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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BF67AC28CF5 for ; Wed, 26 Jan 2022 03:47:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237300AbiAZDrz (ORCPT ); Tue, 25 Jan 2022 22:47:55 -0500 Received: from mga14.intel.com ([192.55.52.115]:26333 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233406AbiAZDrx (ORCPT ); Tue, 25 Jan 2022 22:47:53 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643168873; x=1674704873; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=YJvfPZ+Ryyuw8LzQBKnmgNZUzpx/Ro+K1QSwSjRhuHo=; b=Py5+8wwPQf4TBj3Hd4huH2pdYhP7Bcu8P19nCho4+8zkF3Emq8YCV4eq hfpVpJr9V/2tUzkkNJtrJCj3PY/YYZNjpNJ0RCTMCji6n74ayWDkLhd7U cg4mYTHhieu1ARE0U/jNXOaVAyiN2qSbE8bDP9mLRDkeN8p539FORSDds fAVYprfbMY+F25Yxff9jwjE5N7IJYfXPlcE8IkJwPYCagndh8v19yfu5P M2KAPzjAQeVSnKJeos8xxCc07onQg59JxASZmu5ME79xXw365NauX2SZz Bc2G9EgGP6KdSRr1jGaksfae9bgbQnbIM7aBY1Pxjvd24n85o0PN9gjov g==; X-IronPort-AV: E=McAfee;i="6200,9189,10238"; a="246693222" X-IronPort-AV: E=Sophos;i="5.88,316,1635231600"; d="scan'208";a="246693222" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jan 2022 19:47:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,316,1635231600"; d="scan'208";a="520653248" Received: from lxy-dell.sh.intel.com ([10.239.159.55]) by orsmga007.jf.intel.com with ESMTP; 25 Jan 2022 19:47:51 -0800 From: Xiaoyao Li To: Paolo Bonzini , Sean Christopherson , Wanpeng Li , Vitaly Kuznetsov , Jim Mattson Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, xiaoyao.li@intel.com Subject: [PATCH] KVM: x86: Keep MSR_IA32_XSS unchanged for INIT Date: Wed, 26 Jan 2022 11:47:50 +0800 Message-Id: <20220126034750.2495371-1-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It has been corrected from SDM version 075 that MSR_IA32_XSS is reset to zero on Power up and Reset but keeps unchanged on INIT. Fixes: a554d207dc46 ("KVM: X86: Processor States following Reset or INIT") Signed-off-by: Xiaoyao Li --- arch/x86/kvm/x86.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 55518b7d3b96..c0727939684e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11257,6 +11257,7 @@ void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) vcpu->arch.msr_misc_features_enables = 0; vcpu->arch.xcr0 = XFEATURE_MASK_FP; + vcpu->arch.ia32_xss = 0; } /* All GPRs except RDX (handled below) are zeroed on RESET/INIT. */ @@ -11273,8 +11274,6 @@ void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) cpuid_0x1 = kvm_find_cpuid_entry(vcpu, 1, 0); kvm_rdx_write(vcpu, cpuid_0x1 ? cpuid_0x1->eax : 0x600); - vcpu->arch.ia32_xss = 0; - static_call(kvm_x86_vcpu_reset)(vcpu, init_event); kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); -- 2.27.0