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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 D4A55C433E0 for ; Wed, 3 Feb 2021 11:23:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C61F64F67 for ; Wed, 3 Feb 2021 11:23:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234173AbhBCLWy (ORCPT ); Wed, 3 Feb 2021 06:22:54 -0500 Received: from mga01.intel.com ([192.55.52.88]:28338 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234141AbhBCLWs (ORCPT ); Wed, 3 Feb 2021 06:22:48 -0500 IronPort-SDR: T+7htSVXndwn1ohFP5D447d8cIPakNw1tmXDr7bT7uyyhYxHObwbTlKJCcj2vhEtJhAnZd7nAu 6jTWBICp0gGw== X-IronPort-AV: E=McAfee;i="6000,8403,9883"; a="199981242" X-IronPort-AV: E=Sophos;i="5.79,398,1602572400"; d="scan'208";a="199981242" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Feb 2021 03:22:08 -0800 IronPort-SDR: Kmuh6o1jdahJ9iaXwcBWw6/DPf6Ajo67xkn8XZu8I+qbUbFfITiIouK4ClYiZhF5mHXMPFSfi3 GauSTKsQDxjw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,398,1602572400"; d="scan'208";a="480311076" Received: from unknown (HELO local-michael-cet-test.sh.intel.com) ([10.239.159.166]) by fmsmga001.fm.intel.com with ESMTP; 03 Feb 2021 03:22:06 -0800 From: Yang Weijiang To: pbonzini@redhat.com, seanjc@google.com, jmattson@google.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: yu.c.zhang@linux.intel.com, Sean Christopherson , Yang Weijiang Subject: [PATCH v15 01/14] KVM: x86: Report XSS as an MSR to be saved if there are supported features Date: Wed, 3 Feb 2021 19:34:08 +0800 Message-Id: <20210203113421.5759-2-weijiang.yang@intel.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20210203113421.5759-1-weijiang.yang@intel.com> References: <20210203113421.5759-1-weijiang.yang@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sean Christopherson Add MSR_IA32_XSS to the list of MSRs reported to userspace if supported_xss is non-zero, i.e. KVM supports at least one XSS based feature. Co-developed-by: Sean Christopherson Signed-off-by: Sean Christopherson Signed-off-by: Yang Weijiang --- arch/x86/kvm/x86.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 76bce832cade..a657706358e8 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1255,6 +1255,8 @@ static const u32 msrs_to_save_all[] = { MSR_ARCH_PERFMON_EVENTSEL0 + 12, MSR_ARCH_PERFMON_EVENTSEL0 + 13, MSR_ARCH_PERFMON_EVENTSEL0 + 14, MSR_ARCH_PERFMON_EVENTSEL0 + 15, MSR_ARCH_PERFMON_EVENTSEL0 + 16, MSR_ARCH_PERFMON_EVENTSEL0 + 17, + + MSR_IA32_XSS, }; static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)]; @@ -5795,6 +5797,10 @@ static void kvm_init_msr_list(void) min(INTEL_PMC_MAX_GENERIC, x86_pmu.num_counters_gp)) continue; break; + case MSR_IA32_XSS: + if (!supported_xss) + continue; + break; default: break; } -- 2.26.2