Re: [Xen-devel] [PATCH] x86/cpuid: Enable new SSE/AVX/AVX512 cpu features

[Zhong Yang <yang.zhong@xxxxxxxxx>]

On Mon, Nov 06, 2017 at 03:39:45AM -0700, Jan Beulich wrote:
> >>> On 27.10.17 at 16:18, <yang.zhong@xxxxxxxxx> wrote:
> > Intel IceLake cpu has added new cpu features: AVX512VBMI2/GFNI/
> > VAES/AVX512VNNI/AVX512BITALG/VPCLMULQDQ. Those new cpu features
> > need expose to guest.wq
> 
> First of all, please don't forget to Cc relevant maintainers.
> 
  Thanks Jan's remind.
  
> > The bit definition:
> > CPUID.(EAX=7,ECX=0):ECX[bit 06] AVX512VBMI2
> > CPUID.(EAX=7,ECX=0):ECX[bit 08] GFNI
> > CPUID.(EAX=7,ECX=0):ECX[bit 09] VAES
> > CPUID.(EAX=7,ECX=0):ECX[bit 10] VPCLMULQDQ
> 
> These last three have VEX (and for GFNI even legacy) encodings.
> While it wouldn't be reasonable yet to request EVEX encoded insn
> support to be added to the emulator while enabling new ISA
> extensions, I think legacy and VEX encoded ones should be taken
> care of with the state the emulator is currently in.
> 
> Jan
  
  Hello Jan,

  Thanks for reviewing my patch! 
  For those new instructions, you mean i also need to support those 
  three instructions(GFNI,VAES and VPCLMULQDQ) in x86_emulate() in PV? 

  Many thanks!

  Regards,

  Yang


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel