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[82.81.161.50]) by smtp.gmail.com with ESMTPSA id bm13-20020a05620a198d00b006a6d83fc9efsm1031130qkb.21.2022.06.07.02.36.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jun 2022 02:36:42 -0700 (PDT) Message-ID: Subject: Re: [PATCH v6 14/38] KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id From: Maxim Levitsky To: Vitaly Kuznetsov , kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 07 Jun 2022 12:36:38 +0300 In-Reply-To: <20220606083655.2014609-15-vkuznets@redhat.com> References: <20220606083655.2014609-1-vkuznets@redhat.com> <20220606083655.2014609-15-vkuznets@redhat.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.40.4 (3.40.4-2.fc34) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2022-06-06 at 10:36 +0200, Vitaly Kuznetsov wrote: > Similar to nSVM, KVM needs to know L2's VM_ID/VP_ID and Partition > assist page address to handle L2 TLB flush requests. > > Signed-off-by: Vitaly Kuznetsov > --- >  arch/x86/kvm/svm/hyperv.h | 16 ++++++++++++++++ >  arch/x86/kvm/svm/nested.c |  2 ++ >  2 files changed, 18 insertions(+) > > diff --git a/arch/x86/kvm/svm/hyperv.h b/arch/x86/kvm/svm/hyperv.h > index 7d6d97968fb9..8cf702fed7e5 100644 > --- a/arch/x86/kvm/svm/hyperv.h > +++ b/arch/x86/kvm/svm/hyperv.h > @@ -9,6 +9,7 @@ >  #include >   >  #include "../hyperv.h" > +#include "svm.h" >   >  /* >   * Hyper-V uses the software reserved 32 bytes in VMCB > @@ -32,4 +33,19 @@ struct hv_enlightenments { >   */ >  #define VMCB_HV_NESTED_ENLIGHTENMENTS VMCB_SW >   > +static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu) > +{ > +       struct vcpu_svm *svm = to_svm(vcpu); > +       struct hv_enlightenments *hve = > +               (struct hv_enlightenments *)svm->nested.ctl.reserved_sw; > +       struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); > + > +       if (!hv_vcpu) > +               return; > + > +       hv_vcpu->nested.pa_page_gpa = hve->partition_assist_page; > +       hv_vcpu->nested.vm_id = hve->hv_vm_id; > +       hv_vcpu->nested.vp_id = hve->hv_vp_id; > +} > + >  #endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */ > diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c > index 88da8edbe1e1..e8908cc56e22 100644 > --- a/arch/x86/kvm/svm/nested.c > +++ b/arch/x86/kvm/svm/nested.c > @@ -811,6 +811,8 @@ int enter_svm_guest_mode(struct kvm_vcpu *vcpu, u64 vmcb12_gpa, >         if (kvm_vcpu_apicv_active(vcpu)) >                 kvm_make_request(KVM_REQ_APICV_UPDATE, vcpu); >   > +       nested_svm_hv_update_vm_vp_ids(vcpu); > + >         return 0; >  } >   Reviewed-by: Maxim Levitsky Best regards, Maxim Levitsky