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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS 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.
*/
#ifndef _DEV_VMM_STAT_H_
#define _DEV_VMM_STAT_H_
#include <dev/vmm/vmm_vm.h>
struct vm;
#define MAX_VMM_STAT_ELEMS 64 /* arbitrary */
struct vmm_stat_type;
typedef void (*vmm_stat_func_t)(struct vcpu *vcpu,
struct vmm_stat_type *stat);
typedef bool (*vmm_stat_func_pred_t)(void);
struct vmm_stat_type {
int index; /* position in the stats buffer */
int nelems; /* standalone or array */
const char *desc; /* description of statistic */
vmm_stat_func_t func;
vmm_stat_func_pred_t pred; /* predicate to check during registration */
};
void vmm_stat_register(void *arg);
#define VMM_STAT_FDEFINE(type, _nelems, _desc, _func, _pred) \
struct vmm_stat_type type[1] = { \
{ \
.index = -1, \
.nelems = _nelems, \
.desc = _desc, \
.func = _func, \
.pred = _pred, \
} \
}; \
SYSINIT(type##_stat, SI_SUB_KLD, SI_ORDER_ANY, vmm_stat_register, type)
#define VMM_STAT_DEFINE(type, nelems, desc, pred) \
VMM_STAT_FDEFINE(type, nelems, desc, NULL, pred)
#define VMM_STAT_DECLARE(type) \
extern struct vmm_stat_type type[1]
#define VMM_STAT(type, desc) \
VMM_STAT_DEFINE(type, 1, desc, NULL)
#define VMM_STAT_FUNC(type, desc, func) \
VMM_STAT_FDEFINE(type, 1, desc, func, NULL)
#define VMM_STAT_ARRAY(type, nelems, desc) \
VMM_STAT_DEFINE(type, nelems, desc, NULL)
void *vmm_stat_alloc(void);
void vmm_stat_init(void *vp);
void vmm_stat_free(void *vp);
int vmm_stat_copy(struct vcpu *vcpu, int index, int count,
int *num_stats, uint64_t *buf);
int vmm_stat_desc_copy(int index, char *buf, int buflen);
static void __inline
vmm_stat_array_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx,
uint64_t x)
{
#ifdef VMM_KEEP_STATS
uint64_t *stats;
stats = vcpu_stats(vcpu);
if (vst->index >= 0 && statidx < vst->nelems)
stats[vst->index + statidx] += x;
#endif
}
static void __inline
vmm_stat_array_set(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx,
uint64_t val)
{
#ifdef VMM_KEEP_STATS
uint64_t *stats;
stats = vcpu_stats(vcpu);
if (vst->index >= 0 && statidx < vst->nelems)
stats[vst->index + statidx] = val;
#endif
}
static void __inline
vmm_stat_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t x)
{
#ifdef VMM_KEEP_STATS
vmm_stat_array_incr(vcpu, vst, 0, x);
#endif
}
static void __inline
vmm_stat_set(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t val)
{
#ifdef VMM_KEEP_STATS
vmm_stat_array_set(vcpu, vst, 0, val);
#endif
}
#endif /* !_DEV_VMM_STAT_H_ */
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