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Remove e a redundant layer of function calling in the event handling path

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This commit is contained in:
cherry 2012-11-10 16:28:06 +00:00
parent 0002c266f0
commit d204c4c45c
3 changed files with 13 additions and 59 deletions
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17
sys/arch/amd64/amd64/spl.S
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@ -1,4 +1,4 @@
/* $NetBSD: spl.S,v 1.25 2012/11/02 08:31:28 yamt Exp $ */
/* $NetBSD: spl.S,v 1.26 2012/11/10 16:28:06 cherry Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
@ -344,18 +344,3 @@ doreti_checkast:
call _C_LABEL(do_pmap_load)
CLI(si)
jmp doreti_checkast /* recheck ASTs */
#ifdef XEN
NENTRY(call_evtchn_do_event)
incl CPUVAR(IDEPTH)
call _C_LABEL(evtchn_do_event)
decl CPUVAR(IDEPTH)
ret
#ifdef DOM0OPS
NENTRY(call_xenevt_event)
incl CPUVAR(IDEPTH)
call _C_LABEL(xenevt_event)
decl CPUVAR(IDEPTH)
ret
#endif /* DOM0OPS */
#endif /* XEN */

40
sys/arch/i386/i386/spl.S
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@ -1,4 +1,4 @@
/* $NetBSD: spl.S,v 1.37 2012/06/15 14:09:26 yamt Exp $ */
/* $NetBSD: spl.S,v 1.38 2012/11/10 16:28:06 cherry Exp $ */
/*
* Copyright (c) 1998, 2007, 2008 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <machine/asm.h>
__KERNEL_RCSID(0, "$NetBSD: spl.S,v 1.37 2012/06/15 14:09:26 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: spl.S,v 1.38 2012/11/10 16:28:06 cherry Exp $");
#include "opt_vm86.h"
#include "opt_ddb.h"
@ -322,42 +322,6 @@ doreti_checkast:
#endif /* defined(DEBUG) */
IDTVEC_END(doreti)
#ifdef XEN
/*
* void evtchn_do_event(int evtch, struct intrframe *regs)
*/
ENTRY(call_evtchn_do_event)
IDEPTH_INCR
/*
* IDEPTH_INCR leaves old %esp in %eax.
*/
pushl 8(%eax) /* regs */
pushl 4(%eax) /* evtch */
call _C_LABEL(evtchn_do_event)
addl $8, %esp
IDEPTH_DECR
ret
END(call_evtchn_do_event)
#ifdef DOM0OPS
/*
* void xenevt_event(int port)
*/
ENTRY(call_xenevt_event)
IDEPTH_INCR
/*
* IDEPTH_INCR leaves old %esp in %eax.
*/
pushl 4(%eax) /* evtch */
call _C_LABEL(xenevt_event)
addl $4, %esp
IDEPTH_DECR
ret
END(call_xenevt_event)
#endif /* DOM0OPS */
#endif /* XEN */
#ifndef XEN
/*
* Xsoftintr()

15
sys/arch/xen/x86/hypervisor_machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: hypervisor_machdep.c,v 1.21 2011/12/27 07:47:00 cherry Exp $ */
/* $NetBSD: hypervisor_machdep.c,v 1.22 2012/11/10 16:28:06 cherry Exp $ */
/*
*
@ -54,7 +54,7 @@
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: hypervisor_machdep.c,v 1.21 2011/12/27 07:47:00 cherry Exp $");
__KERNEL_RCSID(0, "$NetBSD: hypervisor_machdep.c,v 1.22 2012/11/10 16:28:06 cherry Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -226,15 +226,20 @@ evt_do_hypervisor_callback(struct cpu_info *ci, unsigned int port,
if (port == PORT_DEBUG)
printf("do_hypervisor_callback event %d\n", port);
#endif
if (evtsource[port])
call_evtchn_do_event(port, regs);
if (evtsource[port]) {
ci->ci_idepth++;
evtchn_do_event(port, regs);
ci->ci_idepth--;
}
#ifdef DOM0OPS
else {
if (ci->ci_ilevel < IPL_HIGH) {
/* fast path */
int oipl = ci->ci_ilevel;
ci->ci_ilevel = IPL_HIGH;
call_xenevt_event(port);
ci->ci_idepth++;
xenevt_event(port);
ci->ci_idepth--;
ci->ci_ilevel = oipl;
} else {
/* set pending event */