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[PULL 24/51] virtio-pci: add support for configure interrupt
From: |
Michael S. Tsirkin |
Subject: |
[PULL 24/51] virtio-pci: add support for configure interrupt |
Date: |
Thu, 5 Jan 2023 04:15:32 -0500 |
From: Cindy Lu <lulu@redhat.com>
Add process to handle the configure interrupt, The function's
logic is the same with vq interrupt.Add extra process to check
the configure interrupt
Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-11-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
include/hw/virtio/virtio-pci.h | 4 +-
hw/virtio/virtio-pci.c | 118 +++++++++++++++++++++++++++------
2 files changed, 102 insertions(+), 20 deletions(-)
diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h
index 24fba1604b..ab2051b64b 100644
--- a/include/hw/virtio/virtio-pci.h
+++ b/include/hw/virtio/virtio-pci.h
@@ -261,5 +261,7 @@ void virtio_pci_types_register(const
VirtioPCIDeviceTypeInfo *t);
* @fixed_queues.
*/
unsigned virtio_pci_optimal_num_queues(unsigned fixed_queues);
-
+void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue
*vq,
+ int n, bool assign,
+ bool with_irqfd);
#endif
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index d7e29b1cdc..7bc60fcf94 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -836,7 +836,8 @@ static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy,
int queue_no,
VirtQueue *vq;
if (queue_no == VIRTIO_CONFIG_IRQ_IDX) {
- return -1;
+ *n = virtio_config_get_guest_notifier(vdev);
+ *vector = vdev->config_vector;
} else {
if (!virtio_queue_get_num(vdev, queue_no)) {
return -1;
@@ -896,7 +897,7 @@ undo:
}
return ret;
}
-static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
+static int kvm_virtio_pci_vector_vq_use(VirtIOPCIProxy *proxy, int nvqs)
{
int queue_no;
int ret = 0;
@@ -911,6 +912,10 @@ static int kvm_virtio_pci_vector_use(VirtIOPCIProxy
*proxy, int nvqs)
return ret;
}
+static int kvm_virtio_pci_vector_config_use(VirtIOPCIProxy *proxy)
+{
+ return kvm_virtio_pci_vector_use_one(proxy, VIRTIO_CONFIG_IRQ_IDX);
+}
static void kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy,
int queue_no)
@@ -935,7 +940,7 @@ static void
kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy,
kvm_virtio_pci_vq_vector_release(proxy, vector);
}
-static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
+static void kvm_virtio_pci_vector_vq_release(VirtIOPCIProxy *proxy, int nvqs)
{
int queue_no;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
@@ -948,6 +953,11 @@ static void kvm_virtio_pci_vector_release(VirtIOPCIProxy
*proxy, int nvqs)
}
}
+static void kvm_virtio_pci_vector_config_release(VirtIOPCIProxy *proxy)
+{
+ kvm_virtio_pci_vector_release_one(proxy, VIRTIO_CONFIG_IRQ_IDX);
+}
+
static int virtio_pci_one_vector_unmask(VirtIOPCIProxy *proxy,
unsigned int queue_no,
unsigned int vector,
@@ -1029,9 +1039,19 @@ static int virtio_pci_vector_unmask(PCIDevice *dev,
unsigned vector,
}
vq = virtio_vector_next_queue(vq);
}
-
+ /* unmask config intr */
+ if (vector == vdev->config_vector) {
+ n = virtio_config_get_guest_notifier(vdev);
+ ret = virtio_pci_one_vector_unmask(proxy, VIRTIO_CONFIG_IRQ_IDX,
vector,
+ msg, n);
+ if (ret < 0) {
+ goto undo_config;
+ }
+ }
return 0;
-
+undo_config:
+ n = virtio_config_get_guest_notifier(vdev);
+ virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n);
undo:
vq = virtio_vector_first_queue(vdev, vector);
while (vq && unmasked >= 0) {
@@ -1065,6 +1085,11 @@ static void virtio_pci_vector_mask(PCIDevice *dev,
unsigned vector)
}
vq = virtio_vector_next_queue(vq);
}
+
+ if (vector == vdev->config_vector) {
+ n = virtio_config_get_guest_notifier(vdev);
+ virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n);
+ }
}
static void virtio_pci_vector_poll(PCIDevice *dev,
@@ -1096,6 +1121,34 @@ static void virtio_pci_vector_poll(PCIDevice *dev,
msix_set_pending(dev, vector);
}
}
+ /* poll the config intr */
+ ret = virtio_pci_get_notifier(proxy, VIRTIO_CONFIG_IRQ_IDX, ¬ifier,
+ &vector);
+ if (ret < 0) {
+ return;
+ }
+ if (vector < vector_start || vector >= vector_end ||
+ !msix_is_masked(dev, vector)) {
+ return;
+ }
+ if (k->guest_notifier_pending) {
+ if (k->guest_notifier_pending(vdev, VIRTIO_CONFIG_IRQ_IDX)) {
+ msix_set_pending(dev, vector);
+ }
+ } else if (event_notifier_test_and_clear(notifier)) {
+ msix_set_pending(dev, vector);
+ }
+}
+
+void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue
*vq,
+ int n, bool assign,
+ bool with_irqfd)
+{
+ if (n == VIRTIO_CONFIG_IRQ_IDX) {
+ virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
+ } else {
+ virtio_queue_set_guest_notifier_fd_handler(vq, assign, with_irqfd);
+ }
}
static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
@@ -1104,17 +1157,25 @@ static int virtio_pci_set_guest_notifier(DeviceState
*d, int n, bool assign,
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
- VirtQueue *vq = virtio_get_queue(vdev, n);
- EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
+ VirtQueue *vq = NULL;
+ EventNotifier *notifier = NULL;
+
+ if (n == VIRTIO_CONFIG_IRQ_IDX) {
+ notifier = virtio_config_get_guest_notifier(vdev);
+ } else {
+ vq = virtio_get_queue(vdev, n);
+ notifier = virtio_queue_get_guest_notifier(vq);
+ }
if (assign) {
int r = event_notifier_init(notifier, 0);
if (r < 0) {
return r;
}
- virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
+ virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, true,
with_irqfd);
} else {
- virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
+ virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, false,
+ with_irqfd);
event_notifier_cleanup(notifier);
}
@@ -1157,10 +1218,13 @@ static int virtio_pci_set_guest_notifiers(DeviceState
*d, int nvqs, bool assign)
proxy->nvqs_with_notifiers = nvqs;
/* Must unset vector notifier while guest notifier is still assigned */
- if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
+ if ((proxy->vector_irqfd ||
+ (vdev->use_guest_notifier_mask && k->guest_notifier_mask)) &&
+ !assign) {
msix_unset_vector_notifiers(&proxy->pci_dev);
if (proxy->vector_irqfd) {
- kvm_virtio_pci_vector_release(proxy, nvqs);
+ kvm_virtio_pci_vector_vq_release(proxy, nvqs);
+ kvm_virtio_pci_vector_config_release(proxy);
g_free(proxy->vector_irqfd);
proxy->vector_irqfd = NULL;
}
@@ -1176,20 +1240,30 @@ static int virtio_pci_set_guest_notifiers(DeviceState
*d, int nvqs, bool assign)
goto assign_error;
}
}
-
+ r = virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, assign,
+ with_irqfd);
+ if (r < 0) {
+ goto config_assign_error;
+ }
/* Must set vector notifier after guest notifier has been assigned */
- if ((with_irqfd || k->guest_notifier_mask) && assign) {
+ if ((with_irqfd ||
+ (vdev->use_guest_notifier_mask && k->guest_notifier_mask)) &&
+ assign) {
if (with_irqfd) {
proxy->vector_irqfd =
g_malloc0(sizeof(*proxy->vector_irqfd) *
msix_nr_vectors_allocated(&proxy->pci_dev));
- r = kvm_virtio_pci_vector_use(proxy, nvqs);
+ r = kvm_virtio_pci_vector_vq_use(proxy, nvqs);
if (r < 0) {
- goto assign_error;
+ goto config_assign_error;
+ }
+ r = kvm_virtio_pci_vector_config_use(proxy);
+ if (r < 0) {
+ goto config_error;
}
}
- r = msix_set_vector_notifiers(&proxy->pci_dev,
- virtio_pci_vector_unmask,
+
+ r = msix_set_vector_notifiers(&proxy->pci_dev,
virtio_pci_vector_unmask,
virtio_pci_vector_mask,
virtio_pci_vector_poll);
if (r < 0) {
@@ -1202,9 +1276,15 @@ static int virtio_pci_set_guest_notifiers(DeviceState
*d, int nvqs, bool assign)
notifiers_error:
if (with_irqfd) {
assert(assign);
- kvm_virtio_pci_vector_release(proxy, nvqs);
+ kvm_virtio_pci_vector_vq_release(proxy, nvqs);
}
-
+config_error:
+ if (with_irqfd) {
+ kvm_virtio_pci_vector_config_release(proxy);
+ }
+config_assign_error:
+ virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, !assign,
+ with_irqfd);
assign_error:
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
assert(assign);
--
MST
- [PULL 14/51] vhost-user: Fix the virtio features negotiation flaw, (continued)
- [PULL 14/51] vhost-user: Fix the virtio features negotiation flaw, Michael S. Tsirkin, 2023/01/05
- [PULL 16/51] virtio-pci: decouple notifier from interrupt process, Michael S. Tsirkin, 2023/01/05
- [PULL 17/51] virtio-pci: decouple the single vector from the interrupt process, Michael S. Tsirkin, 2023/01/05
- [PULL 15/51] virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX, Michael S. Tsirkin, 2023/01/05
- [PULL 18/51] vhost: introduce new VhostOps vhost_set_config_call, Michael S. Tsirkin, 2023/01/05
- [PULL 20/51] virtio: add support for configure interrupt, Michael S. Tsirkin, 2023/01/05
- [PULL 23/51] virtio-mmio: add support for configure interrupt, Michael S. Tsirkin, 2023/01/05
- [PULL 19/51] vhost-vdpa: add support for config interrupt, Michael S. Tsirkin, 2023/01/05
- [PULL 21/51] vhost: add support for configure interrupt, Michael S. Tsirkin, 2023/01/05
- [PULL 22/51] virtio-net: add support for configure interrupt, Michael S. Tsirkin, 2023/01/05
- [PULL 24/51] virtio-pci: add support for configure interrupt,
Michael S. Tsirkin <=
- [PULL 26/51] hw/virtio: Extract QMP QOM-specific functions to virtio-qmp.c, Michael S. Tsirkin, 2023/01/05
- [PULL 25/51] hw/virtio: Rename virtio_device_find() -> qmp_find_virtio_device(), Michael S. Tsirkin, 2023/01/05
- [PULL 27/51] include/hw/pci: Break inclusion loop pci_bridge.h and cxl.h, Michael S. Tsirkin, 2023/01/05
- [PULL 30/51] include/hw/pci: Clean up a few things checkpatch.pl would flag, Michael S. Tsirkin, 2023/01/05
- [PULL 29/51] include/hw/cxl: Include hw/cxl/*.h where needed, Michael S. Tsirkin, 2023/01/05
- [PULL 31/51] include/hw/pci: Split pci_device.h off pci.h, Michael S. Tsirkin, 2023/01/05
- [PULL 34/51] include/hw/virtio: Break inclusion loop, Michael S. Tsirkin, 2023/01/05
- [PULL 35/51] include: Include headers where needed, Michael S. Tsirkin, 2023/01/05
- [PULL 36/51] include: Don't include qemu/osdep.h, Michael S. Tsirkin, 2023/01/05
- [PULL 37/51] docs/devel: Rules on #include in headers, Michael S. Tsirkin, 2023/01/05