1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29 #include <sys/cdefs.h>
30
31 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/systm.h>
34 #include <sys/kmem.h>
35
36 #include <machine/vmm.h>
37 #include "vmm_util.h"
38 #include "vmm_stat.h"
39
40 /*
41 * 'vst_num_elems' is the total number of addressable statistic elements
42 * 'vst_num_types' is the number of unique statistic types
43 *
44 * It is always true that 'vst_num_elems' is greater than or equal to
45 * 'vst_num_types'. This is because a stat type may represent more than
46 * one element (for e.g. VMM_STAT_ARRAY).
47 */
48 static int vst_num_elems, vst_num_types;
49 static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS];
50
51 #define vst_size ((size_t)vst_num_elems * sizeof (uint64_t))
52
53 void
vmm_stat_register(void * arg)54 vmm_stat_register(void *arg)
55 {
56 struct vmm_stat_type *vst = arg;
57
58 /* We require all stats to identify themselves with a description */
59 if (vst->desc == NULL)
60 return;
61
62 if (vst->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel())
63 return;
64
65 if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_svm())
66 return;
67
68 if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) {
69 printf("Cannot accommodate vmm stat type \"%s\"!\n", vst->desc);
70 return;
71 }
72
73 vst->index = vst_num_elems;
74 vst_num_elems += vst->nelems;
75
76 vsttab[vst_num_types++] = vst;
77 }
78
79 int
vmm_stat_copy(struct vm * vm,int vcpu,int index,int count,int * num_stats,uint64_t * buf)80 vmm_stat_copy(struct vm *vm, int vcpu, int index, int count, int *num_stats,
81 uint64_t *buf)
82 {
83 struct vmm_stat_type *vst;
84 uint64_t *stats;
85 int i, tocopy;
86
87 if (vcpu < 0 || vcpu >= vm_get_maxcpus(vm))
88 return (EINVAL);
89
90 if (index < 0 || count < 0)
91 return (EINVAL);
92
93 if (index > vst_num_elems)
94 return (ENOENT);
95
96 if (index == vst_num_elems) {
97 *num_stats = 0;
98 return (0);
99 }
100
101 tocopy = min(vst_num_elems - index, count);
102
103 /* Let stats functions update their counters */
104 for (i = 0; i < vst_num_types; i++) {
105 vst = vsttab[i];
106 if (vst->func != NULL)
107 (*vst->func)(vm, vcpu, vst);
108 }
109
110 /* Copy over the stats */
111 stats = vcpu_stats(vm, vcpu);
112 memcpy(buf, stats + index, tocopy * sizeof (stats[0]));
113 *num_stats = tocopy;
114 return (0);
115 }
116
117 void *
vmm_stat_alloc(void)118 vmm_stat_alloc(void)
119 {
120 return (kmem_alloc(vst_size, KM_SLEEP));
121 }
122
123 void
vmm_stat_init(void * vp)124 vmm_stat_init(void *vp)
125 {
126 bzero(vp, vst_size);
127 }
128
129 void
vmm_stat_free(void * vp)130 vmm_stat_free(void *vp)
131 {
132 kmem_free(vp, vst_size);
133 }
134
135 int
vmm_stat_desc_copy(int index,char * buf,int bufsize)136 vmm_stat_desc_copy(int index, char *buf, int bufsize)
137 {
138 int i;
139 struct vmm_stat_type *vst;
140
141 for (i = 0; i < vst_num_types; i++) {
142 vst = vsttab[i];
143 if (index >= vst->index && index < vst->index + vst->nelems) {
144 if (vst->nelems > 1) {
145 (void) snprintf(buf, bufsize, "%s[%d]",
146 vst->desc, index - vst->index);
147 } else {
148 (void) strlcpy(buf, vst->desc, bufsize);
149 }
150 return (0); /* found it */
151 }
152 }
153
154 return (EINVAL);
155 }
156
157 /* global statistics */
158 VMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus");
159 VMM_STAT(VMEXIT_COUNT, "total number of vm exits");
160 VMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt");
161 VMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted");
162 VMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted");
163 VMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted");
164 VMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted");
165 VMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits");
166 VMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted");
167 VMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening");
168 VMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening");
169 VMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted");
170 VMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted");
171 VMM_STAT(VMEXIT_NESTED_FAULT, "vm exits due to nested page fault");
172 VMM_STAT(VMEXIT_MMIO_EMUL, "vm exits for mmio emulation");
173 VMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason");
174 VMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit");
175 VMM_STAT(VMEXIT_REQIDLE, "number of times idle requested at exit");
176 VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions");
177 VMM_STAT(VMEXIT_RUN_STATE, "number of vm exits due to run_state change");
178