diff options
| author | Jason Wang <jasowang@redhat.com> | 2021-10-19 10:01:47 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-11-01 12:26:48 +0300 |
| commit | 080cd7c3ac8701081d143a15ba17dd9475313188 (patch) | |
| tree | 4f05ff73855daeacdd2bad9098b1c9ee4a22e9b2 /drivers/virtio/virtio_pci_common.h | |
| parent | 9e35276a5344f74d4a3600fc4100b3dd251d5c56 (diff) | |
| download | linux-080cd7c3ac8701081d143a15ba17dd9475313188.tar.xz | |
virtio-pci: harden INTX interrupts
This patch tries to make sure the virtio interrupt handler for INTX
won't be called after a reset and before virtio_device_ready(). We
can't use IRQF_NO_AUTOEN since we're using shared interrupt
(IRQF_SHARED). So this patch tracks the INTX enabling status in a new
intx_soft_enabled variable and toggle it during in
vp_disable/enable_vectors(). The INTX interrupt handler will check
intx_soft_enabled before processing the actual interrupt.
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20211019070152.8236-6-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_pci_common.h')
| -rw-r--r-- | drivers/virtio/virtio_pci_common.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index d3c6f72c7390..23f6c5c678d5 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -63,6 +63,7 @@ struct virtio_pci_device { /* MSI-X support */ int msix_enabled; int intx_enabled; + bool intx_soft_enabled; cpumask_var_t *msix_affinity_masks; /* Name strings for interrupts. This size should be enough, * and I'm too lazy to allocate each name separately. */ |