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From: John Levon <john.levon@nutanix.com>
To: qemu-devel@nongnu.org
Cc: Jason Herne <jjherne@linux.ibm.com>,
Thanos Makatos <thanos.makatos@nutanix.com>,
Halil Pasic <pasic@linux.ibm.com>,
=?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>,
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John Levon <john.levon@nutanix.com>, Paolo Bonzini <pbonzini@redhat.com>,
=?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>,
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=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: [PATCH v8 06/28] vfio: refactor out vfio_interrupt_setup()
Date: Wed, 19 Feb 2025 15:48:36 +0100
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Refactor the interrupt setup code out of vfio_realize(), as we will
later need this for vfio-user too.
Signed-off-by: John Levon <john.levon@nutanix.com>
---
hw/vfio/pci.c | 54 +++++++++++++++++++++++++++++++--------------------
1 file changed, 33 insertions(+), 21 deletions(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 89d900e9cf..5fb6c4c4c6 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2957,6 +2957,37 @@ static void vfio_unregister_req_notifier(VFIOPCIDevi=
ce *vdev)
vdev->req_enabled =3D false;
}
=20
+static bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp)
+{
+ PCIDevice *pdev =3D &vdev->pdev;
+
+ /* QEMU emulates all of MSI & MSIX */
+ if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
+ memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
+ MSIX_CAP_LENGTH);
+ }
+
+ if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
+ memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
+ vdev->msi_cap_size);
+ }
+
+ if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
+ vdev->intx.mmap_timer =3D timer_new_ms(QEMU_CLOCK_VIRTUAL,
+ vfio_intx_mmap_enable, v=
dev);
+ pci_device_set_intx_routing_notifier(&vdev->pdev,
+ vfio_intx_routing_notifier);
+ vdev->irqchip_change_notifier.notify =3D vfio_irqchip_change;
+ kvm_irqchip_add_change_notifier(&vdev->irqchip_change_notifier);
+ if (!vfio_intx_enable(vdev, errp)) {
+ pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
+ kvm_irqchip_remove_change_notifier(&vdev->irqchip_change_notif=
ier);
+ return false;
+ }
+ }
+ return true;
+}
+
static void vfio_realize(PCIDevice *pdev, Error **errp)
{
ERRP_GUARD();
@@ -3157,27 +3188,8 @@ static void vfio_realize(PCIDevice *pdev, Error **er=
rp)
}
}
=20
- /* QEMU emulates all of MSI & MSIX */
- if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
- memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
- MSIX_CAP_LENGTH);
- }
-
- if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
- memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
- vdev->msi_cap_size);
- }
-
- if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
- vdev->intx.mmap_timer =3D timer_new_ms(QEMU_CLOCK_VIRTUAL,
- vfio_intx_mmap_enable, v=
dev);
- pci_device_set_intx_routing_notifier(&vdev->pdev,
- vfio_intx_routing_notifier);
- vdev->irqchip_change_notifier.notify =3D vfio_irqchip_change;
- kvm_irqchip_add_change_notifier(&vdev->irqchip_change_notifier);
- if (!vfio_intx_enable(vdev, errp)) {
- goto out_deregister;
- }
+ if (!vfio_interrupt_setup(vdev, errp)) {
+ goto out_teardown;
}
=20
if (vdev->display !=3D ON_OFF_AUTO_OFF) {
--=20
2.34.1