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[Qemu-devel] [PATCH v2 0/6] vhost-user: Specify and implement device IOT
From: |
Maxime Coquelin |
Subject: |
[Qemu-devel] [PATCH v2 0/6] vhost-user: Specify and implement device IOTLB support |
Date: |
Fri, 26 May 2017 16:28:52 +0200 |
This series aims at specifying ans implementing the protocol update
required to support device IOTLB with user backends.
In this second non-RFC version, main changes are:
- spec fixes and clarification
- rings information update has been restored back to ring enablement time
- Work around GCC 4.4.7 limitation wrt assignment in unnamed union at
declaration time.
The series can be tested with vhost_iotlb_proto_v2 branch on my gitlab
account[0].
The slave requests channel part is re-used from Marc-André's series submitted
last year[1], with main changes from original version being request/feature
names renaming and addition of the REPLY_ACK feature support.
Regarding IOTLB protocol, one noticeable change is the IOTLB miss request
reply made optionnal (i.e. only if slave requests it by setting the
VHOST_USER_NEED_REPLY flag in the message header). This change provides
more flexibility in the backend implementation of the feature.
The protocol is very close to kernel backends, except that a new
communication channel is introduced to enable the slave to send
requests to the master.
[0]: https://gitlab.com/mcoquelin/dpdk-next-virtio/commits/vhost_iotlb_proto_v2
[1]: https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg00095.html
Marc-André Lureau (2):
vhost-user: add vhost_user to hold the chr
vhost-user: add slave-req-fd support
Maxime Coquelin (4):
vhost: propagate errors in vhost_device_iotlb_miss()
vhost: rework IOTLB messaging
vhost: extend ring information update for IOTLB to all rings
spec/vhost-user spec: Add IOMMU support
docs/specs/vhost-user.txt | 118 ++++++++++++++++++++++++-
hw/virtio/vhost-backend.c | 130 ++++++++++++++++------------
hw/virtio/vhost-user.c | 177 +++++++++++++++++++++++++++++++++++++-
hw/virtio/vhost.c | 27 ++++--
include/hw/virtio/vhost-backend.h | 23 +++--
include/hw/virtio/vhost.h | 2 +-
6 files changed, 397 insertions(+), 80 deletions(-)
--
2.9.4
- [Qemu-devel] [PATCH v2 0/6] vhost-user: Specify and implement device IOTLB support,
Maxime Coquelin <=
[Qemu-devel] [PATCH v2 4/6] vhost-user: add vhost_user to hold the chr, Maxime Coquelin, 2017/05/26
[Qemu-devel] [PATCH v2 5/6] vhost-user: add slave-req-fd support, Maxime Coquelin, 2017/05/26