Re: [Xen-devel] [PATCH 00/11] Alternate p2m: support multiple copies of host p2m

[Ed White <edmund.h.white@xxxxxxxxx>]

> 
>> As I said in discussion with Andrew, my aim was to make it possible
>> for these same changes to be extensible to AMD processors if they
>> support multiple copies of whatever their EPT equivalent is, by
>> simply emulating VMFUNC and #VE. That's why there are some wrappers
>> in the implementation that appear redundant.
> 
> Yep, understood, and thank you for that.  But I think there was one
> function (to find a p2m by eptp) that's defined in vmx.c and only ever
> called from there -- that doesn't need an arch-specific wrapper,
> because an eventual AMD equivalent would also be entirely contained
> within svm.c.
> 

I think you're referring to p2m_find_altp2m_by_eptp(), defined in
p2m.c but only called from vmx.c. That might more properly be
p2m_find_altp2m_by_whatever_the_hardware_uses(), which is why I
put it there. I assumed it would have value for AMD.

Ed


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