diff mbox series

[v5,05/15] virtio: core: vq reset feature negotation support

Message ID 20220914042055.61939-6-xuanzhuo@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series Support VIRTIO_F_RING_RESET for virtio-net, vhost-net kernel in virtio pci-modern | expand

Commit Message

Xuan Zhuo Sept. 14, 2022, 4:20 a.m. UTC 
From: Kangjie Xu <kangjie.xu@linux.alibaba.com>

A a new command line parameter "queue_reset" is added.

Meanwhile, the vq reset feature is disabled for pre-7.2 machines.

Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 hw/core/machine.c          | 4 +++-
 include/hw/virtio/virtio.h | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/hw/core/machine.c b/hw/core/machine.c
index aa520e74a8..907fa78ff0 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -40,7 +40,9 @@ 
 #include "hw/virtio/virtio-pci.h"
 #include "qom/object_interfaces.h"
 
-GlobalProperty hw_compat_7_1[] = {};
+GlobalProperty hw_compat_7_1[] = {
+    { "virtio-device", "queue_reset", "false" },
+};
 const size_t hw_compat_7_1_len = G_N_ELEMENTS(hw_compat_7_1);
 
 GlobalProperty hw_compat_7_0[] = {
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 085997d8f3..ed3ecbef80 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -295,7 +295,9 @@  typedef struct VirtIORNGConf VirtIORNGConf;
     DEFINE_PROP_BIT64("iommu_platform", _state, _field, \
                       VIRTIO_F_IOMMU_PLATFORM, false), \
     DEFINE_PROP_BIT64("packed", _state, _field, \
-                      VIRTIO_F_RING_PACKED, false)
+                      VIRTIO_F_RING_PACKED, false), \
+    DEFINE_PROP_BIT64("queue_reset", _state, _field, \
+                      VIRTIO_F_RING_RESET, true)
 
 hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
 bool virtio_queue_enabled_legacy(VirtIODevice *vdev, int n);