On Sun, Nov 09, 2025 at 09:54:23AM +1000, David Gwynne wrote:
> ...
> so ok on this?

I think the diff is missing a change for amd64/conf/files.amd64:
To actually compile don't we need device cpu to depend on xcall?
Like this:

diff --git a/sys/arch/amd64/conf/files.amd64 b/sys/arch/amd64/conf/files.amd64
index 630de36a01d..38d5796f650 100644
--- a/sys/arch/amd64/conf/files.amd64
+++ b/sys/arch/amd64/conf/files.amd64
@@ -95,7 +95,7 @@ file	arch/amd64/amd64/mpbios.c		mpbios needs-flag
 file	arch/amd64/amd64/mpbios_intr_fixup.c	mpbios & pci
 
 define	cpu {[apid = -1]}
-device	cpu
+device	cpu: xcall
 attach	cpu at mainbus
 file	arch/amd64/amd64/cpu.c	cpu