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authorEric Auger <eric.auger@linaro.org>2015-10-05 12:30:12 -0600
committerAlex Williamson <alex.williamson@redhat.com>2015-10-05 12:30:12 -0600
commita22313deca720e038ebc5805cf451b3a685d29ce (patch)
tree709b5b7c0502cd08ca3f8934c9fcf60b728469be
parent58892b447f0ffcd0967bc6f1bcb40df288ebeebc (diff)
downloadqemu-arm-a22313deca720e038ebc5805cf451b3a685d29ce.tar.gz
hw/vfio/platform: change interrupt/unmask fields into pointer
unmask EventNotifier might not be initialized in case of edge sensitive irq. Using EventNotifier pointers make life simpler to handle the edge-sensitive irqfd setup. Signed-off-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
-rw-r--r--hw/vfio/platform.c35
-rw-r--r--include/hw/vfio/vfio-platform.h4
2 files changed, 22 insertions, 17 deletions
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index d864342bf1..cab1517bc2 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -57,15 +57,20 @@ static VFIOINTp *vfio_init_intp(VFIODevice *vbasedev,
sysbus_init_irq(sbdev, &intp->qemuirq);
/* Get an eventfd for trigger */
- ret = event_notifier_init(&intp->interrupt, 0);
+ intp->interrupt = g_malloc0(sizeof(EventNotifier));
+ ret = event_notifier_init(intp->interrupt, 0);
if (ret) {
+ g_free(intp->interrupt);
g_free(intp);
error_report("vfio: Error: trigger event_notifier_init failed ");
return NULL;
}
/* Get an eventfd for resample/unmask */
- ret = event_notifier_init(&intp->unmask, 0);
+ intp->unmask = g_malloc0(sizeof(EventNotifier));
+ ret = event_notifier_init(intp->unmask, 0);
if (ret) {
+ g_free(intp->interrupt);
+ g_free(intp->unmask);
g_free(intp);
error_report("vfio: Error: resamplefd event_notifier_init failed");
return NULL;
@@ -100,7 +105,7 @@ static int vfio_set_trigger_eventfd(VFIOINTp *intp,
irq_set->start = 0;
irq_set->count = 1;
pfd = (int32_t *)&irq_set->data;
- *pfd = event_notifier_get_fd(&intp->interrupt);
+ *pfd = event_notifier_get_fd(intp->interrupt);
qemu_set_fd_handler(*pfd, (IOHandler *)handler, NULL, intp);
ret = ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
g_free(irq_set);
@@ -182,7 +187,7 @@ static void vfio_intp_mmap_enable(void *opaque)
static void vfio_intp_inject_pending_lockheld(VFIOINTp *intp)
{
trace_vfio_platform_intp_inject_pending_lockheld(intp->pin,
- event_notifier_get_fd(&intp->interrupt));
+ event_notifier_get_fd(intp->interrupt));
intp->state = VFIO_IRQ_ACTIVE;
@@ -224,18 +229,18 @@ static void vfio_intp_interrupt(VFIOINTp *intp)
trace_vfio_intp_interrupt_set_pending(intp->pin);
QSIMPLEQ_INSERT_TAIL(&vdev->pending_intp_queue,
intp, pqnext);
- ret = event_notifier_test_and_clear(&intp->interrupt);
+ ret = event_notifier_test_and_clear(intp->interrupt);
qemu_mutex_unlock(&vdev->intp_mutex);
return;
}
trace_vfio_platform_intp_interrupt(intp->pin,
- event_notifier_get_fd(&intp->interrupt));
+ event_notifier_get_fd(intp->interrupt));
- ret = event_notifier_test_and_clear(&intp->interrupt);
+ ret = event_notifier_test_and_clear(intp->interrupt);
if (!ret) {
error_report("Error when clearing fd=%d (ret = %d)",
- event_notifier_get_fd(&intp->interrupt), ret);
+ event_notifier_get_fd(intp->interrupt), ret);
}
intp->state = VFIO_IRQ_ACTIVE;
@@ -283,7 +288,7 @@ static void vfio_platform_eoi(VFIODevice *vbasedev)
QLIST_FOREACH(intp, &vdev->intp_list, next) {
if (intp->state == VFIO_IRQ_ACTIVE) {
trace_vfio_platform_eoi(intp->pin,
- event_notifier_get_fd(&intp->interrupt));
+ event_notifier_get_fd(intp->interrupt));
intp->state = VFIO_IRQ_INACTIVE;
/* deassert the virtual IRQ */
@@ -360,7 +365,7 @@ static int vfio_set_resample_eventfd(VFIOINTp *intp)
irq_set->start = 0;
irq_set->count = 1;
pfd = (int32_t *)&irq_set->data;
- *pfd = event_notifier_get_fd(&intp->unmask);
+ *pfd = event_notifier_get_fd(intp->unmask);
qemu_set_fd_handler(*pfd, NULL, NULL, NULL);
ret = ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
g_free(irq_set);
@@ -396,8 +401,8 @@ static void vfio_start_irqfd_injection(SysBusDevice *sbdev, qemu_irq irq)
}
assert(intp);
- if (kvm_irqchip_add_irqfd_notifier(kvm_state, &intp->interrupt,
- &intp->unmask, irq) < 0) {
+ if (kvm_irqchip_add_irqfd_notifier(kvm_state, intp->interrupt,
+ intp->unmask, irq) < 0) {
goto fail_irqfd;
}
@@ -411,11 +416,11 @@ static void vfio_start_irqfd_injection(SysBusDevice *sbdev, qemu_irq irq)
intp->kvm_accel = true;
trace_vfio_platform_start_irqfd_injection(intp->pin,
- event_notifier_get_fd(&intp->interrupt),
- event_notifier_get_fd(&intp->unmask));
+ event_notifier_get_fd(intp->interrupt),
+ event_notifier_get_fd(intp->unmask));
return;
fail_vfio:
- kvm_irqchip_remove_irqfd_notifier(kvm_state, &intp->interrupt, irq);
+ kvm_irqchip_remove_irqfd_notifier(kvm_state, intp->interrupt, irq);
error_report("vfio: failed to start eventfd signaling for IRQ %d: %m",
intp->pin);
abort();
diff --git a/include/hw/vfio/vfio-platform.h b/include/hw/vfio/vfio-platform.h
index c5cf1d79f3..b468f80b1e 100644
--- a/include/hw/vfio/vfio-platform.h
+++ b/include/hw/vfio/vfio-platform.h
@@ -34,8 +34,8 @@ enum {
typedef struct VFIOINTp {
QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */
QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */
- EventNotifier interrupt; /* eventfd triggered on interrupt */
- EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
+ EventNotifier *interrupt; /* eventfd triggered on interrupt */
+ EventNotifier *unmask; /* eventfd for unmask on QEMU bypass */
qemu_irq qemuirq;
struct VFIOPlatformDevice *vdev; /* back pointer to device */
int state; /* inactive, pending, active */