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virtio-pci: add support for configure interrupt 

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>
This commit is contained in:
Cindy Lu 2022-12-22 15:04:51 +08:00 committed by Michael S. Tsirkin
parent cd336e8346
commit 1680542862
2 changed files with 102 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
hw/virtio/virtio-pci.c
View File

@ -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, &notifier,
&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);

4
include/hw/virtio/virtio-pci.h
View File

@ -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