1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/systm.h> 37 #include <sys/malloc.h> 38 39 #include <machine/vmm.h> 40 #include "vmm_util.h" 41 #include "vmm_stat.h" 42 43 /* 44 * 'vst_num_elems' is the total number of addressable statistic elements 45 * 'vst_num_types' is the number of unique statistic types 46 * 47 * It is always true that 'vst_num_elems' is greater than or equal to 48 * 'vst_num_types'. This is because a stat type may represent more than 49 * one element (for e.g. VMM_STAT_ARRAY). 50 */ 51 static int vst_num_elems, vst_num_types; 52 static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS]; 53 54 static MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat"); 55 56 #define vst_size ((size_t)vst_num_elems * sizeof(uint64_t)) 57 58 void 59 vmm_stat_register(void *arg) 60 { 61 struct vmm_stat_type *vst = arg; 62 63 /* We require all stats to identify themselves with a description */ 64 if (vst->desc == NULL) 65 return; 66 67 if (vst->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel()) 68 return; 69 70 if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_svm()) 71 return; 72 73 if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) { 74 printf("Cannot accommodate vmm stat type \"%s\"!\n", vst->desc); 75 return; 76 } 77 78 vst->index = vst_num_elems; 79 vst_num_elems += vst->nelems; 80 81 vsttab[vst_num_types++] = vst; 82 } 83 84 int 85 vmm_stat_copy(struct vm *vm, int vcpu, int index, int count, int *num_stats, 86 uint64_t *buf) 87 { 88 struct vmm_stat_type *vst; 89 uint64_t *stats; 90 int i, tocopy; 91 92 if (vcpu < 0 || vcpu >= vm_get_maxcpus(vm)) 93 return (EINVAL); 94 95 if (index < 0 || count < 0) 96 return (EINVAL); 97 98 if (index > vst_num_elems) 99 return (ENOENT); 100 101 if (index == vst_num_elems) { 102 *num_stats = 0; 103 return (0); 104 } 105 106 tocopy = min(vst_num_elems - index, count); 107 108 /* Let stats functions update their counters */ 109 for (i = 0; i < vst_num_types; i++) { 110 vst = vsttab[i]; 111 if (vst->func != NULL) 112 (*vst->func)(vm, vcpu, vst); 113 } 114 115 /* Copy over the stats */ 116 stats = vcpu_stats(vm, vcpu); 117 memcpy(buf, stats + index, tocopy * sizeof(stats[0])); 118 *num_stats = tocopy; 119 return (0); 120 } 121 122 void * 123 vmm_stat_alloc(void) 124 { 125 126 return (malloc(vst_size, M_VMM_STAT, M_WAITOK)); 127 } 128 129 void 130 vmm_stat_init(void *vp) 131 { 132 133 bzero(vp, vst_size); 134 } 135 136 void 137 vmm_stat_free(void *vp) 138 { 139 free(vp, M_VMM_STAT); 140 } 141 142 int 143 vmm_stat_desc_copy(int index, char *buf, int bufsize) 144 { 145 int i; 146 struct vmm_stat_type *vst; 147 148 for (i = 0; i < vst_num_types; i++) { 149 vst = vsttab[i]; 150 if (index >= vst->index && index < vst->index + vst->nelems) { 151 if (vst->nelems > 1) { 152 snprintf(buf, bufsize, "%s[%d]", 153 vst->desc, index - vst->index); 154 } else { 155 strlcpy(buf, vst->desc, bufsize); 156 } 157 return (0); /* found it */ 158 } 159 } 160 161 return (EINVAL); 162 } 163 164 /* global statistics */ 165 VMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus"); 166 VMM_STAT(VMEXIT_COUNT, "total number of vm exits"); 167 VMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt"); 168 VMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted"); 169 VMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted"); 170 VMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted"); 171 VMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted"); 172 VMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits"); 173 VMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted"); 174 VMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening"); 175 VMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening"); 176 VMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted"); 177 VMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted"); 178 VMM_STAT(VMEXIT_NESTED_FAULT, "vm exits due to nested page fault"); 179 VMM_STAT(VMEXIT_INST_EMUL, "vm exits for instruction emulation"); 180 VMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason"); 181 VMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit"); 182 VMM_STAT(VMEXIT_REQIDLE, "number of times idle requested at exit"); 183 VMM_STAT(VMEXIT_USERSPACE, "number of vm exits handled in userspace"); 184 VMM_STAT(VMEXIT_RENDEZVOUS, "number of times rendezvous pending at exit"); 185 VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions"); 186