vfio-pci: Release INTx's unmask eventfd properly
The PCI device INTx uses event fd 'unmask_fd' to signal the deassertion
of the line from guest to host; but this eventfd isn't released properly
when disable INTx.
This patch firstly adds field 'unmask_fd' in struct vfio_pci_device for
storing unmask eventfd and close it when disable INTx.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
diff --git a/include/kvm/vfio.h b/include/kvm/vfio.h
index 60e6c54..28223cf 100644
--- a/include/kvm/vfio.h
+++ b/include/kvm/vfio.h
@@ -74,6 +74,7 @@
unsigned long irq_modes;
int intx_fd;
+ int unmask_fd;
unsigned int intx_gsi;
struct vfio_pci_msi_common msi;
struct vfio_pci_msi_common msix;
diff --git a/vfio/pci.c b/vfio/pci.c
index 03de3c1..5224fee 100644
--- a/vfio/pci.c
+++ b/vfio/pci.c
@@ -1008,6 +1008,7 @@
irq__del_irqfd(kvm, gsi, pdev->intx_fd);
close(pdev->intx_fd);
+ close(pdev->unmask_fd);
}
static int vfio_pci_enable_intx(struct kvm *kvm, struct vfio_device *vdev)
@@ -1095,6 +1096,7 @@
}
pdev->intx_fd = trigger_fd;
+ pdev->unmask_fd = unmask_fd;
/* Guest is going to ovewrite our irq_line... */
pdev->intx_gsi = gsi;
