIRT
FIX_PARAVIRT_BOOTMAP,
#endif
+ __end_of_permanent_fixed_addresses,
#ifdef CONFIG_ACPI
FIX_ACPI_BEGIN,
FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
FIX_OHCI1394_BASE,
#endif
- __end_of_permanent_fixed_addresses,
/*
* 256 temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*
- * We round it up to the next 512 pages boundary so that we
+ * We round it up to the next 256 pages boundary so that we
* can have a single pgd entry and a single pte table:
*/
#define NR_FIX_BTMAPS 64
-#define FIX_BTMAPS_NESTING 4
- FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
- (__end_of_permanent_fixed_addresses & 511),
- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+#define FIX_BTMAPS_SLOTS 4
+ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
+ (__end_of_permanent_fixed_addresses & 255),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
__end_of_fixed_addresses
};
#include <linux/compiler.h>
-/*
- * early_ioremap() and early_iounmap() are for temporary early boot-time
- * mappings, before the real ioremap() is functional.
- * A boot-time mapping is currently limited to at most 16 pages.
- */
-#ifndef __ASSEMBLY__
-extern void early_ioremap_init(void);
-extern void early_ioremap_clear(void);
-extern void early_ioremap_reset(void);
-extern void *early_ioremap(unsigned long offset, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
-#endif
-
#define build_mmio_read(name, size, type, reg, barrier) \
static inline type name(const volatile void __iomem *addr) \
{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
extern void early_ioremap_clear(void);
extern void early_ioremap_reset(void);
extern void *early_ioremap(unsigned long offset, unsigned long size);
+extern void *early_memremap(unsigned long offset, unsigned long size);
extern void early_iounmap(void *addr, unsigned long size);
extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
#include <asm-generic/iomap.h>
-extern void *early_ioremap(unsigned long addr, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-
/*
* This one maps high address device memory and turns off caching for that area.
* it's useful if some control registers are in such an area and write combining
return raw_irqs_disabled_flags(flags);
}
-/*
- * makes the traced hardirq state match with the machine state
- *
- * should be a rarely used function, only in places where its
- * otherwise impossible to know the irq state, like in traps.
- */
-static inline void trace_hardirqs_fixup_flags(unsigned long flags)
-{
- if (raw_irqs_disabled_flags(flags))
- trace_hardirqs_off();
- else
- trace_hardirqs_on();
-}
-
-static inline void trace_hardirqs_fixup(void)
-{
- unsigned long flags = __raw_local_save_flags();
-
- trace_hardirqs_fixup_flags(flags);
-}
-
#else
#ifdef CONFIG_X86_64
extern void die(const char *, struct pt_regs *,long);
extern int __must_check __die(const char *, struct pt_regs *, long);
extern void show_registers(struct pt_regs *regs);
-extern void __show_registers(struct pt_regs *, int all);
extern void show_trace(struct task_struct *t, struct pt_regs *regs,
unsigned long *sp, unsigned long bp);
-extern void __show_regs(struct pt_regs *regs);
+extern void __show_regs(struct pt_regs *regs, int all);
extern void show_regs(struct pt_regs *regs);
extern unsigned long oops_begin(void);
extern void oops_end(unsigned long, struct pt_regs *, int signr);
struct prev_kprobe prev_kprobe;
};
-/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
extern int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
#include <asm/mc146818rtc.h>
-static inline void clear_mem_error(unsigned char reason)
-{
- reason = (reason & 0xf) | 4;
- outb(reason, 0x61);
-}
-
static inline unsigned char get_nmi_reason(void)
{
return inb(0x61);
#define MODULE_PROC_FAMILY "EFFICEON "
#elif defined CONFIG_MWINCHIPC6
#define MODULE_PROC_FAMILY "WINCHIPC6 "
-#elif defined CONFIG_MWINCHIP2
-#define MODULE_PROC_FAMILY "WINCHIP2 "
#elif defined CONFIG_MWINCHIP3D
#define MODULE_PROC_FAMILY "WINCHIP3D "
#elif defined CONFIG_MCYRIXIII
*/
int do_nmi_callback(struct pt_regs *regs, int cpu);
-#ifdef CONFIG_X86_64
-extern void default_do_nmi(struct pt_regs *);
-#endif
-
extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
extern int check_nmi_watchdog(void);
extern int nmi_watchdog_enabled;
#endif /* CONFIG_PARAVIRT */
#define __pa(x) __phys_addr((unsigned long)(x))
+#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
/* __pa_symbol should be used for C visible symbols.
This seems to be the official gcc blessed way to do such arithmetic. */
#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
#define __boot_va(x) __va(x)
#define __boot_pa(x) __pa(x)
+/*
+ * virt_to_page(kaddr) returns a valid pointer if and only if
+ * virt_addr_valid(kaddr) returns true.
+ */
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+extern bool __virt_addr_valid(unsigned long kaddr);
+#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr))
#endif /* __ASSEMBLY__ */
#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+#define STACKFAULT_STACK 0
+#define DOUBLEFAULT_STACK 1
+#define NMI_STACK 0
+#define DEBUG_STACK 0
+#define MCE_STACK 0
+#define N_EXCEPTION_STACKS 1
#ifdef CONFIG_X86_PAE
/* 44=32+12, the limit we can fit into an unsigned long pfn */
#endif
#ifndef __ASSEMBLY__
-#define __phys_addr_const(x) ((x) - PAGE_OFFSET)
+#define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET)
#ifdef CONFIG_DEBUG_VIRTUAL
extern unsigned long __phys_addr(unsigned long);
#else
-#define __phys_addr(x) ((x) - PAGE_OFFSET)
+#define __phys_addr(x) __phys_addr_nodebug(x)
#endif
#define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
#define _PAGE_BIT_PAT 7 /* on 4KB pages */
#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
-#define _PAGE_BIT_UNUSED2 10
+#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
#define _PAGE_BIT_UNUSED3 11
#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
-#define _PAGE_UNUSED2 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED2)
+#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
#define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+#define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
+
#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
#define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
+#define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
+#define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
+#define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
+#define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
+
/* xwr */
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
static inline int pte_special(pte_t pte)
{
- return pte_val(pte) & _PAGE_SPECIAL;
+ return pte_flags(pte) & _PAGE_SPECIAL;
}
static inline unsigned long pte_pfn(pte_t pte)
extern unsigned long
convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
-
-#ifdef CONFIG_X86_32
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code, int si_code);
-#endif
-
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
extern long syscall_trace_enter(struct pt_regs *);
* Matching rules for certain types of segments.
*/
-/* Matches only __KERNEL_CS, ignoring PnP / USER / APM segments */
-#define SEGMENT_IS_KERNEL_CODE(x) (((x) & 0xfc) == GDT_ENTRY_KERNEL_CS * 8)
-
-/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
-#define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8)
-
/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
#define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
void native_send_call_func_ipi(cpumask_t mask);
void native_send_call_func_single_ipi(int cpu);
+extern void prefill_possible_map(void);
+
void smp_store_cpu_info(int id);
#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
{
return cpus_weight(cpu_callout_map);
}
-#endif /* CONFIG_SMP */
-
-#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
-extern void prefill_possible_map(void);
#else
static inline void prefill_possible_map(void)
{
}
-#endif
+#endif /* CONFIG_SMP */
extern unsigned disabled_cpus __cpuinitdata;
\
/* regparm parameters for __switch_to(): */ \
[prev] "a" (prev), \
- [next] "d" (next)); \
+ [next] "d" (next) \
+ \
+ : /* reloaded segment registers */ \
+ "memory"); \
} while (0)
/*
#include <asm/debugreg.h>
-/* Common in X86_32 and X86_64 */
+#ifdef CONFIG_X86_32
+#define dotraplinkage
+#else
+#define dotraplinkage asmlinkage
+#endif
+
asmlinkage void divide_error(void);
asmlinkage void debug(void);
asmlinkage void nmi(void);
asmlinkage void bounds(void);
asmlinkage void invalid_op(void);
asmlinkage void device_not_available(void);
+#ifdef CONFIG_X86_64
+asmlinkage void double_fault(void);
+#endif
asmlinkage void coprocessor_segment_overrun(void);
asmlinkage void invalid_TSS(void);
asmlinkage void segment_not_present(void);
asmlinkage void stack_segment(void);
asmlinkage void general_protection(void);
asmlinkage void page_fault(void);
+asmlinkage void spurious_interrupt_bug(void);
asmlinkage void coprocessor_error(void);
-asmlinkage void simd_coprocessor_error(void);
asmlinkage void alignment_check(void);
-asmlinkage void spurious_interrupt_bug(void);
#ifdef CONFIG_X86_MCE
asmlinkage void machine_check(void);
#endif /* CONFIG_X86_MCE */
+asmlinkage void simd_coprocessor_error(void);
-void do_divide_error(struct pt_regs *, long);
-void do_overflow(struct pt_regs *, long);
-void do_bounds(struct pt_regs *, long);
-void do_coprocessor_segment_overrun(struct pt_regs *, long);
-void do_invalid_TSS(struct pt_regs *, long);
-void do_segment_not_present(struct pt_regs *, long);
-void do_stack_segment(struct pt_regs *, long);
-void do_alignment_check(struct pt_regs *, long);
-void do_invalid_op(struct pt_regs *, long);
-void do_general_protection(struct pt_regs *, long);
-void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_divide_error(struct pt_regs *, long);
+dotraplinkage void do_debug(struct pt_regs *, long);
+dotraplinkage void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_int3(struct pt_regs *, long);
+dotraplinkage void do_overflow(struct pt_regs *, long);
+dotraplinkage void do_bounds(struct pt_regs *, long);
+dotraplinkage void do_invalid_op(struct pt_regs *, long);
+dotraplinkage void do_device_not_available(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
+dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
+dotraplinkage void do_segment_not_present(struct pt_regs *, long);
+dotraplinkage void do_stack_segment(struct pt_regs *, long);
+dotraplinkage void do_general_protection(struct pt_regs *, long);
+dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
+dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
+dotraplinkage void do_alignment_check(struct pt_regs *, long);
+#ifdef CONFIG_X86_MCE
+dotraplinkage void do_machine_check(struct pt_regs *, long);
+#endif
+dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
+#ifdef CONFIG_X86_32
+dotraplinkage void do_iret_error(struct pt_regs *, long);
+#endif
static inline int get_si_code(unsigned long condition)
{
extern int kstack_depth_to_print;
#ifdef CONFIG_X86_32
-
-void do_iret_error(struct pt_regs *, long);
-void do_int3(struct pt_regs *, long);
-void do_debug(struct pt_regs *, long);
void math_error(void __user *);
-void do_coprocessor_error(struct pt_regs *, long);
-void do_simd_coprocessor_error(struct pt_regs *, long);
-void do_spurious_interrupt_bug(struct pt_regs *, long);
unsigned long patch_espfix_desc(unsigned long, unsigned long);
asmlinkage void math_emulate(long);
+#endif
-void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#else /* CONFIG_X86_32 */
-
-asmlinkage void double_fault(void);
-
-asmlinkage void do_int3(struct pt_regs *, long);
-asmlinkage void do_stack_segment(struct pt_regs *, long);
-asmlinkage void do_debug(struct pt_regs *, unsigned long);
-asmlinkage void do_coprocessor_error(struct pt_regs *);
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *);
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *);
-
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#endif /* CONFIG_X86_32 */
#endif /* ASM_X86__TRAPS_H */
#define hpet_compare _u1._hpet_compare
#define HPET_MAX_TIMERS (32)
+#define HPET_MAX_IRQ (32)
/*
* HPET general capabilities register
*/
#define Tn_INT_ROUTE_CAP_MASK (0xffffffff00000000ULL)
-#define Tn_INI_ROUTE_CAP_SHIFT (32UL)
+#define Tn_INT_ROUTE_CAP_SHIFT (32UL)
#define Tn_FSB_INT_DELCAP_MASK (0x8000UL)
#define Tn_FSB_INT_DELCAP_SHIFT (15)
#define Tn_FSB_EN_CNF_MASK (0x4000UL)
* exported interfaces
*/
-struct hpet_task {
- void (*ht_func) (void *);
- void *ht_data;
- void *ht_opaque;
-};
-
struct hpet_data {
unsigned long hd_phys_address;
void __iomem *hd_address;
unsigned short hd_nirqs;
- unsigned short hd_flags;
unsigned int hd_state; /* timer allocated */
unsigned int hd_irq[HPET_MAX_TIMERS];
};
-#define HPET_DATA_PLATFORM 0x0001 /* platform call to hpet_alloc */
-
static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
{
hd->hd_state |= (1 << timer);
unsigned short hi_timer;
};
-#define HPET_INFO_PERIODIC 0x0001 /* timer is periodic */
+#define HPET_INFO_PERIODIC 0x0010 /* periodic-capable comparator */
#define HPET_IE_ON _IO('h', 0x01) /* interrupt on */
#define HPET_IE_OFF _IO('h', 0x02) /* interrupt off */
projects / linux-2.6-omap-h63xx.git / commitdiff