diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/lguest/boot.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index aa6e3b4ce29c..2943ab931671 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -56,6 +56,7 @@ #include <linux/virtio_console.h> #include <linux/pm.h> #include <linux/export.h> +#include <linux/pci.h> #include <asm/acpi.h> #include <asm/apic.h> #include <asm/lguest.h> @@ -72,6 +73,7 @@ #include <asm/stackprotector.h> #include <asm/reboot.h> /* for struct machine_ops */ #include <asm/kvm_para.h> +#include <asm/pci_x86.h> /*G:010 * Welcome to the Guest! @@ -832,6 +834,24 @@ static struct irq_chip lguest_irq_controller = { .irq_unmask = enable_lguest_irq, }; +static int lguest_enable_irq(struct pci_dev *dev) +{ + u8 line = 0; + + /* We literally use the PCI interrupt line as the irq number. */ + pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); + irq_set_chip_and_handler_name(line, &lguest_irq_controller, + handle_level_irq, "level"); + dev->irq = line; + return 0; +} + +/* We don't do hotplug PCI, so this shouldn't be called. */ +static void lguest_disable_irq(struct pci_dev *dev) +{ + WARN_ON(1); +} + /* * This sets up the Interrupt Descriptor Table (IDT) entry for each hardware * interrupt (except 128, which is used for system calls), and then tells the @@ -1432,6 +1452,10 @@ __init void lguest_init(void) /* Don't let ACPI try to control our PCI interrupts. */ disable_acpi(); + /* We control them ourselves, by overriding these two hooks. */ + pcibios_enable_irq = lguest_enable_irq; + pcibios_disable_irq = lguest_disable_irq; + /* * Last of all, we set the power management poweroff hook to point to * the Guest routine to power off, and the reboot hook to our restart |