svn commit: r279468 - head/sys/x86/include
Neel Natu
neel at FreeBSD.org
Sun Mar 1 02:31:28 UTC 2015
Author: neel
Date: Sun Mar 1 02:31:27 2015
New Revision: 279468
URL: https://svnweb.freebsd.org/changeset/base/279468
Log:
Free up the IPI slot used by IPI_STOP_HARD.
Change the numeric value of IPI_STOP_HARD so it doesn't occupy a valid IPI
slot. This can be done because IPI_STOP_HARD is actually delivered via NMI.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D1983
Modified:
head/sys/x86/include/apicvar.h
Modified: head/sys/x86/include/apicvar.h
==============================================================================
--- head/sys/x86/include/apicvar.h Sun Mar 1 01:08:14 2015 (r279467)
+++ head/sys/x86/include/apicvar.h Sun Mar 1 02:31:27 2015 (r279468)
@@ -126,7 +126,12 @@
#define IPI_STOP (APIC_IPI_INTS + 7) /* Stop CPU until restarted. */
#define IPI_SUSPEND (APIC_IPI_INTS + 8) /* Suspend CPU until restarted. */
-#define IPI_STOP_HARD (APIC_IPI_INTS + 9) /* Stop CPU with a NMI. */
+
+/*
+ * IPI_STOP_HARD does not need to occupy a slot in the IPI vector space since
+ * it is delivered using an NMI anyways.
+ */
+#define IPI_STOP_HARD 255 /* Stop CPU with a NMI. */
/*
* The spurious interrupt can share the priority class with the IPIs since
More information about the svn-src-all
mailing list