On 11/19/19 10:45 AM, Cornelia Huck wrote:
> On Tue, 19 Nov 2019 09:11:11 +0100
[...]
>>>
>>> So, what happens if we have an error other than -EEXIST (which
>>> presumably means that we already protected it) here? The page is not
>>> protected, and further accesses will get an error? (Another question:
>>> what can actually go wrong here?)
>>
>> If KVM or QEMU write into a lowcore, we will fail the integrity check on
>> import and this cpu will never run again.
>
> From the guest's POV, is that similar to a cpu going into xstop?
Not really, I'm wondering what happens, if we try to send a restart to
such a cpu.
>
>> In retrospect a warn_on_once might be the wrong error handling here.
>>
>>>
>>>> + }
>>>> if (rc) {
>>>> kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
>>>> return rc;
>>>
>>
>>
>
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