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qemu-kvm/SOURCES/kvm-vdpa-export-vhost_vdpa_...

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From 636eb63cbf23b31fc9880528490ac4bef680305b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
Date: Wed, 25 Jan 2023 08:47:34 +0100
Subject: [PATCH 4/7] vdpa: export vhost_vdpa_set_vring_ready
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Eugenio Pérez <eperezma@redhat.com>
RH-MergeRequest: 199: CVQ migration support
RH-Jira: RHEL-923
RH-Acked-by: Jason Wang <jasowang@redhat.com>
RH-Acked-by: Cindy Lu <lulu@redhat.com>
RH-Commit: [4/7] 8d1fecec7a993b8b68e268e8783c200c158f5ee0 (eperezmartin/qemu-kvm)
The vhost-vdpa net backend needs to enable vrings in a different order
than default, so export it.
No functional change intended except for tracing, that now includes the
(virtio) index being enabled and the return value of the ioctl.
Still ignoring return value of this function if called from
vhost_vdpa_dev_start, as reorganize calling code around it is out of
the scope of this series.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
hw/virtio/trace-events | 2 +-
hw/virtio/vhost-vdpa.c | 25 +++++++++++++------------
include/hw/virtio/vhost-vdpa.h | 1 +
3 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 300dec8d3e..85b43cd8fe 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -48,7 +48,7 @@ vhost_vdpa_set_features(void *dev, uint64_t features) "dev: %p features: 0x%"PRI
vhost_vdpa_get_device_id(void *dev, uint32_t device_id) "dev: %p device_id %"PRIu32
vhost_vdpa_reset_device(void *dev, uint8_t status) "dev: %p status: 0x%"PRIx8
vhost_vdpa_get_vq_index(void *dev, int idx, int vq_idx) "dev: %p idx: %d vq idx: %d"
-vhost_vdpa_set_vring_ready(void *dev) "dev: %p"
+vhost_vdpa_set_vring_ready(void *dev, unsigned i, int r) "dev: %p, idx: %u, r: %d"
vhost_vdpa_dump_config(void *dev, const char *line) "dev: %p %s"
vhost_vdpa_set_config(void *dev, uint32_t offset, uint32_t size, uint32_t flags) "dev: %p offset: %"PRIu32" size: %"PRIu32" flags: 0x%"PRIx32
vhost_vdpa_get_config(void *dev, void *config, uint32_t config_len) "dev: %p config: %p config_len: %"PRIu32
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index c04f14420d..e4d0101327 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -733,18 +733,17 @@ static int vhost_vdpa_get_vq_index(struct vhost_dev *dev, int idx)
return idx;
}
-static int vhost_vdpa_set_vring_ready(struct vhost_dev *dev)
+int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx)
{
- int i;
- trace_vhost_vdpa_set_vring_ready(dev);
- for (i = 0; i < dev->nvqs; ++i) {
- struct vhost_vring_state state = {
- .index = dev->vq_index + i,
- .num = 1,
- };
- vhost_vdpa_call(dev, VHOST_VDPA_SET_VRING_ENABLE, &state);
- }
- return 0;
+ struct vhost_dev *dev = v->dev;
+ struct vhost_vring_state state = {
+ .index = idx,
+ .num = 1,
+ };
+ int r = vhost_vdpa_call(dev, VHOST_VDPA_SET_VRING_ENABLE, &state);
+
+ trace_vhost_vdpa_set_vring_ready(dev, idx, r);
+ return r;
}
static int vhost_vdpa_set_config_call(struct vhost_dev *dev,
@@ -1155,7 +1154,9 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started)
if (unlikely(!ok)) {
return -1;
}
- vhost_vdpa_set_vring_ready(dev);
+ for (int i = 0; i < dev->nvqs; ++i) {
+ vhost_vdpa_set_vring_ready(v, dev->vq_index + i);
+ }
} else {
vhost_vdpa_suspend(dev);
vhost_vdpa_svqs_stop(dev);
diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index c278a2a8de..540642d304 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -55,6 +55,7 @@ typedef struct vhost_vdpa {
} VhostVDPA;
int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
+int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx);
int vhost_vdpa_dma_map(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
hwaddr size, void *vaddr, bool readonly);
--
2.39.3