Messages in this thread | | | From | Toshi Kani <> | Subject | [PATCH v2 0/3] fix free pmd/pte page handlings on x86 | Date | Tue, 15 May 2018 15:39:28 -0600 |
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This series fixes two issues in the x86 ioremap free page handlings for pud/pmd mappings.
Patch 01 fixes BUG_ON on x86-PAE reported by Joerg. It disables the free page handling on x86-PAE.
Patch 02-03 fixes a possible issue with speculation which can cause stale page-directory cache. - Patch 02 is from Chintan's v9 01/04 patch [1], which adds a new arg 'addr'. This avoids merge conflicts with his series. - Patch 03 adds a TLB purge (INVLPG) to purge page-structure caches that may be cached by speculation. See the patch descriptions for more detal.
[1] https://patchwork.kernel.org/patch/10371015/
v2: - Reordered patch-set, so that patch 01 can be applied independently. - Added a NULL pointer check for the page alloc in patch 03.
--- Toshi Kani (2): 1/3 x86/mm: disable ioremap free page handling on x86-PAE 3/3 x86/mm: add TLB purge to free pmd/pte page interfaces
Chintan Pandya (1): 2/3 ioremap: Update pgtable free interfaces with addr
--- arch/arm64/mm/mmu.c | 4 +-- arch/x86/mm/pgtable.c | 59 +++++++++++++++++++++++++++++++++++++------ include/asm-generic/pgtable.h | 8 +++--- lib/ioremap.c | 4 +-- 4 files changed, 59 insertions(+), 16 deletions(-)
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