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 <vkuznets@xxxxxxxxxx>
> ---
> 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 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 <mlevitsk@xxxxxxxxxx>
Best regards,
Maxim Levitsky
