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Mark Rutland 9707c7895c arm64: errata: Expand speculative SSBS workaround once more 
[ Upstream commit 081eb7932c ]

A number of Arm Ltd CPUs suffer from errata whereby an MSR to the SSBS
special-purpose register does not affect subsequent speculative
instructions, permitting speculative store bypassing for a window of
time.

We worked around this for a number of CPUs in commits:

* 7187bb7d0b ("arm64: errata: Add workaround for Arm errata 3194386 and 3312417")
* 75b3c43eab ("arm64: errata: Expand speculative SSBS workaround")
* 145502cac7ea70b5 ("arm64: errata: Expand speculative SSBS workaround (again)")

Since then, a (hopefully final) batch of updates have been published,
with two more affected CPUs. For the affected CPUs the existing
mitigation is sufficient, as described in their respective Software
Developer Errata Notice (SDEN) documents:

* Cortex-A715 (MP148) SDEN v15.0, erratum 3456084
  https://developer.arm.com/documentation/SDEN-2148827/1500/

* Neoverse-N3 (MP195) SDEN v5.0, erratum 3456111
  https://developer.arm.com/documentation/SDEN-3050973/0500/

Enable the existing mitigation by adding the relevant MIDRs to
erratum_spec_ssbs_list, and update silicon-errata.rst and the
Kconfig text accordingly.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20240930111705.3352047-3-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[ Mark: fix conflict in silicon-errata.rst, handle move ]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-10-17 15:11:45 +02:00
..
ABI f2fs: introduce F2FS_IPU_HONOR_OPU_WRITE ipu policy 2024-10-17 15:11:05 +02:00
accounting sched/psi: report zeroes for CPU full at the system level 2022-06-09 10:22:48 +02:00
admin-guide proc: add config & param to block forcing mem writes 2024-10-17 15:11:27 +02:00
arm Documentation: arm: marvell: Add 88F6825 model into list 2021-08-24 13:26:32 -06:00
arm64 arm64: errata: Expand speculative SSBS workaround once more 2024-10-17 15:11:45 +02:00
block Documentation: block: blk-mq: Fix small typo in multi-queue docs 2021-08-24 13:30:00 -06:00
bpf libbpf: Rename libbpf documentation index file 2021-08-18 08:45:25 -07:00
cdrom docs: cdrom-standard.rst: get rid of uneeded UTF-8 chars 2021-05-11 11:00:17 -06:00
core-api dma-mapping: add dma_opt_mapping_size() 2024-04-10 16:18:47 +02:00
cpu-freq cpufreq: Remove ready() callback 2021-09-02 18:04:17 +02:00
crypto crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
dev-tools docs/scripts/gdb: add necessary make scripts_gdb step 2023-03-10 09:39:53 +01:00
devicetree dt-bindings: thermal: correct thermal zone node name limit 2024-08-19 05:45:10 +02:00
doc-guide docs: doc-guide: avoid using ReST :doc:foo markup 2021-06-17 13:24:37 -06:00
driver-api ipmi: docs: don't advertise deprecated sysfs entries 2024-10-17 15:10:54 +02:00
fault-injection debugfs: fix error when writing negative value to atomic_t debugfs file 2022-12-31 13:14:03 +01:00
fb Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
features RISC-V Patches for the 5.15 Merge Window, Part 2 2021-09-11 14:29:42 -07:00
filesystems Revert "lockd: introduce safe async lock op" 2024-04-27 17:05:23 +02:00
firmware-guide Documentation: ACPI: EINJ: Fix obsolete example 2022-08-25 11:40:01 +02:00
firmware_class firmware: revamp firmware documentation 2017-01-11 09:42:59 +01:00
fpga fpga: fix spelling mistakes 2021-07-21 19:54:21 -07:00
gpu drm/i915/display: Move DRRS code its own file 2022-03-08 19:12:40 +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 09:39:21 +01:00
i2c Documentation: i2c: add i2c-sysfs into index 2021-08-10 22:58:32 +02:00
ia64 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
ide docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
iio iio: hrtimer: Allow sub Hz granularity 2021-03-25 19:13:49 +00:00
infiniband RDMA/core: Remove FMR device ops 2020-06-02 20:32:54 -03:00
input Input: iforce - add support for Boeder Force Feedback Wheel 2022-09-20 12:39:45 +02:00
isdn isdn: capi: dead code removal 2019-12-11 09:12:38 +01:00
kbuild Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
kernel-hacking docs: futex: Fix kernel-doc references after code split-up preparation 2023-04-26 13:51:53 +02:00
leds Documentation: leds: standartizing LED names 2021-08-20 10:26:24 +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 docs: livepatch: Fix a typo and remove the unnecessary gaps in a sentence 2021-03-08 17:25:16 -07:00
locking hwspinlock: Introduce hwspin_lock_bust() 2024-09-12 11:07:41 +02:00
m68k docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
maintainer media: add a subsystem profile documentation 2021-03-22 08:56:42 +01:00
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 dw-xdata-pcie: Update outdated info and improve text format 2021-04-14 19:47:28 +02:00
netlabel docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
networking net: ena: Add dynamic recycling mechanism for rx buffers 2024-06-16 13:39:52 +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 pci-v5.15-changes 2021-09-07 19:13:42 -07:00
pcmcia docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
power Documentation: power: include kernel-doc in Energy Model doc 2021-09-07 21:17:28 +02:00
powerpc powerpc/doc: Fix htmldocs errors 2021-08-27 00:56:34 +10:00
process docs/process/howto: Replace C89 with C11 2023-12-13 18:36:46 +01:00
RCU doc: Update stallwarn.rst with recent changes 2021-07-20 13:36:33 -07:00
riscv riscv: Move early dtb mapping into the fixmap region 2023-05-01 08:23:24 +09:00
s390 vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE 2021-06-21 15:29:25 -06:00
scheduler This was a reasonably active cycle for documentation; this pull includes: 2021-06-28 16:53:05 -07:00
scsi scsi: core: Fix the scsi_set_resid() documentation 2023-09-19 12:22:50 +02:00
security KEYS: trusted: allow use of kernel RNG for key material 2023-10-19 23:05:33 +02:00
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 2024-02-23 08:54:46 +01:00
sparc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sphinx docs: kernel_include.py: Cope with docutils 0.21 2024-05-25 16:20:19 +02:00
sphinx-static doc-rst: Reduce CSS padding around Field 2019-10-02 10:03:06 -06:00
spi spi: pxa2xx: Update documentation to point out that it's outdated 2021-05-18 14:05:36 +01:00
staging remoteproc updates for v5.9 2020-08-11 11:17:45 -07:00
target tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
timers Documentation: drop optional BOMs 2021-05-10 15:17:34 -06:00
trace tracing/probes: Add symstr type for dynamic events 2023-08-03 10:22:30 +02:00
translations docs/process/howto: Replace C89 with C11 2023-12-13 18:36:46 +01:00
tty/device_drivers serial: 8250: Add proper clock handling for OxSemi PCIe devices 2022-08-17 14:24:23 +02:00
usb docs: usb: fix malformed table 2021-08-05 12:31:51 +02:00
userspace-api Remove DECnet support from kernel 2023-06-21 15:59:15 +02:00
virt KVM: s390: disable migration mode when dirty tracking is disabled 2023-03-10 09:40:01 +01:00
vm Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
w1 w1: fix build warning in w1_ds2438.rst 2021-05-26 09:11:24 +02:00
watchdog docs: watchdog: fix obsolete include file reference in pcwd 2021-03-06 17:36:51 -07:00
x86 x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key 2024-04-10 16:18:48 +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 docs: Group arch-specific documentation under "CPU Architectures" 2021-03-15 13:35:35 -06:00
asm-annotations.rst x86/entry: Emit a symbol for register restoring thunk 2021-01-14 17:18:25 +01:00
atomic_bitops.txt locking/atomic: Make test_and_*_bit() ordered on failure 2022-08-25 11:39:54 +02:00
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 docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0 2022-06-09 10:23:30 +02:00
COPYING-logo Replace HTTP links with HTTPS ones: documentation 2020-06-08 09:30:19 -06:00
docutils.conf doc-rst: Add missing newline at end of file 2019-06-20 14:16:56 -06:00
dontdiff kbuild: generate Module.symvers only when vmlinux exists 2021-04-25 05:17:02 +09:00
index.rst docs: Group arch-specific documentation under "CPU Architectures" 2021-03-15 13:35:35 -06:00
Kconfig docs: Kconfig/Makefile: add a check for broken ABI files 2020-10-30 13:08:07 +01:00
logo.gif Revert "linux.conf.au 2009: Tuz" 2009-04-27 12:00:27 -07:00
Makefile docs: Makefile: Use CONFIG_SHELL not SHELL 2021-06-18 11:26:08 -06:00
memory-barriers.txt docs/memory-barriers.txt: Fix a typo in CPU MEMORY BARRIERS section 2020-11-06 17:24:51 -08:00
SubmittingPatches doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
watch_queue.rst docs: watch_queue: fix some warnings 2020-09-10 10:48:56 -06:00