c308b23b7a
via a software interrupt. This is safe to do because the logical processor is already cognizant of the NMI and further NMIs are blocked until the host's NMI handler executes "iret".
155 lines
4.7 KiB
C
155 lines
4.7 KiB
C
/*-
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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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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <sys/smp.h>
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#include <machine/vmm.h>
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#include "vmm_util.h"
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#include "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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void
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vmm_stat_init(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->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel())
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return;
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if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_amd())
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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 accomodate 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 vm *vm, int vcpu, int *num_stats, uint64_t *buf)
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{
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int i;
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uint64_t *stats;
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if (vcpu < 0 || vcpu >= VM_MAXCPU)
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return (EINVAL);
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stats = vcpu_stats(vm, vcpu);
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for (i = 0; i < vst_num_elems; i++)
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buf[i] = stats[i];
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*num_stats = vst_num_elems;
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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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u_long size;
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size = vst_num_elems * sizeof(uint64_t);
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return (malloc(size, M_VMM_STAT, M_ZERO | M_WAITOK));
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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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/* global statistics */
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VMM_STAT(VCPU_MIGRATIONS, "vcpu migration across host cpus");
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VMM_STAT(VMEXIT_COUNT, "total number of vm exits");
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VMM_STAT(VMEXIT_EXTINT, "vm exits due to external interrupt");
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VMM_STAT(VMEXIT_HLT, "number of times hlt was intercepted");
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VMM_STAT(VMEXIT_CR_ACCESS, "number of times %cr access was intercepted");
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VMM_STAT(VMEXIT_RDMSR, "number of times rdmsr was intercepted");
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VMM_STAT(VMEXIT_WRMSR, "number of times wrmsr was intercepted");
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VMM_STAT(VMEXIT_MTRAP, "number of monitor trap exits");
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VMM_STAT(VMEXIT_PAUSE, "number of times pause was intercepted");
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VMM_STAT(VMEXIT_INTR_WINDOW, "vm exits due to interrupt window opening");
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VMM_STAT(VMEXIT_NMI_WINDOW, "vm exits due to nmi window opening");
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VMM_STAT(VMEXIT_INOUT, "number of times in/out was intercepted");
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VMM_STAT(VMEXIT_CPUID, "number of times cpuid was intercepted");
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VMM_STAT(VMEXIT_EPT_FAULT, "vm exits due to nested page fault");
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VMM_STAT(VMEXIT_UNKNOWN, "number of vm exits for unknown reason");
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VMM_STAT(VMEXIT_ASTPENDING, "number of times astpending at exit");
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VMM_STAT(VMEXIT_USERSPACE, "number of vm exits handled in userspace");
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VMM_STAT(VMEXIT_RENDEZVOUS, "number of times rendezvous pending at exit");
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VMM_STAT(VMEXIT_EXCEPTION, "number of vm exits due to exceptions");
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