diff options
Diffstat (limited to 'arch/powerpc/mm/ptdump/ptdump.c')
| -rw-r--r-- | arch/powerpc/mm/ptdump/ptdump.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c index 98d82dcf6f0b..5fc880e30175 100644 --- a/arch/powerpc/mm/ptdump/ptdump.c +++ b/arch/powerpc/mm/ptdump/ptdump.c @@ -23,6 +23,7 @@ #include <linux/const.h> #include <asm/page.h> #include <asm/pgalloc.h> +#include <asm/hugetlb.h> #include <mm/mmu_decl.h> @@ -269,6 +270,26 @@ static void walk_pte(struct pg_state *st, pmd_t *pmd, unsigned long start) } } +static void walk_hugepd(struct pg_state *st, hugepd_t *phpd, unsigned long start, + int pdshift, int level) +{ +#ifdef CONFIG_ARCH_HAS_HUGEPD + unsigned int i; + int shift = hugepd_shift(*phpd); + int ptrs_per_hpd = pdshift - shift > 0 ? 1 << (pdshift - shift) : 1; + + if (start & ((1 << shift) - 1)) + return; + + for (i = 0; i < ptrs_per_hpd; i++) { + unsigned long addr = start + (i << shift); + pte_t *pte = hugepte_offset(*phpd, addr, pdshift); + + note_page(st, addr, level + 1, pte_val(*pte), 1 << shift); + } +#endif +} + static void walk_pmd(struct pg_state *st, pud_t *pud, unsigned long start) { pmd_t *pmd = pmd_offset(pud, 0); @@ -312,11 +333,13 @@ static void walk_pagetables(struct pg_state *st) * the hash pagetable. */ for (i = pgd_index(addr); i < PTRS_PER_PGD; i++, pgd++, addr += PGDIR_SIZE) { - if (!pgd_none(*pgd) && !pgd_is_leaf(*pgd)) + if (pgd_none(*pgd) || pgd_is_leaf(*pgd)) + note_page(st, addr, 1, pgd_val(*pgd), PGDIR_SIZE); + else if (is_hugepd(__hugepd(pgd_val(*pgd)))) + walk_hugepd(st, (hugepd_t *)pgd, addr, PGDIR_SHIFT, 1); + else /* pgd exists */ walk_pud(st, pgd, addr); - else - note_page(st, addr, 1, pgd_val(*pgd), PGDIR_SIZE); } } |