1 /* $NetBSD: tprof_x86.c,v 1.2 2022/12/01 00:32:52 ryo Exp $ */
2
3 /*
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Maxime Villard.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: tprof_x86.c,v 1.2 2022/12/01 00:32:52 ryo Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/device.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40
41 #include <sys/cpu.h>
42
43 #include <dev/tprof/tprof.h>
44
45 #include <machine/cpufunc.h>
46 #include <machine/cputypes.h> /* CPUVENDOR_* */
47 #include <machine/cpuvar.h> /* cpu_vendor */
48
49 MODULE(MODULE_CLASS_DRIVER, tprof_x86, "tprof");
50
51 extern const tprof_backend_ops_t tprof_amd_ops;
52 extern const tprof_backend_ops_t tprof_intel_ops;
53
54 static int
tprof_x86_init(void)55 tprof_x86_init(void)
56 {
57 const tprof_backend_ops_t *ops;
58 const char *name;
59 int ncounters;
60
61 switch (cpu_vendor) {
62 case CPUVENDOR_AMD:
63 name = "tprof_amd";
64 ops = &tprof_amd_ops;
65 break;
66 case CPUVENDOR_INTEL:
67 name = "tprof_intel";
68 ops = &tprof_intel_ops;
69 break;
70 default:
71 return ENOTSUP;
72 }
73
74 ncounters = ops->tbo_ncounters();
75 if (ncounters == 0)
76 return ENOTSUP;
77
78 return tprof_backend_register(name, ops, TPROF_BACKEND_VERSION);
79 }
80
81 static int
tprof_x86_fini(void)82 tprof_x86_fini(void)
83 {
84 switch (cpu_vendor) {
85 case CPUVENDOR_AMD:
86 return tprof_backend_unregister("tprof_amd");
87 case CPUVENDOR_INTEL:
88 return tprof_backend_unregister("tprof_intel");
89 default:
90 return ENOTSUP;
91 }
92 }
93
94 static int
tprof_x86_modcmd(modcmd_t cmd,void * arg)95 tprof_x86_modcmd(modcmd_t cmd, void *arg)
96 {
97 switch (cmd) {
98 case MODULE_CMD_INIT:
99 return tprof_x86_init();
100 case MODULE_CMD_FINI:
101 return tprof_x86_fini();
102 default:
103 return ENOTTY;
104 }
105 }
106