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Tue, 02 Jul 2019 15:27:56 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x62FI8tZ163587; Tue, 2 Jul 2019 15:27:56 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserp3030.oracle.com with ESMTP id 2tebaku4mk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 02 Jul 2019 15:27:56 +0000 Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x62FRsG8025450; Tue, 2 Jul 2019 15:27:55 GMT Received: from [10.30.3.6] (/213.57.127.2) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 02 Jul 2019 08:27:54 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.1 \(3445.4.7\)) Subject: Re: [PATCH 2/3] KVM: nVMX: allow setting the VMFUNC controls MSR From: Liran Alon In-Reply-To: <1562079876-20756-3-git-send-email-pbonzini@redhat.com> Date: Tue, 2 Jul 2019 18:27:49 +0300 Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, stable@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: <3E09BABA-FADF-41AD-8524-68A587197DBC@oracle.com> References: <1562079876-20756-1-git-send-email-pbonzini@redhat.com> <1562079876-20756-3-git-send-email-pbonzini@redhat.com> To: Paolo Bonzini X-Mailer: Apple Mail (2.3445.4.7) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9306 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=851 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907020166 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9306 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=903 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907020167 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On 2 Jul 2019, at 18:04, Paolo Bonzini wrote: >=20 > Allow userspace to set a custom value for the VMFUNC controls MSR, as = long > as the capabilities it advertises do not exceed those of the host. >=20 > Fixes: 27c42a1bb ("KVM: nVMX: Enable VMFUNC for the L1 hypervisor", = 2017-08-03) > Cc: stable@vger.kernel.org > Signed-off-by: Paolo Bonzini Reviewed-by: Liran Alon > --- > arch/x86/kvm/vmx/nested.c | 5 +++++ > 1 file changed, 5 insertions(+) >=20 > diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c > index c4e29ef0b21e..163d226efa96 100644 > --- a/arch/x86/kvm/vmx/nested.c > +++ b/arch/x86/kvm/vmx/nested.c > @@ -1234,6 +1234,11 @@ int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 = msr_index, u64 data) > case MSR_IA32_VMX_VMCS_ENUM: > vmx->nested.msrs.vmcs_enum =3D data; > return 0; > + case MSR_IA32_VMX_VMFUNC: > + if (data & ~vmx->nested.msrs.vmfunc_controls) > + return -EINVAL; > + vmx->nested.msrs.vmfunc_controls =3D data; > + return 0; > default: > /* > * The rest of the VMX capability MSRs do not support = restore. > --=20 > 1.8.3.1 >=20 >=20