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