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Re: [Qemu-devel] [PULL 22/25] target/i386: kvm: Add nested migration blo

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PULL 22/25] target/i386: kvm: Add nested migration blocker only when kernel lacks required capabilities
Date: Wed, 10 Jul 2019 18:34:29 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2

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.


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