Steven Price <steven.price@xxxxxxx> writes:
....
> +static int rec_exit_ripas_change(struct kvm_vcpu *vcpu)
> +{
> + struct kvm *kvm = vcpu->kvm;
> + struct realm *realm = &kvm->arch.realm;
> + struct realm_rec *rec = &vcpu->arch.rec;
> + unsigned long base = rec->run->exit.ripas_base;
> + unsigned long top = rec->run->exit.ripas_top;
> + unsigned long ripas = rec->run->exit.ripas_value & 1;
> + unsigned long top_ipa;
> + int ret = -EINVAL;
> +
> + if (realm_is_addr_protected(realm, base) &&
> + realm_is_addr_protected(realm, top - 1)) {
> + kvm_mmu_topup_memory_cache(&vcpu->arch.mmu_page_cache,
> + kvm_mmu_cache_min_pages(vcpu->arch.hw_mmu));
> + write_lock(&kvm->mmu_lock);
> + ret = realm_set_ipa_state(vcpu, base, top, ripas, &top_ipa);
> + write_unlock(&kvm->mmu_lock);
> + }
> +
> + WARN(ret && ret != -ENOMEM,
> + "Unable to satisfy SET_IPAS for %#lx - %#lx, ripas: %#lx\n",
> + base, top, ripas);
> +
> + /* Exit to VMM to complete the change */
> + kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false,
> + ripas == 1);
> +
> + return 0;
> +}
> +
arch/arm64/kvm/rme-exit.c:100:6: warning: variable 'top_ipa' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (realm_is_addr_protected(realm, base) &&
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/rme-exit.c:114:44: note: uninitialized use occurs here
kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false,
^~~~~~~
-aneesh
