[PATCH v6] drm/i915/gvt: save RING_HEAD into vreg when vgpu switched out

[Zhenyu Wang]

On 2019.06.03 10:55:53 +0800, Xiaolin Zhang wrote:
> Save RING_HEAD into vgpu reg when vgpu switched out and report
> it's value back to guest.
> 
> v6: addressed comment for ring head wrap count support. (Zhenyu)
> v5: ring head wrap count support.
> v4: updated HEAD/TAIL with guest value, not host value. (Yan Zhao)
> v3: save RING HEAD/TAIL vgpu reg in save_ring_hw_state. (Zhenyu Wang)
> v2: save RING_TAIL as well during vgpu mmio switch to meet ring_is_idle
> condition. (Fred Gao)
> v1: based on input from Weinan. (Weinan Li)
> 
> [zhenyuw: Include this fix for possible future guest kernel that
> would utilize RING_HEAD for hangcheck.]
> 
> Reviewed-by: Zhenyu Wang <zhenyuw at linux.intel.com>
> Signed-off-by: Xiaolin Zhang <xiaolin.zhang at intel.com>
> Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
> ---

Applied this, thanks!

-- 
Open Source Technology Center, Intel ltd.

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