1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _DEV_VMM_STAT_H_ 33 #define _DEV_VMM_STAT_H_ 34 35 struct vm; 36 37 #define MAX_VMM_STAT_ELEMS 64 /* arbitrary */ 38 39 struct vmm_stat_type; 40 typedef void (*vmm_stat_func_t)(struct vcpu *vcpu, 41 struct vmm_stat_type *stat); 42 typedef bool (*vmm_stat_func_pred_t)(void); 43 44 struct vmm_stat_type { 45 int index; /* position in the stats buffer */ 46 int nelems; /* standalone or array */ 47 const char *desc; /* description of statistic */ 48 vmm_stat_func_t func; 49 vmm_stat_func_pred_t pred; /* predicate to check during registration */ 50 }; 51 52 void vmm_stat_register(void *arg); 53 54 #define VMM_STAT_FDEFINE(type, _nelems, _desc, _func, _pred) \ 55 struct vmm_stat_type type[1] = { \ 56 { \ 57 .index = -1, \ 58 .nelems = _nelems, \ 59 .desc = _desc, \ 60 .func = _func, \ 61 .pred = _pred, \ 62 } \ 63 }; \ 64 SYSINIT(type##_stat, SI_SUB_KLD, SI_ORDER_ANY, vmm_stat_register, type) 65 66 #define VMM_STAT_DEFINE(type, nelems, desc, pred) \ 67 VMM_STAT_FDEFINE(type, nelems, desc, NULL, pred) 68 69 #define VMM_STAT_DECLARE(type) \ 70 extern struct vmm_stat_type type[1] 71 72 #define VMM_STAT(type, desc) \ 73 VMM_STAT_DEFINE(type, 1, desc, NULL) 74 75 #define VMM_STAT_FUNC(type, desc, func) \ 76 VMM_STAT_FDEFINE(type, 1, desc, func, NULL) 77 78 #define VMM_STAT_ARRAY(type, nelems, desc) \ 79 VMM_STAT_DEFINE(type, nelems, desc, NULL) 80 81 void *vmm_stat_alloc(void); 82 void vmm_stat_init(void *vp); 83 void vmm_stat_free(void *vp); 84 85 int vmm_stat_copy(struct vcpu *vcpu, int index, int count, 86 int *num_stats, uint64_t *buf); 87 int vmm_stat_desc_copy(int index, char *buf, int buflen); 88 89 static void __inline 90 vmm_stat_array_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx, 91 uint64_t x) 92 { 93 #ifdef VMM_KEEP_STATS 94 uint64_t *stats; 95 96 stats = vcpu_stats(vcpu); 97 98 if (vst->index >= 0 && statidx < vst->nelems) 99 stats[vst->index + statidx] += x; 100 #endif 101 } 102 103 static void __inline 104 vmm_stat_array_set(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx, 105 uint64_t val) 106 { 107 #ifdef VMM_KEEP_STATS 108 uint64_t *stats; 109 110 stats = vcpu_stats(vcpu); 111 112 if (vst->index >= 0 && statidx < vst->nelems) 113 stats[vst->index + statidx] = val; 114 #endif 115 } 116 117 static void __inline 118 vmm_stat_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t x) 119 { 120 121 #ifdef VMM_KEEP_STATS 122 vmm_stat_array_incr(vcpu, vst, 0, x); 123 #endif 124 } 125 126 static void __inline 127 vmm_stat_set(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t val) 128 { 129 130 #ifdef VMM_KEEP_STATS 131 vmm_stat_array_set(vcpu, vst, 0, val); 132 #endif 133 } 134 135 #endif /* !_DEV_VMM_STAT_H_ */ 136