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KVM: arm64: Use vcpu_idx for invalidation tracking

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While vcpu_id isn't necessarily a bad choice as an identifier for
the currently running vcpu, it is provided by userspace, and there
is close to no guarantee that it would be unique.

Switch it to vcpu_idx instead, for which we have much stronger
guarantees.

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230927090911.3355209-7-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Marc Zyngier
2023-09-27 10:09:06 +01:00
committed by Oliver Upton
parent ac0fe56d46
commit 5f4bd815ec
1 changed files with 2 additions and 2 deletions
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arch/arm64/kvm/arm.c
+2 -2
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@@ -438,9 +438,9 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
* We might get preempted before the vCPU actually runs, but
* over-invalidation doesn't affect correctness.
*/
if (*last_ran != vcpu->vcpu_id) {
if (*last_ran != vcpu->vcpu_idx) {
kvm_call_hyp(__kvm_flush_cpu_context, mmu);
*last_ran = vcpu->vcpu_id;
*last_ran = vcpu->vcpu_idx;
}
vcpu->cpu = cpu;