CVS commit: src/sys

[Mindaugas Rasiukevicius]

Module Name:    src
Committed By:   rmind
Date:           Sun Jan 18 23:16:35 UTC 2015

Modified Files:
        src/sys/kern: subr_ipi.c
        src/sys/sys: ipi.h

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


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/kern/subr_ipi.c
cvs rdiff -u -r1.2 -r1.3 src/sys/sys/ipi.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.


Modified files:

Index: src/sys/kern/subr_ipi.c
diff -u src/sys/kern/subr_ipi.c:1.2 src/sys/kern/subr_ipi.c:1.3
--- src/sys/kern/subr_ipi.c:1.2	Sun May 25 15:34:19 2014
+++ src/sys/kern/subr_ipi.c	Sun Jan 18 23:16:35 2015
@@ -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 @@ __KERNEL_RCSID(0, "$NetBSD: subr_ipi.c,v
 #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(u_int ipi_id, struct cpu_inf
 }
 
 /*
+ * 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

Index: src/sys/sys/ipi.h
diff -u src/sys/sys/ipi.h:1.2 src/sys/sys/ipi.h:1.3
--- src/sys/sys/ipi.h:1.2	Sun May 25 15:34:19 2014
+++ src/sys/sys/ipi.h	Sun Jan 18 23:16:35 2015
@@ -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 @@ void	cpu_ipi(struct cpu_info *);
 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 *);