Hi All:
This series introduces API for reporing IOVA range. This is a must for
userspace to work correclty:
- for the process that uses vhost-vDPA directly to properly allocate
IOVA
- for VM(qemu), when vIOMMU is not enabled, fail early if GPA is out
of range
- for VM(qemu), when vIOMMU is enabled, determine a valid guest
address width
Please review.
Thanks
Jason Wang (4):
vdpa: introduce config op to get valid iova range
vdpa_sim: implement get_iova_range bus operation
vdpa: get_iova_range() is mandatory for device specific DMA
translation
vhost: vdpa: report iova range
drivers/vdpa/vdpa.c | 4 ++++
drivers/vdpa/vdpa_sim/vdpa_sim.c | 11 +++++++++++
drivers/vhost/vdpa.c | 27 +++++++++++++++++++++++++++
include/linux/vdpa.h | 14 ++++++++++++++
include/uapi/linux/vhost.h | 4 ++++
include/uapi/linux/vhost_types.h | 5 +++++
6 files changed, 65 insertions(+)
--
2.20.1
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