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Signed-off-by: Yang Shi --- arch/arm64/mm/kasan_init.c | 45 ++++++++++++++++++++++++-------------- 1 file changed, 29 insertions(+), 16 deletions(-) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index 3fcad956fdf7..960020343760 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -60,13 +60,14 @@ static phys_addr_t __init kasan_alloc_raw_page(int node) } static pte_t *__init kasan_pte_offset(pmd_t *pmdp, unsigned long addr, int node, - bool early) + bool early, pgtbl_mod_mask *mask) { if (pmd_none(READ_ONCE(*pmdp))) { phys_addr_t pte_phys = early ? __pa_symbol(kasan_early_shadow_pte) : kasan_alloc_zeroed_page(node); __pmd_populate(pmdp, pte_phys, PMD_TYPE_TABLE); + *mask |= PGTBL_PMD_MODIFIED; } return early ? pte_offset_kimg(pmdp, addr) @@ -74,49 +75,53 @@ static pte_t *__init kasan_pte_offset(pmd_t *pmdp, unsigned long addr, int node, } static pmd_t *__init kasan_pmd_offset(pud_t *pudp, unsigned long addr, int node, - bool early) + bool early, pgtbl_mod_mask *mask) { if (pud_none(READ_ONCE(*pudp))) { phys_addr_t pmd_phys = early ? __pa_symbol(kasan_early_shadow_pmd) : kasan_alloc_zeroed_page(node); __pud_populate(pudp, pmd_phys, PUD_TYPE_TABLE); + *mask |= PGTBL_PUD_MODIFIED; } return early ? pmd_offset_kimg(pudp, addr) : pmd_offset(pudp, addr); } static pud_t *__init kasan_pud_offset(p4d_t *p4dp, unsigned long addr, int node, - bool early) + bool early, pgtbl_mod_mask *mask) { if (p4d_none(READ_ONCE(*p4dp))) { phys_addr_t pud_phys = early ? __pa_symbol(kasan_early_shadow_pud) : kasan_alloc_zeroed_page(node); __p4d_populate(p4dp, pud_phys, P4D_TYPE_TABLE); + *mask |= PGTBL_P4D_MODIFIED; } return early ? pud_offset_kimg(p4dp, addr) : pud_offset(p4dp, addr); } static p4d_t *__init kasan_p4d_offset(pgd_t *pgdp, unsigned long addr, int node, - bool early) + bool early, pgtbl_mod_mask *mask) { if (pgd_none(READ_ONCE(*pgdp))) { phys_addr_t p4d_phys = early ? __pa_symbol(kasan_early_shadow_p4d) : kasan_alloc_zeroed_page(node); __pgd_populate(pgdp, p4d_phys, PGD_TYPE_TABLE); + *mask |= PGTBL_PGD_MODIFIED; } return early ? p4d_offset_kimg(pgdp, addr) : p4d_offset(pgdp, addr); } static void __init kasan_pte_populate(pmd_t *pmdp, unsigned long addr, - unsigned long end, int node, bool early) + unsigned long end, int node, bool early, + pgtbl_mod_mask *mask) { unsigned long next; - pte_t *ptep = kasan_pte_offset(pmdp, addr, node, early); + pte_t *ptep = kasan_pte_offset(pmdp, addr, node, early, mask); do { phys_addr_t page_phys = early ? @@ -130,38 +135,41 @@ static void __init kasan_pte_populate(pmd_t *pmdp, unsigned long addr, } static void __init kasan_pmd_populate(pud_t *pudp, unsigned long addr, - unsigned long end, int node, bool early) + unsigned long end, int node, bool early, + pgtbl_mod_mask *mask) { unsigned long next; - pmd_t *pmdp = kasan_pmd_offset(pudp, addr, node, early); + pmd_t *pmdp = kasan_pmd_offset(pudp, addr, node, early, mask); do { next = pmd_addr_end(addr, end); - kasan_pte_populate(pmdp, addr, next, node, early); + kasan_pte_populate(pmdp, addr, next, node, early, mask); } while (pmdp++, addr = next, addr != end && pmd_none(READ_ONCE(*pmdp))); } static void __init kasan_pud_populate(p4d_t *p4dp, unsigned long addr, - unsigned long end, int node, bool early) + unsigned long end, int node, bool early, + pgtbl_mod_mask *mask) { unsigned long next; - pud_t *pudp = kasan_pud_offset(p4dp, addr, node, early); + pud_t *pudp = kasan_pud_offset(p4dp, addr, node, early, mask); do { next = pud_addr_end(addr, end); - kasan_pmd_populate(pudp, addr, next, node, early); + kasan_pmd_populate(pudp, addr, next, node, early, mask); } while (pudp++, addr = next, addr != end && pud_none(READ_ONCE(*pudp))); } static void __init kasan_p4d_populate(pgd_t *pgdp, unsigned long addr, - unsigned long end, int node, bool early) + unsigned long end, int node, bool early, + pgtbl_mod_mask *mask) { unsigned long next; - p4d_t *p4dp = kasan_p4d_offset(pgdp, addr, node, early); + p4d_t *p4dp = kasan_p4d_offset(pgdp, addr, node, early, mask); do { next = p4d_addr_end(addr, end); - kasan_pud_populate(p4dp, addr, next, node, early); + kasan_pud_populate(p4dp, addr, next, node, early, mask); } while (p4dp++, addr = next, addr != end && p4d_none(READ_ONCE(*p4dp))); } @@ -170,12 +178,17 @@ static void __init kasan_pgd_populate(unsigned long addr, unsigned long end, { unsigned long next; pgd_t *pgdp; + pgtbl_mod_mask mask = 0; + unsigned long start = addr; pgdp = pgd_offset_k(addr); do { next = pgd_addr_end(addr, end); - kasan_p4d_populate(pgdp, addr, next, node, early); + kasan_p4d_populate(pgdp, addr, next, node, early, &mask); } while (pgdp++, addr = next, addr != end); + + if (mask & ARCH_PAGE_TABLE_SYNC_MASK) + arch_sync_kernel_mappings(start, end); } #if defined(CONFIG_ARM64_64K_PAGES) || CONFIG_PGTABLE_LEVELS > 4 -- 2.47.0