From patchwork Wed Apr 24 23:17:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Krish Sadhukhan X-Patchwork-Id: 10915917 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 83EBE922 for ; Wed, 24 Apr 2019 23:44:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7168328BDE for ; Wed, 24 Apr 2019 23:44:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6370A28BE1; Wed, 24 Apr 2019 23:44:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 086A228BDE for ; Wed, 24 Apr 2019 23:44:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388075AbfDXXoE (ORCPT ); Wed, 24 Apr 2019 19:44:04 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:55622 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388005AbfDXXoE (ORCPT ); Wed, 24 Apr 2019 19:44:04 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x3ONd0iP113906; Wed, 24 Apr 2019 23:43:40 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=QdbNTuhjSd73wmA4HqHN2i0kd0w0jXbM2QC2S2KwePU=; b=znp7BrFh1D3DuxxEMBIozXABH9tLDfDoyoqHojyGIFJPm5BODyxtv8Bvlaj8qnTiP9SP ekqzCN1nU20h3CHdDvuAVyejwpj8b4NM8zK3DuHbaq9T331+CIKbst6rk+OSXUsJQCoR yFoTdFVWUZtOccSD9iMv5MKWV8EKYyVofdYFo6/a8/tw6lINYfvTs5yKzvO6hlgppaJs RdHnSayNaRwbrqWWN5MtfBgwQ4WxU205lPonb0IZD509FajJuSp4WHGr+7mM4YUWhQhi vo4pjzpmYCVR9IirrrjN7WO6rzxz5+Ryy/th7wMuFZIxOqyzlQ3ajCLlc/pWRZYhUjKN Dg== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2130.oracle.com with ESMTP id 2rytut598w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 24 Apr 2019 23:43:40 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x3ONgTSg131585; Wed, 24 Apr 2019 23:43:39 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserp3020.oracle.com with ESMTP id 2s0fv3u6xe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 24 Apr 2019 23:43:39 +0000 Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x3ONhcNc004921; Wed, 24 Apr 2019 23:43:38 GMT Received: from ban25x6uut29.us.oracle.com (/10.153.73.29) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 24 Apr 2019 16:43:37 -0700 From: Krish Sadhukhan To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, rkrcmar@redhat.com, jmattson@google.com Subject: [PATCH 6/8][KVM nVMX]: Load IA32_PERF_GLOBAL_CTRL MSR on vmentry of nested guests Date: Wed, 24 Apr 2019 19:17:22 -0400 Message-Id: <20190424231724.2014-7-krish.sadhukhan@oracle.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190424231724.2014-1-krish.sadhukhan@oracle.com> References: <20190424231724.2014-1-krish.sadhukhan@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9237 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904240162 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9237 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904240162 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP According to section "Loading Guest State" in Intel SDM vol 3C, the IA32_PERF_GLOBAL_CTRL MSR is loaded on vmentry of nested guests: "If the “load IA32_PERF_GLOBAL_CTRL” VM-entry control is 1, the IA32_PERF_GLOBAL_CTRL MSR is loaded from the IA32_PERF_GLOBAL_CTRL field." Signed-off-by: Krish Sadhukhan Suggested-by: Jim Mattson Reviewed-by: Karl Heubaum --- arch/x86/kvm/vmx/nested.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index a7bf19eaa70b..8177374886a9 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2300,6 +2300,10 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask; vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); + if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) + vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL, + vmcs12->guest_ia32_perf_global_ctrl); + if (vmx->nested.nested_run_pending && (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT)) { vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat);