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Kim Phillips 00f511d716 x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled 
commit fd470a8bee upstream.

Unlike Intel's Enhanced IBRS feature, AMD's Automatic IBRS does not
provide protection to processes running at CPL3/user mode, see section
"Extended Feature Enable Register (EFER)" in the APM v2 at
https://bugzilla.kernel.org/attachment.cgi?id=304652

Explicitly enable STIBP to protect against cross-thread CPL3
branch target injections on systems with Automatic IBRS enabled.

Also update the relevant documentation.

Fixes: e7862eda30 ("x86/cpu: Support AMD Automatic IBRS")
Reported-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230720194727.67022-1-kim.phillips@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-04-03 15:19:54 +02:00
..
ABI x86/rfds: Mitigate Register File Data Sampling (RFDS) 2024-03-15 10:48:21 -04:00
accounting sched/psi: Allow unprivileged polling of N*2s period 2023-07-27 08:50:38 +02:00
admin-guide x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled 2024-04-03 15:19:54 +02:00
arc docs: ARC: Improve readability 2021-12-10 14:28:01 -07:00
arm EFI updates for v6.1 2022-10-09 08:56:54 -07:00
arm64 arm64: Subscribe Microsoft Azure Cobalt 100 to ARM Neoverse N2 errata 2024-02-23 09:12:52 +01:00
block blk-crypto: don't use struct request_queue for public interfaces 2023-05-11 23:03:00 +09:00
bpf bpf, docs: Fix modulo zero, division by zero, overflow, and underflow 2023-03-10 09:33:50 +01:00
cdrom It was a moderately busy cycle for documentation; highlights include: 2022-05-25 11:17:41 -07:00
core-api overflow: Fix kern-doc markup for functions 2022-10-25 14:57:42 -07:00
cpu-freq cpufreq: Reintroduce ready() callback 2022-02-09 13:18:49 +05:30
crypto crypto: engine - Add KPP Support to Crypto Engine 2021-10-29 21:04:03 +08:00
dev-tools docs/scripts/gdb: add necessary make scripts_gdb step 2023-03-10 09:33:58 +01:00
devicetree wifi: mwifiex: Support SD8978 chipset 2024-02-23 09:12:48 +01:00
doc-guide Rust introduction for v6.1-rc1 2022-10-03 16:39:37 -07:00
driver-api PCI/P2PDMA: Remove reference to pci_p2pdma_map_sg() 2024-01-25 15:27:44 -08:00
fault-injection lkdtm: replace ll_rw_block with submit_bh 2023-07-19 16:21:53 +02:00
fb Documentation: fb: udlfb: clean up text and formatting 2022-09-27 13:21:44 -06:00
features Xtensa updates for v5.20 2022-08-04 15:35:58 -07:00
filesystems rename(): fix the locking of subdirectories 2024-01-31 16:17:02 -08:00
firmware-guide Merge branches 'acpi-misc', 'acpi-tools' and 'acpi-docs' 2022-10-03 20:03:49 +02:00
firmware_class firmware: revamp firmware documentation 2017-01-11 09:42:59 +01:00
fpga Documentation: fpga: dfl: add link address of feature id table 2022-05-10 16:05:27 +08:00
gpu drm/vmwgfx: Remove vmwgfx_hashtab 2023-01-18 11:58:28 +01:00
hid Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
hwmon hwmon: (ftsteutates) Fix scaling of measurements 2023-03-10 09:33:10 +01:00
i2c docs: i2c: slave-interface: return errno when handle I2C_SLAVE_WRITE_REQUESTED 2022-09-28 21:41:59 +02:00
ia64 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
iio docs: iio: add documentation for BNO055 driver 2022-09-21 18:42:56 +01:00
images docs: add SVG version of the Linux logo 2022-06-01 09:32:45 -06:00
infiniband RDMA/core: Remove FMR device ops 2020-06-02 20:32:54 -03:00
input Merge branch 'next' into for-linus 2022-10-09 22:30:23 -07:00
isdn isdn: capi: dead code removal 2019-12-11 09:12:38 +01:00
kbuild Documentation: kbuild: Add description of git for reproducible builds 2022-10-28 00:16:29 +09:00
kernel-hacking Documentation: Fix spelling mistake in hacking.rst 2022-10-24 11:27:51 -06:00
leds leds: qcom-lpg: Require pattern to follow documentation 2022-05-24 22:08:10 +02:00
litmus-tests Documentation/litmus-tests: Add note on herd7 7.56 in atomic litmus test 2020-06-29 12:05:18 -07:00
livepatch doc: module: update file references 2022-07-01 14:50:01 -07:00
locking Remove duplicate words inside documentation 2022-09-27 13:21:43 -06:00
loongarch docs/LoongArch: Add booting description 2022-12-08 14:59:15 +08:00
m68k video: fbdev: atari: Fix inverse handling 2022-07-18 07:56:17 +02:00
maintainer Some late-arriving documentation improvements. This is mostly build-system 2022-03-31 12:10:42 -07:00
mhi docs: Add documentation for MHI bus 2020-03-19 07:41:04 +01:00
mips docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
misc-devices Documentation: Wire Oxford Semiconductor PCIe (Tornado) 950 2022-05-19 18:24:22 +02:00
mm mm: multi-gen LRU: rename lrugen->lists[] to lrugen->folios[] 2023-09-19 12:27:54 +02:00
netlabel docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
networking tcp: enforce receive buffer memory limits by allowing the tcp window to shrink 2023-10-19 23:08:54 +02:00
nios2 docs: nios2: add missing ReST file 2020-12-07 08:35:21 -07:00
nvdimm nvdimm: fixes to maintainter-entry-profile 2020-05-25 10:19:19 -06:00
openrisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
parisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
PCI Fix of heap data and clang warnings, support for a new Intel NTB device, 2022-08-13 14:00:45 -07:00
pcmcia docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
peci docs: Add PECI documentation 2022-02-09 08:04:44 +01:00
power Merge branches 'pm-devfreq', 'pm-qos', 'pm-tools' and 'pm-docs' 2022-07-29 19:46:00 +02:00
powerpc powerpc/64s: update cpu selection options 2022-09-28 19:22:10 +10:00
process docs: Set minimal gtags / GNU GLOBAL version to 6.6.5 2023-07-05 18:27:38 +01:00
RCU There's not a huge amount of activity in the docs tree this time around, 2022-10-03 10:23:32 -07:00
riscv riscv: Move early dtb mapping into the fixmap region 2023-05-01 08:26:28 +09:00
rust x86: enable initial Rust support 2022-09-28 09:02:45 +02:00
s390 vfio/mdev: embedd struct mdev_parent in the parent data structure 2022-10-04 12:06:58 -06:00
scheduler docs: scheduler: Update new path for the sysctl knobs 2022-09-27 13:21:42 -06:00
scsi scsi: core: Fix the scsi_set_resid() documentation 2023-09-13 09:43:00 +02:00
security KEYS: encrypted: fix key instantiation with user-provided data 2022-12-21 17:48:11 +01:00
sh docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sound ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument 2024-02-05 20:12:54 +00:00
sparc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sphinx docs: kernel_abi.py: fix command injection 2024-01-31 16:17:00 -08:00
sphinx-static docs: add support for RTD dark mode 2021-12-10 14:05:55 -07:00
spi spi: pxa2xx_spi: Convert to use GPIO descriptors 2022-01-31 15:17:27 +00:00
staging docs: put atomic*.txt and memory-barriers.txt into the core-api book 2022-09-29 12:55:06 -06:00
target tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
timers rcu: Remove the RCU_FAST_NO_HZ Kconfig option 2021-11-30 17:24:47 -08:00
tools A handful of relatively simple documentation fixes, plus a set of patches 2022-10-13 10:58:32 -07:00
trace tracing/probes: Add symstr type for dynamic events 2023-08-03 10:23:54 +02:00
translations docs/zh_CN: Add LoongArch booting description's translation 2022-12-08 15:03:14 +08:00
usb usbip: add USBIP_URB_* URB transfer flags 2022-08-31 09:07:53 +02:00
userspace-api media: mc: Expand MUST_CONNECT flag to always require an enabled link 2024-04-03 15:19:25 +02:00
virt x86/sev: Change snp_guest_issue_request()'s fw_err argument 2023-11-20 11:52:13 +01:00
w1 Documentation: W1: minor typo corrections 2022-09-27 13:21:44 -06:00
watchdog watchdog/pseries-wdt: initial support for H_WATCHDOG-based watchdog timers 2022-07-20 21:57:39 +10:00
x86 x86/Kconfig: Remove CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT 2024-04-03 15:19:47 +02:00
xtensa A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
arch.rst Documentation: LoongArch: Add basic documentations 2022-06-03 20:09:27 +08:00
atomic_bitops.txt wait_on_bit: add an acquire memory barrier 2022-08-26 09:30:25 -07:00
atomic_t.txt Documentation/atomic_t: Document forward progress expectations 2021-08-04 15:16:47 +02:00
Changes docs: add back 'Documentation/Changes' file (as symlink) 2016-12-14 16:30:12 -08:00
CodingStyle doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
conf.py There's not a huge amount of activity in the docs tree this time around, 2022-10-03 10:23:32 -07:00
docutils.conf doc-rst: Add missing newline at end of file 2019-06-20 14:16:56 -06:00
dontdiff randstruct: Move seed generation into scripts/basic/ 2022-05-08 01:33:07 -07:00
index.rst Rust introduction for v6.1-rc1 2022-10-03 16:39:37 -07:00
Kconfig docs: Kconfig: Fix help text indentation 2022-06-13 11:33:43 -06:00
Makefile docs: Makefile: Add -no-shell-escape option to LATEXOPTS 2022-02-14 12:50:17 -07:00
memory-barriers.txt docs/memory-barriers.txt: Fixup long lines 2022-08-31 05:15:31 -07:00
SubmittingPatches doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
subsystem-apis.rst docs: Rewrite the front page 2022-09-29 12:55:06 -06:00