From mboxrd@z Thu Jan 1 00:00:00 1970 From: dmueller@suse.com (Dirk Mueller) Date: Wed, 25 Jul 2018 10:35:04 +0200 Subject: [PATCH] arm64: Check for errata before evaluating cpu features Message-ID: <20180725083504.25836-1-dmueller@suse.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Since commit d3aec8a28be3b8 ("arm64: capabilities: Restrict KPTI detection to boot-time CPUs") we rely on errata flags being already populated during feature enumeration. The order of errata and features was flipped as part of commit ed478b3f9e4a ("arm64: capabilities: Group handling of features and errata workarounds"). Return to the orginal order of errata and feature evaluation to ensure errata flags are present during feature evaluation. Fixes: d3aec8a28be3b8 ("arm64: capabilities: Restrict KPTI detection to boot-time CPUs") CC: Suzuki K Poulose CC: Marc Zyngier Signed-off-by: Dirk Mueller --- arch/arm64/kernel/cpufeature.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index f24892a40d2c..c6d80743f4ed 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1351,9 +1351,9 @@ static void __update_cpu_capabilities(const struct arm64_cpu_capabilities *caps, static void update_cpu_capabilities(u16 scope_mask) { - __update_cpu_capabilities(arm64_features, scope_mask, "detected:"); __update_cpu_capabilities(arm64_errata, scope_mask, "enabling workaround for"); + __update_cpu_capabilities(arm64_features, scope_mask, "detected:"); } static int __enable_cpu_capability(void *arg) @@ -1408,8 +1408,8 @@ __enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps, static void __init enable_cpu_capabilities(u16 scope_mask) { - __enable_cpu_capabilities(arm64_features, scope_mask); __enable_cpu_capabilities(arm64_errata, scope_mask); + __enable_cpu_capabilities(arm64_features, scope_mask); } /* -- 2.18.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACA28C67790 for ; Wed, 25 Jul 2018 08:35:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5691020844 for ; Wed, 25 Jul 2018 08:35:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5691020844 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728645AbeGYJps (ORCPT ); Wed, 25 Jul 2018 05:45:48 -0400 Received: from mx2.suse.de ([195.135.220.15]:59980 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728540AbeGYJpr (ORCPT ); Wed, 25 Jul 2018 05:45:47 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id D63C6AD9B; Wed, 25 Jul 2018 08:35:08 +0000 (UTC) From: Dirk Mueller To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , Alex Graf , Dave Martin , Dirk Mueller , Suzuki K Poulose , Marc Zyngier Subject: [PATCH] arm64: Check for errata before evaluating cpu features Date: Wed, 25 Jul 2018 10:35:04 +0200 Message-Id: <20180725083504.25836-1-dmueller@suse.com> X-Mailer: git-send-email 2.18.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since commit d3aec8a28be3b8 ("arm64: capabilities: Restrict KPTI detection to boot-time CPUs") we rely on errata flags being already populated during feature enumeration. The order of errata and features was flipped as part of commit ed478b3f9e4a ("arm64: capabilities: Group handling of features and errata workarounds"). Return to the orginal order of errata and feature evaluation to ensure errata flags are present during feature evaluation. Fixes: d3aec8a28be3b8 ("arm64: capabilities: Restrict KPTI detection to boot-time CPUs") CC: Suzuki K Poulose CC: Marc Zyngier Signed-off-by: Dirk Mueller --- arch/arm64/kernel/cpufeature.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index f24892a40d2c..c6d80743f4ed 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1351,9 +1351,9 @@ static void __update_cpu_capabilities(const struct arm64_cpu_capabilities *caps, static void update_cpu_capabilities(u16 scope_mask) { - __update_cpu_capabilities(arm64_features, scope_mask, "detected:"); __update_cpu_capabilities(arm64_errata, scope_mask, "enabling workaround for"); + __update_cpu_capabilities(arm64_features, scope_mask, "detected:"); } static int __enable_cpu_capability(void *arg) @@ -1408,8 +1408,8 @@ __enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps, static void __init enable_cpu_capabilities(u16 scope_mask) { - __enable_cpu_capabilities(arm64_features, scope_mask); __enable_cpu_capabilities(arm64_errata, scope_mask); + __enable_cpu_capabilities(arm64_features, scope_mask); } /* -- 2.18.0