diff options
author | Jan Kiszka <jan.kiszka@siemens.com> | 2012-07-09 16:42:31 +0200 |
---|---|---|
committer | Avi Kivity <avi@redhat.com> | 2012-07-10 11:31:08 +0300 |
commit | a94820ddc36f8c452b37f9dcb323f55ffdbc75f9 (patch) | |
tree | 354d8ec0391c8e98ae8f04ef09734939443cbdfe /hw | |
parent | 3db3659bf60094657e1465cc809acb09551816ee (diff) | |
download | hqemu-a94820ddc36f8c452b37f9dcb323f55ffdbc75f9.zip hqemu-a94820ddc36f8c452b37f9dcb323f55ffdbc75f9.tar.gz |
apic: Reevaluate pending interrupts on LVT_LINT0 changes
When the guest modifies the LVT_LINT0 register, we need to check if some
pending PIC interrupt can now be delivered.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/apic.c | 18 |
1 files changed, 14 insertions, 4 deletions
@@ -532,6 +532,15 @@ static void apic_deliver(DeviceState *d, uint8_t dest, uint8_t dest_mode, apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, trigger_mode); } +static bool apic_check_pic(APICCommonState *s) +{ + if (!apic_accept_pic_intr(&s->busdev.qdev) || !pic_get_output(isa_pic)) { + return false; + } + apic_deliver_pic_intr(&s->busdev.qdev, 1); + return true; +} + int apic_get_interrupt(DeviceState *d) { APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d); @@ -559,9 +568,7 @@ int apic_get_interrupt(DeviceState *d) apic_sync_vapic(s, SYNC_TO_VAPIC); /* re-inject if there is still a pending PIC interrupt */ - if (apic_accept_pic_intr(&s->busdev.qdev) && pic_get_output(isa_pic)) { - apic_deliver_pic_intr(&s->busdev.qdev, 1); - } + apic_check_pic(s); apic_update_irq(s); @@ -804,8 +811,11 @@ static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) { int n = index - 0x32; s->lvt[n] = val; - if (n == APIC_LVT_TIMER) + if (n == APIC_LVT_TIMER) { apic_timer_update(s, qemu_get_clock_ns(vm_clock)); + } else if (n == APIC_LVT_LINT0 && apic_check_pic(s)) { + apic_update_irq(s); + } } break; case 0x38: |