diff options
Diffstat (limited to 'lib/ioremap.c')
-rw-r--r-- | lib/ioremap.c | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/lib/ioremap.c b/lib/ioremap.c index 3f0e18543de8..5ee3526f71b8 100644 --- a/lib/ioremap.c +++ b/lib/ioremap.c @@ -12,7 +12,6 @@ #include <linux/io.h> #include <linux/export.h> #include <asm/cacheflush.h> -#include <asm/pgtable.h> #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP static int __read_mostly ioremap_p4d_capable; @@ -61,13 +60,14 @@ static inline int ioremap_pmd_enabled(void) { return 0; } #endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ static int ioremap_pte_range(pmd_t *pmd, unsigned long addr, - unsigned long end, phys_addr_t phys_addr, pgprot_t prot) + unsigned long end, phys_addr_t phys_addr, pgprot_t prot, + pgtbl_mod_mask *mask) { pte_t *pte; u64 pfn; pfn = phys_addr >> PAGE_SHIFT; - pte = pte_alloc_kernel(pmd, addr); + pte = pte_alloc_kernel_track(pmd, addr, mask); if (!pte) return -ENOMEM; do { @@ -75,6 +75,7 @@ static int ioremap_pte_range(pmd_t *pmd, unsigned long addr, set_pte_at(&init_mm, addr, pte, pfn_pte(pfn, prot)); pfn++; } while (pte++, addr += PAGE_SIZE, addr != end); + *mask |= PGTBL_PTE_MODIFIED; return 0; } @@ -101,21 +102,24 @@ static int ioremap_try_huge_pmd(pmd_t *pmd, unsigned long addr, } static inline int ioremap_pmd_range(pud_t *pud, unsigned long addr, - unsigned long end, phys_addr_t phys_addr, pgprot_t prot) + unsigned long end, phys_addr_t phys_addr, pgprot_t prot, + pgtbl_mod_mask *mask) { pmd_t *pmd; unsigned long next; - pmd = pmd_alloc(&init_mm, pud, addr); + pmd = pmd_alloc_track(&init_mm, pud, addr, mask); if (!pmd) return -ENOMEM; do { next = pmd_addr_end(addr, end); - if (ioremap_try_huge_pmd(pmd, addr, next, phys_addr, prot)) + if (ioremap_try_huge_pmd(pmd, addr, next, phys_addr, prot)) { + *mask |= PGTBL_PMD_MODIFIED; continue; + } - if (ioremap_pte_range(pmd, addr, next, phys_addr, prot)) + if (ioremap_pte_range(pmd, addr, next, phys_addr, prot, mask)) return -ENOMEM; } while (pmd++, phys_addr += (next - addr), addr = next, addr != end); return 0; @@ -144,21 +148,24 @@ static int ioremap_try_huge_pud(pud_t *pud, unsigned long addr, } static inline int ioremap_pud_range(p4d_t *p4d, unsigned long addr, - unsigned long end, phys_addr_t phys_addr, pgprot_t prot) + unsigned long end, phys_addr_t phys_addr, pgprot_t prot, + pgtbl_mod_mask *mask) { pud_t *pud; unsigned long next; - pud = pud_alloc(&init_mm, p4d, addr); + pud = pud_alloc_track(&init_mm, p4d, addr, mask); if (!pud) return -ENOMEM; do { next = pud_addr_end(addr, end); - if (ioremap_try_huge_pud(pud, addr, next, phys_addr, prot)) + if (ioremap_try_huge_pud(pud, addr, next, phys_addr, prot)) { + *mask |= PGTBL_PUD_MODIFIED; continue; + } - if (ioremap_pmd_range(pud, addr, next, phys_addr, prot)) + if (ioremap_pmd_range(pud, addr, next, phys_addr, prot, mask)) return -ENOMEM; } while (pud++, phys_addr += (next - addr), addr = next, addr != end); return 0; @@ -187,21 +194,24 @@ static int ioremap_try_huge_p4d(p4d_t *p4d, unsigned long addr, } static inline int ioremap_p4d_range(pgd_t *pgd, unsigned long addr, - unsigned long end, phys_addr_t phys_addr, pgprot_t prot) + unsigned long end, phys_addr_t phys_addr, pgprot_t prot, + pgtbl_mod_mask *mask) { p4d_t *p4d; unsigned long next; - p4d = p4d_alloc(&init_mm, pgd, addr); + p4d = p4d_alloc_track(&init_mm, pgd, addr, mask); if (!p4d) return -ENOMEM; do { next = p4d_addr_end(addr, end); - if (ioremap_try_huge_p4d(p4d, addr, next, phys_addr, prot)) + if (ioremap_try_huge_p4d(p4d, addr, next, phys_addr, prot)) { + *mask |= PGTBL_P4D_MODIFIED; continue; + } - if (ioremap_pud_range(p4d, addr, next, phys_addr, prot)) + if (ioremap_pud_range(p4d, addr, next, phys_addr, prot, mask)) return -ENOMEM; } while (p4d++, phys_addr += (next - addr), addr = next, addr != end); return 0; @@ -214,6 +224,7 @@ int ioremap_page_range(unsigned long addr, unsigned long start; unsigned long next; int err; + pgtbl_mod_mask mask = 0; might_sleep(); BUG_ON(addr >= end); @@ -222,13 +233,17 @@ int ioremap_page_range(unsigned long addr, pgd = pgd_offset_k(addr); do { next = pgd_addr_end(addr, end); - err = ioremap_p4d_range(pgd, addr, next, phys_addr, prot); + err = ioremap_p4d_range(pgd, addr, next, phys_addr, prot, + &mask); if (err) break; } while (pgd++, phys_addr += (next - addr), addr = next, addr != end); flush_cache_vmap(start, end); + if (mask & ARCH_PAGE_TABLE_SYNC_MASK) + arch_sync_kernel_mappings(start, end); + return err; } |