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 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34
35 #include <machine/vmm.h>
36 #include "vmm_util.h"
37 #include "vmm_stat.h"
38
39 /*
40 * 'vst_num_elems' is the total number of addressable statistic elements
41 * 'vst_num_types' is the number of unique statistic types
42 *
43 * It is always true that 'vst_num_elems' is greater than or equal to
44 * 'vst_num_types'. This is because a stat type may represent more than
45 * one element (for e.g. VMM_STAT_ARRAY).
46 */
47 static int vst_num_elems, vst_num_types;
48 static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS];
49
50 static MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat");
51
52 #define vst_size ((size_t)vst_num_elems * sizeof(uint64_t))
53
54 void
vmm_stat_register(void * arg)55 vmm_stat_register(void *arg)
56 {
57 struct vmm_stat_type *vst = arg;
58
59 /* We require all stats to identify themselves with a description */
60 if (vst->desc == NULL)
61 return;
62
63 if (vst->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel())
64 return;
65
66 if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_svm())
67 return;
68
69 if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) {
70 printf("Cannot accommodate vmm stat type \"%s\"!\n", vst->desc);
71 return;
72 }
73
74 vst->index = vst_num_elems;
75 vst_num_elems += vst->nelems;
76
77 vsttab[vst_num_types++] = vst;
78 }
79
80 int
vmm_stat_copy(struct vcpu * vcpu,int index,int count,int * num_stats,uint64_t * buf)81 vmm_stat_copy(struct vcpu *vcpu, int index, int count, int *num_stats,
82 uint64_t *buf)
83 {
84 struct vmm_stat_type *vst;
85 uint64_t *stats;
86 int i, tocopy;
87
88 if (index < 0 || count < 0)
89 return (EINVAL);
90
91 if (index > vst_num_elems)
92 return (ENOENT);
93
94 if (index == vst_num_elems) {
95 *num_stats = 0;
96 return (0);
97 }
98
99 tocopy = min(vst_num_elems - index, count);
100
101 /* Let stats functions update their counters */
102 for (i = 0; i < vst_num_types; i++) {
103 vst = vsttab[i];
104 if (vst->func != NULL)
105 (*vst->func)(vcpu, vst);
106 }
107
108 /* Copy over the stats */
109 stats = vcpu_stats(vcpu);
110 memcpy(buf, stats + index, tocopy * sizeof(stats[0]));
111 *num_stats = tocopy;
112 return (0);
113 }
114
115 void *
vmm_stat_alloc(void)116 vmm_stat_alloc(void)
117 {
118
119 return (malloc(vst_size, M_VMM_STAT, M_WAITOK));
120 }
121
122 void
vmm_stat_init(void * vp)123 vmm_stat_init(void *vp)
124 {
125
126 bzero(vp, vst_size);
127 }
128
129 void
vmm_stat_free(void * vp)130 vmm_stat_free(void *vp)
131 {
132 free(vp, M_VMM_STAT);
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 snprintf(buf, bufsize, "%s[%d]",
146 vst->desc, index - vst->index);
147 } else {
148 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_INST_EMUL, "vm exits for instruction 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_USERSPACE, "number of vm exits handled in userspace");
177 VMM_STAT(VMEXIT_RENDEZVOUS, "number of times rendezvous pending at exit");
178 VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions");
179