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| author | Tiwei Bie <tiwei.bie@intel.com> | 2018-05-10 23:41:26 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-05-23 20:34:52 +0300 |
| commit | 12fe939f1df9482d6134f9ec5ae39ddacc3df426 (patch) | |
| tree | 0f77676a0eba64be8205e2bead98d8c42ac2138d /images | |
| parent | 64d1a58f3ffe37ee28c0bc0c34bece8ebd1f6356 (diff) | |
VIRTIO_F_IO_BARRIER: use I/O barriers in driver
There will be hardware virtio devices in the future, which
require drivers to use the barriers suitable for I/O devices,
compared with software virtio devices which just require
drivers to use the barriers suitable for CPU cores.
To fix the ordering issue for hardware virtio devices, add
a new feature: VIRTIO_F_IO_BARRIER. When negotiated, driver
will use the barriers suitable for I/O devices.
Fixes: https://github.com/oasis-tcs/virtio-spec/issues/10
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'images')
0 files changed, 0 insertions, 0 deletions