[PATCH v12 20/46] KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id

[Vitaly Kuznetsov]

Similar to nSVM, KVM needs to know L2's VM_ID/VP_ID and Partition
assist page address to handle L2 TLB flush requests.

Reviewed-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
 arch/x86/kvm/svm/hyperv.h | 15 +++++++++++++++
 arch/x86/kvm/svm/nested.c |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/arch/x86/kvm/svm/hyperv.h b/arch/x86/kvm/svm/hyperv.h
index c59544cdf03b..e97d80974e72 100644
--- a/arch/x86/kvm/svm/hyperv.h
+++ b/arch/x86/kvm/svm/hyperv.h
@@ -9,5 +9,20 @@
 #include <asm/mshyperv.h>
 
 #include "../hyperv.h"
+#include "svm.h"
+
+static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu)
+{
+	struct vcpu_svm *svm = to_svm(vcpu);
+	struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
+	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 c2a49aa50a58..45bab740f3f0 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -799,6 +799,8 @@ 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;
 }
 
-- 
2.37.3