commit d99ed62c88f9129fba3455f5d74dc4ecd0e8b646
author Keir Fraser <keirf@google.com> Tue Sep 12 14:21:17 2023 +0000
committer Keir Fraser <keirf@google.com> Tue Sep 12 15:08:05 2023 +0000
tree d84401c8977db8ebe00486396d14e012b3b98334
parent e17d182ad3f797f01947fc234d95c96c050c534b

virtio/pci: Level-trigger the legacy IRQ line in all cases

The PCI legacy IRQ line is level triggered, but is treated as
edge triggered via kvm__irq_trigger() for signalling of config
changes.

Fix this by using kvm__irq_level(), as for queue signalling.

Signed-off-by: Keir Fraser <keirf@google.com>

virtio/pci.c

diff --git a/virtio/pci.c b/virtio/pci.c
index 701f456..7a206be 100644
--- a/virtio/pci.c
+++ b/virtio/pci.c
@@ -264,7 +264,7 @@
 			kvm__irq_trigger(kvm, vpci->config_gsi);
 	} else {
 		vpci->isr = VIRTIO_PCI_ISR_CONFIG;
-		kvm__irq_trigger(kvm, vpci->legacy_irq_line);
+		kvm__irq_line(kvm, vpci->legacy_irq_line, VIRTIO_IRQ_HIGH);
 	}
 
 	return 0;