Module Name: src
Committed By: rmind
Date: Sun Jan 20 17:09:47 UTC 2013
Modified Files:
src/sys/rump/librump/rumpkern: emul.c
Log Message:
Provide xc_send_ipi() routine in RUMP, which is required for high-priority
xcall(9) mechanism. It is emulated using low-priority xcall(9).
To generate a diff of this commit:
cvs rdiff -u -r1.151 -r1.152 src/sys/rump/librump/rumpkern/emul.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/rump/librump/rumpkern/emul.c
diff -u src/sys/rump/librump/rumpkern/emul.c:1.151 src/sys/rump/librump/rumpkern/emul.c:1.152
--- src/sys/rump/librump/rumpkern/emul.c:1.151 Sat Oct 27 17:18:40 2012
+++ src/sys/rump/librump/rumpkern/emul.c Sun Jan 20 17:09:47 2013
@@ -1,4 +1,4 @@
-/* $NetBSD: emul.c,v 1.151 2012/10/27 17:18:40 chs Exp $ */
+/* $NetBSD: emul.c,v 1.152 2013/01/20 17:09:47 rmind Exp $ */
/*
* Copyright (c) 2007-2011 Antti Kantee. All Rights Reserved.
@@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: emul.c,v 1.151 2012/10/27 17:18:40 chs Exp $");
+__KERNEL_RCSID(0, "$NetBSD: emul.c,v 1.152 2013/01/20 17:09:47 rmind Exp $");
#include <sys/param.h>
#include <sys/null.h>
@@ -284,9 +284,32 @@ syscall_intern(struct proc *p)
void
xc_send_ipi(struct cpu_info *ci)
{
+ const struct cpu_info *curci = curcpu();
+ CPU_INFO_ITERATOR cii;
- /* I'll think about the implementation if this is ever used */
- panic("not implemented");
+ /*
+ * IPI are considered asynchronous, therefore no need to wait for
+ * unicast call delivery (nor the order of calls matters). Our LWP
+ * needs to be bound to the CPU, since xc_unicast(9) may block.
+ *
+ * WARNING: These must be low-priority calls, as this routine is
+ * used to emulate high-priority (XC_HIGHPRI) mechanism.
+ */
+
+ if (ci) {
+ KASSERT(curci != ci);
+ (void)xc_unicast(0, (xcfunc_t)xc_ipi_handler, NULL, NULL, ci);
+ return;
+ }
+
+ curlwp->l_pflag |= LP_BOUND;
+ for (CPU_INFO_FOREACH(cii, ci)) {
+ if (curci == ci) {
+ continue;
+ }
+ (void)xc_unicast(0, (xcfunc_t)xc_ipi_handler, NULL, NULL, ci);
+ }
+ curlwp->l_pflag &= ~LP_BOUND;
}
int
