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authorLiu Ping Fan <qemulist@gmail.com>2013-12-08 17:38:17 +0800
committerMichael S. Tsirkin <mst@redhat.com>2013-12-11 20:11:09 +0200
commit7a10ef51c2397ac4323bc786af02c58b413b5cd2 (patch)
tree1081bc99a1661c9cb112f681d300f12e4ef7c6a8 /hw/i386/pc.c
parent0d63b2dd31464cfccc80bbeedc24e3863fe4c895 (diff)
hpet: enable to entitle more irq pins for hpet
Owning to some different hardware design, piix and q35 need different compat. So making them diverge. On q35, IRQ2/8 can be reserved for hpet timer 0/1. And pin 16~23 can be assigned to hpet as guest chooses. So we introduce intcap property to do that. Consider the compat and piix/q35, we finally have the following value for intcap: For piix, hpet's intcap is hard coded as IRQ2. For pc-q35-1.7 and earlier, we use IRQ2 for compat reason. Otherwise IRQ2, IRQ8, and IRQ16~23 are allowed. Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/i386/pc.c')
-rw-r--r--hw/i386/pc.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 6c82ada3d4..8353d10fa2 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1253,7 +1253,8 @@ static const MemoryRegionOps ioportF0_io_ops = {
void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
ISADevice **rtc_state,
ISADevice **floppy,
- bool no_vmport)
+ bool no_vmport,
+ uint32 hpet_irqs)
{
int i;
DriveInfo *fd[MAX_FD];
@@ -1280,9 +1281,21 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
* when the HPET wants to take over. Thus we have to disable the latter.
*/
if (!no_hpet && (!kvm_irqchip_in_kernel() || kvm_has_pit_state2())) {
- hpet = sysbus_try_create_simple("hpet", HPET_BASE, NULL);
-
+ /* In order to set property, here not using sysbus_try_create_simple */
+ hpet = qdev_try_create(NULL, "hpet");
if (hpet) {
+ /* For pc-piix-*, hpet's intcap is always IRQ2. For pc-q35-1.7
+ * and earlier, use IRQ2 for compat. Otherwise, use IRQ16~23,
+ * IRQ8 and IRQ2.
+ */
+ uint8_t compat = object_property_get_int(OBJECT(hpet),
+ HPET_INTCAP, NULL);
+ if (!compat) {
+ qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
+ }
+ qdev_init_nofail(hpet);
+ sysbus_mmio_map(SYS_BUS_DEVICE(hpet), 0, HPET_BASE);
+
for (i = 0; i < GSI_NUM_PINS; i++) {
sysbus_connect_irq(SYS_BUS_DEVICE(hpet), i, gsi[i]);
}