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hw/isa/piix3: Wire up Xen PCI IRQ handling outside of PIIX3

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xen_intx_set_irq() doesn't depend on PIIX3State. In order to resolve
TYPE_PIIX3_XEN_DEVICE and in order to make Xen agnostic about the
precise south bridge being used, set up Xen's PCI IRQ handling of PIIX3
in the board.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Tested-by: Chuck Zmudzinski <brchuckz@aol.com>
Message-Id: <20230312120221.99183-4-shentey@gmail.com>
Message-Id: <20230403074124.3925-5-shentey@gmail.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
This commit is contained in:
Bernhard Beschow 2023-04-03 09:41:21 +02:00 • committed by Anthony PERARD
parent a58a31a6a1
commit 60a9eb57f3
2 changed files with 14 additions and 23 deletions
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13
hw/i386/pc_piix.c
View file

@ -71,6 +71,7 @@
#include "kvm/kvm-cpu.h"
#define MAX_IDE_BUS 2
#define XEN_IOAPIC_NUM_PIRQS 128ULL
#ifdef CONFIG_IDE_ISA
static const int ide_iobase[MAX_IDE_BUS] = { 0x1f0, 0x170 };
@ -238,6 +239,18 @@ static void pc_init1(MachineState *machine,
pcms->bus = pci_bus;
pci_dev = pci_create_simple_multifunction(pci_bus, -1, true, type);
if (xen_enabled()) {
/*
* Xen supports additional interrupt routes from the PCI devices to
* the IOAPIC: the four pins of each PCI device on the bus are also
* connected to the IOAPIC directly.
* These additional routes can be discovered through ACPI.
*/
pci_bus_irqs(pci_bus, xen_intx_set_irq, pci_dev,
XEN_IOAPIC_NUM_PIRQS);
}
piix3 = PIIX3_PCI_DEVICE(pci_dev);
piix3->pic = x86ms->gsi;
piix3_devfn = piix3->dev.devfn;