Home | History | Annotate | Line # | Download | only in tprof 
      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