[src/trunk]: src/sys Implement ipi_trigger_multi(9); requested by cherry@.

[rmind <rmind%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9777dabe22a9
branches:  trunk
changeset: 335652:9777dabe22a9
user:      rmind <rmind%NetBSD.org@localhost>
date:      Sun Jan 18 23:16:35 2015 +0000

description:
Implement ipi_trigger_multi(9); requested by cherry@.

diffstat:

 sys/kern/subr_ipi.c |  34 ++++++++++++++++++++++++++++++++--
 sys/sys/ipi.h       |   3 ++-
 2 files changed, 34 insertions(+), 3 deletions(-)

diffs (79 lines):

diff -r 67533834e7b9 -r 9777dabe22a9 sys/kern/subr_ipi.c
--- a/sys/kern/subr_ipi.c       Sun Jan 18 20:18:07 2015 +0000
+++ b/sys/kern/subr_ipi.c       Sun Jan 18 23:16:35 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: subr_ipi.c,v 1.2 2014/05/25 15:34:19 rmind Exp $       */
+/*     $NetBSD: subr_ipi.c,v 1.3 2015/01/18 23:16:35 rmind Exp $       */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_ipi.c,v 1.2 2014/05/25 15:34:19 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_ipi.c,v 1.3 2015/01/18 23:16:35 rmind Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -45,6 +45,7 @@
 #include <sys/evcnt.h>
 #include <sys/cpu.h>
 #include <sys/ipi.h>
+#include <sys/intr.h>
 #include <sys/kcpuset.h>
 #include <sys/kmem.h>
 #include <sys/lock.h>
@@ -188,6 +189,35 @@
 }
 
 /*
+ * ipi_trigger_multi: same as ipi_trigger() but sends to the multiple
+ * CPUs given the target CPU set.
+ */
+void
+ipi_trigger_multi(u_int ipi_id, const kcpuset_t *target)
+{
+       const cpuid_t selfid = cpu_index(curcpu());
+       CPU_INFO_ITERATOR cii;
+       struct cpu_info *ci;
+
+       KASSERT(kpreempt_disabled());
+       KASSERT(target != NULL);
+
+       for (CPU_INFO_FOREACH(cii, ci)) {
+               const cpuid_t cpuid = cpu_index(ci);
+
+               if (!kcpuset_isset(target, cpuid) || cpuid == selfid) {
+                       continue;
+               }
+               ipi_trigger(ipi_id, ci);
+       }
+       if (kcpuset_isset(target, selfid)) {
+               int s = splhigh();
+               ipi_cpu_handler();
+               splx(s);
+       }
+}
+
+/*
  * put_msg: insert message into the mailbox.
  */
 static inline void
diff -r 67533834e7b9 -r 9777dabe22a9 sys/sys/ipi.h
--- a/sys/sys/ipi.h     Sun Jan 18 20:18:07 2015 +0000
+++ b/sys/sys/ipi.h     Sun Jan 18 23:16:35 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ipi.h,v 1.2 2014/05/25 15:34:19 rmind Exp $    */
+/*     $NetBSD: ipi.h,v 1.3 2015/01/18 23:16:35 rmind Exp $    */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -67,6 +67,7 @@
 u_int  ipi_register(ipi_func_t, void *);
 void   ipi_unregister(u_int);
 void   ipi_trigger(u_int, struct cpu_info *);
+void   ipi_trigger_multi(u_int, const kcpuset_t *);
 
 /* Public interface: synchronous IPIs. */
 void   ipi_unicast(ipi_msg_t *, struct cpu_info *);