Re: [PATCH 9/9] kvm: vmx: add nested virtualization support for xsaves

[Radim KrÄmÃÅ]

2014-12-04 16:57+0100, Paolo Bonzini:
> From: Wanpeng Li <wanpeng.li@xxxxxxxxxxxxxxx>
> 
> Add vmcs12 support for xsaves.
> 
> Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxxxxxx>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> ---

Reviewed-by: Radim KrÄmÃÅ <rkrcmar@xxxxxxxxxx>

> +	case EXIT_REASON_XSAVES: case EXIT_REASON_XRSTORS:
> +		/*
> +		 * This should never happen, since it is not possible to
> +		 * set XSS to a non-zero value---neither in L1 nor in L2.
> +		 * If if it were, XSS would have to be checked against
> +		 * the XSS exit bitmap in vmcs12.
> +		 */

We could WARN then.

> +		return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
>  	default:
>  		return 1;
>  	}
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