diff options
| author | Si-Wei Liu <[email protected]> | 2023-10-21 02:25:19 -0700 |
|---|---|---|
| committer | Michael S. Tsirkin <[email protected]> | 2023-11-01 09:20:00 -0400 |
| commit | 86f6c224c97911b4392cb7b402e6a4ed323a449e (patch) | |
| tree | 8e390d759719a35753e486accf0480511e08eb80 /drivers/fpga/altera-fpga2sdram.c | |
| parent | 2eacf4b5e3ebe771f0fca0c8913c5a10a1953b72 (diff) | |
vdpa_sim: implement .reset_map support
In order to reduce excessive memory mapping cost in live migration and
VM reboot, it is desirable to decouple the vhost-vdpa IOTLB abstraction
from the virtio device life cycle, i.e. mappings can be kept intact
across virtio device reset. Leverage the .reset_map callback, which is
meant to destroy the iotlb on the given ASID and recreate the 1:1
passthrough/identity mapping. To be consistent, the mapping on device
creation is initiailized to passthrough/identity with PA 1:1 mapped as
IOVA. With this the device .reset op doesn't have to maintain and clean
up memory mappings by itself.
Additionally, implement .compat_reset to cater for older userspace,
which may wish to see mapping to be cleared during reset.
Signed-off-by: Si-Wei Liu <[email protected]>
Tested-by: Stefano Garzarella <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Tested-by: Lei Yang <[email protected]>
Diffstat (limited to 'drivers/fpga/altera-fpga2sdram.c')
0 files changed, 0 insertions, 0 deletions