diff options
| author | Stefano Garzarella <sgarzare@redhat.com> | 2021-03-15 17:34:37 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-05-03 04:55:52 -0400 |
| commit | 4080fc1067501707b9693b8003feae7d50d14e35 (patch) | |
| tree | bb79c1d6c17f922138afb024b75c642cec336a0b /drivers/vdpa/Kconfig | |
| parent | e8ef6124959a7c4004ef95b1b17cfa9b2ca582bd (diff) | |
vdpa_sim: use iova module to allocate IOVA addresses
The identical mapping used until now created issues when mapping
different virtual pages with the same physical address.
To solve this issue, we can use the iova module, to handle the IOVA
allocation.
For simplicity we use an IOVA allocator with byte granularity.
We add two new functions, vdpasim_map_range() and vdpasim_unmap_range(),
to handle the IOVA allocation and the registration into the IOMMU/IOTLB.
These functions are used by dma_map_ops callbacks.
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-2-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa/Kconfig')
| -rw-r--r-- | drivers/vdpa/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig index a245809c99d0..6e82a0e228c2 100644 --- a/drivers/vdpa/Kconfig +++ b/drivers/vdpa/Kconfig @@ -14,6 +14,7 @@ config VDPA_SIM depends on RUNTIME_TESTING_MENU && HAS_DMA select DMA_OPS select VHOST_RING + select IOMMU_IOVA help Enable this module to support vDPA device simulators. These devices are used for testing, prototyping and development of vDPA. |