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 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 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 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