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93e81baa1c
There is a small difference between the arm64 and amd64 implementations: the latter makes use of a "scope" to exclude AMD-specific stats on Intel systems and vice-versa. Replace this with a more generic predicate callback which can be used for the same purpose. No functional change intended. Reviewed by: corvink, jhb Differential Revision: https://reviews.freebsd.org/D46430
151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <machine/vmm.h>
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#include <dev/vmm/vmm_stat.h>
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/*
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* 'vst_num_elems' is the total number of addressable statistic elements
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* 'vst_num_types' is the number of unique statistic types
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*
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* It is always true that 'vst_num_elems' is greater than or equal to
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* 'vst_num_types'. This is because a stat type may represent more than
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* one element (for e.g. VMM_STAT_ARRAY).
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*/
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static int vst_num_elems, vst_num_types;
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static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS];
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static MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat");
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#define vst_size ((size_t)vst_num_elems * sizeof(uint64_t))
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void
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vmm_stat_register(void *arg)
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{
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struct vmm_stat_type *vst = arg;
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/* We require all stats to identify themselves with a description */
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if (vst->desc == NULL)
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return;
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if (vst->pred != NULL && !vst->pred())
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return;
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if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) {
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printf("Cannot accommodate vmm stat type \"%s\"!\n", vst->desc);
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return;
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}
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vst->index = vst_num_elems;
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vst_num_elems += vst->nelems;
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vsttab[vst_num_types++] = vst;
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}
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int
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vmm_stat_copy(struct vcpu *vcpu, int index, int count, int *num_stats,
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uint64_t *buf)
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{
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struct vmm_stat_type *vst;
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uint64_t *stats;
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int i, tocopy;
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if (index < 0 || count < 0)
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return (EINVAL);
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if (index > vst_num_elems)
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return (ENOENT);
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if (index == vst_num_elems) {
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*num_stats = 0;
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return (0);
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}
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tocopy = min(vst_num_elems - index, count);
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/* Let stats functions update their counters */
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for (i = 0; i < vst_num_types; i++) {
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vst = vsttab[i];
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if (vst->func != NULL)
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(*vst->func)(vcpu, vst);
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}
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/* Copy over the stats */
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stats = vcpu_stats(vcpu);
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memcpy(buf, stats + index, tocopy * sizeof(stats[0]));
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*num_stats = tocopy;
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return (0);
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}
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void *
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vmm_stat_alloc(void)
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{
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return (malloc(vst_size, M_VMM_STAT, M_WAITOK));
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}
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void
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vmm_stat_init(void *vp)
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{
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bzero(vp, vst_size);
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}
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void
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vmm_stat_free(void *vp)
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{
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free(vp, M_VMM_STAT);
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}
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int
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vmm_stat_desc_copy(int index, char *buf, int bufsize)
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{
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int i;
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struct vmm_stat_type *vst;
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for (i = 0; i < vst_num_types; i++) {
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vst = vsttab[i];
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if (index >= vst->index && index < vst->index + vst->nelems) {
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if (vst->nelems > 1) {
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snprintf(buf, bufsize, "%s[%d]",
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vst->desc, index - vst->index);
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} else {
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strlcpy(buf, vst->desc, bufsize);
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}
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return (0); /* found it */
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}
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}
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return (EINVAL);
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}
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