| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_PGTABLE_H |
| #define _ASM_X86_PGTABLE_H |
| |
| #include <linux/mem_encrypt.h> |
| #include <asm/page.h> |
| #include <asm/pgtable_types.h> |
| |
| /* |
| * Macro to mark a page protection value as UC- |
| */ |
| #define pgprot_noncached(prot) \ |
| ((boot_cpu_data.x86 > 3) \ |
| ? (__pgprot(pgprot_val(prot) | \ |
| cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS))) \ |
| : (prot)) |
| |
| /* |
| * Macros to add or remove encryption attribute |
| */ |
| #define pgprot_encrypted(prot) __pgprot(__sme_set(pgprot_val(prot))) |
| #define pgprot_decrypted(prot) __pgprot(__sme_clr(pgprot_val(prot))) |
| |
| #ifndef __ASSEMBLY__ |
| #include <asm/x86_init.h> |
| |
| extern pgd_t early_top_pgt[PTRS_PER_PGD]; |
| int __init __early_make_pgtable(unsigned long address, pmdval_t pmd); |
| |
| void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd); |
| void ptdump_walk_pgd_level_debugfs(struct seq_file *m, pgd_t *pgd, bool user); |
| void ptdump_walk_pgd_level_checkwx(void); |
| |
| #ifdef CONFIG_DEBUG_WX |
| #define debug_checkwx() ptdump_walk_pgd_level_checkwx() |
| #else |
| #define debug_checkwx() do { } while (0) |
| #endif |
| |
| /* |
| * ZERO_PAGE is a global shared page that is always zero: used |
| * for zero-mapped memory areas etc.. |
| */ |
| extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
| __visible; |
| #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| |
| extern spinlock_t pgd_lock; |
| extern struct list_head pgd_list; |
| |
| extern struct mm_struct *pgd_page_get_mm(struct page *page); |
| |
| extern pmdval_t early_pmd_flags; |
| |
| #ifdef CONFIG_PARAVIRT |
| #include <asm/paravirt.h> |
| #else /* !CONFIG_PARAVIRT */ |
| #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
| |
| #define set_pte_atomic(ptep, pte) \ |
| native_set_pte_atomic(ptep, pte) |
| |
| #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| |
| #ifndef __PAGETABLE_P4D_FOLDED |
| #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| #define pgd_clear(pgd) (pgtable_l5_enabled() ? native_pgd_clear(pgd) : 0) |
| #endif |
| |
| #ifndef set_p4d |
| # define set_p4d(p4dp, p4d) native_set_p4d(p4dp, p4d) |
| #endif |
| |
| #ifndef __PAGETABLE_PUD_FOLDED |
| #define p4d_clear(p4d) native_p4d_clear(p4d) |
| #endif |
| |
| #ifndef set_pud |
| # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| #endif |
| |
| #ifndef __PAGETABLE_PUD_FOLDED |
| #define pud_clear(pud) native_pud_clear(pud) |
| #endif |
| |
| #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| #define pmd_clear(pmd) native_pmd_clear(pmd) |
| |
| #define pgd_val(x) native_pgd_val(x) |
| #define __pgd(x) native_make_pgd(x) |
| |
| #ifndef __PAGETABLE_P4D_FOLDED |
| #define p4d_val(x) native_p4d_val(x) |
| #define __p4d(x) native_make_p4d(x) |
| #endif |
| |
| #ifndef __PAGETABLE_PUD_FOLDED |
| #define pud_val(x) native_pud_val(x) |
| #define __pud(x) native_make_pud(x) |
| #endif |
| |
| #ifndef __PAGETABLE_PMD_FOLDED |
| #define pmd_val(x) native_pmd_val(x) |
| #define __pmd(x) native_make_pmd(x) |
| #endif |
| |
| #define pte_val(x) native_pte_val(x) |
| #define __pte(x) native_make_pte(x) |
| |
| #define arch_end_context_switch(prev) do {} while(0) |
| |
| #endif /* CONFIG_PARAVIRT */ |
| |
| /* |
| * The following only work if pte_present() is true. |
| * Undefined behaviour if not.. |
| */ |
| static inline int pte_dirty(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_DIRTY; |
| } |
| |
| |
| static inline u32 read_pkru(void) |
| { |
| if (boot_cpu_has(X86_FEATURE_OSPKE)) |
| return __read_pkru(); |
| return 0; |
| } |
| |
| static inline void write_pkru(u32 pkru) |
| { |
| if (boot_cpu_has(X86_FEATURE_OSPKE)) |
| __write_pkru(pkru); |
| } |
| |
| static inline int pte_young(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_ACCESSED; |
| } |
| |
| static inline int pmd_dirty(pmd_t pmd) |
| { |
| return pmd_flags(pmd) & _PAGE_DIRTY; |
| } |
| |
| static inline int pmd_young(pmd_t pmd) |
| { |
| return pmd_flags(pmd) & _PAGE_ACCESSED; |
| } |
| |
| static inline int pud_dirty(pud_t pud) |
| { |
| return pud_flags(pud) & _PAGE_DIRTY; |
| } |
| |
| static inline int pud_young(pud_t pud) |
| { |
| return pud_flags(pud) & _PAGE_ACCESSED; |
| } |
| |
| static inline int pte_write(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_RW; |
| } |
| |
| static inline int pte_huge(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_PSE; |
| } |
| |
| static inline int pte_global(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_GLOBAL; |
| } |
| |
| static inline int pte_exec(pte_t pte) |
| { |
| return !(pte_flags(pte) & _PAGE_NX); |
| } |
| |
| static inline int pte_special(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_SPECIAL; |
| } |
| |
| /* Entries that were set to PROT_NONE are inverted */ |
| |
| static inline u64 protnone_mask(u64 val); |
| |
| static inline unsigned long pte_pfn(pte_t pte) |
| { |
| phys_addr_t pfn = pte_val(pte); |
| pfn ^= protnone_mask(pfn); |
| return (pfn & PTE_PFN_MASK) >> PAGE_SHIFT; |
| } |
| |
| static inline unsigned long pmd_pfn(pmd_t pmd) |
| { |
| phys_addr_t pfn = pmd_val(pmd); |
| pfn ^= protnone_mask(pfn); |
| return (pfn & pmd_pfn_mask(pmd)) >> PAGE_SHIFT; |
| } |
| |
| static inline unsigned long pud_pfn(pud_t pud) |
| { |
| phys_addr_t pfn = pud_val(pud); |
| pfn ^= protnone_mask(pfn); |
| return (pfn & pud_pfn_mask(pud)) >> PAGE_SHIFT; |
| } |
| |
| static inline unsigned long p4d_pfn(p4d_t p4d) |
| { |
| return (p4d_val(p4d) & p4d_pfn_mask(p4d)) >> PAGE_SHIFT; |
| } |
| |
| static inline unsigned long pgd_pfn(pgd_t pgd) |
| { |
| return (pgd_val(pgd) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| } |
| |
| static inline int p4d_large(p4d_t p4d) |
| { |
| /* No 512 GiB pages yet */ |
| return 0; |
| } |
| |
| #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
| |
| static inline int pmd_large(pmd_t pte) |
| { |
| return pmd_flags(pte) & _PAGE_PSE; |
| } |
| |
| #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| static inline int pmd_trans_huge(pmd_t pmd) |
| { |
| return (pmd_val(pmd) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; |
| } |
| |
| #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD |
| static inline int pud_trans_huge(pud_t pud) |
| { |
| return (pud_val(pud) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; |
| } |
| #endif |
| |
| #define has_transparent_hugepage has_transparent_hugepage |
| static inline int has_transparent_hugepage(void) |
| { |
| return boot_cpu_has(X86_FEATURE_PSE); |
| } |
| |
| #ifdef __HAVE_ARCH_PTE_DEVMAP |
| static inline int pmd_devmap(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_DEVMAP); |
| } |
| |
| #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD |
| static inline int pud_devmap(pud_t pud) |
| { |
| return !!(pud_val(pud) & _PAGE_DEVMAP); |
| } |
| #else |
| static inline int pud_devmap(pud_t pud) |
| { |
| return 0; |
| } |
| #endif |
| |
| static inline int pgd_devmap(pgd_t pgd) |
| { |
| return 0; |
| } |
| #endif |
| #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| |
| static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
| { |
| pteval_t v = native_pte_val(pte); |
| |
| return native_make_pte(v | set); |
| } |
| |
| static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
| { |
| pteval_t v = native_pte_val(pte); |
| |
| return native_make_pte(v & ~clear); |
| } |
| |
| static inline pte_t pte_mkclean(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_DIRTY); |
| } |
| |
| static inline pte_t pte_mkold(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_ACCESSED); |
| } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_RW); |
| } |
| |
| static inline pte_t pte_mkexec(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_NX); |
| } |
| |
| static inline pte_t pte_mkdirty(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pte_t pte_mkyoung(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_ACCESSED); |
| } |
| |
| static inline pte_t pte_mkwrite(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_RW); |
| } |
| |
| static inline pte_t pte_mkhuge(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_PSE); |
| } |
| |
| static inline pte_t pte_clrhuge(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_PSE); |
| } |
| |
| static inline pte_t pte_mkglobal(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_GLOBAL); |
| } |
| |
| static inline pte_t pte_clrglobal(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_GLOBAL); |
| } |
| |
| static inline pte_t pte_mkspecial(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_SPECIAL); |
| } |
| |
| static inline pte_t pte_mkdevmap(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_SPECIAL|_PAGE_DEVMAP); |
| } |
| |
| static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
| { |
| pmdval_t v = native_pmd_val(pmd); |
| |
| return native_make_pmd(v | set); |
| } |
| |
| static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) |
| { |
| pmdval_t v = native_pmd_val(pmd); |
| |
| return native_make_pmd(v & ~clear); |
| } |
| |
| static inline pmd_t pmd_mkold(pmd_t pmd) |
| { |
| return pmd_clear_flags(pmd, _PAGE_ACCESSED); |
| } |
| |
| static inline pmd_t pmd_mkclean(pmd_t pmd) |
| { |
| return pmd_clear_flags(pmd, _PAGE_DIRTY); |
| } |
| |
| static inline pmd_t pmd_wrprotect(pmd_t pmd) |
| { |
| return pmd_clear_flags(pmd, _PAGE_RW); |
| } |
| |
| static inline pmd_t pmd_mkdirty(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pmd_t pmd_mkdevmap(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_DEVMAP); |
| } |
| |
| static inline pmd_t pmd_mkhuge(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_PSE); |
| } |
| |
| static inline pmd_t pmd_mkyoung(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_ACCESSED); |
| } |
| |
| static inline pmd_t pmd_mkwrite(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_RW); |
| } |
| |
| static inline pud_t pud_set_flags(pud_t pud, pudval_t set) |
| { |
| pudval_t v = native_pud_val(pud); |
| |
| return native_make_pud(v | set); |
| } |
| |
| static inline pud_t pud_clear_flags(pud_t pud, pudval_t clear) |
| { |
| pudval_t v = native_pud_val(pud); |
| |
| return native_make_pud(v & ~clear); |
| } |
| |
| static inline pud_t pud_mkold(pud_t pud) |
| { |
| return pud_clear_flags(pud, _PAGE_ACCESSED); |
| } |
| |
| static inline pud_t pud_mkclean(pud_t pud) |
| { |
| return pud_clear_flags(pud, _PAGE_DIRTY); |
| } |
| |
| static inline pud_t pud_wrprotect(pud_t pud) |
| { |
| return pud_clear_flags(pud, _PAGE_RW); |
| } |
| |
| static inline pud_t pud_mkdirty(pud_t pud) |
| { |
| return pud_set_flags(pud, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pud_t pud_mkdevmap(pud_t pud) |
| { |
| return pud_set_flags(pud, _PAGE_DEVMAP); |
| } |
| |
| static inline pud_t pud_mkhuge(pud_t pud) |
| { |
| return pud_set_flags(pud, _PAGE_PSE); |
| } |
| |
| static inline pud_t pud_mkyoung(pud_t pud) |
| { |
| return pud_set_flags(pud, _PAGE_ACCESSED); |
| } |
| |
| static inline pud_t pud_mkwrite(pud_t pud) |
| { |
| return pud_set_flags(pud, _PAGE_RW); |
| } |
| |
| #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
| static inline int pte_soft_dirty(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_SOFT_DIRTY; |
| } |
| |
| static inline int pmd_soft_dirty(pmd_t pmd) |
| { |
| return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; |
| } |
| |
| static inline int pud_soft_dirty(pud_t pud) |
| { |
| return pud_flags(pud) & _PAGE_SOFT_DIRTY; |
| } |
| |
| static inline pte_t pte_mksoft_dirty(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pud_t pud_mksoft_dirty(pud_t pud) |
| { |
| return pud_set_flags(pud, _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pte_t pte_clear_soft_dirty(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
| { |
| return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pud_t pud_clear_soft_dirty(pud_t pud) |
| { |
| return pud_clear_flags(pud, _PAGE_SOFT_DIRTY); |
| } |
| |
| #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
| |
| /* |
| * Mask out unsupported bits in a present pgprot. Non-present pgprots |
| * can use those bits for other purposes, so leave them be. |
| */ |
| static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
| { |
| pgprotval_t protval = pgprot_val(pgprot); |
| |
| if (protval & _PAGE_PRESENT) |
| protval &= __supported_pte_mask; |
| |
| return protval; |
| } |
| |
| static inline pgprotval_t check_pgprot(pgprot_t pgprot) |
| { |
| pgprotval_t massaged_val = massage_pgprot(pgprot); |
| |
| /* mmdebug.h can not be included here because of dependencies */ |
| #ifdef CONFIG_DEBUG_VM |
| WARN_ONCE(pgprot_val(pgprot) != massaged_val, |
| "attempted to set unsupported pgprot: %016llx " |
| "bits: %016llx supported: %016llx\n", |
| (u64)pgprot_val(pgprot), |
| (u64)pgprot_val(pgprot) ^ massaged_val, |
| (u64)__supported_pte_mask); |
| #endif |
| |
| return massaged_val; |
| } |
| |
| static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| { |
| phys_addr_t pfn = (phys_addr_t)page_nr << PAGE_SHIFT; |
| pfn ^= protnone_mask(pgprot_val(pgprot)); |
| pfn &= PTE_PFN_MASK; |
| return __pte(pfn | check_pgprot(pgprot)); |
| } |
| |
| static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| { |
| phys_addr_t pfn = (phys_addr_t)page_nr << PAGE_SHIFT; |
| pfn ^= protnone_mask(pgprot_val(pgprot)); |
| pfn &= PHYSICAL_PMD_PAGE_MASK; |
| return __pmd(pfn | check_pgprot(pgprot)); |
| } |
| |
| static inline pud_t pfn_pud(unsigned long page_nr, pgprot_t pgprot) |
| { |
| phys_addr_t pfn = (phys_addr_t)page_nr << PAGE_SHIFT; |
| pfn ^= protnone_mask(pgprot_val(pgprot)); |
| pfn &= PHYSICAL_PUD_PAGE_MASK; |
| return __pud(pfn | check_pgprot(pgprot)); |
| } |
| |
| static inline pmd_t pmd_mknotpresent(pmd_t pmd) |
| { |
| return pfn_pmd(pmd_pfn(pmd), |
| __pgprot(pmd_flags(pmd) & ~(_PAGE_PRESENT|_PAGE_PROTNONE))); |
| } |
| |
| static inline pud_t pud_mknotpresent(pud_t pud) |
| { |
| return pfn_pud(pud_pfn(pud), |
| __pgprot(pud_flags(pud) & ~(_PAGE_PRESENT|_PAGE_PROTNONE))); |
| } |
| |
| static inline u64 flip_protnone_guard(u64 oldval, u64 val, u64 mask); |
| |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| pteval_t val = pte_val(pte), oldval = val; |
| |
| /* |
| * Chop off the NX bit (if present), and add the NX portion of |
| * the newprot (if present): |
| */ |
| val &= _PAGE_CHG_MASK; |
| val |= check_pgprot(newprot) & ~_PAGE_CHG_MASK; |
| val = flip_protnone_guard(oldval, val, PTE_PFN_MASK); |
| return __pte(val); |
| } |
| |
| static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
| { |
| pmdval_t val = pmd_val(pmd), oldval = val; |
| |
| val &= _HPAGE_CHG_MASK; |
| val |= check_pgprot(newprot) & ~_HPAGE_CHG_MASK; |
| val = flip_protnone_guard(oldval, val, PHYSICAL_PMD_PAGE_MASK); |
| return __pmd(val); |
| } |
| |
| /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
| #define pgprot_modify pgprot_modify |
| static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
| { |
| pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
| pgprotval_t addbits = pgprot_val(newprot); |
| return __pgprot(preservebits | addbits); |
| } |
| |
| #define pte_pgprot(x) __pgprot(pte_flags(x)) |
| #define pmd_pgprot(x) __pgprot(pmd_flags(x)) |
| #define pud_pgprot(x) __pgprot(pud_flags(x)) |
| #define p4d_pgprot(x) __pgprot(p4d_flags(x)) |
| |
| #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
| |
| static inline pgprot_t arch_filter_pgprot(pgprot_t prot) |
| { |
| return canon_pgprot(prot); |
| } |
| |
| static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
| enum page_cache_mode pcm, |
| enum page_cache_mode new_pcm) |
| { |
| /* |
| * PAT type is always WB for untracked ranges, so no need to check. |
| */ |
| if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
| return 1; |
| |
| /* |
| * Certain new memtypes are not allowed with certain |
| * requested memtype: |
| * - request is uncached, return cannot be write-back |
| * - request is write-combine, return cannot be write-back |
| * - request is write-through, return cannot be write-back |
| * - request is write-through, return cannot be write-combine |
| */ |
| if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && |
| new_pcm == _PAGE_CACHE_MODE_WB) || |
| (pcm == _PAGE_CACHE_MODE_WC && |
| new_pcm == _PAGE_CACHE_MODE_WB) || |
| (pcm == _PAGE_CACHE_MODE_WT && |
| new_pcm == _PAGE_CACHE_MODE_WB) || |
| (pcm == _PAGE_CACHE_MODE_WT && |
| new_pcm == _PAGE_CACHE_MODE_WC)) { |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| pmd_t *populate_extra_pmd(unsigned long vaddr); |
| pte_t *populate_extra_pte(unsigned long vaddr); |
| #endif /* __ASSEMBLY__ */ |
| |
| #ifdef CONFIG_X86_32 |
| # include <asm/pgtable_32.h> |
| #else |
| # include <asm/pgtable_64.h> |
| #endif |
| |
| #ifndef __ASSEMBLY__ |
| #include <linux/mm_types.h> |
| #include <linux/mmdebug.h> |
| #include <linux/log2.h> |
| #include <asm/fixmap.h> |
| |
| static inline int pte_none(pte_t pte) |
| { |
| return !(pte.pte & ~(_PAGE_KNL_ERRATUM_MASK)); |
| } |
| |
| #define __HAVE_ARCH_PTE_SAME |
| static inline int pte_same(pte_t a, pte_t b) |
| { |
| return a.pte == b.pte; |
| } |
| |
| static inline int pte_present(pte_t a) |
| { |
| return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); |
| } |
| |
| #ifdef __HAVE_ARCH_PTE_DEVMAP |
| static inline int pte_devmap(pte_t a) |
| { |
| return (pte_flags(a) & _PAGE_DEVMAP) == _PAGE_DEVMAP; |
| } |
| #endif |
| |
| #define pte_accessible pte_accessible |
| static inline bool pte_accessible(struct mm_struct *mm, pte_t a) |
| { |
| if (pte_flags(a) & _PAGE_PRESENT) |
| return true; |
| |
| if ((pte_flags(a) & _PAGE_PROTNONE) && |
| mm_tlb_flush_pending(mm)) |
| return true; |
| |
| return false; |
| } |
| |
| static inline int pmd_present(pmd_t pmd) |
| { |
| /* |
| * Checking for _PAGE_PSE is needed too because |
| * split_huge_page will temporarily clear the present bit (but |
| * the _PAGE_PSE flag will remain set at all times while the |
| * _PAGE_PRESENT bit is clear). |
| */ |
| return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); |
| } |
| |
| #ifdef CONFIG_NUMA_BALANCING |
| /* |
| * These work without NUMA balancing but the kernel does not care. See the |
| * comment in include/asm-generic/pgtable.h |
| */ |
| static inline int pte_protnone(pte_t pte) |
| { |
| return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
| == _PAGE_PROTNONE; |
| } |
| |
| static inline int pmd_protnone(pmd_t pmd) |
| { |
| return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
| == _PAGE_PROTNONE; |
| } |
| #endif /* CONFIG_NUMA_BALANCING */ |
| |
| static inline int pmd_none(pmd_t pmd) |
| { |
| /* Only check low word on 32-bit platforms, since it might be |
| out of sync with upper half. */ |
| unsigned long val = native_pmd_val(pmd); |
| return (val & ~_PAGE_KNL_ERRATUM_MASK) == 0; |
| } |
| |
| static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
| { |
| return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd)); |
| } |
| |
| /* |
| * Currently stuck as a macro due to indirect forward reference to |
| * linux/mmzone.h's __section_mem_map_addr() definition: |
| */ |
| #define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd)) |
| |
| /* |
| * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] |
| * |
| * this macro returns the index of the entry in the pmd page which would |
| * control the given virtual address |
| */ |
| static inline unsigned long pmd_index(unsigned long address) |
| { |
| return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); |
| } |
| |
| /* |
| * Conversion functions: convert a page and protection to a page entry, |
| * and a page entry and page directory to the page they refer to. |
| * |
| * (Currently stuck as a macro because of indirect forward reference |
| * to linux/mm.h:page_to_nid()) |
| */ |
| #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| |
| /* |
| * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] |
| * |
| * this function returns the index of the entry in the pte page which would |
| * control the given virtual address |
| */ |
| static inline unsigned long pte_index(unsigned long address) |
| { |
| return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); |
| } |
| |
| static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
| { |
| return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); |
| } |
| |
| static inline int pmd_bad(pmd_t pmd) |
| { |
| return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
| } |
| |
| static inline unsigned long pages_to_mb(unsigned long npg) |
| { |
| return npg >> (20 - PAGE_SHIFT); |
| } |
| |
| #if CONFIG_PGTABLE_LEVELS > 2 |
| static inline int pud_none(pud_t pud) |
| { |
| return (native_pud_val(pud) & ~(_PAGE_KNL_ERRATUM_MASK)) == 0; |
| } |
| |
| static inline int pud_present(pud_t pud) |
| { |
| return pud_flags(pud) & _PAGE_PRESENT; |
| } |
| |
| static inline unsigned long pud_page_vaddr(pud_t pud) |
| { |
| return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud)); |
| } |
| |
| /* |
| * Currently stuck as a macro due to indirect forward reference to |
| * linux/mmzone.h's __section_mem_map_addr() definition: |
| */ |
| #define pud_page(pud) pfn_to_page(pud_pfn(pud)) |
| |
| /* Find an entry in the second-level page table.. */ |
| static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
| { |
| return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
| } |
| |
| static inline int pud_large(pud_t pud) |
| { |
| return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
| (_PAGE_PSE | _PAGE_PRESENT); |
| } |
| |
| static inline int pud_bad(pud_t pud) |
| { |
| return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
| } |
| #else |
| static inline int pud_large(pud_t pud) |
| { |
| return 0; |
| } |
| #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
| |
| static inline unsigned long pud_index(unsigned long address) |
| { |
| return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); |
| } |
| |
| #if CONFIG_PGTABLE_LEVELS > 3 |
| static inline int p4d_none(p4d_t p4d) |
| { |
| return (native_p4d_val(p4d) & ~(_PAGE_KNL_ERRATUM_MASK)) == 0; |
| } |
| |
| static inline int p4d_present(p4d_t p4d) |
| { |
| return p4d_flags(p4d) & _PAGE_PRESENT; |
| } |
| |
| static inline unsigned long p4d_page_vaddr(p4d_t p4d) |
| { |
| return (unsigned long)__va(p4d_val(p4d) & p4d_pfn_mask(p4d)); |
| } |
| |
| /* |
| * Currently stuck as a macro due to indirect forward reference to |
| * linux/mmzone.h's __section_mem_map_addr() definition: |
| */ |
| #define p4d_page(p4d) pfn_to_page(p4d_pfn(p4d)) |
| |
| /* Find an entry in the third-level page table.. */ |
| static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address) |
| { |
| return (pud_t *)p4d_page_vaddr(*p4d) + pud_index(address); |
| } |
| |
| static inline int p4d_bad(p4d_t p4d) |
| { |
| unsigned long ignore_flags = _KERNPG_TABLE | _PAGE_USER; |
| |
| if (IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION)) |
| ignore_flags |= _PAGE_NX; |
| |
| return (p4d_flags(p4d) & ~ignore_flags) != 0; |
| } |
| #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
| |
| static inline unsigned long p4d_index(unsigned long address) |
| { |
| return (address >> P4D_SHIFT) & (PTRS_PER_P4D - 1); |
| } |
| |
| #if CONFIG_PGTABLE_LEVELS > 4 |
| static inline int pgd_present(pgd_t pgd) |
| { |
| if (!pgtable_l5_enabled()) |
| return 1; |
| return pgd_flags(pgd) & _PAGE_PRESENT; |
| } |
| |
| static inline unsigned long pgd_page_vaddr(pgd_t pgd) |
| { |
| return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); |
| } |
| |
| /* |
| * Currently stuck as a macro due to indirect forward reference to |
| * linux/mmzone.h's __section_mem_map_addr() definition: |
| */ |
| #define pgd_page(pgd) pfn_to_page(pgd_pfn(pgd)) |
| |
| /* to find an entry in a page-table-directory. */ |
| static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address) |
| { |
| if (!pgtable_l5_enabled()) |
| return (p4d_t *)pgd; |
| return (p4d_t *)pgd_page_vaddr(*pgd) + p4d_index(address); |
| } |
| |
| static inline int pgd_bad(pgd_t pgd) |
| { |
| unsigned long ignore_flags = _PAGE_USER; |
| |
| if (!pgtable_l5_enabled()) |
| return 0; |
| |
| if (IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION)) |
| ignore_flags |= _PAGE_NX; |
| |
| return (pgd_flags(pgd) & ~ignore_flags) != _KERNPG_TABLE; |
| } |
| |
| static inline int pgd_none(pgd_t pgd) |
| { |
| if (!pgtable_l5_enabled()) |
| return 0; |
| /* |
| * There is no need to do a workaround for the KNL stray |
| * A/D bit erratum here. PGDs only point to page tables |
| * except on 32-bit non-PAE which is not supported on |
| * KNL. |
| */ |
| return !native_pgd_val(pgd); |
| } |
| #endif /* CONFIG_PGTABLE_LEVELS > 4 */ |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| /* |
| * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
| * |
| * this macro returns the index of the entry in the pgd page which would |
| * control the given virtual address |
| */ |
| #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| |
| /* |
| * pgd_offset() returns a (pgd_t *) |
| * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
| */ |
| #define pgd_offset_pgd(pgd, address) (pgd + pgd_index((address))) |
| /* |
| * a shortcut to get a pgd_t in a given mm |
| */ |
| #define pgd_offset(mm, address) pgd_offset_pgd((mm)->pgd, (address)) |
| /* |
| * a shortcut which implies the use of the kernel's pgd, instead |
| * of a process's |
| */ |
| #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
| |
| |
| #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| |
| #ifndef __ASSEMBLY__ |
| |
| extern int direct_gbpages; |
| void init_mem_mapping(void); |
| void early_alloc_pgt_buf(void); |
| extern void memblock_find_dma_reserve(void); |
| |
| #ifdef CONFIG_X86_64 |
| /* Realmode trampoline initialization. */ |
| extern pgd_t trampoline_pgd_entry; |
| static inline void __meminit init_trampoline_default(void) |
| { |
| /* Default trampoline pgd value */ |
| trampoline_pgd_entry = init_top_pgt[pgd_index(__PAGE_OFFSET)]; |
| } |
| # ifdef CONFIG_RANDOMIZE_MEMORY |
| void __meminit init_trampoline(void); |
| # else |
| # define init_trampoline init_trampoline_default |
| # endif |
| #else |
| static inline void init_trampoline(void) { } |
| #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; |
| } |
| |
| static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
| { |
| pmd_t res = *pmdp; |
| |
| native_pmd_clear(pmdp); |
| return res; |
| } |
| |
| static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp) |
| { |
| pud_t res = *pudp; |
| |
| native_pud_clear(pudp); |
| return res; |
| } |
| |
| static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep , pte_t pte) |
| { |
| native_set_pte(ptep, pte); |
| } |
| |
| static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
| pmd_t *pmdp, pmd_t pmd) |
| { |
| native_set_pmd(pmdp, pmd); |
| } |
| |
| static inline void set_pud_at(struct mm_struct *mm, unsigned long addr, |
| pud_t *pudp, pud_t pud) |
| { |
| native_set_pud(pudp, pud); |
| } |
| |
| /* |
| * We only update the dirty/accessed state if we set |
| * the dirty bit by hand in the kernel, since the hardware |
| * will do the accessed bit for us, and we don't want to |
| * race with other CPU's that might be updating the dirty |
| * bit at the same time. |
| */ |
| struct vm_area_struct; |
| |
| #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
| extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep, |
| pte_t entry, int dirty); |
| |
| #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
| extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep); |
| |
| #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
| extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep); |
| |
| #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 = native_ptep_get_and_clear(ptep); |
| return pte; |
| } |
| |
| #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
| static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep, |
| int full) |
| { |
| pte_t pte; |
| if (full) { |
| /* |
| * 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); |
| } |
| return pte; |
| } |
| |
| #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
| static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep) |
| { |
| clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
| } |
| |
| #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
| |
| #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
| |
| #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS |
| extern int pmdp_set_access_flags(struct vm_area_struct *vma, |
| unsigned long address, pmd_t *pmdp, |
| pmd_t entry, int dirty); |
| extern int pudp_set_access_flags(struct vm_area_struct *vma, |
| unsigned long address, pud_t *pudp, |
| pud_t entry, int dirty); |
| |
| #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG |
| extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, |
| unsigned long addr, pmd_t *pmdp); |
| extern int pudp_test_and_clear_young(struct vm_area_struct *vma, |
| unsigned long addr, pud_t *pudp); |
| |
| #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH |
| extern int pmdp_clear_flush_young(struct vm_area_struct *vma, |
| unsigned long address, pmd_t *pmdp); |
| |
| |
| #define pmd_write pmd_write |
| static inline int pmd_write(pmd_t pmd) |
| { |
| return pmd_flags(pmd) & _PAGE_RW; |
| } |
| |
| #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
| static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| pmd_t *pmdp) |
| { |
| return native_pmdp_get_and_clear(pmdp); |
| } |
| |
| #define __HAVE_ARCH_PUDP_HUGE_GET_AND_CLEAR |
| static inline pud_t pudp_huge_get_and_clear(struct mm_struct *mm, |
| unsigned long addr, pud_t *pudp) |
| { |
| return native_pudp_get_and_clear(pudp); |
| } |
| |
| #define __HAVE_ARCH_PMDP_SET_WRPROTECT |
| static inline void pmdp_set_wrprotect(struct mm_struct *mm, |
| unsigned long addr, pmd_t *pmdp) |
| { |
| clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); |
| } |
| |
| #define pud_write pud_write |
| static inline int pud_write(pud_t pud) |
| { |
| return pud_flags(pud) & _PAGE_RW; |
| } |
| |
| #ifndef pmdp_establish |
| #define pmdp_establish pmdp_establish |
| static inline pmd_t pmdp_establish(struct vm_area_struct *vma, |
| unsigned long address, pmd_t *pmdp, pmd_t pmd) |
| { |
| if (IS_ENABLED(CONFIG_SMP)) { |
| return xchg(pmdp, pmd); |
| } else { |
| pmd_t old = *pmdp; |
| *pmdp = pmd; |
| return old; |
| } |
| } |
| #endif |
| |
| /* |
| * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| * |
| * dst - pointer to pgd range anwhere on a pgd page |
| * src - "" |
| * count - the number of pgds to copy. |
| * |
| * dst and src can be on the same page, but the range must not overlap, |
| * and must not cross a page boundary. |
| */ |
| static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| { |
| memcpy(dst, src, count * sizeof(pgd_t)); |
| #ifdef CONFIG_PAGE_TABLE_ISOLATION |
| if (!static_cpu_has(X86_FEATURE_PTI)) |
| return; |
| /* Clone the user space pgd as well */ |
| memcpy(kernel_to_user_pgdp(dst), kernel_to_user_pgdp(src), |
| count * sizeof(pgd_t)); |
| #endif |
| } |
| |
| #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
| static inline int page_level_shift(enum pg_level level) |
| { |
| return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; |
| } |
| static inline unsigned long page_level_size(enum pg_level level) |
| { |
| return 1UL << page_level_shift(level); |
| } |
| static inline unsigned long page_level_mask(enum pg_level level) |
| { |
| return ~(page_level_size(level) - 1); |
| } |
| |
| /* |
| * The x86 doesn't have any external MMU info: the kernel page |
| * tables contain all the necessary information. |
| */ |
| static inline void update_mmu_cache(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep) |
| { |
| } |
| static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
| unsigned long addr, pmd_t *pmd) |
| { |
| } |
| static inline void update_mmu_cache_pud(struct vm_area_struct *vma, |
| unsigned long addr, pud_t *pud) |
| { |
| } |
| |
| #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
| static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
| { |
| return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
| } |
| |
| static inline int pte_swp_soft_dirty(pte_t pte) |
| { |
| return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
| } |
| |
| static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) |
| { |
| return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
| } |
| |
| #ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION |
| static inline pmd_t pmd_swp_mksoft_dirty(pmd_t pmd) |
| { |
| return pmd_set_flags(pmd, _PAGE_SWP_SOFT_DIRTY); |
| } |
| |
| static inline int pmd_swp_soft_dirty(pmd_t pmd) |
| { |
| return pmd_flags(pmd) & _PAGE_SWP_SOFT_DIRTY; |
| } |
| |
| static inline pmd_t pmd_swp_clear_soft_dirty(pmd_t pmd) |
| { |
| return pmd_clear_flags(pmd, _PAGE_SWP_SOFT_DIRTY); |
| } |
| #endif |
| #endif |
| |
| #define PKRU_AD_BIT 0x1 |
| #define PKRU_WD_BIT 0x2 |
| #define PKRU_BITS_PER_PKEY 2 |
| |
| static inline bool __pkru_allows_read(u32 pkru, u16 pkey) |
| { |
| int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY; |
| return !(pkru & (PKRU_AD_BIT << pkru_pkey_bits)); |
| } |
| |
| static inline bool __pkru_allows_write(u32 pkru, u16 pkey) |
| { |
| int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY; |
| /* |
| * Access-disable disables writes too so we need to check |
| * both bits here. |
| */ |
| return !(pkru & ((PKRU_AD_BIT|PKRU_WD_BIT) << pkru_pkey_bits)); |
| } |
| |
| static inline u16 pte_flags_pkey(unsigned long pte_flags) |
| { |
| #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS |
| /* ifdef to avoid doing 59-bit shift on 32-bit values */ |
| return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0; |
| #else |
| return 0; |
| #endif |
| } |
| |
| static inline bool __pkru_allows_pkey(u16 pkey, bool write) |
| { |
| u32 pkru = read_pkru(); |
| |
| if (!__pkru_allows_read(pkru, pkey)) |
| return false; |
| if (write && !__pkru_allows_write(pkru, pkey)) |
| return false; |
| |
| return true; |
| } |
| |
| /* |
| * 'pteval' can come from a PTE, PMD or PUD. We only check |
| * _PAGE_PRESENT, _PAGE_USER, and _PAGE_RW in here which are the |
| * same value on all 3 types. |
| */ |
| static inline bool __pte_access_permitted(unsigned long pteval, bool write) |
| { |
| unsigned long need_pte_bits = _PAGE_PRESENT|_PAGE_USER; |
| |
| if (write) |
| need_pte_bits |= _PAGE_RW; |
| |
| if ((pteval & need_pte_bits) != need_pte_bits) |
| return 0; |
| |
| return __pkru_allows_pkey(pte_flags_pkey(pteval), write); |
| } |
| |
| #define pte_access_permitted pte_access_permitted |
| static inline bool pte_access_permitted(pte_t pte, bool write) |
| { |
| return __pte_access_permitted(pte_val(pte), write); |
| } |
| |
| #define pmd_access_permitted pmd_access_permitted |
| static inline bool pmd_access_permitted(pmd_t pmd, bool write) |
| { |
| return __pte_access_permitted(pmd_val(pmd), write); |
| } |
| |
| #define pud_access_permitted pud_access_permitted |
| static inline bool pud_access_permitted(pud_t pud, bool write) |
| { |
| return __pte_access_permitted(pud_val(pud), write); |
| } |
| |
| #define __HAVE_ARCH_PFN_MODIFY_ALLOWED 1 |
| extern bool pfn_modify_allowed(unsigned long pfn, pgprot_t prot); |
| |
| static inline bool arch_has_pfn_modify_check(void) |
| { |
| return boot_cpu_has_bug(X86_BUG_L1TF); |
| } |
| |
| #include <asm-generic/pgtable.h> |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif /* _ASM_X86_PGTABLE_H */ |
