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| author | Borislav Petkov <bp@suse.de> | 2016-10-25 11:55:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-10-25 12:28:58 +0200 |
| commit | 7f709d0c322203e37581f6b7c91f88b4fdeca5a0 (patch) | |
| tree | 5fdd673fe3ac42b1a00f38c0e87b99369ab07c1e /arch/x86/kernel/cpu/microcode/core.c | |
| parent | 6b14b81899a2e1e5dd0d089f2a41a6118929658d (diff) | |
| download | linux-stable-7f709d0c322203e37581f6b7c91f88b4fdeca5a0.tar.gz linux-stable-7f709d0c322203e37581f6b7c91f88b4fdeca5a0.tar.bz2 linux-stable-7f709d0c322203e37581f6b7c91f88b4fdeca5a0.zip | |
x86/microcode: Collect CPU info on resume
We need to reread the CPU's microcode revision after resume because
applied microcode gets "forgotten" depending on the sleep state.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20161025095522.11964-9-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/microcode/core.c')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index a18ff7547fa9..f737039d59b2 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -498,6 +498,9 @@ static enum ucode_state microcode_update_cpu(int cpu) { struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + /* Refresh CPU microcode revision after resume. */ + collect_cpu_info(cpu); + if (uci->valid) return microcode_resume_cpu(cpu); |