haraldwolff/qemu-patch-raspberry4
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rtc: clear non-PF bits when reinjecting on ack

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When an rtc interrupt is reinjected immediately after being acked,
other interrupts should not be reinjected, so do clear their bits.

Also, if the periodic interrupts have been disabled before acking,
do not reinject, as the guest might get very confused!

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2011-11-21 19:00:31 +01:00 committed by Anthony Liguori
parent 663447d4ea
commit fbc15e27f7
1 changed files with 3 additions and 3 deletions
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6
hw/mc146818rtc.c
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@ -477,10 +477,13 @@ static uint32_t cmos_ioport_read(void *opaque, uint32_t addr)
case RTC_REG_C:
ret = s->cmos_data[s->cmos_index];
qemu_irq_lower(s->irq);
s->cmos_data[RTC_REG_C] = 0x00;
#ifdef TARGET_I386
if(s->irq_coalesced &&
(s->cmos_data[RTC_REG_B] & REG_B_PIE) &&
s->irq_reinject_on_ack_count < RTC_REINJECT_ON_ACK_COUNT) {
s->irq_reinject_on_ack_count++;
s->cmos_data[RTC_REG_C] |= REG_C_IRQF | REG_C_PF;
apic_reset_irq_delivered();
DPRINTF_C("cmos: injecting on ack\n");
qemu_irq_raise(s->irq);
@ -489,11 +492,8 @@ static uint32_t cmos_ioport_read(void *opaque, uint32_t addr)
DPRINTF_C("cmos: coalesced irqs decreased to %d\n",
s->irq_coalesced);
}
break;
}
#endif
s->cmos_data[RTC_REG_C] = 0x00;
break;
default:
ret = s->cmos_data[s->cmos_index];