5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  * Copyright 2016 Joyent, Inc.
  26  */
  27 
  28 #include <sys/types.h>
  29 #include <sys/systm.h>
  30 #include <sys/schedctl.h>
  31 #include <sys/proc.h>
  32 #include <sys/thread.h>
  33 #include <sys/class.h>
  34 #include <sys/cred.h>
  35 #include <sys/kmem.h>
  36 #include <sys/cmn_err.h>
  37 #include <sys/stack.h>
  38 #include <sys/debug.h>
  39 #include <sys/cpuvar.h>
  40 #include <sys/sobject.h>
  41 #include <sys/door.h>
  42 #include <sys/modctl.h>
  43 #include <sys/syscall.h>
  44 #include <sys/sysmacros.h>
  45 #include <sys/vmsystm.h>

  96  * System call interface to scheduler activations.
  97  * This always operates on the current lwp.
  98  */
  99 caddr_t
 100 schedctl(void)
 101 {
 102         kthread_t       *t = curthread;
 103         sc_shared_t     *ssp;
 104         uintptr_t       uaddr;
 105         int             error;
 106 
 107         if (t->t_schedctl == NULL) {
 108                 /*
 109                  * Allocate and initialize the shared structure.
 110                  */
 111                 if ((error = schedctl_shared_alloc(&ssp, &uaddr)) != 0)
 112                         return ((caddr_t)(uintptr_t)set_errno(error));
 113                 bzero(ssp, sizeof (*ssp));
 114 
 115                 installctx(t, ssp, schedctl_save, schedctl_restore,
 116                     schedctl_fork, NULL, NULL, NULL);
 117 
 118                 thread_lock(t); /* protect against ts_tick and ts_update */
 119                 t->t_schedctl = ssp;
 120                 t->t_sc_uaddr = uaddr;
 121                 ssp->sc_cid = t->t_cid;
 122                 ssp->sc_cpri = t->t_cpri;
 123                 ssp->sc_priority = DISP_PRIO(t);
 124                 thread_unlock(t);
 125         }
 126 
 127         return ((caddr_t)t->t_sc_uaddr);
 128 }
 129 
 130 
 131 /*
 132  * Clean up scheduler activations state associated with an exiting
 133  * (or execing) lwp.  t is always the current thread.
 134  */
 135 void
 136 schedctl_lwp_cleanup(kthread_t *t)

   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  * Copyright 2021 Joyent, Inc.
  26  */
  27 
  28 #include <sys/types.h>
  29 #include <sys/systm.h>
  30 #include <sys/schedctl.h>
  31 #include <sys/proc.h>
  32 #include <sys/thread.h>
  33 #include <sys/class.h>
  34 #include <sys/cred.h>
  35 #include <sys/kmem.h>
  36 #include <sys/cmn_err.h>
  37 #include <sys/stack.h>
  38 #include <sys/debug.h>
  39 #include <sys/cpuvar.h>
  40 #include <sys/sobject.h>
  41 #include <sys/door.h>
  42 #include <sys/modctl.h>
  43 #include <sys/syscall.h>
  44 #include <sys/sysmacros.h>
  45 #include <sys/vmsystm.h>

  96  * System call interface to scheduler activations.
  97  * This always operates on the current lwp.
  98  */
  99 caddr_t
 100 schedctl(void)
 101 {
 102         kthread_t       *t = curthread;
 103         sc_shared_t     *ssp;
 104         uintptr_t       uaddr;
 105         int             error;
 106 
 107         if (t->t_schedctl == NULL) {
 108                 /*
 109                  * Allocate and initialize the shared structure.
 110                  */
 111                 if ((error = schedctl_shared_alloc(&ssp, &uaddr)) != 0)
 112                         return ((caddr_t)(uintptr_t)set_errno(error));
 113                 bzero(ssp, sizeof (*ssp));
 114 
 115                 installctx(t, ssp, schedctl_save, schedctl_restore,
 116                     schedctl_fork, NULL, NULL, NULL, NULL);
 117 
 118                 thread_lock(t); /* protect against ts_tick and ts_update */
 119                 t->t_schedctl = ssp;
 120                 t->t_sc_uaddr = uaddr;
 121                 ssp->sc_cid = t->t_cid;
 122                 ssp->sc_cpri = t->t_cpri;
 123                 ssp->sc_priority = DISP_PRIO(t);
 124                 thread_unlock(t);
 125         }
 126 
 127         return ((caddr_t)t->t_sc_uaddr);
 128 }
 129 
 130 
 131 /*
 132  * Clean up scheduler activations state associated with an exiting
 133  * (or execing) lwp.  t is always the current thread.
 134  */
 135 void
 136 schedctl_lwp_cleanup(kthread_t *t)