@@ -30,7 +30,11 @@ static void pch_pic_update_irq(LoongArchPCHPIC *s, uint64_t mask, int level)
qemu_set_irq(s->parent_irq[s->htmsi_vector[irq]], 1);
}
} else {
- val = mask & s->intisr;
+ /*
+ * intirr means requested pending irq
+ * do not clear pending irq for edge-triggered on lowering edge
+ */
+ val = mask & s->intisr & ~s->intirr;
if (val) {
irq = ctz64(val);
s->intisr &= ~MAKE_64BIT_MASK(irq, 1);
@@ -51,6 +55,7 @@ static void pch_pic_irq_handler(void *opaque, int irq, int level)
/* Edge triggered */
if (level) {
if ((s->last_intirr & mask) == 0) {
+ /* marked pending on a rising edge */
s->intirr |= mask;
}
s->last_intirr |= mask;