Re: List of unaccessible x86 states

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Marcelo Tosatti wrote:
> On Tue, Oct 20, 2009 at 03:01:15PM +0200, 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?)
> 
> Should save/restore the MCE MSRs (its contents are currently
> lost/overwritten AFAICS).
> 
> MTRR contents are also dropped.

Hmm, the code path is winding, but aren't they already available to user
space via GET/SET_MSRS?

Jan
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