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    SubjectRe: [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@redhat.com>
    >
    > ---
    [...]
    > 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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