Re: [Qemu-devel] [PULL 22/25] target/i386: kvm: Add nested migration blocker only when kernel lacks required capabilities

[Paolo Bonzini]

On 08/07/19 20:31, Jan Kiszka wrote:
>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>>          error_report("Guest enabled nested virtualization but kernel "
>>                  "does not support saving of nested state");
>>          return -EINVAL;
>>
> Starting with this commit latest (bisection issue...), running Jailhouse in a
> guest first stalls L1 (looks like we lose interrupts), and if I try to reset
> that VM, I lose my host as well:

If 5.2 is still broken, can you gather a dump of KVM_SET_NESTED_STATE's
payload?

Paolo