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Diffstat (limited to 'include/asm-x86/pgtable.h')
-rw-r--r--include/asm-x86/pgtable.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index 3e5dbc4..04caa2f 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -18,6 +18,7 @@
#define _PAGE_BIT_UNUSED2 10
#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_BIT_NX 63 /* No execute: only valid after cpuid check */
#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
@@ -34,6 +35,8 @@
#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_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
+#define __HAVE_ARCH_PTE_SPECIAL
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
@@ -54,7 +57,7 @@
/* Set of bits not changed in pte_modify */
#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
- _PAGE_ACCESSED | _PAGE_DIRTY)
+ _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT)
#define _PAGE_CACHE_WB (0)
@@ -180,7 +183,7 @@ static inline int pte_exec(pte_t pte)
static inline int pte_special(pte_t pte)
{
- return 0;
+ return pte_val(pte) & _PAGE_SPECIAL;
}
static inline int pmd_large(pmd_t pte)
@@ -246,7 +249,7 @@ static inline pte_t pte_clrglobal(pte_t pte)
static inline pte_t pte_mkspecial(pte_t pte)
{
- return pte;
+ return __pte(pte_val(pte) | _PAGE_SPECIAL);
}
extern pteval_t __supported_pte_mask;
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