[PATCH v12 21/84] KVM: nVMX: Rely on kvm_vcpu_unmap() to track validity of eVMCS mapping

Sean Christopherson
2024-07-27T00:01:21Z

Remove the explicit evmptr12 validity check when deciding whether or not
to unmap the eVMCS pointer, and instead rely on kvm_vcpu_unmap() to play
nice with a NULL map->hva, i.e. to do nothing if the map is invalid.

Note, vmx->nested.hv_evmcs_map is zero-allocated along with the rest of
vcpu_vmx, i.e. the map starts out invalid/NULL.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/vmx/nested.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 2392a7ef254d..a34b49ea64b5 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -231,11 +231,8 @@ 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 (nested_vmx_is_evmptr12_valid(vmx)) {
- kvm_vcpu_unmap(vcpu, &vmx->nested.hv_evmcs_map, true);
- vmx->nested.hv_evmcs = NULL;
- }
-
+ kvm_vcpu_unmap(vcpu, &vmx->nested.hv_evmcs_map, true);
+ vmx->nested.hv_evmcs = NULL;
vmx->nested.hv_evmcs_vmptr = EVMPTR_INVALID;

if (hv_vcpu) {