Message ID | 20180927034829.2230-13-Tianyu.Lan@microsoft.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <kvm-owner@kernel.org> 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 2BD06112B for <patchwork-kvm@patchwork.kernel.org>; Thu, 27 Sep 2018 03:50:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1C77F2B372 for <patchwork-kvm@patchwork.kernel.org>; Thu, 27 Sep 2018 03:50:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 107C92B458; Thu, 27 Sep 2018 03:50:22 +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 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 A954F2B372 for <patchwork-kvm@patchwork.kernel.org>; Thu, 27 Sep 2018 03:50:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727431AbeI0KGO (ORCPT <rfc822;patchwork-kvm@patchwork.kernel.org>); Thu, 27 Sep 2018 06:06:14 -0400 Received: from mail-sg2apc01on0117.outbound.protection.outlook.com ([104.47.125.117]:56048 "EHLO APC01-SG2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726684AbeI0KGN (ORCPT <rfc822;kvm@vger.kernel.org>); Thu, 27 Sep 2018 06:06:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=vkM1XDOasZe08xhGjYX+1tcGXbLIMOabyyqCPCQ98DY=; b=icVg3G/uUwvDwNf2/byxmP1xYS0xiMAVCGdbrT/uhxL/4LoeYOvHReMgygau4HTE/iDr6c2vQa00aO0ZG5ol8Ud4GlH9OGah4LnOR6jmc49V/LY+HjwaQfug8Z6QIqsZe13IMpZsJ8gHUAdQ9O6Jy6VpvW9mGPIgo69CkCaJjOI= Received: from HK0P153MB0129.APCP153.PROD.OUTLOOK.COM (52.133.156.18) by HK0P153MB0177.APCP153.PROD.OUTLOOK.COM (52.133.210.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1207.3; Thu, 27 Sep 2018 03:50:01 +0000 Received: from HK0P153MB0129.APCP153.PROD.OUTLOOK.COM ([fe80::8584:ad93:130a:6267]) by HK0P153MB0129.APCP153.PROD.OUTLOOK.COM ([fe80::8584:ad93:130a:6267%3]) with mapi id 15.20.1207.011; Thu, 27 Sep 2018 03:50:01 +0000 From: Tianyu Lan <Tianyu.Lan@microsoft.com> CC: Tianyu Lan <Tianyu.Lan@microsoft.com>, "pbonzini@redhat.com" <pbonzini@redhat.com>, "rkrcmar@redhat.com" <rkrcmar@redhat.com>, "tglx@linutronix.de" <tglx@linutronix.de>, "mingo@redhat.com" <mingo@redhat.com>, "hpa@zytor.com" <hpa@zytor.com>, "x86@kernel.org" <x86@kernel.org>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>, KY Srinivasan <kys@microsoft.com>, vkuznets <vkuznets@redhat.com>, Jork Loeser <Jork.Loeser@microsoft.com> Subject: [PATCH V3 12/13] KVM/VMX: Change hv flush logic when ept tables are mismatched. Thread-Topic: [PATCH V3 12/13] KVM/VMX: Change hv flush logic when ept tables are mismatched. 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Series |
x86/KVM/Hyper-v: Add HV ept tlb range flush hypercall support in KVM
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diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 533a327372c8..2869c3e78168 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) static int vmx_hv_remote_flush_tlb(struct kvm *kvm) { - int ret; + struct kvm_vcpu *vcpu; + int ret = -ENOTSUPP, i; spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock); @@ -1565,14 +1566,14 @@ static int vmx_hv_remote_flush_tlb(struct kvm *kvm) check_ept_pointer_match(kvm); if (to_kvm_vmx(kvm)->ept_pointers_match != EPT_POINTERS_MATCH) { - ret = -ENOTSUPP; - goto out; + kvm_for_each_vcpu(i, vcpu, kvm) + ret |= hyperv_flush_guest_mapping( + to_vmx(kvm_get_vcpu(kvm, i))->ept_pointer); + } else { + ret = hyperv_flush_guest_mapping( + to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer); } - ret = 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; }
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 <Tianyu.Lan@microsoft.com> --- arch/x86/kvm/vmx.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)