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: releng/11.0/sys/amd64/vmm/vmm_stat.c 299009 2016-05-03 22:07:18Z pfg $
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.0/sys/amd64/vmm/vmm_stat.c 299009 2016-05-03 22:07:18Z pfg $");
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 accommodate 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");
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