From 1a8a3bfcad19687c67fb9e7861a71e2345909ce4 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 8 Oct 2025 16:07:33 -0400 Subject: kern/amd64: Reserve 64 vectors for I/O APIC inputs This commit reserves the first 64 vectors for the I/O APIC input lines. During an IRQ, each handler will be called to see which one handles it. Signed-off-by: Ian Moffett --- src/sys/arch/amd64/mainbus/intr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'src/sys/arch/amd64/mainbus/intr.c') diff --git a/src/sys/arch/amd64/mainbus/intr.c b/src/sys/arch/amd64/mainbus/intr.c index 01d4f54..d2215b4 100644 --- a/src/sys/arch/amd64/mainbus/intr.c +++ b/src/sys/arch/amd64/mainbus/intr.c @@ -58,7 +58,11 @@ intr_register(const struct intr_hand *ih) return NULL; } - vec = MAX(ih->ipl << IPL_SHIFT, 0x20); + /* + * The first 0x20 to 0x5F interrupt vectors are + * reserved for I/O APIC input pins + */ + vec = MAX(ih->ipl << IPL_SHIFT, 0x60); /* * We can have up to 15 interrupt vectors per -- cgit v1.2.3