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 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * FILE NOTICE BEGIN
29 *
30 * This file should not be modified. If you wish to modify it or have it
31 * modified, please contact Sun Microsystems at <LFI149367@-sun-.-com->
32 * (without anti-spam dashes)
33 *
34 * FILE NOTICE END
35 */
36
37 #pragma ident "%Z%%M% %I% %E% SMI"
38
39 #include <sys/cpuvar.h>
40 #include <sys/stack.h>
41 #include <vm/seg_kp.h>
42 #include <sys/proc.h>
43 #include <sys/pset.h>
44 #include <sys/sysmacros.h>
45
46 /*
47 * Create and initialize an interrupt thread.
48 */
49 static void
50 thread_create_intr(cpu_t *cp)
51 {
52 kthread_t *tp;
53
54 tp = thread_create(NULL, 0,
55 (void (*)())thread_create_intr, NULL, 0, &p0, TS_ONPROC, 0);
56
57 /*
58 * Set the thread in the TS_FREE state. The state will change
59 * to TS_ONPROC only while the interrupt is active. Think of these
60 * as being on a private free list for the CPU. Being TS_FREE keeps
61 * inactive interrupt threads out of debugger thread lists.
62 *
63 * We cannot call thread_create with TS_FREE because of the current
64 * checks there for ONPROC. Fix this when thread_create takes flags.
65 */
66 THREAD_FREEINTR(tp, cp);
67
68 /*
69 * Nobody should ever reference the credentials of an interrupt
70 * thread so make it NULL to catch any such references.
71 */
72 tp->t_cred = NULL;
73 tp->t_flag |= T_INTR_THREAD;
74 tp->t_cpu = cp;
80 /*
81 * Don't make a user-requested binding on this thread so that
82 * the processor can be offlined.
83 */
84 tp->t_bind_cpu = PBIND_NONE; /* no USER-requested binding */
85 tp->t_bind_pset = PS_NONE;
86
87 #if defined(__i386) || defined(__amd64)
88 tp->t_stk -= STACK_ALIGN;
89 *(tp->t_stk) = 0; /* terminate intr thread stack */
90 #endif
91
92 /*
93 * Link onto CPU's interrupt pool.
94 */
95 tp->t_link = cp->cpu_intr_thread;
96 cp->cpu_intr_thread = tp;
97 }
98
99 /*
100 * Allocate a given number of interrupt threads for a given CPU.
101 * These threads will get freed by cpu_destroy_bound_threads()
102 * when CPU gets unconfigured.
103 */
104 void
105 cpu_intr_alloc(cpu_t *cp, int n)
106 {
107 int i;
108
109 for (i = 0; i < n; i++)
110 thread_create_intr(cp);
111
112 cp->cpu_intr_stack = (caddr_t)segkp_get(segkp, INTR_STACK_SIZE,
113 KPD_HASREDZONE | KPD_NO_ANON | KPD_LOCKED) +
114 INTR_STACK_SIZE - SA(MINFRAME);
115 }
|
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 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26 /*
27 * Copyright 2015, Joyent, Inc.
28 */
29
30 #include <sys/cpuvar.h>
31 #include <sys/stack.h>
32 #include <vm/seg_kp.h>
33 #include <sys/proc.h>
34 #include <sys/pset.h>
35 #include <sys/sysmacros.h>
36
37 /*
38 * Use a slightly larger thread stack size for interrupt threads rather than the
39 * default. This is useful for cases where the networking stack may do an rx and
40 * a tx in the context of a single interrupt and when combined with various
41 * promisc hooks that need memory, can cause us to get dangerously close to the
42 * edge of the traditional stack sizes. This is only a few pages more than a
43 * traditional stack and given that we don't have that many interrupt threads,
44 * the memory costs end up being more than worthwhile.
45 */
46 #define LL_INTR_STKSZ (32 * 1024)
47
48 /*
49 * Create and initialize an interrupt thread.
50 */
51 static void
52 thread_create_intr(cpu_t *cp)
53 {
54 kthread_t *tp;
55
56 tp = thread_create(NULL, LL_INTR_STKSZ,
57 (void (*)())thread_create_intr, NULL, 0, &p0, TS_ONPROC, 0);
58
59 /*
60 * Set the thread in the TS_FREE state. The state will change
61 * to TS_ONPROC only while the interrupt is active. Think of these
62 * as being on a private free list for the CPU. Being TS_FREE keeps
63 * inactive interrupt threads out of debugger thread lists.
64 *
65 * We cannot call thread_create with TS_FREE because of the current
66 * checks there for ONPROC. Fix this when thread_create takes flags.
67 */
68 THREAD_FREEINTR(tp, cp);
69
70 /*
71 * Nobody should ever reference the credentials of an interrupt
72 * thread so make it NULL to catch any such references.
73 */
74 tp->t_cred = NULL;
75 tp->t_flag |= T_INTR_THREAD;
76 tp->t_cpu = cp;
82 /*
83 * Don't make a user-requested binding on this thread so that
84 * the processor can be offlined.
85 */
86 tp->t_bind_cpu = PBIND_NONE; /* no USER-requested binding */
87 tp->t_bind_pset = PS_NONE;
88
89 #if defined(__i386) || defined(__amd64)
90 tp->t_stk -= STACK_ALIGN;
91 *(tp->t_stk) = 0; /* terminate intr thread stack */
92 #endif
93
94 /*
95 * Link onto CPU's interrupt pool.
96 */
97 tp->t_link = cp->cpu_intr_thread;
98 cp->cpu_intr_thread = tp;
99 }
100
101 /*
102 * Allocate a given number of interrupt threads for a given CPU. These threads
103 * will get freed by cpu_destroy_bound_threads() when CPU gets unconfigured.
104 *
105 * Note, high level interrupts are always serviced using cpu_intr_stack and are
106 * not allowed to block. Low level interrupts or soft-interrupts use the
107 * kthread_t's that we create through the calls to thread_create_intr().
108 */
109 void
110 cpu_intr_alloc(cpu_t *cp, int n)
111 {
112 int i;
113
114 for (i = 0; i < n; i++)
115 thread_create_intr(cp);
116
117 cp->cpu_intr_stack = (caddr_t)segkp_get(segkp, INTR_STACK_SIZE,
118 KPD_HASREDZONE | KPD_NO_ANON | KPD_LOCKED) +
119 INTR_STACK_SIZE - SA(MINFRAME);
120 }
|