linux-stable/Documentation
Pawan Gupta 9d0a21053c x86/bugs: Add "unknown" reporting for MMIO Stale Data
commit 7df548840c upstream.

Older Intel CPUs that are not in the affected processor list for MMIO
Stale Data vulnerabilities currently report "Not affected" in sysfs,
which may not be correct. Vulnerability status for these older CPUs is
unknown.

Add known-not-affected CPUs to the whitelist. Report "unknown"
mitigation status for CPUs that are not in blacklist, whitelist and also
don't enumerate MSR ARCH_CAPABILITIES bits that reflect hardware
immunity to MMIO Stale Data vulnerabilities.

Mitigation is not deployed when the status is unknown.

  [ bp: Massage, fixup. ]

Fixes: 8d50cdf8b8 ("x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data")
Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Suggested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/a932c154772f2121794a5f2eded1a11013114711.1657846269.git.pawan.kumar.gupta@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-08-31 17:18:14 +02:00
..
ABI xen-blkfront: Apply 'feature_persistent' parameter when connect 2022-08-17 15:16:18 +02:00
PCI
RCU Merge branch 'exp.2022.05.11a' into HEAD 2022-05-11 11:49:35 -07:00
accounting delayacct: track delays from write-protect copy 2022-06-01 15:55:25 -07:00
admin-guide x86/bugs: Add "unknown" reporting for MMIO Stale Data 2022-08-31 17:18:14 +02:00
arc
arm docs: arm: tcm: Fix typo in description of TCM and MMU usage 2022-06-09 12:56:33 -06:00
arm64 arm64: errata: Remove AES hwcap for COMPAT tasks 2022-08-17 15:14:00 +02:00
block
bpf
cdrom It was a moderately busy cycle for documentation; highlights include: 2022-05-25 11:17:41 -07:00
core-api doc: module: update file references 2022-07-01 14:50:01 -07:00
cpu-freq
crypto
dev-tools Yang Shi has improved the behaviour of khugepaged collapsing of readonly 2022-05-26 12:32:41 -07:00
devicetree dt-bindings: display: sun4i: Add D1 TCONs to conditionals 2022-08-25 11:45:36 +02:00
doc-guide Documentation/process: use scripts/get_maintainer.pl on patches 2022-05-09 16:12:16 -06:00
driver-api A NULL pointer dereference fix for vc4, and 3 patches to improve the 2022-07-01 09:27:55 +10:00
fault-injection
fb
features Documentation/features: Update the arch support status files 2022-06-09 09:35:57 -06:00
filesystems Documentation: ext4: fix cell spacing of table heading on blockmap table 2022-08-17 15:16:16 +02:00
firmware-guide Documentation: ACPI: EINJ: Fix obsolete example 2022-08-25 11:45:11 +02:00
firmware_class
fpga Documentation: fpga: dfl: add link address of feature id table 2022-05-10 16:05:27 +08:00
gpu
hid
hwmon hwmon: Make chip parameter for with_info API mandatory 2022-05-22 11:32:31 -07:00
i2c
ia64
iio
images docs: add SVG version of the Linux logo 2022-06-01 09:32:45 -06:00
infiniband
input documentation: Format button_dev as a pointer. 2022-06-01 09:34:28 -06:00
isdn
kbuild Documentation/llvm: Update Supported Arch table 2022-06-20 08:21:29 +09:00
kernel-hacking
leds leds: qcom-lpg: Require pattern to follow documentation 2022-05-24 22:08:10 +02:00
litmus-tests
livepatch doc: module: update file references 2022-07-01 14:50:01 -07:00
locking
loongarch docs/LoongArch: Fix notes rendering by using reST directives 2022-06-17 22:09:05 +08:00
m68k
maintainer
mhi
mips
misc-devices Documentation: Wire Oxford Semiconductor PCIe (Tornado) 950 2022-05-19 18:24:22 +02:00
netlabel
networking Documentation: fix sctp_wmem in ip-sysctl.rst 2022-07-24 21:41:58 +01:00
nios2
nvdimm
openrisc
parisc
pcmcia
peci
power
powerpc powerpc: Enable the DAWR on POWER9 DD2.3 and above 2022-05-22 15:59:53 +10:00
process docs: netdev: add a cheat sheet for the rules 2022-07-04 10:06:50 +01:00
riscv Documentation: riscv: Add sv48 description to VM layout 2022-06-01 20:38:34 -07:00
s390
scheduler
scsi
security integrity-v5.19 2022-05-24 13:50:39 -07:00
sh
sound ASoC: doc: Capitalize RESET line name 2022-07-07 17:16:30 +01:00
sparc
sphinx docs: pdfdocs: Add space for chapter counts >= 100 in TOC 2022-05-17 13:41:26 -06:00
sphinx-static
spi
staging
target
timers
tools Updates to Real Time Linux Analysis tool for 5.19: 2022-05-29 10:48:58 -07:00
trace tracing/timerlat: Print stacktrace in the IRQ handler if needed 2022-05-26 21:13:00 -04:00
translations doc: module: update file references 2022-07-01 14:50:01 -07:00
usb docs: usb: fix literal block marker in usbmon verification example 2022-06-09 09:50:03 -06:00
userspace-api media: uapi: HEVC: Change pic_order_cnt definition in v4l2_hevc_dpb_entry 2022-08-17 15:14:50 +02:00
virt KVM: stats: Fix value for KVM_STATS_UNIT_MAX for boolean stats 2022-07-19 08:54:11 -04:00
vm mm/memory-failure: disable unpoison once hw error happens 2022-06-16 19:11:32 -07:00
w1
watchdog
x86 It was a moderately busy cycle for documentation; highlights include: 2022-05-25 11:17:41 -07:00
xtensa
.gitignore
Changes
CodingStyle
Kconfig
Makefile
SubmittingPatches
arch.rst Documentation: LoongArch: Add basic documentations 2022-06-03 20:09:27 +08:00
asm-annotations.rst
atomic_bitops.txt locking/atomic: Make test_and_*_bit() ordered on failure 2022-08-25 11:45:06 +02:00
atomic_t.txt
conf.py docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0 2022-06-01 09:26:05 -06:00
docutils.conf
dontdiff randstruct: Move seed generation into scripts/basic/ 2022-05-08 01:33:07 -07:00
index.rst docs: Move the HTE documentation to driver-api/ 2022-06-09 10:02:47 -06:00
memory-barriers.txt