diff options
Diffstat (limited to 'sys/amd64/amd64/apic_vector.S')
| -rw-r--r-- | sys/amd64/amd64/apic_vector.S | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sys/amd64/amd64/apic_vector.S b/sys/amd64/amd64/apic_vector.S index e4b6ea5..d91ff1c 100644 --- a/sys/amd64/amd64/apic_vector.S +++ b/sys/amd64/amd64/apic_vector.S @@ -3,6 +3,7 @@ * $FreeBSD$ */ +#include "opt_swtch.h" #include <machine/apic.h> #include <machine/smp.h> @@ -648,7 +649,28 @@ Xrendezvous: POP_FRAME iret +#ifdef LAZY_SWITCH +/* + * Clean up when we lose out on the lazy context switch optimization. + * ie: when we are about to release a PTD but a cpu is still borrowing it. + */ + SUPERALIGN_TEXT + .globl Xlazypmap +Xlazypmap: + PUSH_FRAME + movl $KDSEL, %eax + mov %ax, %ds /* use KERNEL data segment */ + mov %ax, %es + movl $KPSEL, %eax + mov %ax, %fs + + call pmap_lazyfix_action + movl $0, lapic+LA_EOI /* End Of Interrupt to APIC */ + POP_FRAME + iret +#endif + .data .globl apic_pin_trigger |
