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From: Borislav Petkov <bp@alien8.de>
To: X86 ML <x86@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 08/12] x86/microcode: Collect CPU info on resume
Date: Tue, 25 Oct 2016 11:55:18 +0200	[thread overview]
Message-ID: <20161025095522.11964-9-bp@alien8.de> (raw)
In-Reply-To: <20161025095522.11964-1-bp@alien8.de>

From: Borislav Petkov <bp@suse.de>

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>
---
 arch/x86/kernel/cpu/microcode/core.c | 3 +++
 1 file changed, 3 insertions(+)

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);
 
-- 
2.10.0

  parent reply	other threads:[~2016-10-25  9:55 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-25  9:55 [PATCH 00/12] x86/microcode: Rework microcode loading Borislav Petkov
2016-10-25  9:55 ` [PATCH 01/12] x86/microcode: Run the AP-loading routine only on the application processors Borislav Petkov
2016-10-25 16:27   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 02/12] x86/microcode: Move driver authors to CREDITS Borislav Petkov
2016-10-25 16:28   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 03/12] x86/microcode/intel: Simplify generic_load_microcode() Borislav Petkov
2016-10-25 16:28   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 04/12] x86/microcode: Remove one ifdef clause Borislav Petkov
2016-10-25 16:29   ` [tip:x86/microcode] x86/microcode: Remove one #ifdef clause tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 05/12] x86/microcode: Export the microcode cache linked list Borislav Petkov
2016-10-25 16:29   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 06/12] x86/microcode/AMD: Hand down the CPU family Borislav Petkov
2016-10-25 16:30   ` [tip:x86/microcode] x86/microcode/amd: " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 07/12] x86/microcode: Issue the debug printk on resume only on success Borislav Petkov
2016-10-25 16:30   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` Borislav Petkov [this message]
2016-10-25 16:31   ` [tip:x86/microcode] x86/microcode: Collect CPU info on resume tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 09/12] x86/microcode/AMD: Retract functions Borislav Petkov
2016-10-25 16:31   ` [tip:x86/microcode] x86/microcode/amd: Move private inlines to .c and mark local functions static tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 10/12] x86/microcode/intel: Remove intel_lib.c Borislav Petkov
2016-10-25 16:32   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 11/12] x86/microcode: Rework microcode loading Borislav Petkov
2016-10-25 16:32   ` [tip:x86/microcode] " tip-bot for Borislav Petkov
2016-10-25  9:55 ` [PATCH 12/12] x86/microcode: Bump driver version, update copyrights Borislav Petkov
2016-10-25 16:33   ` [tip:x86/microcode] " tip-bot for Borislav Petkov

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