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| author | Kan Liang <kan.liang@linux.intel.com> | 2019-02-04 14:23:29 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-02-11 07:59:23 +0100 |
| commit | 0f42b790c9ba5ec2f25b7da8b0b6d361082d67b0 (patch) | |
| tree | 8e4ac678e108e774930756ac4e477389eb66b129 /arch/x86/include/asm/setup.h | |
| parent | 0237199186e7a4aa5310741f0a6498a20c820fd7 (diff) | |
| download | linux-0-day-0f42b790c9ba5ec2f25b7da8b0b6d361082d67b0.tar.gz linux-0-day-0f42b790c9ba5ec2f25b7da8b0b6d361082d67b0.tar.xz | |
x86/cpufeature: Add facility to check for min microcode revisions
For bug workarounds or checks, it is useful to check for specific
microcode revisions.
Add a new generic function to match the CPU with stepping.
Add the other function to check the min microcode revisions for
the matched CPU.
A new table format is introduced to facilitate the quirk to
fill the related information.
This does not change the existing x86_cpu_id because it's an ABI
shared with modules, and also has quite different requirements,
as in no wildcards, but everything has to be matched exactly.
Originally-by: Andi Kleen <ak@linux.intel.com>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: eranian@google.com
Link: https://lkml.kernel.org/r/1549319013-4522-1-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/setup.h')
0 files changed, 0 insertions, 0 deletions