Le 16/02/2020 à 09:18, Mike Rapoport a écrit :
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and replace 5level-fixup.h with pgtable-nop4d.h.
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Tested-by: Christophe Leroy <christophe.leroy@xxxxxx> # 8xx and 83xx
---
arch/powerpc/include/asm/book3s/32/pgtable.h | 1 -
arch/powerpc/include/asm/book3s/64/hash.h | 4 +-
arch/powerpc/include/asm/book3s/64/pgalloc.h | 4 +-
arch/powerpc/include/asm/book3s/64/pgtable.h | 58 ++++++++++--------
arch/powerpc/include/asm/book3s/64/radix.h | 6 +-
arch/powerpc/include/asm/nohash/32/pgtable.h | 1 -
arch/powerpc/include/asm/nohash/64/pgalloc.h | 2 +-
.../include/asm/nohash/64/pgtable-4k.h | 32 +++++-----
arch/powerpc/include/asm/nohash/64/pgtable.h | 6 +-
arch/powerpc/include/asm/pgtable.h | 8 +++
arch/powerpc/kvm/book3s_64_mmu_radix.c | 59 ++++++++++++++++---
arch/powerpc/lib/code-patching.c | 7 ++-
arch/powerpc/mm/book3s32/mmu.c | 2 +-
arch/powerpc/mm/book3s32/tlb.c | 4 +-
arch/powerpc/mm/book3s64/hash_pgtable.c | 4 +-
arch/powerpc/mm/book3s64/radix_pgtable.c | 19 ++++--
arch/powerpc/mm/book3s64/subpage_prot.c | 6 +-
arch/powerpc/mm/hugetlbpage.c | 28 +++++----
arch/powerpc/mm/kasan/kasan_init_32.c | 8 +--
arch/powerpc/mm/mem.c | 4 +-
arch/powerpc/mm/nohash/40x.c | 4 +-
arch/powerpc/mm/nohash/book3e_pgtable.c | 15 +++--
arch/powerpc/mm/pgtable.c | 25 +++++++-
arch/powerpc/mm/pgtable_32.c | 28 +++++----
arch/powerpc/mm/pgtable_64.c | 10 ++--
arch/powerpc/mm/ptdump/hashpagetable.c | 20 ++++++-
arch/powerpc/mm/ptdump/ptdump.c | 22 ++++++-
arch/powerpc/xmon/xmon.c | 17 +++++-
28 files changed, 284 insertions(+), 120 deletions(-)
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c
index 206156255247..7bd4b81d5b5d 100644
--- a/arch/powerpc/mm/ptdump/ptdump.c
+++ b/arch/powerpc/mm/ptdump/ptdump.c
@@ -277,9 +277,9 @@ 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;
@@ -293,6 +293,22 @@ 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_is_leaf(*p4d))
+ /* p4d exists */
+ walk_pud(st, p4d, addr);
+ else
+ note_page(st, addr, 2, p4d_val(*p4d));
Level 2 is already used by walk_pud().
I think you have to increment the level used in walk_pud() and
walk_pmd() and walk_pte()
+ }
+}
+
static void walk_pagetables(struct pg_state *st)
{
unsigned int i;
@@ -306,7 +322,7 @@ static void walk_pagetables(struct pg_state *st)
for (i = pgd_index(addr); i < PTRS_PER_PGD; i++, pgd++, addr += PGDIR_SIZE) {
if (!pgd_none(*pgd) && !pgd_is_leaf(*pgd))
/* pgd exists */
- walk_pud(st, pgd, addr);
+ walk_p4d(st, pgd, addr);
else
note_page(st, addr, 1, pgd_val(*pgd));
}
Christophe
