diff options
| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2024-04-10 22:40:46 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-04-11 10:30:33 +0200 |
| commit | cb2db5bb04d7f778fbc1a1ea2507aab436f1bff3 (patch) | |
| tree | c5bb43333f8292d9e7be5e2db8158e33e143be21 /arch/x86/kernel/probe_roms.c | |
| parent | dfe648903f42296866d79f10d03f8c85c9dfba30 (diff) | |
x86/bugs: Cache the value of MSR_IA32_ARCH_CAPABILITIES
There's no need to keep reading MSR_IA32_ARCH_CAPABILITIES over and
over. It's even read in the BHI sysfs function which is a big no-no.
Just read it once and cache it.
Fixes: ec9404e40e8f ("x86/bhi: Add BHI mitigation knob")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/9592a18a814368e75f8f4b9d74d3883aa4fd1eaf.1712813475.git.jpoimboe@kernel.org
Diffstat (limited to 'arch/x86/kernel/probe_roms.c')
0 files changed, 0 insertions, 0 deletions