Re: [PATCH v11 04/13] vfio/pci: Add VFIO_REGION_TYPE_NESTED region type

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Hi Eric,

On 2020/11/16 19:00, Eric Auger wrote:
Add a new specific DMA_FAULT region aiming to exposed nested mode
translation faults. This region only is exposed if the device
is attached to a nested domain.

The region has a ring buffer that contains the actual fault
records plus a header allowing to handle it (tail/head indices,
max capacity, entry size). At the moment the region is dimensionned
for 512 fault records.

Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>

---
[...]
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index b352e76cfb71..629dfb38d9e7 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -343,6 +343,9 @@ struct vfio_region_info_cap_type {
  /* sub-types for VFIO_REGION_TYPE_GFX */
  #define VFIO_REGION_SUBTYPE_GFX_EDID            (1)
+#define VFIO_REGION_TYPE_NESTED (2)
+#define VFIO_REGION_SUBTYPE_NESTED_DMA_FAULT	(1)
+

The macro *define VFIO_REGION_TYPE_NESTED    (2)* is in conflict with

*#define VFIO_REGION_TYPE_CCW    (2)*.


Thanks,

Kunkun Jiang.




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