Re: [Xen-devel] [PATCH 5/5] X86: enable MPX feature to HVM guest

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 19/11/13 10:54, Liu, Jinsong wrote:
> From 9d0248fddf86c96efcb16963f0842927cb5c23c0 Mon Sep 17 00:00:00 2001
> From: Liu Jinsong <jinsong.liu@xxxxxxxxx>
> Date: Tue, 19 Nov 2013 18:48:20 +0800
> Subject: [PATCH 5/5] X86: enable MPX feature to HVM guest
>
> Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
> Reviewed-by: Liu Jinsong <jinsong.liu@xxxxxxxxx>
> ---
>  xen/arch/x86/xstate.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/xen/arch/x86/xstate.c b/xen/arch/x86/xstate.c
> index 1fd43c9..2bc9b60 100644
> --- a/xen/arch/x86/xstate.c
> +++ b/xen/arch/x86/xstate.c
> @@ -373,6 +373,7 @@ int handle_xsetbv(u32 index, u64 new_bv)
>      mask = new_bv & ~curr->arch.xcr0_accum;
>      curr->arch.xcr0 = new_bv;
>      curr->arch.xcr0_accum |= new_bv;
> +    curr->arch.nonlazy_xstate_used = !!(curr->arch.xcr0 & XSTATE_NONLAZY);
>  
>      mask &= curr->fpu_dirtied ? ~XSTATE_FP_SSE : XSTATE_NONLAZY;
>      if ( mask )

This looks like a bug, and unrelated to the patch description?

~Andrew

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