[PATCH 3/4] KVM: arm64: Key unpin_host_sve_state() on the state it unpins

[Fuad Tabba]

unpin_host_sve_state() gates on the VM's SVE feature bit, but what it
unpins is the state pkvm_vcpu_init_sve() pinned. A vCPU that completed
init has sve_state set exactly when that bit is set, so the two agree.
Gate on sve_state, which is what is being unpinned.

Signed-off-by: Fuad Tabba <fuad.tabba at linux.dev>
---
 arch/arm64/kvm/hyp/nvhe/pkvm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c
index 73e6ee059eebb..1d8cc984fb88c 100644
--- a/arch/arm64/kvm/hyp/nvhe/pkvm.c
+++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c
@@ -398,10 +398,10 @@ static void unpin_host_sve_state(struct pkvm_hyp_vcpu *hyp_vcpu)
 {
 	void *sve_state;
 
-	if (!vcpu_has_feature(&hyp_vcpu->vcpu, KVM_ARM_VCPU_SVE))
+	sve_state = hyp_vcpu->vcpu.arch.sve_state;
+	if (!sve_state)
 		return;
 
-	sve_state = hyp_vcpu->vcpu.arch.sve_state;
 	hyp_unpin_shared_mem(sve_state,
 			     sve_state + vcpu_sve_state_size(&hyp_vcpu->vcpu));
 }
-- 
2.39.5