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[Qemu-devel] [PATCH V2 03/11] virito: introduce bus specific queue limit
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PATCH V2 03/11] virito: introduce bus specific queue limit |
Date: |
Thu, 26 Feb 2015 15:04:38 +0800 |
This patch introduces a bus specific queue limitation. It will be
useful for increasing the limit for one of the bus without disturbing
other buses.
Cc: Anthony Liguori <address@hidden>
Cc: Michael S. Tsirkin <address@hidden>
Cc: Alexander Graf <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: Cornelia Huck <address@hidden>
Cc: Christian Borntraeger <address@hidden>
Cc: Paolo Bonzini <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
---
hw/net/virtio-net.c | 4 ++--
hw/s390x/s390-virtio-bus.c | 1 +
hw/s390x/virtio-ccw.c | 1 +
hw/scsi/virtio-scsi.c | 4 ++--
hw/virtio/virtio-mmio.c | 1 +
hw/virtio/virtio-pci.c | 1 +
hw/virtio/virtio.c | 52 +++++++++++++++++++++++++++++++-----------
include/hw/virtio/virtio-bus.h | 1 +
include/hw/virtio/virtio.h | 1 +
9 files changed, 49 insertions(+), 17 deletions(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index c8d2cca..260345c 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1585,10 +1585,10 @@ static void virtio_net_device_realize(DeviceState *dev,
Error **errp)
virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
n->max_queues = MAX(n->nic_conf.peers.queues, 1);
- if (n->max_queues * 2 + 1 > VIRTIO_PCI_QUEUE_MAX) {
+ if (n->max_queues * 2 + 1 > virtio_get_queue_max(vdev)) {
error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
"must be a postive integer less than %d.",
- n->max_queues, (VIRTIO_PCI_QUEUE_MAX - 1) / 2);
+ n->max_queues, (virtio_get_queue_max(vdev) - 1) / 2);
virtio_cleanup(vdev);
return;
}
diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c
index 39dc201..d48590a 100644
--- a/hw/s390x/s390-virtio-bus.c
+++ b/hw/s390x/s390-virtio-bus.c
@@ -707,6 +707,7 @@ static void virtio_s390_bus_class_init(ObjectClass *klass,
void *data)
bus_class->max_dev = 1;
k->notify = virtio_s390_notify;
k->get_features = virtio_s390_get_features;
+ k->queue_max = VIRTIO_PCI_QUEUE_MAX;
}
static const TypeInfo virtio_s390_bus_info = {
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index ea236c9..4874622 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -1695,6 +1695,7 @@ static void virtio_ccw_bus_class_init(ObjectClass *klass,
void *data)
k->load_queue = virtio_ccw_load_queue;
k->save_config = virtio_ccw_save_config;
k->load_config = virtio_ccw_load_config;
+ k->queue_max = VIRTIO_PCI_QUEUE_MAX;
}
static const TypeInfo virtio_ccw_bus_info = {
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 9e2c718..91d49f1 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -822,10 +822,10 @@ void virtio_scsi_common_realize(DeviceState *dev, Error
**errp,
sizeof(VirtIOSCSIConfig));
if (s->conf.num_queues == 0 ||
- s->conf.num_queues > VIRTIO_PCI_QUEUE_MAX - 2) {
+ s->conf.num_queues > virtio_get_queue_max(vdev) - 2) {
error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
"must be a positive integer less than %d.",
- s->conf.num_queues, VIRTIO_PCI_QUEUE_MAX - 2);
+ s->conf.num_queues, virtio_get_queue_max(vdev) - 2);
virtio_cleanup(vdev);
return;
}
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 2450c13..ad03218 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -403,6 +403,7 @@ static void virtio_mmio_bus_class_init(ObjectClass *klass,
void *data)
k->device_plugged = virtio_mmio_device_plugged;
k->has_variable_vring_alignment = true;
bus_class->max_dev = 1;
+ k->queue_max = VIRTIO_PCI_QUEUE_MAX;
}
static const TypeInfo virtio_mmio_bus_info = {
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index dde1d73..7fa8141 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1559,6 +1559,7 @@ static void virtio_pci_bus_class_init(ObjectClass *klass,
void *data)
k->vmstate_change = virtio_pci_vmstate_change;
k->device_plugged = virtio_pci_device_plugged;
k->device_unplugged = virtio_pci_device_unplugged;
+ k->queue_max = VIRTIO_PCI_QUEUE_MAX;
}
static const TypeInfo virtio_pci_bus_info = {
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index ffc22e8..5a806b5 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -541,6 +541,14 @@ void virtio_update_irq(VirtIODevice *vdev)
virtio_notify_vector(vdev, VIRTIO_NO_VECTOR);
}
+int virtio_get_queue_max(VirtIODevice *vdev)
+{
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ return k->queue_max;
+}
+
void virtio_set_status(VirtIODevice *vdev, uint8_t val)
{
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
@@ -576,6 +584,8 @@ static enum virtio_device_endian
virtio_current_cpu_endian(void)
void virtio_reset(void *opaque)
{
VirtIODevice *vdev = opaque;
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *bk = VIRTIO_BUS_GET_CLASS(qbus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
int i;
@@ -599,7 +609,7 @@ void virtio_reset(void *opaque)
vdev->config_vector = VIRTIO_NO_VECTOR;
virtio_notify_vector(vdev, vdev->config_vector);
- for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ for(i = 0; i < bk->queue_max; i++) {
vdev->vq[i].vring.desc = 0;
vdev->vq[i].vring.avail = 0;
vdev->vq[i].vring.used = 0;
@@ -738,7 +748,10 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n)
int virtio_queue_get_id(VirtQueue *vq)
{
VirtIODevice *vdev = vq->vdev;
- assert(vq >= &vdev->vq[0] && vq < &vdev->vq[VIRTIO_PCI_QUEUE_MAX]);
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ assert(vq >= &vdev->vq[0] && vq < &vdev->vq[k->queue_max]);
return vq - &vdev->vq[0];
}
@@ -777,27 +790,35 @@ void virtio_queue_notify(VirtIODevice *vdev, int n)
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n)
{
- return n < VIRTIO_PCI_QUEUE_MAX ? vdev->vq[n].vector :
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ return n < k->queue_max ? vdev->vq[n].vector :
VIRTIO_NO_VECTOR;
}
void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector)
{
- if (n < VIRTIO_PCI_QUEUE_MAX)
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ if (n < k->queue_max)
vdev->vq[n].vector = vector;
}
VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
void (*handle_output)(VirtIODevice *, VirtQueue *))
{
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
int i;
- for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ for (i = 0; i < k->queue_max; i++) {
if (vdev->vq[i].vring.num == 0)
break;
}
- if (i == VIRTIO_PCI_QUEUE_MAX || queue_size > VIRTQUEUE_MAX_SIZE)
+ if (i == k->queue_max || queue_size > VIRTQUEUE_MAX_SIZE)
abort();
vdev->vq[i].vring.num = queue_size;
@@ -809,7 +830,10 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int
queue_size,
void virtio_del_queue(VirtIODevice *vdev, int n)
{
- if (n < 0 || n >= VIRTIO_PCI_QUEUE_MAX) {
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ if (n < 0 || n >= k->queue_max) {
abort();
}
@@ -932,14 +956,14 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
qemu_put_be32(f, vdev->config_len);
qemu_put_buffer(f, vdev->config, vdev->config_len);
- for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ for (i = 0; i < k->queue_max; i++) {
if (vdev->vq[i].vring.num == 0)
break;
}
qemu_put_be32(f, i);
- for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ for (i = 0; i < k->queue_max; i++) {
if (vdev->vq[i].vring.num == 0)
break;
@@ -1004,7 +1028,7 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int
version_id)
qemu_get_8s(f, &vdev->status);
qemu_get_8s(f, &vdev->isr);
qemu_get_be16s(f, &vdev->queue_sel);
- if (vdev->queue_sel >= VIRTIO_PCI_QUEUE_MAX) {
+ if (vdev->queue_sel >= k->queue_max) {
return -1;
}
qemu_get_be32s(f, &features);
@@ -1031,7 +1055,7 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int
version_id)
num = qemu_get_be32(f);
- if (num > VIRTIO_PCI_QUEUE_MAX) {
+ if (num > k->queue_max) {
error_report("Invalid number of PCI queues: 0x%x", num);
return -1;
}
@@ -1141,15 +1165,17 @@ void virtio_instance_init_common(Object *proxy_obj,
void *data,
void virtio_init(VirtIODevice *vdev, const char *name,
uint16_t device_id, size_t config_size)
{
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
int i;
vdev->device_id = device_id;
vdev->status = 0;
vdev->isr = 0;
vdev->queue_sel = 0;
vdev->config_vector = VIRTIO_NO_VECTOR;
- vdev->vq = g_malloc0(sizeof(VirtQueue) * VIRTIO_PCI_QUEUE_MAX);
+ vdev->vq = g_malloc0(sizeof(VirtQueue) * k->queue_max);
vdev->vm_running = runstate_is_running();
- for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ for (i = 0; i < k->queue_max; i++) {
vdev->vq[i].vector = VIRTIO_NO_VECTOR;
vdev->vq[i].vdev = vdev;
vdev->vq[i].queue_index = i;
diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h
index 0756545..979835c 100644
--- a/include/hw/virtio/virtio-bus.h
+++ b/include/hw/virtio/virtio-bus.h
@@ -68,6 +68,7 @@ typedef struct VirtioBusClass {
* Note that changing this will break migration for this transport.
*/
bool has_variable_vring_alignment;
+ uint16_t queue_max;
} VirtioBusClass;
struct VirtioBusState {
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index f24997d..9fe0d92 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -223,6 +223,7 @@ void virtio_queue_notify(VirtIODevice *vdev, int n);
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
void virtio_set_status(VirtIODevice *vdev, uint8_t val);
+int virtio_get_queue_max(VirtIODevice *vdev);
void virtio_reset(void *opaque);
void virtio_update_irq(VirtIODevice *vdev);
int virtio_set_features(VirtIODevice *vdev, uint32_t val);
--
1.9.1
[Qemu-devel] [PATCH V2 05/11] virtio-serial-bus: switch to bus specific queue limit, Jason Wang, 2015/02/26
[Qemu-devel] [PATCH V2 04/11] virtio-ccw: introduce ccw specific queue limit, Jason Wang, 2015/02/26