Re: port-amd64/57661: Crash when booting on Xeon Silver 4416+ in KVM/Qemu

[Harold Gutch <logix%foobar.franken.de@localhost>]

Success for me (in a VM) with your patch.

  [     1.000004] cpu0 at mainbus0 apid 0
  [     1.000004] cpu0: Use lfence to serialize rdtsc
  [     1.000004] cpu0: Intel(R) Xeon(R) Silver 4416+, id 0x806f8
  [     1.000004] cpu0: node 0, package 0, core 0, smt 0
  [...]

and the system reaches multiuser.

  : {7} ./xfeat2
  XFeatureSupportedMask[0:31]	= 0x602e7<x87 FPU/MMX,SSE,AVX,Opmask,ZMM_Hi256,Hi16_ZMM,PKRU>
  XFeatureEnabledSizeMask		= 0xa80
  XFeatureSupportedSizeMask	= 0x2b00
  XFeatureSupportedMask[32:63]	= 0
  xcr0				= 0xe7<x87 FPU/MMX,SSE,AVX,Opmask,ZMM_Hi256,Hi16_ZMM>


thanks!
  Harold