diff options
Diffstat (limited to 'hw/i386/pc_piix.c')
| -rw-r--r-- | hw/i386/pc_piix.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 11af191513..2ed2b3f3c6 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -90,6 +90,21 @@ static int pc_pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx) return (pci_intx + slot_addend) & 3; } +static void piix_intx_routing_notifier_xen(PCIDevice *dev) +{ + int i; + + /* Scan for updates to PCI link routes (0x60-0x63). */ + for (i = 0; i < PIIX_NUM_PIRQS; i++) { + uint8_t v = dev->config_read(dev, PIIX_PIRQCA + i, 1); + if (v & 0x80) { + v = 0; + } + v &= 0xf; + xen_set_pci_link_route(i, v); + } +} + /* PC hardware initialisation */ static void pc_init1(MachineState *machine, const char *host_type, const char *pci_type) @@ -241,6 +256,9 @@ static void pc_init1(MachineState *machine, pci_dev = pci_create_simple_multifunction(pci_bus, -1, true, type); if (xen_enabled()) { + pci_device_set_intx_routing_notifier( + pci_dev, piix_intx_routing_notifier_xen); + /* * Xen supports additional interrupt routes from the PCI devices to * the IOAPIC: the four pins of each PCI device on the bus are also |