From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941577AbcJYJzb (ORCPT ); Tue, 25 Oct 2016 05:55:31 -0400 Received: from mail.skyhub.de ([78.46.96.112]:36030 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750845AbcJYJz2 (ORCPT ); Tue, 25 Oct 2016 05:55:28 -0400 From: Borislav Petkov To: X86 ML Cc: LKML Subject: [PATCH 08/12] x86/microcode: Collect CPU info on resume Date: Tue, 25 Oct 2016 11:55:18 +0200 Message-Id: <20161025095522.11964-9-bp@alien8.de> X-Mailer: git-send-email 2.10.0 In-Reply-To: <20161025095522.11964-1-bp@alien8.de> References: <20161025095522.11964-1-bp@alien8.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov 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 --- 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