Re: [Xen-devel] [PATCH] x86/HVM: XSETBV intercept needs to check CPL on SVM only

2015-12-01 Thread Tian, Kevin 
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Friday, November 27, 2015 7:02 PM
> 
> VMX doesn't need a software CPL check on the XSETBV intercept, and
> SVM can do that check without resorting to hvm_get_segment_register().
> 
> Clean up what is left of hvm_handle_xsetbv(), namely make it return a
> proper error code.
> 
> Signed-off-by: Jan Beulich 

Acked-by: Kevin Tian 

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Re: [Xen-devel] [PATCH] x86/HVM: XSETBV intercept needs to check CPL on SVM only

2015-11-30 Thread Boris Ostrovsky 

On 11/27/2015 06:01 AM, Jan Beulich wrote:

VMX doesn't need a software CPL check on the XSETBV intercept, and
SVM can do that check without resorting to hvm_get_segment_register().

Clean up what is left of hvm_handle_xsetbv(), namely make it return a
proper error code.

Signed-off-by: Jan Beulich 


Reviewed-by: Boris Ostrovsky 



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Re: [Xen-devel] [PATCH] x86/HVM: XSETBV intercept needs to check CPL on SVM only

2015-11-27 Thread Andrew Cooper 
On 27/11/15 11:01, Jan Beulich wrote:
> VMX doesn't need a software CPL check on the XSETBV intercept, and
> SVM can do that check without resorting to hvm_get_segment_register().
>
> Clean up what is left of hvm_handle_xsetbv(), namely make it return a
> proper error code.
>
> Signed-off-by: Jan Beulich 

Your statement matches the statement in the manual.

Reviewed-by: Andrew Cooper 

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