mirror of https://gitee.com/openkylin/linux.git
b68e7fa879
vfoi-pci supports a mechanism like KVM's irqfd for unmasking an interrupt through an eventfd. There are two ways to shutdown this interface: 1) close the eventfd, 2) ioctl (such as disabling the interrupt). Both of these do the release through a workqueue, which can result in a segfault if two jobs get queued for the same virqfd. Fix this by protecting the pointer to these virqfds by a spinlock. The vfio pci device will therefore no longer have a reference to it once the release job is queued under lock. On the ioctl side, we still flush the workqueue to ensure that any outstanding releases are completed. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> |
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| .. | ||
| pci | ||
| Kconfig | ||
| Makefile | ||
| vfio.c | ||
| vfio_iommu_type1.c | ||