On Thu, 2022-04-14 at 15:19 +0200, Vitaly Kuznetsov wrote: > To handle L2 TLB flush requests, KVM needs to keep track of L2's VM_ID/ > VP_IDs which are set by L1 hypervisor. 'Partition assist page' address is > also needed to handle post-flush exit to L1 upon request. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > --- > arch/x86/include/asm/kvm_host.h | 6 ++++++ > arch/x86/kvm/vmx/nested.c | 15 +++++++++++++++ > 2 files changed, 21 insertions(+) > > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h > index 837c07e213de..8b2a52bf26c0 100644 > --- a/arch/x86/include/asm/kvm_host.h > +++ b/arch/x86/include/asm/kvm_host.h > @@ -622,6 +622,12 @@ struct kvm_vcpu_hv { > > /* Preallocated buffer for handling hypercalls passing sparse vCPU set */ > u64 sparse_banks[64]; > + > + struct { > + u64 pa_page_gpa; > + u64 vm_id; > + u32 vp_id; > + } nested; > }; > > /* Xen HVM per vcpu emulation context */ > diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c > index a6688663da4d..ee88921c6156 100644 > --- a/arch/x86/kvm/vmx/nested.c > +++ b/arch/x86/kvm/vmx/nested.c > @@ -225,6 +225,7 @@ static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx) > > static inline void nested_release_evmcs(struct kvm_vcpu *vcpu) > { > + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); > struct vcpu_vmx *vmx = to_vmx(vcpu); > > if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) { > @@ -233,6 +234,12 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu) > } > > vmx->nested.hv_evmcs_vmptr = EVMPTR_INVALID; > + > + if (hv_vcpu) { > + hv_vcpu->nested.pa_page_gpa = INVALID_GPA; > + hv_vcpu->nested.vm_id = 0; > + hv_vcpu->nested.vp_id = 0; > + } > } > > static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx, > @@ -1591,11 +1598,19 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields > { > struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12; > struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs; > + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(&vmx->vcpu); > > /* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE */ > vmcs12->tpr_threshold = evmcs->tpr_threshold; > vmcs12->guest_rip = evmcs->guest_rip; > > + if (unlikely(!(hv_clean_fields & > + HV_VMX_ENLIGHTENED_CLEAN_FIELD_ENLIGHTENMENTSCONTROL))) { > + hv_vcpu->nested.pa_page_gpa = evmcs->partition_assist_page; > + hv_vcpu->nested.vm_id = evmcs->hv_vm_id; > + hv_vcpu->nested.vp_id = evmcs->hv_vp_id; > + } > + > if (unlikely(!(hv_clean_fields & > HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC))) { > vmcs12->guest_rsp = evmcs->guest_rsp; Reviewed-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx> Best regards, Maxim Levitsky