[PATCH] drm/i915/kvmgt: Sanitize PCI bar emulation

[Zhenyu Wang]

On 2017.08.15 13:20:51 +0800, changbin.du at intel.com wrote:
> From: Changbin Du <changbin.du at intel.com>
> 
> For PCI, 64bit bar consumes two BAR registers, but this doesn't mean
> both of two BAR are valid. Actually the second BAR is regarded as
> reserved in this case. So we shouldn't emulate the second BAR.
> 
> Signed-off-by: Changbin Du <changbin.du at intel.com>
> ---
>  drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
> index 83e88c7..9201db0 100644
> --- a/drivers/gpu/drm/i915/gvt/kvmgt.c
> +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
> @@ -661,7 +661,6 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf,
>  						buf, count);
>  		break;
>  	case VFIO_PCI_BAR0_REGION_INDEX:
> -	case VFIO_PCI_BAR1_REGION_INDEX:
>  		if (is_write) {
>  			uint64_t bar0_start = intel_vgpu_get_bar0_addr(vgpu);
>  
> @@ -674,6 +673,7 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf,
>  						bar0_start + pos, buf, count);
>  		}
>  		break;
> +	case VFIO_PCI_BAR1_REGION_INDEX:
>  	case VFIO_PCI_BAR2_REGION_INDEX:
>  	case VFIO_PCI_BAR3_REGION_INDEX:
>  	case VFIO_PCI_BAR4_REGION_INDEX:

applied this too, thx!

-- 
Open Source Technology Center, Intel ltd.

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