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 */ 14static DEFINE_PER_CPU(unsigned int, opal_trace_depth); 15 16static 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 42static 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 56static DEFINE_STATIC_KEY_FALSE(opal_tracepoint_key); 57 58int opal_tracepoint_regfunc(void) 59{ 60 static_branch_inc(&opal_tracepoint_key); 61 return 0; 62} 63 64void opal_tracepoint_unregfunc(void) 65{ 66 static_branch_dec(&opal_tracepoint_key); 67} 68 69static 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 86static 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 96static 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) \ 127int64_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); \ 129int64_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 135OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL); 136OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE); 137OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ); 138OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE); 139OPAL_CALL(opal_rtc_read, OPAL_RTC_READ); 140OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE); 141OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN); 142OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT); 143OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2); 144OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM); 145OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM); 146OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT); 147OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS); 148OPAL_CALL(opal_pci_set_hub_tce_memory, OPAL_PCI_SET_HUB_TCE_MEMORY); 149OPAL_CALL(opal_pci_set_phb_tce_memory, OPAL_PCI_SET_PHB_TCE_MEMORY); 150OPAL_CALL(opal_pci_config_read_byte, OPAL_PCI_CONFIG_READ_BYTE); 151OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD); 152OPAL_CALL(opal_pci_config_read_word, OPAL_PCI_CONFIG_READ_WORD); 153OPAL_CALL(opal_pci_config_write_byte, OPAL_PCI_CONFIG_WRITE_BYTE); 154OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD); 155OPAL_CALL(opal_pci_config_write_word, OPAL_PCI_CONFIG_WRITE_WORD); 156OPAL_CALL(opal_set_xive, OPAL_SET_XIVE); 157OPAL_CALL(opal_get_xive, OPAL_GET_XIVE); 158OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER); 159OPAL_CALL(opal_pci_eeh_freeze_status, OPAL_PCI_EEH_FREEZE_STATUS); 160OPAL_CALL(opal_pci_eeh_freeze_clear, OPAL_PCI_EEH_FREEZE_CLEAR); 161OPAL_CALL(opal_pci_eeh_freeze_set, OPAL_PCI_EEH_FREEZE_SET); 162OPAL_CALL(opal_pci_err_inject, OPAL_PCI_ERR_INJECT); 163OPAL_CALL(opal_pci_shpc, OPAL_PCI_SHPC); 164OPAL_CALL(opal_pci_phb_mmio_enable, OPAL_PCI_PHB_MMIO_ENABLE); 165OPAL_CALL(opal_pci_set_phb_mem_window, OPAL_PCI_SET_PHB_MEM_WINDOW); 166OPAL_CALL(opal_pci_map_pe_mmio_window, OPAL_PCI_MAP_PE_MMIO_WINDOW); 167OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY); 168OPAL_CALL(opal_pci_set_pe, OPAL_PCI_SET_PE); 169OPAL_CALL(opal_pci_set_peltv, OPAL_PCI_SET_PELTV); 170OPAL_CALL(opal_pci_get_xive_reissue, OPAL_PCI_GET_XIVE_REISSUE); 171OPAL_CALL(opal_pci_set_xive_reissue, OPAL_PCI_SET_XIVE_REISSUE); 172OPAL_CALL(opal_pci_set_xive_pe, OPAL_PCI_SET_XIVE_PE); 173OPAL_CALL(opal_get_xive_source, OPAL_GET_XIVE_SOURCE); 174OPAL_CALL(opal_get_msi_32, OPAL_GET_MSI_32); 175OPAL_CALL(opal_get_msi_64, OPAL_GET_MSI_64); 176OPAL_CALL(opal_start_cpu, OPAL_START_CPU); 177OPAL_CALL(opal_query_cpu_status, OPAL_QUERY_CPU_STATUS); 178OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL); 179OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW); 180OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL); 181OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET); 182OPAL_CALL(opal_pci_get_hub_diag_data, OPAL_PCI_GET_HUB_DIAG_DATA); 183OPAL_CALL(opal_pci_get_phb_diag_data, OPAL_PCI_GET_PHB_DIAG_DATA); 184OPAL_CALL(opal_pci_fence_phb, OPAL_PCI_FENCE_PHB); 185OPAL_CALL(opal_pci_reinit, OPAL_PCI_REINIT); 186OPAL_CALL(opal_pci_mask_pe_error, OPAL_PCI_MASK_PE_ERROR); 187OPAL_CALL(opal_set_slot_led_status, OPAL_SET_SLOT_LED_STATUS); 188OPAL_CALL(opal_get_epow_status, OPAL_GET_EPOW_STATUS); 189OPAL_CALL(opal_get_dpo_status, OPAL_GET_DPO_STATUS); 190OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED); 191OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR); 192OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL); 193OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI); 194OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2); 195OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ); 196OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE); 197OPAL_CALL(opal_lpc_read, OPAL_LPC_READ); 198OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE); 199OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU); 200OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS); 201OPAL_CALL(opal_read_elog, OPAL_ELOG_READ); 202OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK); 203OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE); 204OPAL_CALL(opal_resend_pending_logs, OPAL_ELOG_RESEND); 205OPAL_CALL(opal_write_elog, OPAL_ELOG_WRITE); 206OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE); 207OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE); 208OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE); 209OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE); 210OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN); 211OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT); 212OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO); 213OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2); 214OPAL_CALL(opal_dump_read, OPAL_DUMP_READ); 215OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK); 216OPAL_CALL(opal_get_msg, OPAL_GET_MSG); 217OPAL_CALL(opal_write_oppanel_async, OPAL_WRITE_OPPANEL_ASYNC); 218OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION); 219OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND); 220OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT); 221OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ); 222OPAL_CALL(opal_get_param, OPAL_GET_PARAM); 223OPAL_CALL(opal_set_param, OPAL_SET_PARAM); 224OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI); 225OPAL_CALL(opal_handle_hmi2, OPAL_HANDLE_HMI2); 226OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE); 227OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG); 228OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION); 229OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION); 230OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CAPI_MODE); 231OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO); 232OPAL_CALL(opal_tpo_read, OPAL_READ_TPO); 233OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND); 234OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV); 235OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST); 236OPAL_CALL(opal_flash_read, OPAL_FLASH_READ); 237OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE); 238OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE); 239OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG); 240OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR); 241OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR); 242OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH); 243OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE); 244OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE); 245OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE); 246OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE); 247OPAL_CALL(opal_int_get_xirr, OPAL_INT_GET_XIRR); 248OPAL_CALL(opal_int_set_cppr, OPAL_INT_SET_CPPR); 249OPAL_CALL(opal_int_eoi, OPAL_INT_EOI); 250OPAL_CALL(opal_int_set_mfrr, OPAL_INT_SET_MFRR); 251OPAL_CALL(opal_pci_tce_kill, OPAL_PCI_TCE_KILL); 252OPAL_CALL(opal_nmmu_set_ptcr, OPAL_NMMU_SET_PTCR); 253OPAL_CALL(opal_xive_reset, OPAL_XIVE_RESET); 254OPAL_CALL(opal_xive_get_irq_info, OPAL_XIVE_GET_IRQ_INFO); 255OPAL_CALL(opal_xive_get_irq_config, OPAL_XIVE_GET_IRQ_CONFIG); 256OPAL_CALL(opal_xive_set_irq_config, OPAL_XIVE_SET_IRQ_CONFIG); 257OPAL_CALL(opal_xive_get_queue_info, OPAL_XIVE_GET_QUEUE_INFO); 258OPAL_CALL(opal_xive_set_queue_info, OPAL_XIVE_SET_QUEUE_INFO); 259OPAL_CALL(opal_xive_donate_page, OPAL_XIVE_DONATE_PAGE); 260OPAL_CALL(opal_xive_alloc_vp_block, OPAL_XIVE_ALLOCATE_VP_BLOCK); 261OPAL_CALL(opal_xive_free_vp_block, OPAL_XIVE_FREE_VP_BLOCK); 262OPAL_CALL(opal_xive_allocate_irq_raw, OPAL_XIVE_ALLOCATE_IRQ); 263OPAL_CALL(opal_xive_free_irq, OPAL_XIVE_FREE_IRQ); 264OPAL_CALL(opal_xive_get_vp_info, OPAL_XIVE_GET_VP_INFO); 265OPAL_CALL(opal_xive_set_vp_info, OPAL_XIVE_SET_VP_INFO); 266OPAL_CALL(opal_xive_sync, OPAL_XIVE_SYNC); 267OPAL_CALL(opal_xive_dump, OPAL_XIVE_DUMP); 268OPAL_CALL(opal_xive_get_queue_state, OPAL_XIVE_GET_QUEUE_STATE); 269OPAL_CALL(opal_xive_set_queue_state, OPAL_XIVE_SET_QUEUE_STATE); 270OPAL_CALL(opal_xive_get_vp_state, OPAL_XIVE_GET_VP_STATE); 271OPAL_CALL(opal_signal_system_reset, OPAL_SIGNAL_SYSTEM_RESET); 272OPAL_CALL(opal_npu_map_lpar, OPAL_NPU_MAP_LPAR); 273OPAL_CALL(opal_imc_counters_init, OPAL_IMC_COUNTERS_INIT); 274OPAL_CALL(opal_imc_counters_start, OPAL_IMC_COUNTERS_START); 275OPAL_CALL(opal_imc_counters_stop, OPAL_IMC_COUNTERS_STOP); 276OPAL_CALL(opal_get_powercap, OPAL_GET_POWERCAP); 277OPAL_CALL(opal_set_powercap, OPAL_SET_POWERCAP); 278OPAL_CALL(opal_get_power_shift_ratio, OPAL_GET_POWER_SHIFT_RATIO); 279OPAL_CALL(opal_set_power_shift_ratio, OPAL_SET_POWER_SHIFT_RATIO); 280OPAL_CALL(opal_sensor_group_clear, OPAL_SENSOR_GROUP_CLEAR); 281OPAL_CALL(opal_quiesce, OPAL_QUIESCE); 282OPAL_CALL(opal_npu_spa_setup, OPAL_NPU_SPA_SETUP); 283OPAL_CALL(opal_npu_spa_clear_cache, OPAL_NPU_SPA_CLEAR_CACHE); 284OPAL_CALL(opal_npu_tl_set, OPAL_NPU_TL_SET); 285OPAL_CALL(opal_pci_get_pbcq_tunnel_bar, OPAL_PCI_GET_PBCQ_TUNNEL_BAR); 286OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR); 287OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64); 288OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE); 289OPAL_CALL(opal_nx_coproc_init, OPAL_NX_COPROC_INIT); 290OPAL_CALL(opal_mpipl_update, OPAL_MPIPL_UPDATE); 291OPAL_CALL(opal_mpipl_register_tag, OPAL_MPIPL_REGISTER_TAG); 292OPAL_CALL(opal_mpipl_query_tag, OPAL_MPIPL_QUERY_TAG); 293OPAL_CALL(opal_secvar_get, OPAL_SECVAR_GET); 294OPAL_CALL(opal_secvar_get_next, OPAL_SECVAR_GET_NEXT); 295OPAL_CALL(opal_secvar_enqueue_update, OPAL_SECVAR_ENQUEUE_UPDATE); 296