From: Anthony PERARD <anthony.per...@citrix.com>
Every set_irq call makes a Xen hypercall.
Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
---
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 765877c..27d9030 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -98,8 +98,12 @@ static void pc_init1(ram_addr_t ram_size,
pc_memory_init(ram_size, kernel_filename, kernel_cmdline, initrd_filename,
&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 2a53f8b..37d7b99 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);
+
void pci_xen_platform_init(PCIBus *bus);
int xen_init(int smp_cpus);
diff --git a/xen-all.c b/xen-all.c
index 123decb..73149f2 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -42,6 +42,18 @@ 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);
+}
+
/* Initialise Xen */
int xen_init(int smp_cpus)
diff --git a/xen-stub.c b/xen-stub.c
index ba95537..bc2ae12 100644
--- a/xen-stub.c
+++ b/xen-stub.c
@@ -24,6 +24,11 @@ void xen_piix_pci_write_config_client(uint32_t address,
uint32_t val, int len)
{
}
+qemu_irq *xen_interrupt_controller_init(void)
+{
+ return NULL;
+}
+
void pci_xen_platform_init(PCIBus *bus)
{
}
--
1.7.1
