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: stable/11/sys/amd64/vmm/vmm_stat.c 348271 2019-05-25 11:27:56Z rgrimes $
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/sys/amd64/vmm/vmm_stat.c 348271 2019-05-25 11:27:56Z rgrimes $");
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 */
49static int vst_num_elems, vst_num_types;
50static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS];
51
52static MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat");
53
54#define	vst_size	((size_t)vst_num_elems * sizeof(uint64_t))
55
56void
57vmm_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
82int
83vmm_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_get_maxcpus(vm))
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
107void *
108vmm_stat_alloc(void)
109{
110
111	return (malloc(vst_size, M_VMM_STAT, M_WAITOK));
112}
113
114void
115vmm_stat_init(void *vp)
116{
117
118	bzero(vp, vst_size);
119}
120
121void
122vmm_stat_free(void *vp)
123{
124	free(vp, M_VMM_STAT);
125}
126
127int
128vmm_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 */
150VMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus");
151VMM_STAT(VMEXIT_COUNT, "total number of vm exits");
152VMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt");
153VMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted");
154VMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted");
155VMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted");
156VMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted");
157VMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits");
158VMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted");
159VMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening");
160VMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening");
161VMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted");
162VMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted");
163VMM_STAT(VMEXIT_NESTED_FAULT, "vm exits due to nested page fault");
164VMM_STAT(VMEXIT_INST_EMUL, "vm exits for instruction emulation");
165VMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason");
166VMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit");
167VMM_STAT(VMEXIT_REQIDLE, "number of times idle requested at exit");
168VMM_STAT(VMEXIT_USERSPACE, "number of vm exits handled in userspace");
169VMM_STAT(VMEXIT_RENDEZVOUS, "number of times rendezvous pending at exit");
170VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions");
171