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KVM: nVMX: Keep track of hv_vm_id/hv_vp_id when eVMCS is in use

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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.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-20-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2022-11-01 15:53:57 +01:00 committed by Paolo Bonzini
parent 7d5e88d301
commit 38edb45231
2 changed files with 21 additions and 0 deletions
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6
arch/x86/include/asm/kvm_host.h
View file

@ -668,6 +668,12 @@ struct kvm_vcpu_hv {
/* Preallocated buffer for handling hypercalls passing sparse vCPU set */
u64 sparse_banks[HV_MAX_SPARSE_VCPU_BANKS];
struct {
u64 pa_page_gpa;
u64 vm_id;
u32 vp_id;
} nested;
};
/* Xen HVM per vcpu emulation context */

15
arch/x86/kvm/vmx/nested.c
View file

@ -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,
@ -1557,11 +1564,19 @@ 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;