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

[Paolo Bonzini]

On 10/07/19 18:08, Jan Kiszka wrote:
> On 10.07.19 16:40, Paolo Bonzini wrote:
>> 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?
> 
> savevm or is there a dump function in QEMU or the kernel?

There is qemu_hexdump.

Paolo