Add cpuset, an api for thread to cpu binding and cpu resource grouping

and assignment.
 - Add a reference to a struct cpuset in each thread that is inherited from
   the thread that created it.
 - Release the reference when the thread is destroyed.
 - Add prototypes for syscalls and macros for manipulating cpusets in
   sys/cpuset.h
 - Add syscalls to create, get, and set new numbered cpusets:
   cpuset(), cpuset_{get,set}id()
 - Add syscalls for getting and setting affinity masks for cpusets or
   individual threads: cpuid_{get,set}affinity()
 - Add types for the 'level' and 'which' parameters for the cpuset.  This
   will permit expansion of the api to cover cpu masks for other objects
   identifiable with an id_t integer.  For example, IRQs and Jails may be
   coming soon.
 - The root set 0 contains all valid cpus.  All thread initially belong to
   cpuset 1.  This permits migrating all threads off of certain cpus to
   reserve them for special applications.

Sponsored by:	Nokia
Discussed with:	arch, rwatson, brooks, davidxu, deischen
Reviewed by:	antoine

1 files changed, 13 insertions, 0 deletions

diff --git a/sys/kern/syscalls.master b/sys/kern/syscalls.master
index c22f99c..c31df8d 100644
--- a/sys/kern/syscalls.master
+++ b/sys/kern/syscalls.master
@@ -850,5 +850,18 @@
 482	AUE_SHMOPEN	STD	{ int shm_open(const char *path, int flags, \
 				    mode_t mode); }
 483	AUE_SHMUNLINK	STD	{ int shm_unlink(const char *path); }
+484	AUE_NULL	STD	{ int cpuset(cpusetid_t *setid); }
+485	AUE_NULL	STD	{ int cpuset_setid(cpuwhich_t which, id_t id, \
+				    cpusetid_t setid); }
+486	AUE_NULL	STD	{ int cpuset_getid(cpulevel_t level, \
+				    cpuwhich_t which, id_t id, \
+				    cpusetid_t *setid); }
+487	AUE_NULL	STD	{ int cpuset_getaffinity(cpulevel_t level, \
+				    cpuwhich_t which, id_t id, int cpusetsize, \
+				    long *mask); }
+488	AUE_NULL	STD	{ int cpuset_setaffinity(cpulevel_t level, \
+				    cpuwhich_t which, id_t id, int cpusetsize, \
+				    long *mask); }
+
 ; Please copy any additions and changes to the following compatability tables:
 ; sys/compat/freebsd32/syscalls.master