xref: /illumos-gate/usr/src/uts/i86pc/io/vmm/vmm_stat.c (revision 2606939d)
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
vmm_stat_register(void * arg)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
vmm_stat_copy(struct vm * vm,int vcpu,int * num_stats,uint64_t * buf)85 vmm_stat_copy(struct vm *vm, int vcpu, int *num_stats, uint64_t *buf)
86 {
87 	struct vmm_stat_type *vst;
88 	uint64_t *stats;
89 	int i;
90 
91 	if (vcpu < 0 || vcpu >= vm_get_maxcpus(vm))
92 		return (EINVAL);
93 
94 	/* Let stats functions update their counters */
95 	for (i = 0; i < vst_num_types; i++) {
96 		vst = vsttab[i];
97 		if (vst->func != NULL)
98 			(*vst->func)(vm, vcpu, vst);
99 	}
100 
101 	/* Copy over the stats */
102 	stats = vcpu_stats(vm, vcpu);
103 	for (i = 0; i < vst_num_elems; i++)
104 		buf[i] = stats[i];
105 	*num_stats = vst_num_elems;
106 	return (0);
107 }
108 
109 void *
vmm_stat_alloc(void)110 vmm_stat_alloc(void)
111 {
112 
113 	return (malloc(vst_size, M_VMM_STAT, M_WAITOK));
114 }
115 
116 void
vmm_stat_init(void * vp)117 vmm_stat_init(void *vp)
118 {
119 
120 	bzero(vp, vst_size);
121 }
122 
123 void
vmm_stat_free(void * vp)124 vmm_stat_free(void *vp)
125 {
126 	free(vp, M_VMM_STAT);
127 }
128 
129 int
vmm_stat_desc_copy(int index,char * buf,int bufsize)130 vmm_stat_desc_copy(int index, char *buf, int bufsize)
131 {
132 	int i;
133 	struct vmm_stat_type *vst;
134 
135 	for (i = 0; i < vst_num_types; i++) {
136 		vst = vsttab[i];
137 		if (index >= vst->index && index < vst->index + vst->nelems) {
138 			if (vst->nelems > 1) {
139 				snprintf(buf, bufsize, "%s[%d]",
140 				    vst->desc, index - vst->index);
141 			} else {
142 				strlcpy(buf, vst->desc, bufsize);
143 			}
144 			return (0);	/* found it */
145 		}
146 	}
147 
148 	return (EINVAL);
149 }
150 
151 /* global statistics */
152 VMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus");
153 VMM_STAT(VMEXIT_COUNT, "total number of vm exits");
154 VMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt");
155 VMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted");
156 VMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted");
157 VMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted");
158 VMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted");
159 VMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits");
160 VMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted");
161 VMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening");
162 VMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening");
163 VMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted");
164 VMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted");
165 VMM_STAT(VMEXIT_NESTED_FAULT, "vm exits due to nested page fault");
166 VMM_STAT(VMEXIT_MMIO_EMUL, "vm exits for mmio emulation");
167 VMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason");
168 VMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit");
169 VMM_STAT(VMEXIT_REQIDLE, "number of times idle requested at exit");
170 VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions");
171 VMM_STAT(VMEXIT_RUN_STATE, "number of vm exits due to run_state change");
172