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Message-Id: <20180516233207.1580-1-toshi.kani@hpe.com>
Date: Wed, 16 May 2018 17:32:04 -0600
From: Toshi Kani <toshi.kani@....com>
To: mhocko@...e.com, akpm@...ux-foundation.org, tglx@...utronix.de,
mingo@...hat.com, hpa@...or.com
Cc: cpandya@...eaurora.org, linux-mm@...ck.org, x86@...nel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/3] fix free pmd/pte page handlings on x86
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', with my merge change to patch 01.
- 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/
v3:
- Fixed a build error in v2.
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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