Re: [PATCH] x86/msr: handle IA32_THERM_STATUS

[Jan Beulich <jbeulich@xxxxxxxx>]

On 07.10.2020 12:20, Roger Pau Monne wrote:
> Windows 8 will attempt to read MSR_IA32_THERM_STATUS and panic if a
> #GP fault is injected as a result:
> 
> vmx.c:3035:d8v0 RDMSR 0x0000019c unimplemented
> d8v0 VIRIDIAN CRASH: 3b c0000096 fffff8061de31651 fffff4088a613720 0
> 
> So handle the MSR and return 0 instead.
> 
> Note that this is done on the generic MSR handler, and PV guest will
> also get 0 back when trying to read the MSR. There doesn't seem to be
> much value in handling the MSR for HVM guests only.
> 
> Fixes: 84e848fd7a1 ('x86/hvm: disallow access to unknown MSRs')
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Acked-by: Jan Beulich <jbeulich@xxxxxxxx>