Commit 7f709d0c authored Oct 25, 2016 by Borislav Petkov Committed by Ingo Molnar Oct 25, 2016

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>

parent 6b14b818

arch/x86/kernel/cpu/microcode/core.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);