| subr_smp.c (261520) | subr_smp.c (264984) |
|---|---|
| 1/*- 2 * Copyright (c) 2001, John Baldwin <jhb@FreeBSD.org>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 */ 26 27/* 28 * This module holds the global variables and machine independent functions 29 * used for the kernel SMP support. 30 */ 31 32#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2001, John Baldwin <jhb@FreeBSD.org>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 */ 26 27/* 28 * This module holds the global variables and machine independent functions 29 * used for the kernel SMP support. 30 */ 31 32#include <sys/cdefs.h> |
| 33__FBSDID("$FreeBSD: head/sys/kern/subr_smp.c 261520 2014-02-05 18:13:27Z jhb $"); | 33__FBSDID("$FreeBSD: head/sys/kern/subr_smp.c 264984 2014-04-26 20:27:54Z scottl $"); |
| 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/ktr.h> 39#include <sys/proc.h> 40#include <sys/bus.h> 41#include <sys/lock.h> --- 12 unchanged lines hidden (view full) --- 54volatile cpuset_t stopped_cpus; 55volatile cpuset_t started_cpus; 56volatile cpuset_t suspended_cpus; 57cpuset_t hlt_cpus_mask; 58cpuset_t logical_cpus_mask; 59 60void (*cpustop_restartfunc)(void); 61#endif | 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/ktr.h> 39#include <sys/proc.h> 40#include <sys/bus.h> 41#include <sys/lock.h> --- 12 unchanged lines hidden (view full) --- 54volatile cpuset_t stopped_cpus; 55volatile cpuset_t started_cpus; 56volatile cpuset_t suspended_cpus; 57cpuset_t hlt_cpus_mask; 58cpuset_t logical_cpus_mask; 59 60void (*cpustop_restartfunc)(void); 61#endif |
| 62 63static int sysctl_kern_smp_active(SYSCTL_HANDLER_ARGS); 64 |
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| 62/* This is used in modules that need to work in both SMP and UP. */ 63cpuset_t all_cpus; 64 65int mp_ncpus; 66/* export this for libkvm consumers. */ 67int mp_maxcpus = MAXCPU; 68 69volatile int smp_started; 70u_int mp_maxid; 71 72static SYSCTL_NODE(_kern, OID_AUTO, smp, CTLFLAG_RD|CTLFLAG_CAPRD, NULL, 73 "Kernel SMP"); 74 75SYSCTL_INT(_kern_smp, OID_AUTO, maxid, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxid, 0, 76 "Max CPU ID."); 77 78SYSCTL_INT(_kern_smp, OID_AUTO, maxcpus, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxcpus, 79 0, "Max number of CPUs that the system was compiled for."); 80 | 65/* This is used in modules that need to work in both SMP and UP. */ 66cpuset_t all_cpus; 67 68int mp_ncpus; 69/* export this for libkvm consumers. */ 70int mp_maxcpus = MAXCPU; 71 72volatile int smp_started; 73u_int mp_maxid; 74 75static SYSCTL_NODE(_kern, OID_AUTO, smp, CTLFLAG_RD|CTLFLAG_CAPRD, NULL, 76 "Kernel SMP"); 77 78SYSCTL_INT(_kern_smp, OID_AUTO, maxid, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxid, 0, 79 "Max CPU ID."); 80 81SYSCTL_INT(_kern_smp, OID_AUTO, maxcpus, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxcpus, 82 0, "Max number of CPUs that the system was compiled for."); 83 |
| 81int smp_active = 0; /* are the APs allowed to run? */ 82SYSCTL_INT(_kern_smp, OID_AUTO, active, CTLFLAG_RW, &smp_active, 0, 83 "Number of Auxillary Processors (APs) that were successfully started"); | 84SYSCTL_PROC(_kern_smp, OID_AUTO, active, CTLFLAG_RD | CTLTYPE_INT, NULL, 0, 85 sysctl_kern_smp_active, "I", "Indicates system is running in SMP mode"); |
| 84 85int smp_disabled = 0; /* has smp been disabled? */ 86SYSCTL_INT(_kern_smp, OID_AUTO, disabled, CTLFLAG_RDTUN|CTLFLAG_CAPRD, 87 &smp_disabled, 0, "SMP has been disabled from the loader"); 88TUNABLE_INT("kern.smp.disabled", &smp_disabled); 89 90int smp_cpus = 1; /* how many cpu's running */ 91SYSCTL_INT(_kern_smp, OID_AUTO, cpus, CTLFLAG_RD|CTLFLAG_CAPRD, &smp_cpus, 0, --- 734 unchanged lines hidden (view full) --- 826} 827 828int 829quiesce_all_cpus(const char *wmesg, int prio) 830{ 831 832 return quiesce_cpus(all_cpus, wmesg, prio); 833} | 86 87int smp_disabled = 0; /* has smp been disabled? */ 88SYSCTL_INT(_kern_smp, OID_AUTO, disabled, CTLFLAG_RDTUN|CTLFLAG_CAPRD, 89 &smp_disabled, 0, "SMP has been disabled from the loader"); 90TUNABLE_INT("kern.smp.disabled", &smp_disabled); 91 92int smp_cpus = 1; /* how many cpu's running */ 93SYSCTL_INT(_kern_smp, OID_AUTO, cpus, CTLFLAG_RD|CTLFLAG_CAPRD, &smp_cpus, 0, --- 734 unchanged lines hidden (view full) --- 828} 829 830int 831quiesce_all_cpus(const char *wmesg, int prio) 832{ 833 834 return quiesce_cpus(all_cpus, wmesg, prio); 835} |
| 836 837/* Extra care is taken with this sysctl because the data type is volatile */ 838static int 839sysctl_kern_smp_active(SYSCTL_HANDLER_ARGS) 840{ 841 int error, active; 842 843 active = smp_started; 844 error = SYSCTL_OUT(req, &active, sizeof(active)); 845 return (error); 846} 847 |
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