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/*-
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/smp.h>
#include <machine/vmm.h>
#include "vmm_util.h"
#include "vmm_stat.h"
/*
* 'vst_num_elems' is the total number of addressable statistic elements
* 'vst_num_types' is the number of unique statistic types
*
* It is always true that 'vst_num_elems' is greater than or equal to
* 'vst_num_types'. This is because a stat type may represent more than
* one element (for e.g. VMM_STAT_ARRAY).
*/
static int vst_num_elems, vst_num_types;
static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS];
static MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat");
#define vst_size ((size_t)vst_num_elems * sizeof(uint64_t))
void
vmm_stat_register(void *arg)
{
struct vmm_stat_type *vst = arg;
/* We require all stats to identify themselves with a description */
if (vst->desc == NULL)
return;
if (vst->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel())
return;
if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_amd())
return;
if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) {
printf("Cannot accomodate vmm stat type \"%s\"!\n", vst->desc);
return;
}
vst->index = vst_num_elems;
vst_num_elems += vst->nelems;
vsttab[vst_num_types++] = vst;
}
int
vmm_stat_copy(struct vm *vm, int vcpu, int *num_stats, uint64_t *buf)
{
struct vmm_stat_type *vst;
uint64_t *stats;
int i;
if (vcpu < 0 || vcpu >= VM_MAXCPU)
return (EINVAL);
/* Let stats functions update their counters */
for (i = 0; i < vst_num_types; i++) {
vst = vsttab[i];
if (vst->func != NULL)
(*vst->func)(vm, vcpu, vst);
}
/* Copy over the stats */
stats = vcpu_stats(vm, vcpu);
for (i = 0; i < vst_num_elems; i++)
buf[i] = stats[i];
*num_stats = vst_num_elems;
return (0);
}
void *
vmm_stat_alloc(void)
{
return (malloc(vst_size, M_VMM_STAT, M_WAITOK));
}
void
vmm_stat_init(void *vp)
{
bzero(vp, vst_size);
}
void
vmm_stat_free(void *vp)
{
free(vp, M_VMM_STAT);
}
int
vmm_stat_desc_copy(int index, char *buf, int bufsize)
{
int i;
struct vmm_stat_type *vst;
for (i = 0; i < vst_num_types; i++) {
vst = vsttab[i];
if (index >= vst->index && index < vst->index + vst->nelems) {
if (vst->nelems > 1) {
snprintf(buf, bufsize, "%s[%d]",
vst->desc, index - vst->index);
} else {
strlcpy(buf, vst->desc, bufsize);
}
return (0); /* found it */
}
}
return (EINVAL);
}
/* global statistics */
VMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus");
VMM_STAT(VMEXIT_COUNT, "total number of vm exits");
VMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt");
VMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted");
VMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted");
VMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted");
VMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted");
VMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits");
VMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted");
VMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening");
VMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening");
VMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted");
VMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted");
VMM_STAT(VMEXIT_NESTED_FAULT, "vm exits due to nested page fault");
VMM_STAT(VMEXIT_INST_EMUL, "vm exits for instruction emulation");
VMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason");
VMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit");
VMM_STAT(VMEXIT_USERSPACE, "number of vm exits handled in userspace");
VMM_STAT(VMEXIT_RENDEZVOUS, "number of times rendezvous pending at exit");
VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions");
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