[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V15 09/18] xen: Introduce Xen Interrupt Controller
From: Anthony PERARD <anthony.perard@xxxxxxxxxx> Every set_irq call makes a Xen hypercall. Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> --- hw/pc_piix.c | 8 ++++++-- hw/xen.h | 2 ++ xen-all.c | 12 ++++++++++++ xen-stub.c | 5 +++++ 4 files changed, 25 insertions(+), 2 deletions(-) diff --git a/hw/pc_piix.c b/hw/pc_piix.c index 9353b91..62cdf71 100644 --- a/hw/pc_piix.c +++ b/hw/pc_piix.c @@ -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) { diff --git a/hw/xen.h b/hw/xen.h index a4096ca..9f00c0b 100644 --- a/hw/xen.h +++ b/hw/xen.h @@ -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); diff --git a/xen-all.c b/xen-all.c index acb051c..bb809ef 100644 --- a/xen-all.c +++ b/xen-all.c @@ -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) diff --git a/xen-stub.c b/xen-stub.c index dc90f10..3a8449c 100644 --- a/xen-stub.c +++ b/xen-stub.c @@ -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; -- 1.7.2.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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