Mailing List Archive

From: Anthony PERARD <anthony.perard@citrix.com>

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>
---
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 b57ff01..72864fc 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


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