Re: [Xen-devel] Save paused cpu ctx

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 19.09.18 at 10:21, <aisaila@xxxxxxxxxxxxxxx> wrote:
> I want to restart the discussion on dropping the "if ( v->pause_flags &
> VPF_down )" from hvm_save_cpu_ctxt() and be able to save context in a
> vcup down state. The content of the ctx could be filled like it is
> described in Intel SDM, "9.1.1 Processor State After Reset" (https://so 
> ftware.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-
> 2abcd-3abcd.pdf   page 2996).
> 
> Is this enough to be up streamed?

Along the lines of what Roger has said - without knowing _why_ you
want to do that, it's hard to tell. It's pretty clear I think that we don't
want to outright drop the condition, the question is just whether to
somewhat relax it for your purposes.

I'm afraid I also don't agree with your assertion that a down vCPU is
in "after reset" state: To me, such a vCPU could legitimately be
considered to be in that state, in the state it was in when it went
down, or in basically any other (perhaps random) state.

Finally (and I'm sorry for being picky here) - why was this inquiry
addressed _To_ me instead of the list?

Jan



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