From nobody Wed Apr 8 03:08:40 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D920BFA374E for ; Fri, 21 Oct 2022 15:38:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230457AbiJUPiG (ORCPT ); Fri, 21 Oct 2022 11:38:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229919AbiJUPgj (ORCPT ); Fri, 21 Oct 2022 11:36:39 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A55D26FFA4 for ; Fri, 21 Oct 2022 08:36:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666366589; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YeOvcAcktGffM/uokWRhmV+SC84/jZMPzTYUbJ0A4ws=; b=gR6pCthD78M4BV87xsC+UD7Sq2UCEbtIpz2cMY8ZHH5NFTbKieq8CmsCJcljQu6PQlz6Ek 46ZmLMi8yfJVnUDd7ATNT744mlj5yQ3rx2PXoVKMHf2c41gEds/FG/APWPi9plziWwMv63 OuDygNlr50YusYAhRVzJ8e4G8vw+rF4= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-412-77_VLxylPh-y2O5_4E6bwQ-1; Fri, 21 Oct 2022 11:36:21 -0400 X-MC-Unique: 77_VLxylPh-y2O5_4E6bwQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8CAFE101CC62; Fri, 21 Oct 2022 15:36:17 +0000 (UTC) Received: from ovpn-192-65.brq.redhat.com (ovpn-192-65.brq.redhat.com [10.40.192.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8F82140CA41F; Fri, 21 Oct 2022 15:36:15 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Cc: Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v12 21/46] KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook Date: Fri, 21 Oct 2022 17:34:56 +0200 Message-Id: <20221021153521.1216911-22-vkuznets@redhat.com> In-Reply-To: <20221021153521.1216911-1-vkuznets@redhat.com> References: <20221021153521.1216911-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Hyper-V supports injecting synthetic L2->L1 exit after performing L2 TLB flush operation but the procedure is vendor specific. Introduce .hv_inject_synthetic_vmexit_post_tlb_flush nested hook for it. Reviewed-by: Maxim Levitsky Signed-off-by: Vitaly Kuznetsov --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/Makefile | 3 ++- arch/x86/kvm/svm/hyperv.c | 11 +++++++++++ arch/x86/kvm/svm/hyperv.h | 2 ++ arch/x86/kvm/svm/nested.c | 1 + arch/x86/kvm/vmx/hyperv.c | 4 ++++ arch/x86/kvm/vmx/hyperv.h | 1 + arch/x86/kvm/vmx/nested.c | 1 + 8 files changed, 23 insertions(+), 1 deletion(-) create mode 100644 arch/x86/kvm/svm/hyperv.c diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h index ede163b6f955..cccaf423f4d9 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1695,6 +1695,7 @@ struct kvm_x86_nested_ops { int (*enable_evmcs)(struct kvm_vcpu *vcpu, uint16_t *vmcs_version); uint16_t (*get_evmcs_version)(struct kvm_vcpu *vcpu); + void (*hv_inject_synthetic_vmexit_post_tlb_flush)(struct kvm_vcpu *vcpu); }; =20 struct kvm_x86_init_ops { diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index 4412f0b8244c..7ac6ea23122f 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -25,7 +25,8 @@ kvm-intel-y +=3D vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o= vmx/vmcs12.o \ vmx/hyperv.o vmx/nested.o vmx/posted_intr.o kvm-intel-$(CONFIG_X86_SGX_KVM) +=3D vmx/sgx.o =20 -kvm-amd-y +=3D svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o = svm/sev.o +kvm-amd-y +=3D svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o \ + svm/sev.o svm/hyperv.o =20 ifdef CONFIG_HYPERV kvm-amd-y +=3D svm/svm_onhyperv.o diff --git a/arch/x86/kvm/svm/hyperv.c b/arch/x86/kvm/svm/hyperv.c new file mode 100644 index 000000000000..911f51021af1 --- /dev/null +++ b/arch/x86/kvm/svm/hyperv.c @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AMD SVM specific code for Hyper-V on KVM. + * + * Copyright 2022 Red Hat, Inc. and/or its affiliates. + */ +#include "hyperv.h" + +void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu) +{ +} diff --git a/arch/x86/kvm/svm/hyperv.h b/arch/x86/kvm/svm/hyperv.h index e97d80974e72..7564bdf652e4 100644 --- a/arch/x86/kvm/svm/hyperv.h +++ b/arch/x86/kvm/svm/hyperv.h @@ -25,4 +25,6 @@ static inline void nested_svm_hv_update_vm_vp_ids(struct = kvm_vcpu *vcpu) hv_vcpu->nested.vp_id =3D hve->hv_vp_id; } =20 +void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu); + #endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */ diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 45bab740f3f0..05889d5a8629 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -1721,4 +1721,5 @@ struct kvm_x86_nested_ops svm_nested_ops =3D { .get_nested_state_pages =3D svm_get_nested_state_pages, .get_state =3D svm_get_nested_state, .set_state =3D svm_set_nested_state, + .hv_inject_synthetic_vmexit_post_tlb_flush =3D svm_hv_inject_synthetic_vm= exit_post_tlb_flush, }; diff --git a/arch/x86/kvm/vmx/hyperv.c b/arch/x86/kvm/vmx/hyperv.c index 5e239158174e..f05464db4fdc 100644 --- a/arch/x86/kvm/vmx/hyperv.c +++ b/arch/x86/kvm/vmx/hyperv.c @@ -506,3 +506,7 @@ int nested_enable_evmcs(struct kvm_vcpu *vcpu, =20 return 0; } + +void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu) +{ +} diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h index 99a151af7a81..8efaffe9215b 100644 --- a/arch/x86/kvm/vmx/hyperv.h +++ b/arch/x86/kvm/vmx/hyperv.h @@ -243,5 +243,6 @@ int nested_enable_evmcs(struct kvm_vcpu *vcpu, uint16_t *vmcs_version); void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index,= u64 *pdata); int nested_evmcs_check_controls(struct vmcs12 *vmcs12); +void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu); =20 #endif /* __KVM_X86_VMX_HYPERV_H */ diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 7a4260416d88..a89b8e6f90f3 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -6996,4 +6996,5 @@ struct kvm_x86_nested_ops vmx_nested_ops =3D { .write_log_dirty =3D nested_vmx_write_pml_buffer, .enable_evmcs =3D nested_enable_evmcs, .get_evmcs_version =3D nested_get_evmcs_version, + .hv_inject_synthetic_vmexit_post_tlb_flush =3D vmx_hv_inject_synthetic_vm= exit_post_tlb_flush, }; --=20 2.37.3