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xen: Introduce Xen Interrupt Controller

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Every set_irq call makes a Xen hypercall.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Anthony PERARD 2010-06-30 17:50:10 +01:00 committed by Alexander Graf
parent 4144530012
commit 9c11a8ac88
4 changed files with 25 additions and 2 deletions
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8
hw/pc_piix.c
View File

@ -110,8 +110,12 @@ static void pc_init1(ram_addr_t ram_size,
below_4g_mem_size, above_4g_mem_size);
}
cpu_irq = pc_allocate_cpu_irq();
i8259 = i8259_init(cpu_irq[0]);
if (!xen_enabled()) {
cpu_irq = pc_allocate_cpu_irq();
i8259 = i8259_init(cpu_irq[0]);
} else {
i8259 = xen_interrupt_controller_init();
}
isa_irq_state = qemu_mallocz(sizeof(*isa_irq_state));
isa_irq_state->i8259 = i8259;
if (pci_enabled) {

2
hw/xen.h
View File

@ -35,6 +35,8 @@ int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num);
void xen_piix3_set_irq(void *opaque, int irq_num, int level);
void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len);
qemu_irq *xen_interrupt_controller_init(void);
int xen_init(void);
int xen_hvm_init(void);
void xen_vcpu_init(void);

12
xen-all.c
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@ -40,6 +40,18 @@ void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
}
}
/* Xen Interrupt Controller */
static void xen_set_irq(void *opaque, int irq, int level)
{
xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
}
qemu_irq *xen_interrupt_controller_init(void)
{
return qemu_allocate_irqs(xen_set_irq, NULL, 16);
}
/* VCPU Operations, MMIO, IO ring ... */
static void xen_reset_vcpu(void *opaque)

5
xen-stub.c
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@ -22,6 +22,11 @@ void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
{
}
qemu_irq *xen_interrupt_controller_init(void)
{
return NULL;
}
int xen_init(void)
{
return -ENOSYS;