Re: List of unaccessible x86 states

[Jan Kiszka <jan.kiszka@siemens.com>]

Alexander Graf wrote:
> On 20.10.2009, at 15:01, Jan Kiszka wrote:
> 
>> Hi all,
>>
>> as the list of yet user-unaccessible x86 states is a bit volatile ATM,
>> this is an attempt to collect the precise requirements for additional
>> state fields. Once everyone feels the list is complete, we can decide
>> how to partition it into one ore more substates for the new
>> KVM_GET/SET_VCPU_STATE interface.
>>
>> What I read so far (or tried to patch already):
>>
>> - nmi_masked
>> - nmi_pending
>> - nmi_injected
>> - kvm_queued_exception (whole struct content)
>> - KVM_REQ_TRIPLE_FAULT (from vcpu.requests)
>>
>> Unclear points (for me) from the last discussion:
>>
>> - sipi_vector
>> - MCE (covered via kvm_queued_exception, or does it require more?)
>>
>> Please extend or correct the list as required.
> 
> hflags. Qemu supports GIF, kvm supports GIF, but no side knows how to  
> sync it.

OK. Whole hflags or just the GIF bit?

If we allow access to all bits, can user space cause any problems
(beyond screwing up its guests) by passing weird patterns?

Jan

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