Waiman Long
5aba0ad64e
x86/speculation: Fix incorrect MDS/TAA mitigation status ...
commit 64870ed1b12e235cfca3f6c6da75b542c973ff78 upstream.
For MDS vulnerable processors with TSX support, enabling either MDS or
TAA mitigations will enable the use of VERW to flush internal processor
buffers at the right code path. IOW, they are either both mitigated
or both not. However, if the command line options are inconsistent,
the vulnerabilites sysfs files may not report the mitigation status
correctly.
For example, with only the "mds=off" option:
vulnerabilities/mds:Vulnerable; SMT vulnerable
vulnerabilities/tsx_async_abort:Mitigation: Clear CPU buffers; SMT vulnerable
The mds vulnerabilities file has wrong status in this case. Similarly,
the taa vulnerability file will be wrong with mds mitigation on, but
taa off.
Change taa_select_mitigation() to sync up the two mitigation status
and have them turned off if both "mds=off" and "tsx_async_abort=off"
are present.
Update documentation to emphasize the fact that both "mds=off" and
"tsx_async_abort=off" have to be specified together for processors that
are affected by both TAA and MDS to be effective.
[ bp: Massage and add kernel-parameters.txt change too. ]
Fixes: 1b42f017415b ("x86/speculation/taa: Add mitigation for TSX Async Abort")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: linux-doc@vger.kernel.org
Cc: Mark Gross <mgross@linux.intel.com>
Cc: <stable@vger.kernel.org>
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191115161445.30809-2-longman@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-28 18:29:03 +01:00
docs-rst: sphinxify 802.11 documentation
2016-10-11 16:19:17 -06:00
x86/bugs: Add ITLB_MULTIHIT bug infrastructure
2019-11-16 10:29:54 +01:00
tools: move accounting tool from Documentation
2016-09-23 13:07:15 -06:00
Merge branches 'acpi-button', 'acpi-battery' and 'acpi-doc'
2016-10-02 01:40:20 +02:00
ARM: 8833/1: Ensure that NEON code always compiles with Clang
2019-04-05 22:29:11 +02:00
arm64: Add work around for Arm Cortex-A55 Erratum 1024718
2018-05-16 10:08:42 +02:00
samples: move auxdisplay example code from Documentation
2016-09-23 11:52:32 -06:00
samples: move blackfin gptimers-example from Documentation
2016-10-10 07:12:02 -06:00
block: remove remnant refs to hardsect
2016-09-14 08:44:57 -06:00
zram: cosmetic: cleanup documentation
2016-07-26 16:19:19 -07:00
Three fixes for the docs build, including removing an annoying warning on
2016-08-07 10:23:17 -04:00
samples: connector: from Documentation to samples directory
2016-04-28 07:47:35 -06:00
cpufreq-stats: Minor documentation fix
2016-09-08 23:05:07 +02:00
crypto: doc - Fix typo
2016-05-31 16:41:55 +08:00
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
2016-10-11 15:06:33 -07:00
docs-rst: add inter-document cross references
2016-09-21 15:43:09 -06:00
dm thin: fix documentation relative to low water mark threshold
2018-05-30 07:50:20 +02:00
arm64: dts: marvell: Fix A37xx UART0 register size
2019-08-04 09:33:44 +02:00
dmaengine: documentation to the new callback mechanism
2016-08-08 08:11:42 +05:30
A single commit converting the mac80211 DocBook template over to Sphinx.
2016-10-14 14:11:22 -07:00
docs: Don't format internal MPT docs
2016-09-06 09:15:48 -06:00
power supply and reset changes for the v4.9 series
2016-10-06 18:21:15 -07:00
Documentation: fb: fix spelling mistakes
2016-05-10 12:05:27 +03:00
Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
2016-10-13 17:19:19 +02:00
mm, proc: be more verbose about unstable VMA flags in /proc/<pid>/smaps
2019-01-26 09:38:36 +01:00
Documentation: fix common spelling mistakes
2016-04-28 07:51:59 -06:00
gpio/board.txt: point to gpiod_set_value
2016-10-20 14:14:11 +02:00
Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux
2016-10-11 18:12:22 -07:00
Documentation: HID: Intel ISH HID document
2016-08-17 11:13:07 +02:00
x86/speculation: Fix incorrect MDS/TAA mitigation status
2019-11-28 18:29:03 +01:00
hwmon: (ina2xx) fix sysfs shunt resistor read access
2018-10-03 17:01:52 -07:00
i2c: Documentation: i2c-topology: fix minor whitespace nit
2016-11-10 21:18:56 +01:00
selftests: move ia64 tests from Documentation/ia64
2016-09-20 09:58:12 -06:00
iio: Documentation: Correct the path used to create triggers.
2016-10-01 00:49:58 -06:00
IB/hfi1: Document new sysfs entries for hfi1 driver
2016-10-02 08:42:19 -04:00
Input: ALPS - add V8 protocol documentation
2016-10-04 11:47:02 -07:00
doc: ioctl: Add some clarifications to botching-up-ioctls
2016-09-06 06:00:22 -06:00
Documentatio: HOWTO: remove regression postings info from translations
2016-04-16 10:49:08 -06:00
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2016-10-14 14:26:58 -07:00
Documentation: kdump: Add description of enable multi-cpus support
2016-09-20 18:02:54 -06:00
locking/Documentation: Add Korean translation
2016-08-12 08:24:14 +02:00
tools: move laptops dslm tool from Documentation
2016-09-23 13:07:21 -06:00
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
2016-10-04 10:25:53 -07:00
Documentation: livepatch: add section about arch-specific code
2016-08-18 23:41:56 +02:00
locking/lglock: Remove lglock implementation
2016-09-22 15:25:56 +02:00
videodev2.h: go back to limited range Y'CbCr for SRGB and, ADOBERGB
2017-02-23 17:44:37 +01:00
samples: move mic/mpssd example code from Documentation
2016-09-20 12:38:48 -06:00
samples: move misc-devices/mei example code from Documentation
2016-09-23 11:51:43 -06:00
mmc: core: Extend sysfs with DSR register
2016-07-25 10:34:51 +02:00
tcp: add tcp_min_snd_mss sysctl
2019-06-17 19:53:33 +02:00
libnvdimm, btt: update the usage section in Documentation
2016-06-17 16:23:23 -07:00
PCI changes for the v4.9 merge window:
2016-10-07 11:46:37 -07:00
tools: move pcmcia crc32hash tool from Documentation
2016-09-23 13:07:27 -06:00
perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver
2016-09-15 11:20:55 -07:00
power supply and reset changes for the v4.9 series
2016-10-06 18:21:15 -07:00
powerpc updates for 4.9
2016-10-07 20:19:31 -07:00
Documentation: pps: fix spelling mistake
2016-04-28 07:23:59 -06:00
selftests: move prctl tests from Documentation/prctl
2016-09-20 09:09:09 -06:00
selftests: move ptp tests from Documentation/ptp
2016-09-20 09:54:38 -06:00
rapidio/documentation/mport_cdev: add missing parameter description
2016-09-01 17:52:02 -07:00
kthread: kthread worker API cleanup
2016-10-11 15:06:33 -07:00
s390/Documentation: improve sort command for trace buffer
2016-06-13 15:58:23 +02:00
sched/deadline: Document behavior of sched_yield()
2016-09-10 11:17:41 +02:00
scsi: g_NCR5380: Stop using scsi_module.c
2016-09-29 21:52:43 -04:00
Some big changes this month, headlined by the addition of a new formatted
2016-07-26 13:05:11 -07:00
Documentation: rs485: Do not define manually the ioctl
2016-08-18 11:08:33 -06:00
ASoC: Updates for v4.8
2016-07-26 10:35:31 +02:00
docs: sphinx-extensions: make rstFlatTable work with docutils 0.13
2017-01-09 08:32:18 +01:00
This is the documentation update pull for the 4.9 merge window.
2016-10-04 13:54:07 -07:00
Doc: update 00-INDEX files to reflect the runnable code move
2016-10-10 07:12:09 -06:00
bpf: add bpf_jit_limit knob to restrict unpriv allocations
2019-08-25 10:51:41 +02:00
target: make close_session optional
2016-05-10 01:19:26 -07:00
thermal: Add support for hardware-tracked trip points
2016-09-27 14:02:16 +08:00
Doc: update 00-INDEX files to reflect the runnable code move
2016-10-10 07:12:09 -06:00
tpm: Add documentation for the tpm_vtpm_proxy device driver
2016-06-25 17:26:35 +03:00
This release cycle is rather small. Just a few fixes to tracing.
2016-10-06 11:48:41 -07:00
USB: rio500: Remove Rio 500 kernel driver
2019-10-17 13:42:26 -07:00
kvm: Convert kvm_lock to a mutex
2019-11-16 10:29:49 +01:00
Three fixes for the docs build, including removing an annoying warning on
2016-08-07 10:23:17 -04:00
w1: add ability to set (SRAM) and store (EEPROM) configuration for temp sensors like DS18B20
2016-05-01 14:37:49 -07:00
linux-kselftest-4.9-rc1-update
2016-10-14 15:17:12 -07:00
x86/speculation/taa: Add documentation for TSX Async Abort
2019-11-16 10:29:46 +01:00
xtensa: cleanup MMU setup and kernel layout macros
2016-07-24 06:33:58 +03:00
docs: deprecate kernel-doc-nano-HOWTO.txt
2016-07-20 16:45:37 -06:00
Add .pyc files to .gitignore
2016-06-30 13:07:33 -06:00
Doc: update 00-INDEX files to reflect the runnable code move
2016-10-10 07:12:09 -06:00
documentation: trivial typo: adding-syscalls.txt: s/statat/fstatat/
2016-04-18 11:31:49 -06:00
docs: Clean up bare :: lines
2016-09-20 18:46:36 -06:00
bcache: documentation formatting, edited for clarity, stripe alignment notes
2016-06-23 07:58:38 -06:00
binfmt_misc: add F option description to documentation
2016-03-30 14:12:22 -07:00
Merge branch 'for-4.6-ns' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2016-03-21 10:05:13 -07:00
kbuild: verify that $DEPMOD is installed
2018-08-17 20:59:29 +02:00
Documentation: clk: update file names containing referenced structures
2016-08-14 12:12:36 -06:00
URL changed for Linux Foundation TAB
2016-10-01 00:57:13 -06:00
docs: Remove space-before-label guidance from CodingStyle
2016-09-21 15:53:31 -06:00
docs: Fix conf.py for Sphinx 2.0
2019-06-11 12:22:43 +02:00
topology/sysfs: provide drawer id and siblings attributes
2016-06-13 15:58:27 +02:00
Documentation: update the devices.txt documentation
2016-03-29 10:11:44 -07:00
Documentation: DMA-API-HOWTO: Fix a typo
2016-09-20 17:58:46 -06:00
dma-mapping: add dma_{map,unmap}_resource
2016-09-26 22:16:41 +05:30
dma-mapping: introduce the DMA_ATTR_NO_WARN attribute
2016-10-11 15:06:32 -07:00
doc-rst: add docutils config file
2016-08-14 11:52:40 -06:00
GCC plugin infrastructure
2016-06-07 22:57:10 +02:00
Documentation/email-clients.txt: convert it to ReST markup
2016-09-21 15:41:50 -06:00
GCC plugin infrastructure
2016-06-07 22:57:10 +02:00
docs: Clean up bare :: lines
2016-09-20 18:46:36 -06:00
Documentation: Move L1TF to separate directory
2019-05-14 19:19:41 +02:00
Documentation/IRQ-domain.txt: Document irq_domain_create_{linear, tree}
2016-03-31 00:32:59 -06:00
Documentation: Add ISA bus driver documentation
2016-05-02 09:32:04 -07:00
docs: deprecate kernel-doc-nano-HOWTO.txt
2016-07-20 16:45:37 -06:00
Documentation/kernel-docs.txt: reorder based on timestamp
2016-09-20 18:54:42 -06:00
This is the documentation update pull for the 4.9 merge window.
2016-10-04 13:54:07 -07:00
x86/speculation: Fix incorrect MDS/TAA mitigation status
2019-11-28 18:29:03 +01:00
Documenation: update cgroup's document path
2016-08-03 15:43:58 -06:00
Documentation: kprobes: Document jprobes stack copying limitations
2016-08-15 10:19:11 -06:00
kselftest: kselftest documentation improvement
2016-09-20 08:58:27 -06:00
Documentation: lzo: fix spelling mistakes
2016-04-28 07:23:11 -06:00
samples: move blackfin gptimers-example from Documentation
2016-10-10 07:12:02 -06:00
doc-rst: generic way to build PDF of sub-folders
2016-09-01 08:49:23 -06:00
Documentation/HOWTO: add cross-references to other documents
2016-09-20 18:41:04 -06:00
md-cluster: change array_sectors and update size are not supported
2016-05-04 12:39:35 -07:00
Documentation: fix wrong value in md.txt
2016-06-23 08:08:36 -06:00
locking/Documentation: Fix a typo of example result
2016-08-12 08:24:13 +02:00
memory_hotplug: introduce CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE
2016-05-19 19:12:14 -07:00
Documentation/module-signing.txt: Note need for version info if reusing a key
2016-07-27 12:38:00 +09:30
phy: core: Allow children node to be overridden
2016-04-29 16:39:39 +02:00
pinctrl: Flag strict is a field in struct pinmux_ops
2016-06-23 10:50:10 +02:00
lib/vsprintf: Remove atomic-unsafe support for %pCr
2018-07-03 11:23:06 +02:00
pwm: Update documentation
2016-05-17 14:48:04 +02:00
ramoops: use DT reserved-memory bindings
2016-08-05 11:21:36 -07:00
remoteproc: Split driver and consumer dereferencing
2016-10-02 22:50:21 -07:00
Documentation: robust-futexes: fix spelling mistakes
2016-04-28 07:26:41 -06:00
rpmsg: use module_rpmsg_driver in existing drivers and examples
2016-05-06 11:09:01 -07:00
Documentation/HOWTO: add cross-references to other documents
2016-09-20 18:41:04 -06:00
siphash: implement HalfSipHash1-3 for hash tables
2019-08-25 10:51:42 +02:00
x86/speculation: Add prctl() control for indirect branch speculation
2019-05-14 19:19:39 +02:00
Documentation: Document array_index_nospec
2018-02-13 12:35:59 +01:00
Documentation/HOWTO: add cross-references to other documents
2016-09-20 18:41:04 -06:00
Documentation: stable-kernel-rules: fix stable-tag format
2017-04-12 12:41:15 +02:00
jump_labels: Allow array initialisers
2016-09-07 09:41:11 +01:00
docs-rst: add inter-document cross references
2016-09-21 15:43:09 -06:00
docs-rst: add inter-document cross references
2016-09-21 15:43:09 -06:00
docs-rst: add inter-document cross references
2016-09-21 15:43:09 -06:00
Documentation: add doc for sync_file_get_fence()
2016-08-11 15:33:24 +05:30
Doc: correct the location of sysrq.c
2016-04-28 08:02:36 -06:00
vme: Update documentation to match api
2016-08-31 13:20:16 +02:00
workqueue: Fix a typo in workqueue.txt
2016-07-06 02:37:38 -06:00
Documentation: xillybus: fix spelling mistake
2016-04-28 07:44:54 -06:00
5aba0ad64e
