From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
Jason Wang <jasowang@redhat.com>
Subject: [PULL v2 39/44] virtio-net: vhost control virtqueue support
Date: Wed, 20 Oct 2021 06:21:00 -0400 [thread overview]
Message-ID: <20211020101844.988480-40-mst@redhat.com> (raw)
In-Reply-To: <20211020101844.988480-1-mst@redhat.com>
From: Jason Wang <jasowang@redhat.com>
This patch implements the control virtqueue support for vhost. This
requires virtio-net to figure out the datapath queue pairs and control
virtqueue via is_datapath and pass the number of those two types
of virtqueues to vhost_net_start()/vhost_net_stop().
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20211020045600.16082-10-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
include/hw/virtio/virtio-net.h | 1 +
hw/net/vhost_net.c | 2 +-
hw/net/virtio-net.c | 23 +++++++++++++++++++----
3 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index 2903b79a92..eb87032627 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -196,6 +196,7 @@ struct VirtIONet {
int multiqueue;
uint16_t max_queue_pairs;
uint16_t curr_queue_pairs;
+ uint16_t max_ncs;
size_t config_size;
char *netclient_name;
char *netclient_type;
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 3aabab06ea..0d888f29a6 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -326,7 +326,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
VirtIONet *n = VIRTIO_NET(dev);
int nvhosts = data_queue_pairs + cvq;
struct vhost_net *net;
- int r, e, i, last_index = data_qps * 2;
+ int r, e, i, last_index = data_queue_pairs * 2;
NetClientState *peer;
if (!cvq) {
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 7594f7ea92..f2014d5ea0 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -244,6 +244,7 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
VirtIODevice *vdev = VIRTIO_DEVICE(n);
NetClientState *nc = qemu_get_queue(n->nic);
int queue_pairs = n->multiqueue ? n->max_queue_pairs : 1;
+ int cvq = n->max_ncs - n->max_queue_pairs;
if (!get_vhost_net(nc->peer)) {
return;
@@ -285,14 +286,14 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
}
n->vhost_started = 1;
- r = vhost_net_start(vdev, n->nic->ncs, queue_pairs, 0);
+ r = vhost_net_start(vdev, n->nic->ncs, queue_pairs, cvq);
if (r < 0) {
error_report("unable to start vhost net: %d: "
"falling back on userspace virtio", -r);
n->vhost_started = 0;
}
} else {
- vhost_net_stop(vdev, n->nic->ncs, queue_pairs, 0);
+ vhost_net_stop(vdev, n->nic->ncs, queue_pairs, cvq);
n->vhost_started = 0;
}
}
@@ -3411,9 +3412,23 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
return;
}
- n->max_queue_pairs = MAX(n->nic_conf.peers.queues, 1);
+ n->max_ncs = MAX(n->nic_conf.peers.queues, 1);
+
+ /*
+ * Figure out the datapath queue pairs since the backend could
+ * provide control queue via peers as well.
+ */
+ if (n->nic_conf.peers.queues) {
+ for (i = 0; i < n->max_ncs; i++) {
+ if (n->nic_conf.peers.ncs[i]->is_datapath) {
+ ++n->max_queue_pairs;
+ }
+ }
+ }
+ n->max_queue_pairs = MAX(n->max_queue_pairs, 1);
+
if (n->max_queue_pairs * 2 + 1 > VIRTIO_QUEUE_MAX) {
- error_setg(errp, "Invalid number of queue_pairs (= %" PRIu32 "), "
+ error_setg(errp, "Invalid number of queue pairs (= %" PRIu32 "), "
"must be a positive integer less than %d.",
n->max_queue_pairs, (VIRTIO_QUEUE_MAX - 1) / 2);
virtio_cleanup(vdev);
--
MST
next prev parent reply other threads:[~2021-10-20 10:48 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-20 10:19 [PULL v2 00/44] pc,pci,virtio: features, fixes, tests Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 01/44] tests: acpi: dump table with failed checksum Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 02/44] tests: qtest: add qtest_has_accel() to check if tested binary supports accelerator Michael S. Tsirkin
2021-10-22 13:04 ` Jason Andryuk
2021-10-26 13:41 ` Igor Mammedov
2021-10-20 10:19 ` [PULL v2 03/44] tests: acpi: whitelist expected tables for acpi/q35/xapic testcase Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 04/44] tests: acpi: q35: test for x2APIC entries in SRAT Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 05/44] tests: acpi: update expected tables blobs Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 06/44] tests: acpi: whitelist new expected table tests/data/acpi/q35/DMAR.dmar Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 07/44] tests: acpi: add testcase for intel_iommu (DMAR table) Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 08/44] tests: acpi: add expected blob for DMAR table Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 09/44] tests: acpi: whitelist expected blobs for new acpi/q35/ivrs testcase Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 10/44] tests: acpi: add testcase for amd-iommu (IVRS table) Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 11/44] tests: acpi: update expected blobs Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 12/44] tests: acpi: arm/virt: drop redundant test_acpi_one() in test_acpi_virt_tcg() Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 13/44] tests: arm-cpu-features: use qtest_has_kvm() API Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 14/44] tests: migration-test: use qtest_has_accel() API Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 15/44] tests: bios-tables-test: use qtest_has_accel() API to register TCG only tests Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 16/44] vdpa: Skip protected ram IOMMU mappings Michael S. Tsirkin
2021-10-20 10:19 ` [PULL v2 17/44] vdpa: Add vhost_vdpa_section_end Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 18/44] vdpa: Check for iova range at mappings changes Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 19/44] virtio-iommu: Remove the non transitional name Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 20/44] virtio-iommu: Drop base_name and change generic_name Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 21/44] libvhost-user: fix VHOST_USER_REM_MEM_REG skipping mmap_addr Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 22/44] vhost-user-rng: Add vhost-user-rng implementation Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 23/44] vhost-user-rng-pci: Add vhost-user-rng-pci implementation Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 24/44] docs: Add documentation for vhost based RNG implementation Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 25/44] vhost-user: fix duplicated notifier MR init Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 26/44] failover: fix a regression introduced by JSON'ification of -device Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 27/44] vhost-user-blk-test: pass vhost-user socket fds to QSD Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 28/44] qdev/qbus: remove failover specific code Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 29/44] rebuild-expected-aml.sh: allow partial target list Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 30/44] bios-tables-test: don't disassemble empty files Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 31/44] vhost-vdpa: open device fd in net_init_vhost_vdpa() Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 32/44] vhost-vdpa: classify one time request Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 33/44] vhost-vdpa: prepare for the multiqueue support Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 34/44] vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState * Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 35/44] net: introduce control client Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 36/44] vhost-net: control virtqueue support Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 37/44] virtio-net: use "queue_pairs" instead of "queues" when possible Michael S. Tsirkin
2021-10-20 10:20 ` [PULL v2 38/44] vhost: record the last virtqueue index for the virtio device Michael S. Tsirkin
2021-10-20 10:21 ` Michael S. Tsirkin [this message]
2021-10-20 10:21 ` [PULL v2 40/44] vhost-vdpa: multiqueue support Michael S. Tsirkin
2021-10-20 10:21 ` [PULL v2 41/44] pci: fix PCI resource reserve capability on BE Michael S. Tsirkin
2021-10-20 10:21 ` [PULL v2 42/44] tests/acpi/bios-tables-test: add and allow changes to a new q35 DSDT table blob Michael S. Tsirkin
2021-10-20 10:21 ` [PULL v2 43/44] tests/acpi/pcihp: add unit tests for hotplug on multifunction bridges for q35 Michael S. Tsirkin
2021-10-20 10:21 ` [PULL v2 44/44] tests/acpi/bios-tables-test: update DSDT blob for multifunction bridge test Michael S. Tsirkin
2021-10-20 17:56 ` [PULL v2 00/44] pc,pci,virtio: features, fixes, tests Richard Henderson
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