From: Jan Kiszka <jan.kis...@siemens.com>
If the polarity bit is set in a redirection table entry, the input level
simply has to inverted as it is low active in this case.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
hw/ioapic.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/hw/ioapic.c b/hw/ioapic.c
index 5916387..61991d7 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -148,6 +148,9 @@ static void ioapic_set_irq(void *opaque, int vector, int
level)
uint32_t mask = 1 << vector;
uint64_t entry = s->ioredtbl[vector];
+ if (entry & (1 << IOAPIC_LVT_POLARITY_SHIFT)) {
+ level = !level;
+ }
if (((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1) ==
IOAPIC_TRIGGER_LEVEL) {
/* level triggered */
