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Thu, 15 Aug 2019 16:25:15 +0000 From: "Suthikulpanit, Suravee" To: "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" CC: "pbonzini@redhat.com" , "rkrcmar@redhat.com" , "joro@8bytes.org" , "graf@amazon.com" , "jschoenh@amazon.de" , "karahmed@amazon.de" , "rimasluk@amazon.com" , "Grimm, Jon" , "Suthikulpanit, Suravee" Subject: [PATCH v2 10/15] kvm: x86: hyperv: Use APICv deactivate request interface Thread-Topic: [PATCH v2 10/15] kvm: x86: hyperv: Use APICv deactivate request interface Thread-Index: AQHVU4YEMH5b0cYjFUWHrps9bHK0VQ== Date: Thu, 15 Aug 2019 16:25:15 +0000 Message-ID: <1565886293-115836-11-git-send-email-suravee.suthikulpanit@amd.com> References: <1565886293-115836-1-git-send-email-suravee.suthikulpanit@amd.com> In-Reply-To: <1565886293-115836-1-git-send-email-suravee.suthikulpanit@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [165.204.78.1] x-clientproxiedby: SN6PR04CA0084.namprd04.prod.outlook.com (2603:10b6:805:f2::25) To DM6PR12MB2844.namprd12.prod.outlook.com (2603:10b6:5:45::32) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Suravee.Suthikulpanit@amd.com; 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received-spf: None (protection.outlook.com: amd.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: lzrDuBPTMu01x//gn9p9Lo1qrSFLo4Qn37Th1dCuobwsZUSyxMak3HnLa8O7bWGaH9h6LcLAfmUtEVRFNbW7Qf1bntuRxk5icTVuUt7Xqxv/q20k65sSsZpRIwTxK/vXk9mk5/t7qN6rqcB+YW2mCJB6VUVSB1KuGg8Isx9Rjav9fxUR1MCZtZetaEoGL77UXG9k7Nle5BHta2GByZtd846wWOcr+MQS5pUmd8oBDUSwfKS++RBInGr/hFxuIZXEvO7+6wQIioT4gdnZjUAdXXbf3roa/Yz1MwnqcSIh4yrTfB2XUHR+LQOb64ObSj93TPuZF1MSyY9wpYCzZuEerGhs3LwS4rjvQn6c2vojVoHIdhFPWUNes9FPaQZHh/j/yQ3XCCr2McJAnpc0maXRD3raQObrb/+VBG00MYAQVTU= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 439d7b8d-f80f-4118-1896-08d7219d2749 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Aug 2019 16:25:15.2286 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: j2BChLOfDxh56wNFn9HfQxTe/aMSo9mme6xKORQ89tjsAzVQCXldHUrBTibpWc89Oe+zrsJ4cI9bSN3lsCP4Uw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3897 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since disabling APICv has to be done for all vcpus on AMD-based system, adopt the newly introduced kvm_make_apicv_deactivate_request() intereface. Signed-off-by: Suravee Suthikulpanit --- arch/x86/kvm/hyperv.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index a39e38f..4f71a39 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -772,9 +772,17 @@ int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool = dont_zero_synic_pages) =20 /* * Hyper-V SynIC auto EOI SINT's are - * not compatible with APICV, so deactivate APICV + * not compatible with APICV, so request + * to deactivate APICV permanently. + * + * Since this requires updating + * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, + * also take srcu lock. */ - kvm_vcpu_deactivate_apicv(vcpu); + vcpu->srcu_idx =3D srcu_read_lock(&vcpu->kvm->srcu); + kvm_make_apicv_deactivate_request(vcpu, true); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); + synic->active =3D true; synic->dont_zero_synic_pages =3D dont_zero_synic_pages; return 0; --=20 1.8.3.1