From patchwork Tue May 17 15:40:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Weijiang X-Patchwork-Id: 12852724 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90EA8C433EF for ; Tue, 17 May 2022 15:42:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350595AbiEQPmp (ORCPT ); Tue, 17 May 2022 11:42:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350476AbiEQPlf (ORCPT ); Tue, 17 May 2022 11:41:35 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA48041312; Tue, 17 May 2022 08:41:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652802094; x=1684338094; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QL+EJrvUjdwjVlpC3RRb0zpcc98SkGdLl0N9KmzbrWQ=; b=WUbsgReLXLdarSSSOjAHUWc04qn1PxXKJCka7nRla9D6f2pe3wmrBdv+ QivzV6y6jEuNRYvyFG2cWCtDTBKXzwe1cIL/8hg4O5uncv6NTcJ4WjcMY wnNlyd339N+mwc6LNJxzofbyZjuSQ8ZPYYqv6jHUC2LjPaMCE5LcW7GBL jPaVmazBYnkrRI4FD8Si/Bz1kjJCRomiUhjlNXW4MsrZ8TxCv2/drypoE 2nALeOQ012+GDOb5KE/jVvVy8OzQs1Y/KoRdVO5DJ4fa7hOYPL/r9aStO cg51Dpqip+FV2bxhD5p2LukLqZxJ5Z3XTf8JqUCLmx8LgiEA9Z679b07B w==; X-IronPort-AV: E=McAfee;i="6400,9594,10350"; a="357632095" X-IronPort-AV: E=Sophos;i="5.91,233,1647327600"; d="scan'208";a="357632095" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 May 2022 08:41:33 -0700 X-IronPort-AV: E=Sophos;i="5.91,233,1647327600"; d="scan'208";a="626533560" Received: from embargo.jf.intel.com ([10.165.9.183]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 May 2022 08:41:32 -0700 From: Yang Weijiang To: pbonzini@redhat.com, jmattson@google.com, seanjc@google.com, like.xu.linux@gmail.com, vkuznets@redhat.com, kan.liang@linux.intel.com, wei.w.wang@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sean Christopherson , Yang Weijiang Subject: [PATCH v12 03/16] KVM: x86: Report XSS as an MSR to be saved if there are supported features Date: Tue, 17 May 2022 11:40:47 -0400 Message-Id: <20220517154100.29983-4-weijiang.yang@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220517154100.29983-1-weijiang.yang@intel.com> References: <20220517154100.29983-1-weijiang.yang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@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. Signed-off-by: Sean Christopherson Signed-off-by: Yang Weijiang --- arch/x86/kvm/x86.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 04812eaaf61b..6dcfedf10734 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1457,6 +1457,7 @@ static const u32 msrs_to_save_all[] = { MSR_F15H_PERF_CTR0, MSR_F15H_PERF_CTR1, MSR_F15H_PERF_CTR2, MSR_F15H_PERF_CTR3, MSR_F15H_PERF_CTR4, MSR_F15H_PERF_CTR5, MSR_IA32_XFD, MSR_IA32_XFD_ERR, + MSR_IA32_XSS, }; static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)]; @@ -6734,6 +6735,10 @@ static void kvm_init_msr_list(void) if (!kvm_cpu_cap_has(X86_FEATURE_XFD)) continue; break; + case MSR_IA32_XSS: + if (!supported_xss) + continue; + break; default: break; }