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 #include <dev/vmm/vmm_vm.h> 36 37 struct vm; 38 39 #define MAX_VMM_STAT_ELEMS 64 /* arbitrary */ 40 41 struct vmm_stat_type; 42 typedef void (*vmm_stat_func_t)(struct vcpu *vcpu, 43 struct vmm_stat_type *stat); 44 typedef bool (*vmm_stat_func_pred_t)(void); 45 46 struct vmm_stat_type { 47 int index; /* position in the stats buffer */ 48 int nelems; /* standalone or array */ 49 const char *desc; /* description of statistic */ 50 vmm_stat_func_t func; 51 vmm_stat_func_pred_t pred; /* predicate to check during registration */ 52 }; 53 54 void vmm_stat_register(void *arg); 55 56 #define VMM_STAT_FDEFINE(type, _nelems, _desc, _func, _pred) \ 57 struct vmm_stat_type type[1] = { \ 58 { \ 59 .index = -1, \ 60 .nelems = _nelems, \ 61 .desc = _desc, \ 62 .func = _func, \ 63 .pred = _pred, \ 64 } \ 65 }; \ 66 SYSINIT(type##_stat, SI_SUB_KLD, SI_ORDER_ANY, vmm_stat_register, type) 67 68 #define VMM_STAT_DEFINE(type, nelems, desc, pred) \ 69 VMM_STAT_FDEFINE(type, nelems, desc, NULL, pred) 70 71 #define VMM_STAT_DECLARE(type) \ 72 extern struct vmm_stat_type type[1] 73 74 #define VMM_STAT(type, desc) \ 75 VMM_STAT_DEFINE(type, 1, desc, NULL) 76 77 #define VMM_STAT_FUNC(type, desc, func) \ 78 VMM_STAT_FDEFINE(type, 1, desc, func, NULL) 79 80 #define VMM_STAT_ARRAY(type, nelems, desc) \ 81 VMM_STAT_DEFINE(type, nelems, desc, NULL) 82 83 void *vmm_stat_alloc(void); 84 void vmm_stat_init(void *vp); 85 void vmm_stat_free(void *vp); 86 87 int vmm_stat_copy(struct vcpu *vcpu, int index, int count, 88 int *num_stats, uint64_t *buf); 89 int vmm_stat_desc_copy(int index, char *buf, int buflen); 90 91 static void __inline 92 vmm_stat_array_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx, 93 uint64_t x) 94 { 95 #ifdef VMM_KEEP_STATS 96 uint64_t *stats; 97 98 stats = vcpu_stats(vcpu); 99 100 if (vst->index >= 0 && statidx < vst->nelems) 101 stats[vst->index + statidx] += x; 102 #endif 103 } 104 105 static void __inline 106 vmm_stat_array_set(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx, 107 uint64_t val) 108 { 109 #ifdef VMM_KEEP_STATS 110 uint64_t *stats; 111 112 stats = vcpu_stats(vcpu); 113 114 if (vst->index >= 0 && statidx < vst->nelems) 115 stats[vst->index + statidx] = val; 116 #endif 117 } 118 119 static void __inline 120 vmm_stat_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t x) 121 { 122 123 #ifdef VMM_KEEP_STATS 124 vmm_stat_array_incr(vcpu, vst, 0, x); 125 #endif 126 } 127 128 static void __inline 129 vmm_stat_set(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t val) 130 { 131 132 #ifdef VMM_KEEP_STATS 133 vmm_stat_array_set(vcpu, vst, 0, val); 134 #endif 135 } 136 137 #endif /* !_DEV_VMM_STAT_H_ */ 138