diff options
| author | Borislav Petkov <[email protected]> | 2016-10-25 11:55:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-10-25 12:28:58 +0200 |
| commit | 7f709d0c322203e37581f6b7c91f88b4fdeca5a0 (patch) | |
| tree | 5fdd673fe3ac42b1a00f38c0e87b99369ab07c1e | |
| parent | 6b14b81899a2e1e5dd0d089f2a41a6118929658d (diff) | |
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 <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -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); |