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vfio: Create device specific region info helper

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Given a device specific region type and sub-type, find it.  Also
cleanup return point on error in vfio_get_region_info() so that we
always return 0 with a valid pointer or -errno and NULL.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Alex Williamson 2016-05-26 09:43:20 -06:00
parent b53b0f696b
commit e61a424f05
3 changed files with 40 additions and 2 deletions
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2
include/hw/vfio/vfio-common.h
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@ -154,5 +154,7 @@ extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces;
#ifdef CONFIG_LINUX
int vfio_get_region_info(VFIODevice *vbasedev, int index,
struct vfio_region_info **info);
int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type,
uint32_t subtype, struct vfio_region_info **info);
#endif
#endif /* !HW_VFIO_VFIO_COMMON_H */