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=-14.8 required=3.0 tests=BAYES_00, DATE_IN_FUTURE_06_12,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 4683DC43381 for ; Sun, 7 Feb 2021 06:56:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C68C64D79 for ; Sun, 7 Feb 2021 06:56:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229651AbhBGG4f (ORCPT ); Sun, 7 Feb 2021 01:56:35 -0500 Received: from mga07.intel.com ([134.134.136.100]:48431 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229611AbhBGG4d (ORCPT ); Sun, 7 Feb 2021 01:56:33 -0500 IronPort-SDR: 3GTvJJnbRjzp4nUoXOTww258BFH+aZoQgA97PqCiZajHDHzReqZsijm9zl/ObGlEV1NouFVKCj ql7diPm3UH5g== X-IronPort-AV: E=McAfee;i="6000,8403,9887"; a="245660843" X-IronPort-AV: E=Sophos;i="5.81,159,1610438400"; d="scan'208";a="245660843" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2021 22:54:45 -0800 IronPort-SDR: bZjtW2cyg+iTRXU9kcYbw194kx7IhBTOrbnlSPqgzGgDPId9vZLjXGEEmx4zyOK1aMt90Mn+TD qYpI1/P4LIOw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,159,1610438400"; d="scan'208";a="410376574" Received: from vmmteam.bj.intel.com ([10.240.193.86]) by fmsmga004.fm.intel.com with ESMTP; 06 Feb 2021 22:54:43 -0800 From: Jing Liu To: pbonzini@redhat.com, seanjc@google.com, kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, jing2.liu@intel.com Subject: [PATCH RFC 1/7] kvm: x86: Expose XFD CPUID to guest Date: Sun, 7 Feb 2021 10:42:50 -0500 Message-Id: <20210207154256.52850-2-jing2.liu@linux.intel.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20210207154256.52850-1-jing2.liu@linux.intel.com> References: <20210207154256.52850-1-jing2.liu@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Intel's Extended Feature Disable (XFD) feature is an extension to the XSAVE feature that allows an operating system to enable a feature while preventing specific user threads from using the feature. A processor that supports XFD enumerates CPUID.(EAX=0DH,ECX=1):EAX[4] as 1. Signed-off-by: Jing Liu --- arch/x86/kvm/cpuid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 83637a2ff605..04a73c395c71 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -437,7 +437,7 @@ void kvm_set_cpu_caps(void) ); kvm_cpu_cap_mask(CPUID_D_1_EAX, - F(XSAVEOPT) | F(XSAVEC) | F(XGETBV1) | F(XSAVES) + F(XSAVEOPT) | F(XSAVEC) | F(XGETBV1) | F(XSAVES) | F(XFD) ); kvm_cpu_cap_mask(CPUID_8000_0001_ECX, -- 2.18.4