Re: List of unaccessible x86 states

[Jan Kiszka <jan.kiszka@web.de>]

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Marcelo Tosatti wrote:
> On Fri, Oct 23, 2009 at 03:08:21PM +0200, Jan Kiszka wrote:
>> 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?
> 
> Yes, nevermind, irrelevant to the current discussion.
> 

Oh, then I misunderstood your original reply as "we need to add them to
the list as well". Even better.

Jan


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