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Filename Latest commit message Latest commit date
Rick Edgecombe f82a301322 x86/mm/cpa: Flush direct map alias during cpa 
[ Upstream commit ab5130186d7476dcee0d4e787d19a521ca552ce9 ]

As an optimization, cpa_flush() was changed to optionally only flush
the range in @cpa if it was small enough.  However, this range does
not include any direct map aliases changed in cpa_process_alias(). So
small set_memory_() calls that touch that alias don't get the direct
map changes flushed. This situation can happen when the virtual
address taking variants are passed an address in vmalloc or modules
space.

In these cases, force a full TLB flush.

Note this issue does not extend to cases where the set_memory_() calls are
passed a direct map address, or page array, etc, as the primary target. In
those cases the direct map would be flushed.

Fixes: 935f583982 ("x86/mm/cpa: Optimize cpa_flush_array() TLB invalidation")
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200424105343.GA20730@hirez.programming.kicks-ass.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-05-27 17:46:32 +02:00
arch x86/mm/cpa: Flush direct map alias during cpa 2020-05-27 17:46:32 +02:00
block
certs
crypto gcc-10: avoid shadowing standard library 'free()' in crypto 2020-05-20 08:20:29 +02:00
Documentation
drivers HID: i2c-hid: reset Synaptics SYNA2393 on resume 2020-05-27 17:46:32 +02:00
fs configfs: fix config_item refcnt leak in configfs_rmdir() 2020-05-27 17:46:30 +02:00
include net: drop_monitor: use IS_REACHABLE() to guard net_dm_hw_report() 2020-05-27 17:46:24 +02:00
init x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:20:16 +02:00
kernel Stop the ad-hoc games with -Wno-maybe-initialized 2020-05-20 08:20:28 +02:00
lib
LICENSES
mm
net bpf: Fix sk_psock refcnt leak when receiving message 2020-05-20 08:20:39 +02:00
samples
scripts gcc-common.h: Update for GCC 10 2020-05-27 17:46:24 +02:00
security evm: Fix a small race in init_desc() 2020-05-27 17:46:17 +02:00
sound Revert "ALSA: hda/realtek: Fix pop noise on ALC225" 2020-05-20 08:20:36 +02:00
tools bpf: Test_progs, fix test_get_stack_rawtp_err.c build 2020-05-20 08:20:41 +02:00
usr
virt KVM: arm: vgic: Synchronize the whole guest on GIC{D,R}_I{S,C}ACTIVER read 2020-05-20 08:20:04 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile kbuild: avoid concurrency issue in parallel building dtbs and dtbs_check 2020-05-27 17:46:23 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.