diff options
Diffstat (limited to 'arch/powerpc/mm/ptdump/hashpagetable.c')
-rw-r--r-- | arch/powerpc/mm/ptdump/hashpagetable.c | 49 |
1 files changed, 26 insertions, 23 deletions
diff --git a/arch/powerpc/mm/ptdump/hashpagetable.c b/arch/powerpc/mm/ptdump/hashpagetable.c index a07278027c6f..9a601587836b 100644 --- a/arch/powerpc/mm/ptdump/hashpagetable.c +++ b/arch/powerpc/mm/ptdump/hashpagetable.c @@ -15,13 +15,12 @@ #include <linux/mm.h> #include <linux/sched.h> #include <linux/seq_file.h> -#include <asm/pgtable.h> #include <linux/const.h> #include <asm/page.h> -#include <asm/pgalloc.h> #include <asm/plpar_wrappers.h> #include <linux/memblock.h> #include <asm/firmware.h> +#include <asm/pgalloc.h> struct pg_state { struct seq_file *seq; @@ -239,7 +238,10 @@ static int native_find(unsigned long ea, int psize, bool primary, u64 *v, u64 static int pseries_find(unsigned long ea, int psize, bool primary, u64 *v, u64 *r) { - struct hash_pte ptes[4]; + struct { + unsigned long v; + unsigned long r; + } ptes[4]; unsigned long vsid, vpn, hash, hpte_group, want_v; int i, j, ssize = mmu_kernel_ssize; long lpar_rc = 0; @@ -259,7 +261,7 @@ static int pseries_find(unsigned long ea, int psize, bool primary, u64 *v, u64 * for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) { lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes); - if (lpar_rc != H_SUCCESS) + if (lpar_rc) continue; for (j = 0; j < 4; j++) { if (HPTE_V_COMPARE(ptes[j].v, want_v) && @@ -417,9 +419,9 @@ static void walk_pmd(struct pg_state *st, pud_t *pud, unsigned long start) } } -static void walk_pud(struct pg_state *st, pgd_t *pgd, unsigned long start) +static void walk_pud(struct pg_state *st, p4d_t *p4d, unsigned long start) { - pud_t *pud = pud_offset(pgd, 0); + pud_t *pud = pud_offset(p4d, 0); unsigned long addr; unsigned int i; @@ -431,6 +433,20 @@ static void walk_pud(struct pg_state *st, pgd_t *pgd, unsigned long start) } } +static void walk_p4d(struct pg_state *st, pgd_t *pgd, unsigned long start) +{ + p4d_t *p4d = p4d_offset(pgd, 0); + unsigned long addr; + unsigned int i; + + for (i = 0; i < PTRS_PER_P4D; i++, p4d++) { + addr = start + i * P4D_SIZE; + if (!p4d_none(*p4d)) + /* p4d exists */ + walk_pud(st, p4d, addr); + } +} + static void walk_pagetables(struct pg_state *st) { pgd_t *pgd = pgd_offset_k(0UL); @@ -445,7 +461,7 @@ static void walk_pagetables(struct pg_state *st) addr = KERN_VIRT_START + i * PGDIR_SIZE; if (!pgd_none(*pgd)) /* pgd exists */ - walk_pud(st, pgd, addr); + walk_p4d(st, pgd, addr); } } @@ -513,27 +529,14 @@ static int ptdump_show(struct seq_file *m, void *v) return 0; } -static int ptdump_open(struct inode *inode, struct file *file) -{ - return single_open(file, ptdump_show, NULL); -} - -static const struct file_operations ptdump_fops = { - .open = ptdump_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(ptdump); static int ptdump_init(void) { - struct dentry *debugfs_file; - if (!radix_enabled()) { populate_markers(); - debugfs_file = debugfs_create_file("kernel_hash_pagetable", - 0400, NULL, NULL, &ptdump_fops); - return debugfs_file ? 0 : -ENOMEM; + debugfs_create_file("kernel_hash_pagetable", 0400, NULL, NULL, + &ptdump_fops); } return 0; } |