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author | Kristina Martsenko <kristina.martsenko@arm.com> | 2017-12-13 17:07:21 +0000 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2017-12-22 17:37:18 +0000 |
commit | 75387b92635e7dca410c1ef92cfe510019248f76 (patch) | |
tree | d3e2a0a1caee5599f1c53527a5671fd978da42a1 /arch/arm64/include/asm/pgtable.h | |
parent | 193383043f14a398393dc18bae8380f7fe665ec3 (diff) | |
download | linux-75387b92635e7dca410c1ef92cfe510019248f76.tar.bz2 |
arm64: handle 52-bit physical addresses in page table entries
The top 4 bits of a 52-bit physical address are positioned at bits
12..15 of a page table entry. Introduce macros to convert between a
physical address and its placement in a table entry, and change all
macros/functions that access PTEs to use them.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
[catalin.marinas@arm.com: some long lines wrapped]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
-rw-r--r-- | arch/arm64/include/asm/pgtable.h | 50 |
1 files changed, 38 insertions, 12 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 5d9554fb2692..4fd8af303e2c 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -57,9 +57,22 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) -#define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT) +/* + * Macros to convert between a physical address and its placement in a + * page table entry, taking care of 52-bit addresses. + */ +#ifdef CONFIG_ARM64_PA_BITS_52 +#define __pte_to_phys(pte) \ + ((pte_val(pte) & PTE_ADDR_LOW) | ((pte_val(pte) & PTE_ADDR_HIGH) << 36)) +#define __phys_to_pte_val(phys) (((phys) | ((phys) >> 36)) & PTE_ADDR_MASK) +#else +#define __pte_to_phys(pte) (pte_val(pte) & PTE_ADDR_MASK) +#define __phys_to_pte_val(phys) (phys) +#endif -#define pfn_pte(pfn,prot) (__pte(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot))) +#define pte_pfn(pte) (__pte_to_phys(pte) >> PAGE_SHIFT) +#define pfn_pte(pfn,prot) \ + __pte(__phys_to_pte_val((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) #define pte_none(pte) (!pte_val(pte)) #define pte_clear(mm,addr,ptep) set_pte(ptep, __pte(0)) @@ -284,6 +297,11 @@ static inline int pte_same(pte_t pte_a, pte_t pte_b) #define __HAVE_ARCH_PTE_SPECIAL +static inline pte_t pgd_pte(pgd_t pgd) +{ + return __pte(pgd_val(pgd)); +} + static inline pte_t pud_pte(pud_t pud) { return __pte(pud_val(pud)); @@ -349,16 +367,24 @@ static inline int pmd_protnone(pmd_t pmd) #define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT)) -#define pmd_pfn(pmd) (((pmd_val(pmd) & PMD_MASK) & PHYS_MASK) >> PAGE_SHIFT) -#define pfn_pmd(pfn,prot) (__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot))) +#define __pmd_to_phys(pmd) __pte_to_phys(pmd_pte(pmd)) +#define __phys_to_pmd_val(phys) __phys_to_pte_val(phys) +#define pmd_pfn(pmd) ((__pmd_to_phys(pmd) & PMD_MASK) >> PAGE_SHIFT) +#define pfn_pmd(pfn,prot) __pmd(__phys_to_pmd_val((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) #define mk_pmd(page,prot) pfn_pmd(page_to_pfn(page),prot) #define pud_write(pud) pte_write(pud_pte(pud)) -#define pud_pfn(pud) (((pud_val(pud) & PUD_MASK) & PHYS_MASK) >> PAGE_SHIFT) -#define pfn_pud(pfn,prot) (__pud(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot))) + +#define __pud_to_phys(pud) __pte_to_phys(pud_pte(pud)) +#define __phys_to_pud_val(phys) __phys_to_pte_val(phys) +#define pud_pfn(pud) ((__pud_to_phys(pud) & PUD_MASK) >> PAGE_SHIFT) +#define pfn_pud(pfn,prot) __pud(__phys_to_pud_val((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) #define set_pmd_at(mm, addr, pmdp, pmd) set_pte_at(mm, addr, (pte_t *)pmdp, pmd_pte(pmd)) +#define __pgd_to_phys(pgd) __pte_to_phys(pgd_pte(pgd)) +#define __phys_to_pgd_val(phys) __phys_to_pte_val(phys) + #define __pgprot_modify(prot,mask,bits) \ __pgprot((pgprot_val(prot) & ~(mask)) | (bits)) @@ -409,7 +435,7 @@ static inline void pmd_clear(pmd_t *pmdp) static inline phys_addr_t pmd_page_paddr(pmd_t pmd) { - return pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK; + return __pmd_to_phys(pmd); } /* Find an entry in the third-level page table. */ @@ -427,7 +453,7 @@ static inline phys_addr_t pmd_page_paddr(pmd_t pmd) #define pte_set_fixmap_offset(pmd, addr) pte_set_fixmap(pte_offset_phys(pmd, addr)) #define pte_clear_fixmap() clear_fixmap(FIX_PTE) -#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK)) +#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(__pmd_to_phys(pmd))) /* use ONLY for statically allocated translation tables */ #define pte_offset_kimg(dir,addr) ((pte_t *)__phys_to_kimg(pte_offset_phys((dir), (addr)))) @@ -460,7 +486,7 @@ static inline void pud_clear(pud_t *pudp) static inline phys_addr_t pud_page_paddr(pud_t pud) { - return pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK; + return __pud_to_phys(pud); } /* Find an entry in the second-level page table. */ @@ -473,7 +499,7 @@ static inline phys_addr_t pud_page_paddr(pud_t pud) #define pmd_set_fixmap_offset(pud, addr) pmd_set_fixmap(pmd_offset_phys(pud, addr)) #define pmd_clear_fixmap() clear_fixmap(FIX_PMD) -#define pud_page(pud) pfn_to_page(__phys_to_pfn(pud_val(pud) & PHYS_MASK)) +#define pud_page(pud) pfn_to_page(__phys_to_pfn(__pud_to_phys(pud))) /* use ONLY for statically allocated translation tables */ #define pmd_offset_kimg(dir,addr) ((pmd_t *)__phys_to_kimg(pmd_offset_phys((dir), (addr)))) @@ -512,7 +538,7 @@ static inline void pgd_clear(pgd_t *pgdp) static inline phys_addr_t pgd_page_paddr(pgd_t pgd) { - return pgd_val(pgd) & PHYS_MASK & (s32)PAGE_MASK; + return __pgd_to_phys(pgd); } /* Find an entry in the frst-level page table. */ @@ -525,7 +551,7 @@ static inline phys_addr_t pgd_page_paddr(pgd_t pgd) #define pud_set_fixmap_offset(pgd, addr) pud_set_fixmap(pud_offset_phys(pgd, addr)) #define pud_clear_fixmap() clear_fixmap(FIX_PUD) -#define pgd_page(pgd) pfn_to_page(__phys_to_pfn(pgd_val(pgd) & PHYS_MASK)) +#define pgd_page(pgd) pfn_to_page(__phys_to_pfn(__pgd_to_phys(pgd))) /* use ONLY for statically allocated translation tables */ #define pud_offset_kimg(dir,addr) ((pud_t *)__phys_to_kimg(pud_offset_phys((dir), (addr)))) |