#include <xen/interface/sched.h>
#include <xen/features.h>
#include <xen/page.h>
+#include <xen/hvc-console.h>
#include <asm/paravirt.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/reboot.h>
+#include <asm/pgalloc.h>
#include "xen-ops.h"
#include "mmu.h"
xen_release_ptpage(pfn, PT_PMD);
}
+#if PAGETABLE_LEVELS == 4
+static void xen_alloc_pud(struct mm_struct *mm, u32 pfn)
+{
+ xen_alloc_ptpage(mm, pfn, PT_PUD);
+}
+
+static void xen_release_pud(u32 pfn)
+{
+ xen_release_ptpage(pfn, PT_PUD);
+}
+#endif
+
#ifdef CONFIG_HIGHPTE
static void *xen_kmap_atomic_pte(struct page *page, enum km_type type)
{
static __init void xen_pagetable_setup_start(pgd_t *base)
{
+#ifdef CONFIG_X86_32
pgd_t *xen_pgd = (pgd_t *)xen_start_info->pt_base;
int i;
- /* special set_pte for pagetable initialization */
- pv_mmu_ops.set_pte = xen_set_pte_init;
-
init_mm.pgd = base;
/*
* copy top-level of Xen-supplied pagetable into place. This
/* Unpin initial Xen pagetable */
pin_pagetable_pfn(MMUEXT_UNPIN_TABLE,
PFN_DOWN(__pa(xen_start_info->pt_base)));
+#endif /* CONFIG_X86_32 */
}
void xen_setup_shared_info(void)
{
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
- unsigned long addr = fix_to_virt(FIX_PARAVIRT_BOOTMAP);
-
- /*
- * Create a mapping for the shared info page.
- * Should be set_fixmap(), but shared_info is a machine
- * address with no corresponding pseudo-phys address.
- */
- set_pte_mfn(addr,
- PFN_DOWN(xen_start_info->shared_info),
- PAGE_KERNEL);
-
- HYPERVISOR_shared_info = (struct shared_info *)addr;
+ set_fixmap(FIX_PARAVIRT_BOOTMAP,
+ xen_start_info->shared_info);
+
+ HYPERVISOR_shared_info =
+ (struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
} else
HYPERVISOR_shared_info =
(struct shared_info *)__va(xen_start_info->shared_info);
pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
pv_mmu_ops.release_pte = xen_release_pte;
pv_mmu_ops.release_pmd = xen_release_pmd;
+#if PAGETABLE_LEVELS == 4
+ pv_mmu_ops.alloc_pud = xen_alloc_pud;
+ pv_mmu_ops.release_pud = xen_release_pud;
+#endif
+
pv_mmu_ops.set_pte = xen_set_pte;
xen_setup_shared_info();
+#ifdef CONFIG_X86_32
/* Actually pin the pagetable down, but we can't set PG_pinned
yet because the page structures don't exist yet. */
pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(base)));
+#endif
}
static __init void xen_post_allocator_init(void)
{
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
+#if PAGETABLE_LEVELS == 4
+ pv_mmu_ops.set_pgd = xen_set_pgd;
+#endif
xen_mark_init_mm_pinned();
}
/* xen_vcpu_setup managed to place the vcpu_info within the
percpu area for all cpus, so make use of it */
+#ifdef CONFIG_X86_32
if (have_vcpu_info_placement) {
printk(KERN_INFO "Xen: using vcpu_info placement\n");
pv_irq_ops.irq_enable = xen_irq_enable_direct;
pv_mmu_ops.read_cr2 = xen_read_cr2_direct;
}
+#endif
}
static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
goto patch_site
switch (type) {
+#ifdef CONFIG_X86_32
SITE(pv_irq_ops, irq_enable);
SITE(pv_irq_ops, irq_disable);
SITE(pv_irq_ops, save_fl);
SITE(pv_irq_ops, restore_fl);
+#endif /* CONFIG_X86_32 */
#undef SITE
patch_site:
return ret;
}
+static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot)
+{
+ pte_t pte;
+
+ phys >>= PAGE_SHIFT;
+
+ switch (idx) {
+ case FIX_BTMAP_END ... FIX_BTMAP_BEGIN:
+#ifdef CONFIG_X86_F00F_BUG
+ case FIX_F00F_IDT:
+#endif
+#ifdef CONFIG_X86_32
+ case FIX_WP_TEST:
+ case FIX_VDSO:
+ case FIX_KMAP_BEGIN ... FIX_KMAP_END:
+#else
+ case VSYSCALL_LAST_PAGE ... VSYSCALL_FIRST_PAGE:
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+ case FIX_APIC_BASE: /* maps dummy local APIC */
+#endif
+ pte = pfn_pte(phys, prot);
+ break;
+
+ default:
+ pte = mfn_pte(phys, prot);
+ break;
+ }
+
+ __native_set_fixmap(idx, pte);
+}
+
static const struct pv_info xen_info __initdata = {
.paravirt_enabled = 1,
.shared_kernel_pmd = 0,
.set_wallclock = xen_set_wallclock,
.get_wallclock = xen_get_wallclock,
- .get_cpu_khz = xen_cpu_khz,
+ .get_tsc_khz = xen_tsc_khz,
.sched_clock = xen_sched_clock,
};
.read_pmc = native_read_pmc,
.iret = xen_iret,
- .irq_enable_syscall_ret = xen_sysexit,
+ .irq_enable_sysexit = xen_sysexit,
.load_tr_desc = paravirt_nop,
.set_ldt = xen_set_ldt,
.irq_enable = xen_irq_enable,
.safe_halt = xen_safe_halt,
.halt = xen_halt,
+#ifdef CONFIG_X86_64
+ .adjust_exception_frame = paravirt_nop,
+#endif
};
static const struct pv_apic_ops xen_apic_ops __initdata = {
.pte_update = paravirt_nop,
.pte_update_defer = paravirt_nop,
+ .pgd_alloc = __paravirt_pgd_alloc,
+ .pgd_free = paravirt_nop,
+
.alloc_pte = xen_alloc_pte_init,
.release_pte = xen_release_pte_init,
.alloc_pmd = xen_alloc_pte_init,
.kmap_atomic_pte = xen_kmap_atomic_pte,
#endif
- .set_pte = NULL, /* see xen_pagetable_setup_* */
+#ifdef CONFIG_X86_64
+ .set_pte = xen_set_pte,
+#else
+ .set_pte = xen_set_pte_init,
+#endif
.set_pte_at = xen_set_pte_at,
.set_pmd = xen_set_pmd_hyper,
.make_pte = xen_make_pte,
.make_pgd = xen_make_pgd,
+#ifdef CONFIG_X86_PAE
.set_pte_atomic = xen_set_pte_atomic,
.set_pte_present = xen_set_pte_at,
- .set_pud = xen_set_pud_hyper,
.pte_clear = xen_pte_clear,
.pmd_clear = xen_pmd_clear,
+#endif /* CONFIG_X86_PAE */
+ .set_pud = xen_set_pud_hyper,
.make_pmd = xen_make_pmd,
.pmd_val = xen_pmd_val,
+#if PAGETABLE_LEVELS == 4
+ .pud_val = xen_pud_val,
+ .make_pud = xen_make_pud,
+ .set_pgd = xen_set_pgd_hyper,
+
+ .alloc_pud = xen_alloc_pte_init,
+ .release_pud = xen_release_pte_init,
+#endif /* PAGETABLE_LEVELS == 4 */
+
.activate_mm = xen_activate_mm,
.dup_mmap = xen_dup_mmap,
.exit_mmap = xen_exit_mmap,
.enter = paravirt_enter_lazy_mmu,
.leave = xen_leave_lazy,
},
-};
-#ifdef CONFIG_SMP
-static const struct smp_ops xen_smp_ops __initdata = {
- .smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu,
- .smp_prepare_cpus = xen_smp_prepare_cpus,
- .cpu_up = xen_cpu_up,
- .smp_cpus_done = xen_smp_cpus_done,
-
- .smp_send_stop = xen_smp_send_stop,
- .smp_send_reschedule = xen_smp_send_reschedule,
- .smp_call_function_mask = xen_smp_call_function_mask,
+ .set_fixmap = xen_set_fixmap,
};
-#endif /* CONFIG_SMP */
static void xen_reboot(int reason)
{
static void __init xen_reserve_top(void)
{
+#ifdef CONFIG_X86_32
unsigned long top = HYPERVISOR_VIRT_START;
struct xen_platform_parameters pp;
top = pp.virt_start;
reserve_top_address(-top + 2 * PAGE_SIZE);
+#endif /* CONFIG_X86_32 */
+}
+
+#ifdef CONFIG_X86_64
+/*
+ * Like __va(), but returns address in the kernel mapping (which is
+ * all we have until the physical memory mapping has been set up.
+ */
+static void *__ka(phys_addr_t paddr)
+{
+ return (void *)(paddr + __START_KERNEL_map);
+}
+
+/* Convert a machine address to physical address */
+static unsigned long m2p(phys_addr_t maddr)
+{
+ phys_addr_t paddr;
+
+ maddr &= PTE_MASK;
+ paddr = mfn_to_pfn(maddr >> PAGE_SHIFT) << PAGE_SHIFT;
+
+ return paddr;
+}
+
+/* Convert a machine address to kernel virtual */
+static void *m2v(phys_addr_t maddr)
+{
+ return __ka(m2p(maddr));
+}
+
+static void walk(pgd_t *pgd, unsigned long addr)
+{
+ unsigned l4idx = pgd_index(addr);
+ unsigned l3idx = pud_index(addr);
+ unsigned l2idx = pmd_index(addr);
+ unsigned l1idx = pte_index(addr);
+ pgd_t l4;
+ pud_t l3;
+ pmd_t l2;
+ pte_t l1;
+
+ xen_raw_printk("walk %p, %lx -> %d %d %d %d\n",
+ pgd, addr, l4idx, l3idx, l2idx, l1idx);
+
+ l4 = pgd[l4idx];
+ xen_raw_printk(" l4: %016lx\n", l4.pgd);
+ xen_raw_printk(" %016lx\n", pgd_val(l4));
+
+ l3 = ((pud_t *)(m2v(l4.pgd)))[l3idx];
+ xen_raw_printk(" l3: %016lx\n", l3.pud);
+ xen_raw_printk(" %016lx\n", pud_val(l3));
+
+ l2 = ((pmd_t *)(m2v(l3.pud)))[l2idx];
+ xen_raw_printk(" l2: %016lx\n", l2.pmd);
+ xen_raw_printk(" %016lx\n", pmd_val(l2));
+
+ l1 = ((pte_t *)(m2v(l2.pmd)))[l1idx];
+ xen_raw_printk(" l1: %016lx\n", l1.pte);
+ xen_raw_printk(" %016lx\n", pte_val(l1));
}
+static void set_page_prot(void *addr, pgprot_t prot)
+{
+ unsigned long pfn = __pa(addr) >> PAGE_SHIFT;
+ pte_t pte = pfn_pte(pfn, prot);
+
+ xen_raw_printk("addr=%p pfn=%lx mfn=%lx prot=%016x pte=%016x\n",
+ addr, pfn, get_phys_to_machine(pfn),
+ pgprot_val(prot), pte.pte);
+
+ if (HYPERVISOR_update_va_mapping((unsigned long)addr, pte, 0))
+ BUG();
+}
+
+static void convert_pfn_mfn(void *v)
+{
+ pte_t *pte = v;
+ int i;
+
+ /* All levels are converted the same way, so just treat them
+ as ptes. */
+ for(i = 0; i < PTRS_PER_PTE; i++)
+ pte[i] = xen_make_pte(pte[i].pte);
+}
+
+/*
+ * Set up the inital kernel pagetable.
+ *
+ * We can construct this by grafting the Xen provided pagetable into
+ * head_64.S's preconstructed pagetables. We copy the Xen L2's into
+ * level2_ident_pgt, level2_kernel_pgt and level2_fixmap_pgt. This
+ * means that only the kernel has a physical mapping to start with -
+ * but that's enough to get __va working. We need to fill in the rest
+ * of the physical mapping once some sort of allocator has been set
+ * up.
+ */
+static __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd)
+{
+ pud_t *l3;
+ pmd_t *l2;
+
+ /* Zap identity mapping */
+ init_level4_pgt[0] = __pgd(0);
+
+ /* Pre-constructed entries are in pfn, so convert to mfn */
+ convert_pfn_mfn(init_level4_pgt);
+ convert_pfn_mfn(level3_ident_pgt);
+ convert_pfn_mfn(level3_kernel_pgt);
+
+ l3 = m2v(pgd[pgd_index(__START_KERNEL_map)].pgd);
+ l2 = m2v(l3[pud_index(__START_KERNEL_map)].pud);
+
+ memcpy(level2_ident_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD);
+ memcpy(level2_kernel_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD);
+
+ l3 = m2v(pgd[pgd_index(__START_KERNEL_map + PMD_SIZE)].pgd);
+ l2 = m2v(l3[pud_index(__START_KERNEL_map + PMD_SIZE)].pud);
+ memcpy(level2_fixmap_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD);
+
+ /* Make pagetable pieces RO */
+ set_page_prot(init_level4_pgt, PAGE_KERNEL_RO);
+ set_page_prot(level3_ident_pgt, PAGE_KERNEL_RO);
+ set_page_prot(level3_kernel_pgt, PAGE_KERNEL_RO);
+ set_page_prot(level2_ident_pgt, PAGE_KERNEL_RO);
+ set_page_prot(level2_kernel_pgt, PAGE_KERNEL_RO);
+ set_page_prot(level2_fixmap_pgt, PAGE_KERNEL_RO);
+
+ /* Pin down new L4 */
+ pin_pagetable_pfn(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(init_level4_pgt)));
+
+ /* Unpin Xen-provided one */
+ pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(pgd)));
+
+ /* Switch over */
+ pgd = init_level4_pgt;
+ xen_write_cr3(__pa(pgd));
+
+ max_pfn_mapped = PFN_DOWN(__pa(pgd) +
+ xen_start_info->nr_pt_frames*PAGE_SIZE +
+ 512*1024);
+
+ return pgd;
+}
+#else
+static __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd)
+{
+ init_pg_tables_start = __pa(pgd);
+ init_pg_tables_end = __pa(pgd) + xen_start_info->nr_pt_frames*PAGE_SIZE;
+ max_pfn_mapped = PFN_DOWN(init_pg_tables_end + 512*1024);
+
+ return pgd;
+}
+#endif /* CONFIG_X86_64 */
+
/* First C function to be called on Xen boot */
asmlinkage void __init xen_start_kernel(void)
{
machine_ops = xen_machine_ops;
-#ifdef CONFIG_SMP
- smp_ops = xen_smp_ops;
+#ifdef CONFIG_X86_64
+ /* Disable until direct per-cpu data access. */
+ have_vcpu_info_placement = 0;
+ x86_64_init_pda();
#endif
+ xen_smp_init();
+
/* Get mfn list */
if (!xen_feature(XENFEAT_auto_translated_physmap))
xen_build_dynamic_phys_to_machine();
pgd = (pgd_t *)xen_start_info->pt_base;
- init_pg_tables_end = __pa(pgd) + xen_start_info->nr_pt_frames*PAGE_SIZE;
+ /* Prevent unwanted bits from being set in PTEs. */
+ __supported_pte_mask &= ~_PAGE_GLOBAL;
+ if (!is_initial_xendomain())
+ __supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD);
- init_mm.pgd = pgd; /* use the Xen pagetables to start */
+ /* Don't do the full vcpu_info placement stuff until we have a
+ possible map and a non-dummy shared_info. */
+ per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
+
+ xen_raw_console_write("mapping kernel into physical memory\n");
+ pgd = xen_setup_kernel_pagetable(pgd);
+
+ init_mm.pgd = pgd;
/* keep using Xen gdt for now; no urgent need to change it */
x86_write_percpu(xen_cr3, __pa(pgd));
x86_write_percpu(xen_current_cr3, __pa(pgd));
- /* Don't do the full vcpu_info placement stuff until we have a
- possible map and a non-dummy shared_info. */
- per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
-
pv_info.kernel_rpl = 1;
if (xen_feature(XENFEAT_supervisor_mode_kernel))
pv_info.kernel_rpl = 0;
- /* Prevent unwanted bits from being set in PTEs. */
- __supported_pte_mask &= ~_PAGE_GLOBAL;
- if (!is_initial_xendomain())
- __supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD);
-
/* set the limit of our address space */
xen_reserve_top();
+#ifdef CONFIG_X86_32
/* set up basic CPUID stuff */
cpu_detect(&new_cpu_data);
new_cpu_data.hard_math = 1;
new_cpu_data.x86_capability[0] = cpuid_edx(1);
+#endif
/* Poke various useful things into boot_params */
boot_params.hdr.type_of_loader = (9 << 4) | 0;
add_preferred_console("hvc", 0, NULL);
}
+ xen_raw_console_write("about to get started...\n");
+
+#if 0
+ xen_raw_printk("&boot_params=%p __pa(&boot_params)=%lx __va(__pa(&boot_params))=%lx\n",
+ &boot_params, __pa_symbol(&boot_params),
+ __va(__pa_symbol(&boot_params)));
+
+ walk(pgd, &boot_params);
+ walk(pgd, __va(__pa(&boot_params)));
+#endif
+
/* Start the world */
- start_kernel();
+#ifdef CONFIG_X86_32
+ i386_start_kernel();
+#else
+ x86_64_start_reservations((char *)__pa_symbol(&boot_params));
+#endif
}
projects / linux-2.6-omap-h63xx.git / blobdiff