Re: [Xen-devel] [PATCH v4 02/15] x86/cpu: Fix common cpuid faulting probing for AMD and Hygon

[Pu Wen <puwen@xxxxxxxx>]

On 2019/4/1 16:41, Jan Beulich wrote:
> On 30.03.19 at 11:42, <puwen@xxxxxxxx> wrote:
> > There is no MSR_INTEL_PLATFORM_INFO for AMD and Hygon families. So directly
> > return false in the function probe_cpuid_faulting() if !cpu_has_hypervisor.
> I think it would have been nice if you had mentioned the real
> reason why you want to bypass the MSR accesses. This way it
> sounds as if the change was only cosmetic, and hence could be
> left out.
Okay, how about the new description:
There is no MSR_INTEL_PLATFORM_INFO for AMD and Hygon families. Read
this MSR will stop the Xen initialization process or produce GPF(0).
So directly return false in the function probe_cpuid_faulting() if
!cpu_has_hypervisor.

--
Regards,
Pu Wen

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