[PATCH 1/2] drm/i915/gvt: Add read handler for GDRST register

[Zhenyu Wang]

On 2017.05.24 12:02:24 +0800, fred gao wrote:
> emulating the GDRST read behavior to ack the guest
> reset request.
> 
> v2:
> - split the original patch into two:
>   GDRST read handler and virtual gpu reset. (Zhengyu)
> v3:
> - emulate the GDRST read right after write. (Zhengyu)
> 
> Cc: Zhenyu Wang <zhenyuw at linux.intel.com>
> Cc: Zhang Yulei <yulei.zhang at intel.com>
> Signed-off-by: fred gao <fred.gao at intel.com>
> ---

I have to fix the title for this as "drm/i915/gvt: Fix GDRST vreg state after reset",
instead of current as no more handler added.

Pushed, thx!

>  drivers/gpu/drm/i915/gvt/handlers.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
> index 973396b..d826f40 100644
> --- a/drivers/gpu/drm/i915/gvt/handlers.c
> +++ b/drivers/gpu/drm/i915/gvt/handlers.c
> @@ -297,6 +297,9 @@ static int gdrst_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
>  
>  	intel_gvt_reset_vgpu_locked(vgpu, false, engine_mask);
>  
> +	/* sw will wait for the device to ack the reset request */
> +	 vgpu_vreg(vgpu, offset) = 0;
> +
>  	return 0;
>  }
>  
> -- 
> 2.7.4
> 
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> intel-gvt-dev at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gvt-dev

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