diff mbox series

[v5,14/37] KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id

Message ID 20220527155546.1528910-15-vkuznets@redhat.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86: hyper-v: Fine-grained TLB flush + L2 TLB flush features | expand

Commit Message

Vitaly Kuznetsov May 27, 2022, 3:55 p.m. UTC 
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 mbox series

Patch

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 2cf92c12706a..7bf35f3345c2 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;
 }