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    Subject[PATCH v4 14/37] KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id
    Date
    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 <vkuznets@redhat.com>
    ---
    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 <asm/mshyperv.h>

    #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 bed5e1692cef..91174f0120a2 100644
    --- a/arch/x86/kvm/svm/nested.c
    +++ b/arch/x86/kvm/svm/nested.c
    @@ -761,6 +761,8 @@ 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;
    }

    --
    2.35.3
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