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openSUSE:Evergreen:11.4
xen.548
22484-vlapic-tmcct-periodic.patch
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File 22484-vlapic-tmcct-periodic.patch of Package xen.548
# HG changeset patch # User Keir Fraser <keir@xen.org> # Date 1291999745 0 # Node ID 3b3fce9050b9b14f3a11123f6943998413ea7e7e # Parent 901c118b363e978566775f9d118b4f2f15598212 hvm vlapic: Fix tmcct read logic when in periodic mode. Signed-off-by: Keir Fraser <keir@xen.org> Index: xen-4.0.3-testing/xen/arch/x86/hvm/vlapic.c =================================================================== --- xen-4.0.3-testing.orig/xen/arch/x86/hvm/vlapic.c +++ xen-4.0.3-testing/xen/arch/x86/hvm/vlapic.c @@ -428,12 +428,19 @@ int vlapic_ipi( static uint32_t vlapic_get_tmcct(struct vlapic *vlapic) { struct vcpu *v = current; - uint32_t tmcct, tmict = vlapic_get_reg(vlapic, APIC_TMICT); + uint32_t tmcct = 0, tmict = vlapic_get_reg(vlapic, APIC_TMICT); uint64_t counter_passed; counter_passed = ((hvm_get_guest_time(v) - vlapic->timer_last_update) - / APIC_BUS_CYCLE_NS / vlapic->hw.timer_divisor); - tmcct = tmict - counter_passed; + / (APIC_BUS_CYCLE_NS * vlapic->hw.timer_divisor)); + + if ( tmict != 0 ) + { + if ( vlapic_lvtt_period(vlapic) ) + counter_passed %= tmict; + if ( counter_passed < tmict ) + tmcct = tmict - counter_passed; + } HVM_DBG_LOG(DBG_LEVEL_VLAPIC_TIMER, "timer initial count %d, timer current count %d, "
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