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Fri, 13 Sep 2019 19:01:00 +0000 From: "Suthikulpanit, Suravee" To: "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" CC: "pbonzini@redhat.com" , "rkrcmar@redhat.com" , "joro@8bytes.org" , "vkuznets@redhat.com" , "graf@amazon.com" , "jschoenh@amazon.de" , "karahmed@amazon.de" , "rimasluk@amazon.com" , "Grimm, Jon" , "Suthikulpanit, Suravee" Subject: [PATCH v3 09/16] kvm: x86: hyperv: Use APICv deactivate request interface Thread-Topic: [PATCH v3 09/16] kvm: x86: hyperv: Use APICv deactivate request interface Thread-Index: AQHVamWV0w32d528XUiZH8DFeQLFEw== Date: Fri, 13 Sep 2019 19:01:00 +0000 Message-ID: <1568401242-260374-10-git-send-email-suravee.suthikulpanit@amd.com> References: <1568401242-260374-1-git-send-email-suravee.suthikulpanit@amd.com> In-Reply-To: <1568401242-260374-1-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: SN6PR08CA0021.namprd08.prod.outlook.com (2603:10b6:805:66::34) 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: qiLzBCM0kkL5qNj3DovJOA1Vtb7yNNT6L9TxLncKorhkNysFOBmSTht5TCrcHDSR1Mj0ae4hX3wBBVtKOp7OJdyIr0msC3kZX1D9/zr4y+35ehcGP4ItghsV820hHJlnOvLFx2HdDkKxQ03yBHbu6lb58lSHA2RV6La+Ae/voqIkIUOEtE51B1rgh+YrtOkBVrdPHAqYMOOxoYV8giN1fAVdWFEkF1U/5PpRsOelM0Pgxju/XILZc38pz98v1pmtjI284zbcutenOyurfXWf3WGE1TTGHIk8+NMCWLxBW4OTfZZqQ75jjylCcfvLXofrpBIQ1aWtcw//kJldgwHH6ZPLXNazf7n6R8oEqFWmi2m80mrgKWspYZE5DHB4gaALmSdgCbMfr4jdHCfxmq4YNHNM4waOxDLisvaBSezyhug= MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0a1352b0-97ba-4633-fd19-08d7387cb786 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Sep 2019 19:01:00.5210 (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: ayKe11hJ+/SsD6ytpbsPbipBbR9iijWcwNuzO5TjGzIj7ut2uxy50GS7KrAF6LximRrPOsm+aYvUs8wptJr2KQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3804 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@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() interface. 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 c10a8b1..1d011b4 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) /* * 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 = srcu_read_lock(&vcpu->kvm->srcu); + kvm_make_apicv_deactivate_request(vcpu, true); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); + synic->active = true; synic->dont_zero_synic_pages = dont_zero_synic_pages; return 0;