From nobody Sun Apr 12 02:46:53 2026 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 9E3F8C19F29 for ; Tue, 2 Aug 2022 16:12:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237939AbiHBQM0 (ORCPT ); Tue, 2 Aug 2022 12:12:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237900AbiHBQL5 (ORCPT ); Tue, 2 Aug 2022 12:11:57 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E30F621256 for ; Tue, 2 Aug 2022 09:10:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1659456564; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KJkQAcM9VNVxKQe+j6CNdtSCVSmALxztnywuXzDlWw4=; b=V3IAfvbsEgChbdQ52I+nLFOBcUegEiBZ/9zhdts1YsU7e3MxYJBXAo1egObhYg6LMS5Alm hwt3sQAPjd5mKCqn7rO3laUv0oDCeL0hsHJZlHacTQ587aDO+N0mWCBA6OaXJD84Zce3vq JwR5uUdRzb923cQDdr1BKrx1mtYF2O4= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-343-aPtFjjfBMR2wtZd9IWYgGA-1; Tue, 02 Aug 2022 12:09:13 -0400 X-MC-Unique: aPtFjjfBMR2wtZd9IWYgGA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2873B380390F; Tue, 2 Aug 2022 16:09:13 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.194.108]) by smtp.corp.redhat.com (Postfix) with ESMTP id C1BEB2166B2A; Tue, 2 Aug 2022 16:09:10 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Cc: Anirudh Rayabharam , Wanpeng Li , Jim Mattson , Maxim Levitsky , Nathan Chancellor , Michael Kelley , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 26/26] KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up nested MSR Date: Tue, 2 Aug 2022 18:07:56 +0200 Message-Id: <20220802160756.339464-27-vkuznets@redhat.com> In-Reply-To: <20220802160756.339464-1-vkuznets@redhat.com> References: <20220802160756.339464-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" vmcs_config has cached host MSR_IA32_VMX_MISC value, use it for setting up nested MSR_IA32_VMX_MISC in nested_vmx_setup_ctls_msrs() and avoid the redundant rdmsr(). No (real) functional change intended. Reviewed-by: Jim Mattson Reviewed-by: Maxim Levitsky Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/vmx/nested.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 036a28c96947..7f8fa47e9396 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -6742,10 +6742,7 @@ void nested_vmx_setup_ctls_msrs(struct vmcs_config *= vmcs_conf, u32 ept_caps) msrs->secondary_ctls_high |=3D SECONDARY_EXEC_ENCLS_EXITING; =20 /* miscellaneous data */ - rdmsr(MSR_IA32_VMX_MISC, - msrs->misc_low, - msrs->misc_high); - msrs->misc_low &=3D VMX_MISC_SAVE_EFER_LMA; + msrs->misc_low =3D (u32)vmcs_conf->misc & VMX_MISC_SAVE_EFER_LMA; msrs->misc_low |=3D MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS | VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE | --=20 2.35.3