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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C9714C76186 for ; Mon, 29 Jul 2019 19:54:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 948A321655 for ; Mon, 29 Jul 2019 19:54:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564430070; bh=X18Vc15Nh0Gjp2oGGzefjyJtWpx+PSRKX+ddbBSp7Bg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dxsp4BVqxD4CCDmXezFWKzgP9Tto4PtZBgCGeFlIM471nqFFpx7t8hYoUD6K02X+o 7SYCTqkSe1j42kGihkBGPSVuCBZoRJ6X5dlhZAm4l4PeGwmfDf/Za33JkXrpS3QXo1 L+k2aULyc2nWMY/Y4mxxOPVUMr4NNvk1mkWUZANk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404052AbfG2Ty3 (ORCPT ); Mon, 29 Jul 2019 15:54:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:46908 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403892AbfG2TyR (ORCPT ); Mon, 29 Jul 2019 15:54:17 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 20F0A2054F; Mon, 29 Jul 2019 19:54:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564430056; bh=X18Vc15Nh0Gjp2oGGzefjyJtWpx+PSRKX+ddbBSp7Bg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QdMPKt+sa7bdO7nrZ3/WrtYR9nzMSQ0OVFEOtEeKwwcR04LI4ShFTT/KpQE8nmVj/ G6UEGsOzhK/4YFQ92vqkA85bLLw6cKZznnahLzWjTLrZfcQ4SmcdHo2dIhcDFxhih7 7knGEQL6Ft4LQvoth2ogdqQ2yxnRIcTp+C8cdAoM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhenzhong Duan , Thomas Gleixner Subject: [PATCH 5.2 182/215] x86/speculation/mds: Apply more accurate check on hypervisor platform Date: Mon, 29 Jul 2019 21:22:58 +0200 Message-Id: <20190729190811.703371775@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190739.971253303@linuxfoundation.org> References: <20190729190739.971253303@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zhenzhong Duan commit 517c3ba00916383af6411aec99442c307c23f684 upstream. X86_HYPER_NATIVE isn't accurate for checking if running on native platform, e.g. CONFIG_HYPERVISOR_GUEST isn't set or "nopv" is enabled. Checking the CPU feature bit X86_FEATURE_HYPERVISOR to determine if it's running on native platform is more accurate. This still doesn't cover the platforms on which X86_FEATURE_HYPERVISOR is unsupported, e.g. VMware, but there is nothing which can be done about this scenario. Fixes: 8a4b06d391b0 ("x86/speculation/mds: Add sysfs reporting for MDS") Signed-off-by: Zhenzhong Duan Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/1564022349-17338-1-git-send-email-zhenzhong.duan@oracle.com Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/cpu/bugs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -1226,7 +1226,7 @@ static ssize_t l1tf_show_state(char *buf static ssize_t mds_show_state(char *buf) { - if (!hypervisor_is_type(X86_HYPER_NATIVE)) { + if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) { return sprintf(buf, "%s; SMT Host state unknown\n", mds_strings[mds_mitigation]); }