Re: [Xen-devel] [PATCH for-4.7] xen/hvm: Fix advertisment of available xstates following c/s c52319642

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 10.06.16 at 20:17, <andrew.cooper3@xxxxxxxxxx> wrote:
> PKU lives in CPUID.7[0].ECX, not EBX.  This causes hardware with BMI1 to
> accidentally advertise PKU in CPUID.0xD[0].EAX.  Any OS which proceeds to
> blindly write this into %xcr0 takes a #GP fault.  (Experimentally, Windows
> Vista 32bit falls into this category.)
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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