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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 95A36C3F2D1 for ; Mon, 2 Mar 2020 23:57:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BADF217F4 for ; Mon, 2 Mar 2020 23:57:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727686AbgCBX5u (ORCPT ); Mon, 2 Mar 2020 18:57:50 -0500 Received: from mga02.intel.com ([134.134.136.20]:25519 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727498AbgCBX5a (ORCPT ); Mon, 2 Mar 2020 18:57:30 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Mar 2020 15:57:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,509,1574150400"; d="scan'208";a="243384734" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.202]) by orsmga006.jf.intel.com with ESMTP; 02 Mar 2020 15:57:23 -0800 From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xiaoyao Li Subject: [PATCH v2 37/66] KVM: x86: Refactor handling of XSAVES CPUID adjustment Date: Mon, 2 Mar 2020 15:56:40 -0800 Message-Id: <20200302235709.27467-38-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200302235709.27467-1-sean.j.christopherson@intel.com> References: <20200302235709.27467-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Invert the handling of XSAVES, i.e. set it based on boot_cpu_has() by default, in preparation for adding KVM cpu caps, which will generate the mask at load time before ->xsaves_supported() is ready. No functional change intended. Reviewed-by: Vitaly Kuznetsov Signed-off-by: Sean Christopherson --- arch/x86/kvm/cpuid.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index aacfd6af774a..c2e70cd0dbf1 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -422,7 +422,6 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) unsigned f_gbpages = 0; unsigned f_lm = 0; #endif - unsigned f_xsaves = kvm_x86_ops->xsaves_supported() ? F(XSAVES) : 0; unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0; /* cpuid 1.edx */ @@ -479,7 +478,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) /* cpuid 0xD.1.eax */ const u32 kvm_cpuid_D_1_eax_x86_features = - F(XSAVEOPT) | F(XSAVEC) | F(XGETBV1) | f_xsaves; + F(XSAVEOPT) | F(XSAVEC) | F(XGETBV1) | F(XSAVES); /* all calls to cpuid_count() should be made on the same cpu */ get_cpu(); @@ -610,6 +609,10 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) entry->eax &= kvm_cpuid_D_1_eax_x86_features; cpuid_entry_mask(entry, CPUID_D_1_EAX); + + if (!kvm_x86_ops->xsaves_supported()) + cpuid_entry_clear(entry, X86_FEATURE_XSAVES); + if (entry->eax & (F(XSAVES)|F(XSAVEC))) entry->ebx = xstate_required_size(supported_xcr0, true); else -- 2.24.1