From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964894AbeBPL0x (ORCPT ); Fri, 16 Feb 2018 06:26:53 -0500 Received: from mail.skyhub.de ([5.9.137.197]:50314 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964872AbeBPL0w (ORCPT ); Fri, 16 Feb 2018 06:26:52 -0500 From: Borislav Petkov To: Ashok Raj Cc: X86 ML , LKML Subject: [PATCH 0/3] x86/microcode: Add a microcode loader callback Date: Fri, 16 Feb 2018 12:26:37 +0100 Message-Id: <20180216112640.11554-1-bp@alien8.de> X-Mailer: git-send-email 2.13.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov Add a callback which the microcode loader calls after microcode has been upgraded late to let the user know that any CPUID changes potentially won't take effect. One possible example for this is that late loading happens after alternatives have run and thus patching which relies on those new CPUID features won't happen. @Ashok: I haven't added your tags yet because I did a small change to run the callback only when no error has been encountered during loading. Please run them on your setup to confirm everything's still fine. Thanks. Borislav Petkov (3): x86/microcode: Propagate return value from updating functions x86/CPU: Add a microcode loader callback x86/CPU: Check CPU feature bits after microcode upgrade arch/x86/include/asm/microcode.h | 9 ++++++-- arch/x86/include/asm/processor.h | 1 + arch/x86/kernel/cpu/common.c | 30 +++++++++++++++++++++++++++ arch/x86/kernel/cpu/microcode/amd.c | 10 ++++----- arch/x86/kernel/cpu/microcode/core.c | 39 ++++++++++++++++++++--------------- arch/x86/kernel/cpu/microcode/intel.c | 10 ++++----- 6 files changed, 70 insertions(+), 29 deletions(-) -- 2.13.0