Commit 30551bb3 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar

x86: add PG_LEVEL enum

this way PG_LEVEL_1GB will be an easy change.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 0a663088
...@@ -16,14 +16,12 @@ ...@@ -16,14 +16,12 @@
enum { enum {
NTEST = 400, NTEST = 400,
LOWEST_LEVEL = PG_LEVEL_4K,
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
LOWEST_LEVEL = 4,
LPS = (1 << PMD_SHIFT), LPS = (1 << PMD_SHIFT),
#elif defined(CONFIG_X86_PAE) #elif defined(CONFIG_X86_PAE)
LOWEST_LEVEL = 4,
LPS = (1 << PMD_SHIFT), LPS = (1 << PMD_SHIFT),
#else #else
LOWEST_LEVEL = 4, /* lookup_address lies here */
LPS = (1 << 22), LPS = (1 << 22),
#endif #endif
GPS = (1<<30) GPS = (1<<30)
......
...@@ -28,6 +28,8 @@ pte_t *lookup_address(unsigned long address, int *level) ...@@ -28,6 +28,8 @@ pte_t *lookup_address(unsigned long address, int *level)
pud_t *pud; pud_t *pud;
pmd_t *pmd; pmd_t *pmd;
*level = PG_LEVEL_NONE;
if (pgd_none(*pgd)) if (pgd_none(*pgd))
return NULL; return NULL;
pud = pud_offset(pgd, address); pud = pud_offset(pgd, address);
...@@ -36,11 +38,12 @@ pte_t *lookup_address(unsigned long address, int *level) ...@@ -36,11 +38,12 @@ pte_t *lookup_address(unsigned long address, int *level)
pmd = pmd_offset(pud, address); pmd = pmd_offset(pud, address);
if (pmd_none(*pmd)) if (pmd_none(*pmd))
return NULL; return NULL;
*level = 3;
*level = PG_LEVEL_2M;
if (pmd_large(*pmd)) if (pmd_large(*pmd))
return (pte_t *)pmd; return (pte_t *)pmd;
*level = 4;
*level = PG_LEVEL_4K;
return pte_offset_kernel(pmd, address); return pte_offset_kernel(pmd, address);
} }
...@@ -145,7 +148,7 @@ __change_page_attr(unsigned long address, struct page *page, pgprot_t prot) ...@@ -145,7 +148,7 @@ __change_page_attr(unsigned long address, struct page *page, pgprot_t prot)
address < (unsigned long)&_etext && address < (unsigned long)&_etext &&
(pgprot_val(prot) & _PAGE_NX)); (pgprot_val(prot) & _PAGE_NX));
if (level == 4) { if (level == PG_LEVEL_4K) {
set_pte_atomic(kpte, mk_pte(page, canon_pgprot(prot))); set_pte_atomic(kpte, mk_pte(page, canon_pgprot(prot)));
} else { } else {
err = split_large_page(kpte, address); err = split_large_page(kpte, address);
......
...@@ -234,6 +234,12 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) ...@@ -234,6 +234,12 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
enum {
PG_LEVEL_NONE,
PG_LEVEL_4K,
PG_LEVEL_2M,
};
/* /*
* Helper function that returns the kernel pagetable entry controlling * Helper function that returns the kernel pagetable entry controlling
* the virtual address 'address'. NULL means no pagetable entry present. * the virtual address 'address'. NULL means no pagetable entry present.
......
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