[PATCH 3/3] drm/i915/gvt: show the vGPU status in debugfs

[Zhenyu Wang]

On 2022.11.04 14:56:52 +0000, Zhi Wang wrote:
> After using atomic operation to change the vGPU status, showing the vGPU
> status in the debugfs requires to be updated. This patch adds back the
> function of showing vGPU status in the debugfs.
> 
> Cc: Zhenyu Wang <zhenyuw at linux.intel.com>
> Cc: Kevin Tian <kevin.tian at intel.com>
> Cc: Jason Gunthorpe <jgg at nvidia.com>
> Cc: intel-gvt-dev at lists.freedesktop.org
> Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
> ---
>  drivers/gpu/drm/i915/gvt/debugfs.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/debugfs.c b/drivers/gpu/drm/i915/gvt/debugfs.c
> index bb301bc974a4..a930ba89ac86 100644
> --- a/drivers/gpu/drm/i915/gvt/debugfs.c
> +++ b/drivers/gpu/drm/i915/gvt/debugfs.c
> @@ -151,6 +151,20 @@ DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
>  			vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
>  			"0x%llx\n");
>  
> +static int vgpu_status_get(void *data, u64 *val)
> +{
> +	struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
> +

Need *val = 0;

> +	if (test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
> +		*val |= (1 << INTEL_VGPU_STATUS_ATTACHED);
> +	if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))
> +		*val |= (1 << INTEL_VGPU_STATUS_ACTIVE);
> +
> +	return 0;
> +}
> +
> +DEFINE_SIMPLE_ATTRIBUTE(vgpu_status_fops, vgpu_status_get, NULL, "0x%llx\n");
> +
>  /**
>   * intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
>   * @vgpu: a vGPU
> @@ -166,6 +180,8 @@ void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
>  			    &vgpu_mmio_diff_fops);
>  	debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,
>  			    &vgpu_scan_nonprivbb_fops);
> +	debugfs_create_file("status", 0644, vgpu->debugfs, vgpu,
> +			    &vgpu_status_fops);
>  }
>  
>  /**
> -- 
> 2.25.1
> 

With above change.

Reviewed-by: Zhenyu Wang <zhenyuw at linux.intel.com>
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