android_kernel_motorola_sm6375/arch
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Dave Hansen ac78921ec2 x86/speculation: Mark all Skylake CPUs as vulnerable to GDS
[ Upstream commit c9f4c45c8ec3f07f4f083f9750032a1ec3eab6b2 ]

The Gather Data Sampling (GDS) vulnerability is common to all Skylake
processors.  However, the "client" Skylakes* are now in this list:

	https://www.intel.com/content/www/us/en/support/articles/000022396/processors.html

which means they are no longer included for new vulnerabilities here:

	https://www.intel.com/content/www/us/en/developer/topic-technology/software-security-guidance/processors-affected-consolidated-product-cpu-model.html

or in other GDS documentation.  Thus, they were not included in the
original GDS mitigation patches.

Mark SKYLAKE and SKYLAKE_L as vulnerable to GDS to match all the
other Skylake CPUs (which include Kaby Lake).  Also group the CPUs
so that the ones that share the exact same vulnerabilities are next
to each other.

Last, move SRBDS to the end of each line.  This makes it clear at a
glance that SKYLAKE_X is unique.  Of the five Skylakes, it is the
only "server" CPU and has a different implementation from the
clients of the "special register" hardware, making it immune to SRBDS.

This makes the diff much harder to read, but the resulting table is
worth it.

I very much appreciate the report from Michael Zhivich about this
issue.  Despite what level of support a hardware vendor is providing,
the kernel very much needs an accurate and up-to-date list of
vulnerable CPUs.  More reports like this are very welcome.

* Client Skylakes are CPUID 406E3/506E3 which is family 6, models
  0x4E and 0x5E, aka INTEL_FAM6_SKYLAKE and INTEL_FAM6_SKYLAKE_L.

Reported-by: Michael Zhivich <mzhivich@akamai.com>
Fixes: 8974eb588283 ("x86/speculation: Add Gather Data Sampling mitigation")
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-09-23 10:59:52 +02:00
..
alpha
arc
arm ARM: dts: BCM53573: Fix Ethernet info for Luxul devices 2023-09-23 10:59:45 +02:00
arm64 arm64: dts: qcom: sdm845: Add missing RPMh power domain to GCC 2023-09-23 10:59:45 +02:00
c6x
csky
h8300
hexagon
ia64
m68k m68k: Fix invalid .section syntax 2023-09-23 10:59:38 +02:00
microblaze
mips mmc: au1xmmc: force non-modular build and remove symbol_get usage 2023-09-23 10:59:36 +02:00
nds32
nios2
openrisc
parisc
powerpc powerpc/iommu: Fix notifiers being shared by PCI and VIO buses 2023-09-23 10:59:48 +02:00
riscv
s390
sh
sparc
um
unicore32
x86 x86/speculation: Mark all Skylake CPUs as vulnerable to GDS 2023-09-23 10:59:52 +02:00
xtensa
.gitignore
Kconfig