# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_spinlock.o = -pg
CFLAGS_REMOVE_time.o = -pg
+CFLAGS_REMOVE_irq.o = -pg
endif
-obj-y := enlighten.o setup.o multicalls.o mmu.o \
+obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
time.o xen-asm_$(BITS).o grant-table.o suspend.o
obj-$(CONFIG_SMP) += smp.o spinlock.o
#include <xen/interface/xen.h>
#include <xen/interface/physdev.h>
#include <xen/interface/vcpu.h>
-#include <xen/interface/sched.h>
#include <xen/features.h>
#include <xen/page.h>
#include <xen/hvc-console.h>
return HYPERVISOR_get_debugreg(reg);
}
-static unsigned long xen_save_fl(void)
-{
- struct vcpu_info *vcpu;
- unsigned long flags;
-
- vcpu = x86_read_percpu(xen_vcpu);
-
- /* flag has opposite sense of mask */
- flags = !vcpu->evtchn_upcall_mask;
-
- /* convert to IF type flag
- -0 -> 0x00000000
- -1 -> 0xffffffff
- */
- return (-flags) & X86_EFLAGS_IF;
-}
-
-static void xen_restore_fl(unsigned long flags)
-{
- struct vcpu_info *vcpu;
-
- /* convert from IF type flag */
- flags = !(flags & X86_EFLAGS_IF);
-
- /* There's a one instruction preempt window here. We need to
- make sure we're don't switch CPUs between getting the vcpu
- pointer and updating the mask. */
- preempt_disable();
- vcpu = x86_read_percpu(xen_vcpu);
- vcpu->evtchn_upcall_mask = flags;
- preempt_enable_no_resched();
-
- /* Doesn't matter if we get preempted here, because any
- pending event will get dealt with anyway. */
-
- if (flags == 0) {
- preempt_check_resched();
- barrier(); /* unmask then check (avoid races) */
- if (unlikely(vcpu->evtchn_upcall_pending))
- force_evtchn_callback();
- }
-}
-
-static void xen_irq_disable(void)
-{
- /* There's a one instruction preempt window here. We need to
- make sure we're don't switch CPUs between getting the vcpu
- pointer and updating the mask. */
- preempt_disable();
- x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
- preempt_enable_no_resched();
-}
-
-static void xen_irq_enable(void)
-{
- struct vcpu_info *vcpu;
-
- /* We don't need to worry about being preempted here, since
- either a) interrupts are disabled, so no preemption, or b)
- the caller is confused and is trying to re-enable interrupts
- on an indeterminate processor. */
-
- vcpu = x86_read_percpu(xen_vcpu);
- vcpu->evtchn_upcall_mask = 0;
-
- /* Doesn't matter if we get preempted here, because any
- pending event will get dealt with anyway. */
-
- barrier(); /* unmask then check (avoid races) */
- if (unlikely(vcpu->evtchn_upcall_pending))
- force_evtchn_callback();
-}
-
-static void xen_safe_halt(void)
-{
- /* Blocking includes an implicit local_irq_enable(). */
- if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
- BUG();
-}
-
-static void xen_halt(void)
-{
- if (irqs_disabled())
- HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
- else
- xen_safe_halt();
-}
-
static void xen_leave_lazy(void)
{
paravirt_leave_lazy(paravirt_get_lazy_mode());
},
};
-static void __init __xen_init_IRQ(void)
-{
-#ifdef CONFIG_X86_64
- int i;
-
- /* Create identity vector->irq map */
- for(i = 0; i < NR_VECTORS; i++) {
- int cpu;
-
- for_each_possible_cpu(cpu)
- per_cpu(vector_irq, cpu)[i] = i;
- }
-#endif /* CONFIG_X86_64 */
-
- xen_init_IRQ();
-}
-
-static const struct pv_irq_ops xen_irq_ops __initdata = {
- .init_IRQ = __xen_init_IRQ,
- .save_fl = xen_save_fl,
- .restore_fl = xen_restore_fl,
- .irq_disable = xen_irq_disable,
- .irq_enable = xen_irq_enable,
- .safe_halt = xen_safe_halt,
- .halt = xen_halt,
-#ifdef CONFIG_X86_64
- .adjust_exception_frame = xen_adjust_exception_frame,
-#endif
-};
-
static const struct pv_apic_ops xen_apic_ops __initdata = {
#ifdef CONFIG_X86_LOCAL_APIC
.apic_write = xen_apic_write,
pv_init_ops = xen_init_ops;
pv_time_ops = xen_time_ops;
pv_cpu_ops = xen_cpu_ops;
- pv_irq_ops = xen_irq_ops;
pv_apic_ops = xen_apic_ops;
pv_mmu_ops = xen_mmu_ops;
+ xen_init_irq_ops();
+
if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
--- /dev/null
+#include <linux/hardirq.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/sched.h>
+#include <xen/interface/vcpu.h>
+
+#include <asm/xen/hypercall.h>
+#include <asm/xen/hypervisor.h>
+
+#include "xen-ops.h"
+
+/*
+ * Force a proper event-channel callback from Xen after clearing the
+ * callback mask. We do this in a very simple manner, by making a call
+ * down into Xen. The pending flag will be checked by Xen on return.
+ */
+void xen_force_evtchn_callback(void)
+{
+ (void)HYPERVISOR_xen_version(0, NULL);
+}
+
+static void __init __xen_init_IRQ(void)
+{
+#ifdef CONFIG_X86_64
+ int i;
+
+ /* Create identity vector->irq map */
+ for(i = 0; i < NR_VECTORS; i++) {
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ per_cpu(vector_irq, cpu)[i] = i;
+ }
+#endif /* CONFIG_X86_64 */
+
+ xen_init_IRQ();
+}
+
+static unsigned long xen_save_fl(void)
+{
+ struct vcpu_info *vcpu;
+ unsigned long flags;
+
+ vcpu = x86_read_percpu(xen_vcpu);
+
+ /* flag has opposite sense of mask */
+ flags = !vcpu->evtchn_upcall_mask;
+
+ /* convert to IF type flag
+ -0 -> 0x00000000
+ -1 -> 0xffffffff
+ */
+ return (-flags) & X86_EFLAGS_IF;
+}
+
+static void xen_restore_fl(unsigned long flags)
+{
+ struct vcpu_info *vcpu;
+
+ /* convert from IF type flag */
+ flags = !(flags & X86_EFLAGS_IF);
+
+ /* There's a one instruction preempt window here. We need to
+ make sure we're don't switch CPUs between getting the vcpu
+ pointer and updating the mask. */
+ preempt_disable();
+ vcpu = x86_read_percpu(xen_vcpu);
+ vcpu->evtchn_upcall_mask = flags;
+ preempt_enable_no_resched();
+
+ /* Doesn't matter if we get preempted here, because any
+ pending event will get dealt with anyway. */
+
+ if (flags == 0) {
+ preempt_check_resched();
+ barrier(); /* unmask then check (avoid races) */
+ if (unlikely(vcpu->evtchn_upcall_pending))
+ xen_force_evtchn_callback();
+ }
+}
+
+static void xen_irq_disable(void)
+{
+ /* There's a one instruction preempt window here. We need to
+ make sure we're don't switch CPUs between getting the vcpu
+ pointer and updating the mask. */
+ preempt_disable();
+ x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
+ preempt_enable_no_resched();
+}
+
+static void xen_irq_enable(void)
+{
+ struct vcpu_info *vcpu;
+
+ /* We don't need to worry about being preempted here, since
+ either a) interrupts are disabled, so no preemption, or b)
+ the caller is confused and is trying to re-enable interrupts
+ on an indeterminate processor. */
+
+ vcpu = x86_read_percpu(xen_vcpu);
+ vcpu->evtchn_upcall_mask = 0;
+
+ /* Doesn't matter if we get preempted here, because any
+ pending event will get dealt with anyway. */
+
+ barrier(); /* unmask then check (avoid races) */
+ if (unlikely(vcpu->evtchn_upcall_pending))
+ xen_force_evtchn_callback();
+}
+
+static void xen_safe_halt(void)
+{
+ /* Blocking includes an implicit local_irq_enable(). */
+ if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
+ BUG();
+}
+
+static void xen_halt(void)
+{
+ if (irqs_disabled())
+ HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ else
+ xen_safe_halt();
+}
+
+static const struct pv_irq_ops xen_irq_ops __initdata = {
+ .init_IRQ = __xen_init_IRQ,
+ .save_fl = xen_save_fl,
+ .restore_fl = xen_restore_fl,
+ .irq_disable = xen_irq_disable,
+ .irq_enable = xen_irq_enable,
+ .safe_halt = xen_safe_halt,
+ .halt = xen_halt,
+#ifdef CONFIG_X86_64
+ .adjust_exception_frame = xen_adjust_exception_frame,
+#endif
+};
+
+void __init xen_init_irq_ops()
+{
+ pv_irq_ops = xen_irq_ops;
+}
push %eax
push %ecx
push %edx
- call force_evtchn_callback
+ call xen_force_evtchn_callback
pop %edx
pop %ecx
pop %eax
push %r9
push %r10
push %r11
- call force_evtchn_callback
+ call xen_force_evtchn_callback
pop %r11
pop %r10
pop %r9
void __init xen_build_dynamic_phys_to_machine(void);
+void xen_init_irq_ops(void);
void xen_setup_timer(int cpu);
void xen_setup_cpu_clockevents(void);
unsigned long xen_tsc_khz(void);
/* Xen will never allocate port zero for any purpose. */
#define VALID_EVTCHN(chn) ((chn) != 0)
-/*
- * Force a proper event-channel callback from Xen after clearing the
- * callback mask. We do this in a very simple manner, by making a call
- * down into Xen. The pending flag will be checked by Xen on return.
- */
-void force_evtchn_callback(void)
-{
- (void)HYPERVISOR_xen_version(0, NULL);
-}
-EXPORT_SYMBOL_GPL(force_evtchn_callback);
-
static struct irq_chip xen_dynamic_chip;
/* Constructor for packed IRQ information. */
projects / linux-2.6-omap-h63xx.git / commitdiff