From 14f7caf77578c022f58c2ecd741920ee69889675 Mon Sep 17 00:00:00 2001 From: "kaf24@firebug.cl.cam.ac.uk" Date: Fri, 1 Jul 2005 21:25:45 +0000 Subject: [PATCH] Register the portio handler only once. Signed-off-by: Arun Sharma --- xen/arch/x86/vmx_intercept.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/vmx_intercept.c b/xen/arch/x86/vmx_intercept.c index c68195090b..2a8322618a 100644 --- a/xen/arch/x86/vmx_intercept.c +++ b/xen/arch/x86/vmx_intercept.c @@ -216,7 +216,7 @@ void vmx_hooks_assist(struct vcpu *d) 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 @@ void vmx_hooks_assist(struct vcpu *d) 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 @@ void vmx_hooks_assist(struct vcpu *d) 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); } } -- 2.30.2