PIT and PCSPK are emulated by the hypervisor so we don't need to emulate
them in Qemu: this patch prevents Qemu from waking up needlessly at
PIT_FREQ on Xen.
Signed-off-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
---
hw/pc.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/hw/pc.c b/hw/pc.c
index 31608d3..18abee0 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -44,6 +44,7 @@
#include "ui/qemu-spice.h"
#include "memory.h"
#include "exec-memory.h"
+#include "arch_init.h"
/* output Bochs bios info messages */
//#define DEBUG_BIOS
@@ -1137,7 +1138,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
DriveInfo *fd[MAX_FD];
qemu_irq rtc_irq = NULL;
qemu_irq *a20_line;
- ISADevice *i8042, *port92, *vmmouse, *pit;
+ ISADevice *i8042, *port92, *vmmouse, *pit = NULL;
qemu_irq *cpu_exit_irq;
register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
@@ -1158,8 +1159,10 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
qemu_register_boot_set(pc_boot_set, *rtc_state);
- pit = pit_init(isa_bus, 0x40, 0);
- pcspk_init(pit);
+ if (!xen_available()) {
+ pit = pit_init(isa_bus, 0x40, 0);
+ pcspk_init(pit);
+ }
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
if (serial_hds[i]) {
--
1.7.2.5
