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Re: [Xen-devel] Fwd: [PATCH RFC 3/4] x86/AMD: support further feature masking MSRs



Newer AMD CPUs also allow masking CPUID leaf 6 ECX and CPUID leaf 7
sub-leaf 0 EAX and EBX.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx <mailto:jbeulich@xxxxxxxx>>

TBD:
- Fam15M0x is documented to not have MSR C0011002 despite CPUID[7,0].EBX != 0 from model 02 onwards, and contrary to what I see on the system I have access to (which is model 02) - Fam12, Fam14, and Fam16 are documented to not have MSR C0011003 despite CPUID[6].ECX != 0

Fam10 too has cpuid[6].ecx != 0 but no MSR C0011003

- Fam11 is documented to not even have MSR C0011004 and C0011005


I am still trying to get some clarity on this;
Shall let you know soon :)

-Aravind.


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