1 /* 2 * Copyright (C) 2023, Pierrick Bouvier <pierrick.bouvier@linaro.org> 3 * 4 * Demonstrates and tests usage of inline ops. 5 * 6 * License: GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #include <glib.h> 11 #include <stdint.h> 12 #include <stdio.h> 13 14 #include <qemu-plugin.h> 15 16 typedef struct { 17 uint64_t count_tb; 18 uint64_t count_tb_inline; 19 uint64_t count_insn; 20 uint64_t count_insn_inline; 21 uint64_t count_mem; 22 uint64_t count_mem_inline; 23 uint64_t tb_cond_num_trigger; 24 uint64_t tb_cond_track_count; 25 uint64_t insn_cond_num_trigger; 26 uint64_t insn_cond_track_count; 27 } CPUCount; 28 29 static const uint64_t cond_trigger_limit = 100; 30 31 typedef struct { 32 uint64_t data_insn; 33 uint64_t data_tb; 34 uint64_t data_mem; 35 } CPUData; 36 37 static struct qemu_plugin_scoreboard *counts; 38 static qemu_plugin_u64 count_tb; 39 static qemu_plugin_u64 count_tb_inline; 40 static qemu_plugin_u64 count_insn; 41 static qemu_plugin_u64 count_insn_inline; 42 static qemu_plugin_u64 count_mem; 43 static qemu_plugin_u64 count_mem_inline; 44 static qemu_plugin_u64 tb_cond_num_trigger; 45 static qemu_plugin_u64 tb_cond_track_count; 46 static qemu_plugin_u64 insn_cond_num_trigger; 47 static qemu_plugin_u64 insn_cond_track_count; 48 static struct qemu_plugin_scoreboard *data; 49 static qemu_plugin_u64 data_insn; 50 static qemu_plugin_u64 data_tb; 51 static qemu_plugin_u64 data_mem; 52 53 static uint64_t global_count_tb; 54 static uint64_t global_count_insn; 55 static uint64_t global_count_mem; 56 static unsigned int max_cpu_index; 57 static GMutex tb_lock; 58 static GMutex insn_lock; 59 static GMutex mem_lock; 60 61 QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION; 62 63 static void stats_insn(void) 64 { 65 const uint64_t expected = global_count_insn; 66 const uint64_t per_vcpu = qemu_plugin_u64_sum(count_insn); 67 const uint64_t inl_per_vcpu = 68 qemu_plugin_u64_sum(count_insn_inline); 69 const uint64_t cond_num_trigger = 70 qemu_plugin_u64_sum(insn_cond_num_trigger); 71 const uint64_t cond_track_left = qemu_plugin_u64_sum(insn_cond_track_count); 72 const uint64_t conditional = 73 cond_num_trigger * cond_trigger_limit + cond_track_left; 74 printf("insn: %" PRIu64 "\n", expected); 75 printf("insn: %" PRIu64 " (per vcpu)\n", per_vcpu); 76 printf("insn: %" PRIu64 " (per vcpu inline)\n", inl_per_vcpu); 77 printf("insn: %" PRIu64 " (cond cb)\n", conditional); 78 g_assert(expected > 0); 79 g_assert(per_vcpu == expected); 80 g_assert(inl_per_vcpu == expected); 81 g_assert(conditional == expected); 82 } 83 84 static void stats_tb(void) 85 { 86 const uint64_t expected = global_count_tb; 87 const uint64_t per_vcpu = qemu_plugin_u64_sum(count_tb); 88 const uint64_t inl_per_vcpu = 89 qemu_plugin_u64_sum(count_tb_inline); 90 const uint64_t cond_num_trigger = qemu_plugin_u64_sum(tb_cond_num_trigger); 91 const uint64_t cond_track_left = qemu_plugin_u64_sum(tb_cond_track_count); 92 const uint64_t conditional = 93 cond_num_trigger * cond_trigger_limit + cond_track_left; 94 printf("tb: %" PRIu64 "\n", expected); 95 printf("tb: %" PRIu64 " (per vcpu)\n", per_vcpu); 96 printf("tb: %" PRIu64 " (per vcpu inline)\n", inl_per_vcpu); 97 printf("tb: %" PRIu64 " (conditional cb)\n", conditional); 98 g_assert(expected > 0); 99 g_assert(per_vcpu == expected); 100 g_assert(inl_per_vcpu == expected); 101 g_assert(conditional == expected); 102 } 103 104 static void stats_mem(void) 105 { 106 const uint64_t expected = global_count_mem; 107 const uint64_t per_vcpu = qemu_plugin_u64_sum(count_mem); 108 const uint64_t inl_per_vcpu = 109 qemu_plugin_u64_sum(count_mem_inline); 110 printf("mem: %" PRIu64 "\n", expected); 111 printf("mem: %" PRIu64 " (per vcpu)\n", per_vcpu); 112 printf("mem: %" PRIu64 " (per vcpu inline)\n", inl_per_vcpu); 113 g_assert(expected > 0); 114 g_assert(per_vcpu == expected); 115 g_assert(inl_per_vcpu == expected); 116 } 117 118 static void plugin_exit(qemu_plugin_id_t id, void *udata) 119 { 120 const unsigned int num_cpus = qemu_plugin_num_vcpus(); 121 g_assert(num_cpus == max_cpu_index + 1); 122 123 for (int i = 0; i < num_cpus ; ++i) { 124 const uint64_t tb = qemu_plugin_u64_get(count_tb, i); 125 const uint64_t tb_inline = qemu_plugin_u64_get(count_tb_inline, i); 126 const uint64_t insn = qemu_plugin_u64_get(count_insn, i); 127 const uint64_t insn_inline = qemu_plugin_u64_get(count_insn_inline, i); 128 const uint64_t mem = qemu_plugin_u64_get(count_mem, i); 129 const uint64_t mem_inline = qemu_plugin_u64_get(count_mem_inline, i); 130 const uint64_t tb_cond_trigger = 131 qemu_plugin_u64_get(tb_cond_num_trigger, i); 132 const uint64_t tb_cond_left = 133 qemu_plugin_u64_get(tb_cond_track_count, i); 134 const uint64_t insn_cond_trigger = 135 qemu_plugin_u64_get(insn_cond_num_trigger, i); 136 const uint64_t insn_cond_left = 137 qemu_plugin_u64_get(insn_cond_track_count, i); 138 printf("cpu %d: tb (%" PRIu64 ", %" PRIu64 139 ", %" PRIu64 " * %" PRIu64 " + %" PRIu64 140 ") | " 141 "insn (%" PRIu64 ", %" PRIu64 142 ", %" PRIu64 " * %" PRIu64 " + %" PRIu64 143 ") | " 144 "mem (%" PRIu64 ", %" PRIu64 ")" 145 "\n", 146 i, 147 tb, tb_inline, 148 tb_cond_trigger, cond_trigger_limit, tb_cond_left, 149 insn, insn_inline, 150 insn_cond_trigger, cond_trigger_limit, insn_cond_left, 151 mem, mem_inline); 152 g_assert(tb == tb_inline); 153 g_assert(insn == insn_inline); 154 g_assert(mem == mem_inline); 155 g_assert(tb_cond_trigger == tb / cond_trigger_limit); 156 g_assert(tb_cond_left == tb % cond_trigger_limit); 157 g_assert(insn_cond_trigger == insn / cond_trigger_limit); 158 g_assert(insn_cond_left == insn % cond_trigger_limit); 159 } 160 161 stats_tb(); 162 stats_insn(); 163 stats_mem(); 164 165 qemu_plugin_scoreboard_free(counts); 166 qemu_plugin_scoreboard_free(data); 167 } 168 169 static void vcpu_tb_exec(unsigned int cpu_index, void *udata) 170 { 171 qemu_plugin_u64_add(count_tb, cpu_index, 1); 172 g_assert(qemu_plugin_u64_get(data_tb, cpu_index) == (uintptr_t) udata); 173 g_mutex_lock(&tb_lock); 174 max_cpu_index = MAX(max_cpu_index, cpu_index); 175 global_count_tb++; 176 g_mutex_unlock(&tb_lock); 177 } 178 179 static void vcpu_tb_cond_exec(unsigned int cpu_index, void *udata) 180 { 181 g_assert(qemu_plugin_u64_get(tb_cond_track_count, cpu_index) == 182 cond_trigger_limit); 183 g_assert(qemu_plugin_u64_get(data_tb, cpu_index) == (uintptr_t) udata); 184 qemu_plugin_u64_set(tb_cond_track_count, cpu_index, 0); 185 qemu_plugin_u64_add(tb_cond_num_trigger, cpu_index, 1); 186 } 187 188 static void vcpu_insn_cond_exec(unsigned int cpu_index, void *udata) 189 { 190 g_assert(qemu_plugin_u64_get(insn_cond_track_count, cpu_index) == 191 cond_trigger_limit); 192 g_assert(qemu_plugin_u64_get(data_insn, cpu_index) == (uintptr_t) udata); 193 qemu_plugin_u64_set(insn_cond_track_count, cpu_index, 0); 194 qemu_plugin_u64_add(insn_cond_num_trigger, cpu_index, 1); 195 } 196 197 static void vcpu_insn_exec(unsigned int cpu_index, void *udata) 198 { 199 qemu_plugin_u64_add(count_insn, cpu_index, 1); 200 g_assert(qemu_plugin_u64_get(data_insn, cpu_index) == (uintptr_t) udata); 201 g_mutex_lock(&insn_lock); 202 global_count_insn++; 203 g_mutex_unlock(&insn_lock); 204 } 205 206 static void vcpu_mem_access(unsigned int cpu_index, 207 qemu_plugin_meminfo_t info, 208 uint64_t vaddr, 209 void *udata) 210 { 211 qemu_plugin_u64_add(count_mem, cpu_index, 1); 212 g_assert(qemu_plugin_u64_get(data_mem, cpu_index) == (uintptr_t) udata); 213 g_mutex_lock(&mem_lock); 214 global_count_mem++; 215 g_mutex_unlock(&mem_lock); 216 } 217 218 static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) 219 { 220 void *tb_store = tb; 221 qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu( 222 tb, QEMU_PLUGIN_INLINE_STORE_U64, data_tb, (uintptr_t) tb_store); 223 qemu_plugin_register_vcpu_tb_exec_cb( 224 tb, vcpu_tb_exec, QEMU_PLUGIN_CB_NO_REGS, tb_store); 225 qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu( 226 tb, QEMU_PLUGIN_INLINE_ADD_U64, count_tb_inline, 1); 227 228 qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu( 229 tb, QEMU_PLUGIN_INLINE_ADD_U64, tb_cond_track_count, 1); 230 qemu_plugin_register_vcpu_tb_exec_cond_cb( 231 tb, vcpu_tb_cond_exec, QEMU_PLUGIN_CB_NO_REGS, 232 QEMU_PLUGIN_COND_EQ, tb_cond_track_count, cond_trigger_limit, tb_store); 233 234 for (int idx = 0; idx < qemu_plugin_tb_n_insns(tb); ++idx) { 235 struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, idx); 236 void *insn_store = insn; 237 void *mem_store = (char *)insn_store + 0xff; 238 239 qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu( 240 insn, QEMU_PLUGIN_INLINE_STORE_U64, data_insn, 241 (uintptr_t) insn_store); 242 qemu_plugin_register_vcpu_insn_exec_cb( 243 insn, vcpu_insn_exec, QEMU_PLUGIN_CB_NO_REGS, insn_store); 244 qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu( 245 insn, QEMU_PLUGIN_INLINE_ADD_U64, count_insn_inline, 1); 246 247 qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu( 248 insn, QEMU_PLUGIN_INLINE_ADD_U64, insn_cond_track_count, 1); 249 qemu_plugin_register_vcpu_insn_exec_cond_cb( 250 insn, vcpu_insn_cond_exec, QEMU_PLUGIN_CB_NO_REGS, 251 QEMU_PLUGIN_COND_EQ, insn_cond_track_count, cond_trigger_limit, 252 insn_store); 253 254 qemu_plugin_register_vcpu_mem_inline_per_vcpu( 255 insn, QEMU_PLUGIN_MEM_RW, 256 QEMU_PLUGIN_INLINE_STORE_U64, 257 data_mem, (uintptr_t) mem_store); 258 qemu_plugin_register_vcpu_mem_cb(insn, &vcpu_mem_access, 259 QEMU_PLUGIN_CB_NO_REGS, 260 QEMU_PLUGIN_MEM_RW, mem_store); 261 qemu_plugin_register_vcpu_mem_inline_per_vcpu( 262 insn, QEMU_PLUGIN_MEM_RW, 263 QEMU_PLUGIN_INLINE_ADD_U64, 264 count_mem_inline, 1); 265 } 266 } 267 268 QEMU_PLUGIN_EXPORT 269 int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info, 270 int argc, char **argv) 271 { 272 counts = qemu_plugin_scoreboard_new(sizeof(CPUCount)); 273 count_tb = qemu_plugin_scoreboard_u64_in_struct( 274 counts, CPUCount, count_tb); 275 count_insn = qemu_plugin_scoreboard_u64_in_struct( 276 counts, CPUCount, count_insn); 277 count_mem = qemu_plugin_scoreboard_u64_in_struct( 278 counts, CPUCount, count_mem); 279 count_tb_inline = qemu_plugin_scoreboard_u64_in_struct( 280 counts, CPUCount, count_tb_inline); 281 count_insn_inline = qemu_plugin_scoreboard_u64_in_struct( 282 counts, CPUCount, count_insn_inline); 283 count_mem_inline = qemu_plugin_scoreboard_u64_in_struct( 284 counts, CPUCount, count_mem_inline); 285 tb_cond_num_trigger = qemu_plugin_scoreboard_u64_in_struct( 286 counts, CPUCount, tb_cond_num_trigger); 287 tb_cond_track_count = qemu_plugin_scoreboard_u64_in_struct( 288 counts, CPUCount, tb_cond_track_count); 289 insn_cond_num_trigger = qemu_plugin_scoreboard_u64_in_struct( 290 counts, CPUCount, insn_cond_num_trigger); 291 insn_cond_track_count = qemu_plugin_scoreboard_u64_in_struct( 292 counts, CPUCount, insn_cond_track_count); 293 data = qemu_plugin_scoreboard_new(sizeof(CPUData)); 294 data_insn = qemu_plugin_scoreboard_u64_in_struct(data, CPUData, data_insn); 295 data_tb = qemu_plugin_scoreboard_u64_in_struct(data, CPUData, data_tb); 296 data_mem = qemu_plugin_scoreboard_u64_in_struct(data, CPUData, data_mem); 297 298 qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans); 299 qemu_plugin_register_atexit_cb(id, plugin_exit, NULL); 300 301 return 0; 302 } 303