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Thread-Topic: [PATCH 12/13] KVM/VMX: Change hv flush logic when ept tables are mismatched. Thread-Index: AQHUSOHQmms3tZ5sWk6SwXc3sY6QqA== Date: Mon, 10 Sep 2018 08:39:40 +0000 Message-ID: <20180910083806.65177-13-Tianyu.Lan@microsoft.com> References: <20180910083806.65177-1-Tianyu.Lan@microsoft.com> In-Reply-To: <20180910083806.65177-1-Tianyu.Lan@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Tianyu.Lan@microsoft.com; x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;HK0P153MB0178;6:5E0QxBoeNLzGkQ3R6Lcw/nAe2H56hwEBxHKgut3Y/zo409BCsAfzpBN8Gg6puRLq5VwlVFHjL95NOybNRC8p2+MJdRpMvbn1rdeh673ILssAiEwOS1oR+8qZ5H5wesU8oTtTPFVUpiwJo6+FHFchRFqPC9d0d7x/MqjvtMKgGPpY5+3IGKa7CJo2eQWoLcMVlMUmkIRXuqYBREgEMtoOgsAYVEziAACB1vzykaG1l7ACzTsQ1ihk3sl+UP5rtp9vD+C51GSa3/4mqEtTUSO7TWGvy2v8qd1V9pU5jn8Q1hv5isXKAojpDus2aeoSl1Cy2I/pt7E/fdevXWeR41nUSSApmgnwYa7Y1i18qXIRVIeKogWM1WM9od8+o/qes2Og+lktw6jXwClu1SbIZwIs4i7wGu3C3YXenK7lTFzagVqUnJnFP+YpeDfZiKFTSX7qWYb4x5PPGjJKFGYBTg5xUg==;5:ZlDUVBpFcAB/St4/SxIAnY/xx9LAN2vrxosCQPY8oxP2Zg2XVST9hKGmYHTrj7dsJKyjTsAuWKhuwN12L5kFlZps4KlTIp4tuzt8x1b9XD2Ll50+H510W5MYi/ZOjg7hv+/F77t0FZoBOWNuMAHr0FdYPuypaKukFOuuz1VQ7iE=;7:+tdTG20dZp2oM3gcDWqyFpALOvDFZk84fM2EbTdQQ4EiLoFD1oSpE6Y+09TTfpNINLnm+9AIdjVgvepTH9/JeQY+GzLc91DSH4ixMjHzC7ObfMGfwYKbtNYvRUXKkDncyrQAvnNhTMwMVBIMWw4cB+oRZYo1RhPOFipJqyhB1QiQmJOhl44kOzPTwgfH9WpAcR8z4MEA//3U4Ds+EFJmBdmDMkIQufcL2psNHxOSEB1UvugRDgeO1QCf2W6brGKW x-ms-office365-filtering-correlation-id: 450082d2-7937-46a0-f0ac-08d616f8f330 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:HK0P153MB0178; x-ms-traffictypediagnostic: HK0P153MB0178: x-ld-processed: 72f988bf-86f1-41af-91ab-2d7cd011db47,ExtAddr x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171); x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(8121501046)(5005006)(3002001)(93006095)(93001095)(3231311)(944501410)(52105095)(10201501046)(6055026)(149027)(150027)(6041310)(20161123562045)(20161123558120)(20161123560045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(201708071742011)(7699050);SRVR:HK0P153MB0178;BCL:0;PCL:0;RULEID:;SRVR:HK0P153MB0178; x-forefront-prvs: 07915F544A x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(376002)(39850400004)(136003)(366004)(346002)(396003)(189003)(199004)(7736002)(14454004)(478600001)(105586002)(36756003)(97736004)(305945005)(4326008)(10090500001)(486006)(53936002)(99286004)(5660300001)(10290500003)(6116002)(6436002)(72206003)(446003)(76176011)(11346002)(1671002)(2906002)(2616005)(6486002)(59246006)(476003)(66066001)(107886003)(109986005)(68736007)(8676002)(14444005)(54906003)(81156014)(81166006)(5250100002)(256004)(1076002)(6506007)(316002)(22452003)(26005)(25786009)(8936002)(6512007)(102836004)(86612001)(106356001)(3846002)(2900100001)(575784001)(86362001);DIR:OUT;SFP:1102;SCL:1;SRVR:HK0P153MB0178;H:HK0P153MB0129.APCP153.PROD.OUTLOOK.COM;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: 47y46UE/SAHsxfMjloIO0UJTxCN7Onhqd/4cKUbQdZ/eb+GbhEc2li/0cT5CoXj2ywBZvN4sdPU+V+sqEeZFg9l/9C+RVObyDF19bmt1qF8awUpyPcxZaTslM40CS6o7hGcVCwdHeCfTmAdzS0uny3XF2Qtula+wSLh6VqsoqZLOGg6Y6uUI505pxALCxQRkUeEGFTPEeO9ZfbKQSDvsw6OwxopGZ9l6s5jWXHjZaqbMdt/b6aYYZVMJyxW8gMd4DPNTMi4sTKSSbOMA0Pvj8wQbuj84fdt6NRqRgBdedKJdzPU00qOsa7t4VTlwwdCBW5UVuuVr1v61aSFYkqKL6G7n4ofQRucfBV303hV9+SE= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 450082d2-7937-46a0-f0ac-08d616f8f330 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Sep 2018 08:39:40.3482 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: HK0P153MB0178 To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If ept table pointers are mismatched, flushing tlb for each vcpus via hv flush interface still helps to reduce vmexits which are triggered by IPI and INEPT emulation. Signed-off-by: Lan Tianyu --- arch/x86/kvm/vmx.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index f910d33858d9..3f9ccbafd0d8 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1557,7 +1557,8 @@ static void check_ept_pointer_match(struct kvm *kvm) =20 static int vmx_hv_remote_flush_tlb(struct kvm *kvm) { - int ret; + struct kvm_vcpu *vcpu; + int ret =3D -ENOTSUPP, i; =20 spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock); =20 @@ -1565,14 +1566,14 @@ static int vmx_hv_remote_flush_tlb(struct kvm *kvm) check_ept_pointer_match(kvm); =20 if (to_kvm_vmx(kvm)->ept_pointers_match !=3D EPT_POINTERS_MATCH) { - ret =3D -ENOTSUPP; - goto out; + kvm_for_each_vcpu(i, vcpu, kvm) + ret |=3D hyperv_flush_guest_mapping( + to_vmx(kvm_get_vcpu(kvm, i))->ept_pointer); + } else { + ret =3D hyperv_flush_guest_mapping( + to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer); } =20 - ret =3D hyperv_flush_guest_mapping( - to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer); - -out: spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock); return ret; } --=20 2.14.4