[Bug 218267] [Sapphire Rapids][Upstream]Boot up multiple Windows VMs hang

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218267

shu.info.oss@gmail.com changed:

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                 CC|                            |shu.info.oss@gmail.com

--- Comment #10 from shu.info.oss@gmail.com ---
Hi Gao,

(In reply to Chao Gao from comment #7)
> I just checked the microcode release
> https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases.
> The microcode fix hasn't been released yet, but the erratum is already in
> SPR/EMR specification. e.g., for SPR,
> 
> SPR141. VM Exit Following MOV to CR8 Instruction May Lead to Unexpected
> IDT Vectoring-Information
> Problem: Under certain conditions, a VM exit following execution of the MOV
> to CR8
> instruction may unexpectedly result in setting the Valid bit (bit 31) of the
> IDTVectoring Information Field in the Virtual Machine Control Structure
> (VMCS).
> Implication: Depending on the operation of the virtual-machine monitor
> (VMM), this
> may result in unexpected VM behavior.
> Workaround: It may be possible for the BIOS to contain a workaround for this
> erratum

Can we resolve this bug with only BIOS updates if a update patch includes a fix
for this bug?
If so, what is ticket number for a update patch of BIOS?  it is SPR141?

Thanks,
Hidehiko Matsumoto

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