[PATCH] i386: Verify important CPUID bits in real mode

[powerpc.git] / include / asm-i386 / pgtable.h

diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index 5b88a6a..c6b8b94 100644 (file)
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -267,11 +267,18 @@ extern void vmalloc_sync_all(void);
  */
 #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)
-
-#define raw_ptep_get_and_clear(xp)     native_ptep_get_and_clear(xp)
 #endif
 
+/* local pte updates need not use xchg for locking */
+static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
+{
+       pte_t res = *ptep;
+
+       /* Pure native function needs no input for mm, addr */
+       native_pte_clear(NULL, 0, ptep);
+       return res;
+}
+
 /*
  * We only update the dirty/accessed state if we set
  * the dirty bit by hand in the kernel, since the hardware
@@ -336,7 +343,7 @@ do {                                                                        \
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
 static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
-       pte_t pte = raw_ptep_get_and_clear(ptep);
+       pte_t pte = native_ptep_get_and_clear(ptep);
        pte_update(mm, addr, ptep);
        return pte;
 }
@@ -346,8 +353,11 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long
 {
        pte_t pte;
        if (full) {
-               pte = *ptep;
-               pte_clear(mm, addr, ptep);
+               /*
+                * Full address destruction in progress; paravirt does not
+                * care about updates and native needs no locking
+                */
+               pte = native_local_ptep_get_and_clear(ptep);
        } else {
                pte = ptep_get_and_clear(mm, addr, ptep);
        }
@@ -476,24 +486,10 @@ extern pte_t *lookup_address(unsigned long address);
 #endif
 
 #if defined(CONFIG_HIGHPTE)
-#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_offset_map(dir, address) \
+       ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
+#define pte_offset_map_nested(dir, address) \
+       ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
 #define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
 #define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
 #else