1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/percpu.h> 3 #include <linux/jump_label.h> 4 #include <asm/interrupt.h> 5 #include <asm/opal-api.h> 6 #include <asm/trace.h> 7 #include <asm/asm-prototypes.h> 8 9 #ifdef CONFIG_TRACEPOINTS 10 /* 11 * Since the tracing code might execute OPAL calls we need to guard against 12 * recursion. 13 */ 14 static DEFINE_PER_CPU(unsigned int, opal_trace_depth); 15 16 static void __trace_opal_entry(s64 a0, s64 a1, s64 a2, s64 a3, 17 s64 a4, s64 a5, s64 a6, s64 a7, 18 unsigned long opcode) 19 { 20 unsigned int *depth; 21 unsigned long args[8]; 22 23 depth = this_cpu_ptr(&opal_trace_depth); 24 25 if (*depth) 26 return; 27 28 args[0] = a0; 29 args[1] = a1; 30 args[2] = a2; 31 args[3] = a3; 32 args[4] = a4; 33 args[5] = a5; 34 args[6] = a6; 35 args[7] = a7; 36 37 (*depth)++; 38 trace_opal_entry(opcode, &args[0]); 39 (*depth)--; 40 } 41 42 static void __trace_opal_exit(unsigned long opcode, unsigned long retval) 43 { 44 unsigned int *depth; 45 46 depth = this_cpu_ptr(&opal_trace_depth); 47 48 if (*depth) 49 return; 50 51 (*depth)++; 52 trace_opal_exit(opcode, retval); 53 (*depth)--; 54 } 55 56 static DEFINE_STATIC_KEY_FALSE(opal_tracepoint_key); 57 58 int opal_tracepoint_regfunc(void) 59 { 60 static_branch_inc(&opal_tracepoint_key); 61 return 0; 62 } 63 64 void opal_tracepoint_unregfunc(void) 65 { 66 static_branch_dec(&opal_tracepoint_key); 67 } 68 69 static s64 __opal_call_trace(s64 a0, s64 a1, s64 a2, s64 a3, 70 s64 a4, s64 a5, s64 a6, s64 a7, 71 unsigned long opcode, unsigned long msr) 72 { 73 s64 ret; 74 75 __trace_opal_entry(a0, a1, a2, a3, a4, a5, a6, a7, opcode); 76 ret = __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr); 77 __trace_opal_exit(opcode, ret); 78 79 return ret; 80 } 81 82 #define DO_TRACE (static_branch_unlikely(&opal_tracepoint_key)) 83 84 #else /* CONFIG_TRACEPOINTS */ 85 86 static s64 __opal_call_trace(s64 a0, s64 a1, s64 a2, s64 a3, 87 s64 a4, s64 a5, s64 a6, s64 a7, 88 unsigned long opcode, unsigned long msr) 89 { 90 return 0; 91 } 92 93 #define DO_TRACE false 94 #endif /* CONFIG_TRACEPOINTS */ 95 96 static int64_t opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3, 97 int64_t a4, int64_t a5, int64_t a6, int64_t a7, int64_t opcode) 98 { 99 unsigned long flags; 100 unsigned long msr = mfmsr(); 101 bool mmu = (msr & (MSR_IR|MSR_DR)); 102 int64_t ret; 103 104 /* OPAL call / firmware may use SRR and/or HSRR */ 105 srr_regs_clobbered(); 106 107 msr &= ~MSR_EE; 108 109 if (unlikely(!mmu)) 110 return __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr); 111 112 local_save_flags(flags); 113 hard_irq_disable(); 114 115 if (DO_TRACE) { 116 ret = __opal_call_trace(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr); 117 } else { 118 ret = __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr); 119 } 120 121 local_irq_restore(flags); 122 123 return ret; 124 } 125 126 #define OPAL_CALL(name, opcode) \ 127 int64_t name(int64_t a0, int64_t a1, int64_t a2, int64_t a3, \ 128 int64_t a4, int64_t a5, int64_t a6, int64_t a7); \ 129 int64_t name(int64_t a0, int64_t a1, int64_t a2, int64_t a3, \ 130 int64_t a4, int64_t a5, int64_t a6, int64_t a7) \ 131 { \ 132 return opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode); \ 133 } 134 135 OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL); 136 OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE); 137 OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ); 138 OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE); 139 OPAL_CALL(opal_rtc_read, OPAL_RTC_READ); 140 OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE); 141 OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN); 142 OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT); 143 OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2); 144 OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM); 145 OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM); 146 OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT); 147 OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS); 148 OPAL_CALL(opal_pci_set_hub_tce_memory, OPAL_PCI_SET_HUB_TCE_MEMORY); 149 OPAL_CALL(opal_pci_set_phb_tce_memory, OPAL_PCI_SET_PHB_TCE_MEMORY); 150 OPAL_CALL(opal_pci_config_read_byte, OPAL_PCI_CONFIG_READ_BYTE); 151 OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD); 152 OPAL_CALL(opal_pci_config_read_word, OPAL_PCI_CONFIG_READ_WORD); 153 OPAL_CALL(opal_pci_config_write_byte, OPAL_PCI_CONFIG_WRITE_BYTE); 154 OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD); 155 OPAL_CALL(opal_pci_config_write_word, OPAL_PCI_CONFIG_WRITE_WORD); 156 OPAL_CALL(opal_set_xive, OPAL_SET_XIVE); 157 OPAL_CALL(opal_get_xive, OPAL_GET_XIVE); 158 OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER); 159 OPAL_CALL(opal_pci_eeh_freeze_status, OPAL_PCI_EEH_FREEZE_STATUS); 160 OPAL_CALL(opal_pci_eeh_freeze_clear, OPAL_PCI_EEH_FREEZE_CLEAR); 161 OPAL_CALL(opal_pci_eeh_freeze_set, OPAL_PCI_EEH_FREEZE_SET); 162 OPAL_CALL(opal_pci_err_inject, OPAL_PCI_ERR_INJECT); 163 OPAL_CALL(opal_pci_shpc, OPAL_PCI_SHPC); 164 OPAL_CALL(opal_pci_phb_mmio_enable, OPAL_PCI_PHB_MMIO_ENABLE); 165 OPAL_CALL(opal_pci_set_phb_mem_window, OPAL_PCI_SET_PHB_MEM_WINDOW); 166 OPAL_CALL(opal_pci_map_pe_mmio_window, OPAL_PCI_MAP_PE_MMIO_WINDOW); 167 OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY); 168 OPAL_CALL(opal_pci_set_pe, OPAL_PCI_SET_PE); 169 OPAL_CALL(opal_pci_set_peltv, OPAL_PCI_SET_PELTV); 170 OPAL_CALL(opal_pci_set_mve, OPAL_PCI_SET_MVE); 171 OPAL_CALL(opal_pci_set_mve_enable, OPAL_PCI_SET_MVE_ENABLE); 172 OPAL_CALL(opal_pci_get_xive_reissue, OPAL_PCI_GET_XIVE_REISSUE); 173 OPAL_CALL(opal_pci_set_xive_reissue, OPAL_PCI_SET_XIVE_REISSUE); 174 OPAL_CALL(opal_pci_set_xive_pe, OPAL_PCI_SET_XIVE_PE); 175 OPAL_CALL(opal_get_xive_source, OPAL_GET_XIVE_SOURCE); 176 OPAL_CALL(opal_get_msi_32, OPAL_GET_MSI_32); 177 OPAL_CALL(opal_get_msi_64, OPAL_GET_MSI_64); 178 OPAL_CALL(opal_start_cpu, OPAL_START_CPU); 179 OPAL_CALL(opal_query_cpu_status, OPAL_QUERY_CPU_STATUS); 180 OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL); 181 OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW); 182 OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL); 183 OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET); 184 OPAL_CALL(opal_pci_get_hub_diag_data, OPAL_PCI_GET_HUB_DIAG_DATA); 185 OPAL_CALL(opal_pci_get_phb_diag_data, OPAL_PCI_GET_PHB_DIAG_DATA); 186 OPAL_CALL(opal_pci_fence_phb, OPAL_PCI_FENCE_PHB); 187 OPAL_CALL(opal_pci_reinit, OPAL_PCI_REINIT); 188 OPAL_CALL(opal_pci_mask_pe_error, OPAL_PCI_MASK_PE_ERROR); 189 OPAL_CALL(opal_set_slot_led_status, OPAL_SET_SLOT_LED_STATUS); 190 OPAL_CALL(opal_get_epow_status, OPAL_GET_EPOW_STATUS); 191 OPAL_CALL(opal_get_dpo_status, OPAL_GET_DPO_STATUS); 192 OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED); 193 OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR); 194 OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL); 195 OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI); 196 OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2); 197 OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ); 198 OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE); 199 OPAL_CALL(opal_lpc_read, OPAL_LPC_READ); 200 OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE); 201 OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU); 202 OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS); 203 OPAL_CALL(opal_read_elog, OPAL_ELOG_READ); 204 OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK); 205 OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE); 206 OPAL_CALL(opal_resend_pending_logs, OPAL_ELOG_RESEND); 207 OPAL_CALL(opal_write_elog, OPAL_ELOG_WRITE); 208 OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE); 209 OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE); 210 OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE); 211 OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE); 212 OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN); 213 OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT); 214 OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO); 215 OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2); 216 OPAL_CALL(opal_dump_read, OPAL_DUMP_READ); 217 OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK); 218 OPAL_CALL(opal_get_msg, OPAL_GET_MSG); 219 OPAL_CALL(opal_write_oppanel_async, OPAL_WRITE_OPPANEL_ASYNC); 220 OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION); 221 OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND); 222 OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT); 223 OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ); 224 OPAL_CALL(opal_get_param, OPAL_GET_PARAM); 225 OPAL_CALL(opal_set_param, OPAL_SET_PARAM); 226 OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI); 227 OPAL_CALL(opal_handle_hmi2, OPAL_HANDLE_HMI2); 228 OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE); 229 OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG); 230 OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION); 231 OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION); 232 OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CAPI_MODE); 233 OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO); 234 OPAL_CALL(opal_tpo_read, OPAL_READ_TPO); 235 OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND); 236 OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV); 237 OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST); 238 OPAL_CALL(opal_flash_read, OPAL_FLASH_READ); 239 OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE); 240 OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE); 241 OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG); 242 OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR); 243 OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR); 244 OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH); 245 OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE); 246 OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE); 247 OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE); 248 OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE); 249 OPAL_CALL(opal_int_get_xirr, OPAL_INT_GET_XIRR); 250 OPAL_CALL(opal_int_set_cppr, OPAL_INT_SET_CPPR); 251 OPAL_CALL(opal_int_eoi, OPAL_INT_EOI); 252 OPAL_CALL(opal_int_set_mfrr, OPAL_INT_SET_MFRR); 253 OPAL_CALL(opal_pci_tce_kill, OPAL_PCI_TCE_KILL); 254 OPAL_CALL(opal_nmmu_set_ptcr, OPAL_NMMU_SET_PTCR); 255 OPAL_CALL(opal_xive_reset, OPAL_XIVE_RESET); 256 OPAL_CALL(opal_xive_get_irq_info, OPAL_XIVE_GET_IRQ_INFO); 257 OPAL_CALL(opal_xive_get_irq_config, OPAL_XIVE_GET_IRQ_CONFIG); 258 OPAL_CALL(opal_xive_set_irq_config, OPAL_XIVE_SET_IRQ_CONFIG); 259 OPAL_CALL(opal_xive_get_queue_info, OPAL_XIVE_GET_QUEUE_INFO); 260 OPAL_CALL(opal_xive_set_queue_info, OPAL_XIVE_SET_QUEUE_INFO); 261 OPAL_CALL(opal_xive_donate_page, OPAL_XIVE_DONATE_PAGE); 262 OPAL_CALL(opal_xive_alloc_vp_block, OPAL_XIVE_ALLOCATE_VP_BLOCK); 263 OPAL_CALL(opal_xive_free_vp_block, OPAL_XIVE_FREE_VP_BLOCK); 264 OPAL_CALL(opal_xive_allocate_irq_raw, OPAL_XIVE_ALLOCATE_IRQ); 265 OPAL_CALL(opal_xive_free_irq, OPAL_XIVE_FREE_IRQ); 266 OPAL_CALL(opal_xive_get_vp_info, OPAL_XIVE_GET_VP_INFO); 267 OPAL_CALL(opal_xive_set_vp_info, OPAL_XIVE_SET_VP_INFO); 268 OPAL_CALL(opal_xive_sync, OPAL_XIVE_SYNC); 269 OPAL_CALL(opal_xive_dump, OPAL_XIVE_DUMP); 270 OPAL_CALL(opal_xive_get_queue_state, OPAL_XIVE_GET_QUEUE_STATE); 271 OPAL_CALL(opal_xive_set_queue_state, OPAL_XIVE_SET_QUEUE_STATE); 272 OPAL_CALL(opal_xive_get_vp_state, OPAL_XIVE_GET_VP_STATE); 273 OPAL_CALL(opal_signal_system_reset, OPAL_SIGNAL_SYSTEM_RESET); 274 OPAL_CALL(opal_npu_map_lpar, OPAL_NPU_MAP_LPAR); 275 OPAL_CALL(opal_imc_counters_init, OPAL_IMC_COUNTERS_INIT); 276 OPAL_CALL(opal_imc_counters_start, OPAL_IMC_COUNTERS_START); 277 OPAL_CALL(opal_imc_counters_stop, OPAL_IMC_COUNTERS_STOP); 278 OPAL_CALL(opal_get_powercap, OPAL_GET_POWERCAP); 279 OPAL_CALL(opal_set_powercap, OPAL_SET_POWERCAP); 280 OPAL_CALL(opal_get_power_shift_ratio, OPAL_GET_POWER_SHIFT_RATIO); 281 OPAL_CALL(opal_set_power_shift_ratio, OPAL_SET_POWER_SHIFT_RATIO); 282 OPAL_CALL(opal_sensor_group_clear, OPAL_SENSOR_GROUP_CLEAR); 283 OPAL_CALL(opal_quiesce, OPAL_QUIESCE); 284 OPAL_CALL(opal_npu_spa_setup, OPAL_NPU_SPA_SETUP); 285 OPAL_CALL(opal_npu_spa_clear_cache, OPAL_NPU_SPA_CLEAR_CACHE); 286 OPAL_CALL(opal_npu_tl_set, OPAL_NPU_TL_SET); 287 OPAL_CALL(opal_pci_get_pbcq_tunnel_bar, OPAL_PCI_GET_PBCQ_TUNNEL_BAR); 288 OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR); 289 OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64); 290 OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE); 291 OPAL_CALL(opal_nx_coproc_init, OPAL_NX_COPROC_INIT); 292 OPAL_CALL(opal_mpipl_update, OPAL_MPIPL_UPDATE); 293 OPAL_CALL(opal_mpipl_register_tag, OPAL_MPIPL_REGISTER_TAG); 294 OPAL_CALL(opal_mpipl_query_tag, OPAL_MPIPL_QUERY_TAG); 295 OPAL_CALL(opal_secvar_get, OPAL_SECVAR_GET); 296 OPAL_CALL(opal_secvar_get_next, OPAL_SECVAR_GET_NEXT); 297 OPAL_CALL(opal_secvar_enqueue_update, OPAL_SECVAR_ENQUEUE_UPDATE); 298