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Mark Rutland 081eb7932c arm64: errata: Expand speculative SSBS workaround once more 
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>
2024-10-01 12:46:55 +01:00
..
arc docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
arm Documentation: Fix spelling mistakes 2024-09-05 14:35:45 -06:00
arm64 arm64: errata: Expand speculative SSBS workaround once more 2024-10-01 12:46:55 +01:00
loongarch Docs/LoongArch: Add advanced extended IRQ model description 2024-09-24 15:32:20 +08:00
m68k Docs: typos/spelling 2024-05-02 10:02:29 -06:00
mips docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
nios2 docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
openrisc docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
parisc docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
powerpc Documentation: Fix spelling mistakes 2024-09-05 14:35:45 -06:00
riscv Another relatively mundane cycle for docs: 2024-09-17 16:44:08 +02:00
s390 s390/vfio-ap: Driver feature advertisement 2024-09-23 17:57:04 +02:00
sh docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
sparc Docs: typos/spelling 2024-05-02 10:02:29 -06:00
x86 ALong with the usual shower of singleton patches, notable patch series in 2024-09-21 07:29:05 -07:00
xtensa docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
index.rst The number of commits for documentation is not huge this time around, but 2023-11-01 17:11:41 -10:00