diff options
| -rw-r--r-- | arch/i386/kernel/paravirt.c | 2 | ||||
| -rw-r--r-- | arch/i386/kernel/vmi.c | 19 | ||||
| -rw-r--r-- | include/asm-i386/paravirt.h | 4 | ||||
| -rw-r--r-- | include/asm-i386/pgtable.h | 23 |
4 files changed, 44 insertions, 4 deletions
diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c index 8352394d5ef..12e3bc49b83 100644 --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -553,6 +553,8 @@ struct paravirt_ops paravirt_ops = { .flush_tlb_kernel = native_flush_tlb_global, .flush_tlb_single = native_flush_tlb_single, + .map_pt_hook = (void *)native_nop, + .alloc_pt = (void *)native_nop, .alloc_pd = (void *)native_nop, .alloc_pd_clone = (void *)native_nop, diff --git a/arch/i386/kernel/vmi.c b/arch/i386/kernel/vmi.c index acdfe69fb7a..bd1037bd124 100644 --- a/arch/i386/kernel/vmi.c +++ b/arch/i386/kernel/vmi.c @@ -370,6 +370,24 @@ static void vmi_check_page_type(u32 pfn, int type) #define vmi_check_page_type(p,t) do { } while (0) #endif +static void vmi_map_pt_hook(int type, pte_t *va, u32 pfn) +{ + /* + * Internally, the VMI ROM must map virtual addresses to physical + * addresses for processing MMU updates. By the time MMU updates + * are issued, this information is typically already lost. + * Fortunately, the VMI provides a cache of mapping slots for active + * page tables. + * + * We use slot zero for the linear mapping of physical memory, and + * in HIGHPTE kernels, slot 1 and 2 for KM_PTE0 and KM_PTE1. + * + * args: SLOT VA COUNT PFN + */ + BUG_ON(type != KM_PTE0 && type != KM_PTE1); + vmi_ops.set_linear_mapping((type - KM_PTE0)+1, (u32)va, 1, pfn); +} + static void vmi_allocate_pt(u32 pfn) { vmi_set_page_type(pfn, VMI_PAGE_L1); @@ -813,6 +831,7 @@ static inline int __init activate_vmi(void) vmi_ops.allocate_page = vmi_get_function(VMI_CALL_AllocatePage); vmi_ops.release_page = vmi_get_function(VMI_CALL_ReleasePage); + paravirt_ops.map_pt_hook = vmi_map_pt_hook; paravirt_ops.alloc_pt = vmi_allocate_pt; paravirt_ops.alloc_pd = vmi_allocate_pd; paravirt_ops.alloc_pd_clone = vmi_allocate_pd_clone; diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h index a35c8148065..e01d895d737 100644 --- a/include/asm-i386/paravirt.h +++ b/include/asm-i386/paravirt.h @@ -131,6 +131,8 @@ struct paravirt_ops void (*flush_tlb_kernel)(void); void (*flush_tlb_single)(u32 addr); + void (fastcall *map_pt_hook)(int type, pte_t *va, u32 pfn); + void (*alloc_pt)(u32 pfn); void (*alloc_pd)(u32 pfn); void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count); @@ -354,6 +356,8 @@ static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip, #define __flush_tlb_global() paravirt_ops.flush_tlb_kernel() #define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr) +#define paravirt_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn) + #define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn) #define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn) diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index e6a4723f0eb..c3b58d473a5 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -263,6 +263,7 @@ static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return p */ #define pte_update(mm, addr, ptep) do { } while (0) #define pte_update_defer(mm, addr, ptep) do { } while (0) +#define paravirt_map_pt_hook(slot, va, pfn) do { } while (0) #endif /* @@ -469,10 +470,24 @@ extern pte_t *lookup_address(unsigned long address); #endif #if defined(CONFIG_HIGHPTE) -#define pte_offset_map(dir, address) \ - ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE0) + pte_index(address)) -#define pte_offset_map_nested(dir, address) \ - ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE1) + pte_index(address)) +#define pte_offset_map(dir, address) \ +({ \ + pte_t *__ptep; \ + unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \ + __ptep = (pte_t *)kmap_atomic(pfn_to_page(pfn),KM_PTE0);\ + paravirt_map_pt_hook(KM_PTE0,__ptep, pfn); \ + __ptep = __ptep + pte_index(address); \ + __ptep; \ +}) +#define pte_offset_map_nested(dir, address) \ +({ \ + pte_t *__ptep; \ + unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \ + __ptep = (pte_t *)kmap_atomic(pfn_to_page(pfn),KM_PTE1);\ + paravirt_map_pt_hook(KM_PTE1,__ptep, pfn); \ + __ptep = __ptep + pte_index(address); \ + __ptep; \ +}) #define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0) #define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1) #else |