Arun Sharma
2005-Jul-01 18:57 UTC
[Xen-devel] [PATCH][5/5] Register the portio handler only once.
Register the portio handler only once.
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
diff -r d7bcd6f56b15 -r 63fd76ad669f xen/arch/x86/vmx_intercept.c
--- a/xen/arch/x86/vmx_intercept.c Thu Jun 30 22:27:41 2005
+++ b/xen/arch/x86/vmx_intercept.c Thu Jun 30 23:22:26 2005
@@ -216,7 +216,7 @@
shared_iopage_t *sp = get_sp(d->domain);
u64 *intr = &(sp->sp_global.pic_intr[0]);
struct vmx_virpit_t *vpit =
&(d->domain->arch.vmx_platform.vmx_pit);
- int rw_mode;
+ int rw_mode, reinit = 0;
/* load init count*/
if (p->state == STATE_IORESP_HOOK) {
@@ -224,6 +224,7 @@
if ( active_ac_timer(&(vpit->pit_timer)) ) {
VMX_DBG_LOG(DBG_LEVEL_1, "VMX_PIT: guest reset PIT with
channel %lx!\n", (unsigned long) ((p->u.data >> 24) & 0x3) );
rem_ac_timer(&(vpit->pit_timer));
+ reinit = 1;
}
else
init_ac_timer(&vpit->pit_timer, pit_timer_fn, vpit, 0);
@@ -268,7 +269,8 @@
p->state = STATE_IORESP_READY;
/* register handler to intercept the PIT io when vm_exit */
- register_portio_handler(0x40, 4, intercept_pit_io);
+ if (!reinit)
+ register_portio_handler(0x40, 4, intercept_pit_io);
}
}
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