arch/powerpc/platforms/powernv/opal-call.c

   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_get_xive_reissue,            OPAL_PCI_GET_XIVE_REISSUE);
 171 OPAL_CALL(opal_pci_set_xive_reissue,            OPAL_PCI_SET_XIVE_REISSUE);
 172 OPAL_CALL(opal_pci_set_xive_pe,                 OPAL_PCI_SET_XIVE_PE);
 173 OPAL_CALL(opal_get_xive_source,                 OPAL_GET_XIVE_SOURCE);
 174 OPAL_CALL(opal_get_msi_32,                      OPAL_GET_MSI_32);
 175 OPAL_CALL(opal_get_msi_64,                      OPAL_GET_MSI_64);
 176 OPAL_CALL(opal_start_cpu,                       OPAL_START_CPU);
 177 OPAL_CALL(opal_query_cpu_status,                OPAL_QUERY_CPU_STATUS);
 178 OPAL_CALL(opal_write_oppanel,                   OPAL_WRITE_OPPANEL);
 179 OPAL_CALL(opal_pci_map_pe_dma_window,           OPAL_PCI_MAP_PE_DMA_WINDOW);
 180 OPAL_CALL(opal_pci_map_pe_dma_window_real,      OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
 181 OPAL_CALL(opal_pci_reset,                       OPAL_PCI_RESET);
 182 OPAL_CALL(opal_pci_get_hub_diag_data,           OPAL_PCI_GET_HUB_DIAG_DATA);
 183 OPAL_CALL(opal_pci_get_phb_diag_data,           OPAL_PCI_GET_PHB_DIAG_DATA);
 184 OPAL_CALL(opal_pci_fence_phb,                   OPAL_PCI_FENCE_PHB);
 185 OPAL_CALL(opal_pci_reinit,                      OPAL_PCI_REINIT);
 186 OPAL_CALL(opal_pci_mask_pe_error,               OPAL_PCI_MASK_PE_ERROR);
 187 OPAL_CALL(opal_set_slot_led_status,             OPAL_SET_SLOT_LED_STATUS);
 188 OPAL_CALL(opal_get_epow_status,                 OPAL_GET_EPOW_STATUS);
 189 OPAL_CALL(opal_get_dpo_status,                  OPAL_GET_DPO_STATUS);
 190 OPAL_CALL(opal_set_system_attention_led,        OPAL_SET_SYSTEM_ATTENTION_LED);
 191 OPAL_CALL(opal_pci_next_error,                  OPAL_PCI_NEXT_ERROR);
 192 OPAL_CALL(opal_pci_poll,                        OPAL_PCI_POLL);
 193 OPAL_CALL(opal_pci_msi_eoi,                     OPAL_PCI_MSI_EOI);
 194 OPAL_CALL(opal_pci_get_phb_diag_data2,          OPAL_PCI_GET_PHB_DIAG_DATA2);
 195 OPAL_CALL(opal_xscom_read,                      OPAL_XSCOM_READ);
 196 OPAL_CALL(opal_xscom_write,                     OPAL_XSCOM_WRITE);
 197 OPAL_CALL(opal_lpc_read,                        OPAL_LPC_READ);
 198 OPAL_CALL(opal_lpc_write,                       OPAL_LPC_WRITE);
 199 OPAL_CALL(opal_return_cpu,                      OPAL_RETURN_CPU);
 200 OPAL_CALL(opal_reinit_cpus,                     OPAL_REINIT_CPUS);
 201 OPAL_CALL(opal_read_elog,                       OPAL_ELOG_READ);
 202 OPAL_CALL(opal_send_ack_elog,                   OPAL_ELOG_ACK);
 203 OPAL_CALL(opal_get_elog_size,                   OPAL_ELOG_SIZE);
 204 OPAL_CALL(opal_resend_pending_logs,             OPAL_ELOG_RESEND);
 205 OPAL_CALL(opal_write_elog,                      OPAL_ELOG_WRITE);
 206 OPAL_CALL(opal_validate_flash,                  OPAL_FLASH_VALIDATE);
 207 OPAL_CALL(opal_manage_flash,                    OPAL_FLASH_MANAGE);
 208 OPAL_CALL(opal_update_flash,                    OPAL_FLASH_UPDATE);
 209 OPAL_CALL(opal_resync_timebase,                 OPAL_RESYNC_TIMEBASE);
 210 OPAL_CALL(opal_check_token,                     OPAL_CHECK_TOKEN);
 211 OPAL_CALL(opal_dump_init,                       OPAL_DUMP_INIT);
 212 OPAL_CALL(opal_dump_info,                       OPAL_DUMP_INFO);
 213 OPAL_CALL(opal_dump_info2,                      OPAL_DUMP_INFO2);
 214 OPAL_CALL(opal_dump_read,                       OPAL_DUMP_READ);
 215 OPAL_CALL(opal_dump_ack,                        OPAL_DUMP_ACK);
 216 OPAL_CALL(opal_get_msg,                         OPAL_GET_MSG);
 217 OPAL_CALL(opal_write_oppanel_async,             OPAL_WRITE_OPPANEL_ASYNC);
 218 OPAL_CALL(opal_check_completion,                OPAL_CHECK_ASYNC_COMPLETION);
 219 OPAL_CALL(opal_dump_resend_notification,        OPAL_DUMP_RESEND);
 220 OPAL_CALL(opal_sync_host_reboot,                OPAL_SYNC_HOST_REBOOT);
 221 OPAL_CALL(opal_sensor_read,                     OPAL_SENSOR_READ);
 222 OPAL_CALL(opal_get_param,                       OPAL_GET_PARAM);
 223 OPAL_CALL(opal_set_param,                       OPAL_SET_PARAM);
 224 OPAL_CALL(opal_handle_hmi,                      OPAL_HANDLE_HMI);
 225 OPAL_CALL(opal_handle_hmi2,                     OPAL_HANDLE_HMI2);
 226 OPAL_CALL(opal_config_cpu_idle_state,           OPAL_CONFIG_CPU_IDLE_STATE);
 227 OPAL_CALL(opal_slw_set_reg,                     OPAL_SLW_SET_REG);
 228 OPAL_CALL(opal_register_dump_region,            OPAL_REGISTER_DUMP_REGION);
 229 OPAL_CALL(opal_unregister_dump_region,          OPAL_UNREGISTER_DUMP_REGION);
 230 OPAL_CALL(opal_pci_set_phb_cxl_mode,            OPAL_PCI_SET_PHB_CAPI_MODE);
 231 OPAL_CALL(opal_tpo_write,                       OPAL_WRITE_TPO);
 232 OPAL_CALL(opal_tpo_read,                        OPAL_READ_TPO);
 233 OPAL_CALL(opal_ipmi_send,                       OPAL_IPMI_SEND);
 234 OPAL_CALL(opal_ipmi_recv,                       OPAL_IPMI_RECV);
 235 OPAL_CALL(opal_i2c_request,                     OPAL_I2C_REQUEST);
 236 OPAL_CALL(opal_flash_read,                      OPAL_FLASH_READ);
 237 OPAL_CALL(opal_flash_write,                     OPAL_FLASH_WRITE);
 238 OPAL_CALL(opal_flash_erase,                     OPAL_FLASH_ERASE);
 239 OPAL_CALL(opal_prd_msg,                         OPAL_PRD_MSG);
 240 OPAL_CALL(opal_leds_get_ind,                    OPAL_LEDS_GET_INDICATOR);
 241 OPAL_CALL(opal_leds_set_ind,                    OPAL_LEDS_SET_INDICATOR);
 242 OPAL_CALL(opal_console_flush,                   OPAL_CONSOLE_FLUSH);
 243 OPAL_CALL(opal_get_device_tree,                 OPAL_GET_DEVICE_TREE);
 244 OPAL_CALL(opal_pci_get_presence_state,          OPAL_PCI_GET_PRESENCE_STATE);
 245 OPAL_CALL(opal_pci_get_power_state,             OPAL_PCI_GET_POWER_STATE);
 246 OPAL_CALL(opal_pci_set_power_state,             OPAL_PCI_SET_POWER_STATE);
 247 OPAL_CALL(opal_int_get_xirr,                    OPAL_INT_GET_XIRR);
 248 OPAL_CALL(opal_int_set_cppr,                    OPAL_INT_SET_CPPR);
 249 OPAL_CALL(opal_int_eoi,                         OPAL_INT_EOI);
 250 OPAL_CALL(opal_int_set_mfrr,                    OPAL_INT_SET_MFRR);
 251 OPAL_CALL(opal_pci_tce_kill,                    OPAL_PCI_TCE_KILL);
 252 OPAL_CALL(opal_nmmu_set_ptcr,                   OPAL_NMMU_SET_PTCR);
 253 OPAL_CALL(opal_xive_reset,                      OPAL_XIVE_RESET);
 254 OPAL_CALL(opal_xive_get_irq_info,               OPAL_XIVE_GET_IRQ_INFO);
 255 OPAL_CALL(opal_xive_get_irq_config,             OPAL_XIVE_GET_IRQ_CONFIG);
 256 OPAL_CALL(opal_xive_set_irq_config,             OPAL_XIVE_SET_IRQ_CONFIG);
 257 OPAL_CALL(opal_xive_get_queue_info,             OPAL_XIVE_GET_QUEUE_INFO);
 258 OPAL_CALL(opal_xive_set_queue_info,             OPAL_XIVE_SET_QUEUE_INFO);
 259 OPAL_CALL(opal_xive_donate_page,                OPAL_XIVE_DONATE_PAGE);
 260 OPAL_CALL(opal_xive_alloc_vp_block,             OPAL_XIVE_ALLOCATE_VP_BLOCK);
 261 OPAL_CALL(opal_xive_free_vp_block,              OPAL_XIVE_FREE_VP_BLOCK);
 262 OPAL_CALL(opal_xive_allocate_irq_raw,           OPAL_XIVE_ALLOCATE_IRQ);
 263 OPAL_CALL(opal_xive_free_irq,                   OPAL_XIVE_FREE_IRQ);
 264 OPAL_CALL(opal_xive_get_vp_info,                OPAL_XIVE_GET_VP_INFO);
 265 OPAL_CALL(opal_xive_set_vp_info,                OPAL_XIVE_SET_VP_INFO);
 266 OPAL_CALL(opal_xive_sync,                       OPAL_XIVE_SYNC);
 267 OPAL_CALL(opal_xive_dump,                       OPAL_XIVE_DUMP);
 268 OPAL_CALL(opal_xive_get_queue_state,            OPAL_XIVE_GET_QUEUE_STATE);
 269 OPAL_CALL(opal_xive_set_queue_state,            OPAL_XIVE_SET_QUEUE_STATE);
 270 OPAL_CALL(opal_xive_get_vp_state,               OPAL_XIVE_GET_VP_STATE);
 271 OPAL_CALL(opal_signal_system_reset,             OPAL_SIGNAL_SYSTEM_RESET);
 272 OPAL_CALL(opal_npu_map_lpar,                    OPAL_NPU_MAP_LPAR);
 273 OPAL_CALL(opal_imc_counters_init,               OPAL_IMC_COUNTERS_INIT);
 274 OPAL_CALL(opal_imc_counters_start,              OPAL_IMC_COUNTERS_START);
 275 OPAL_CALL(opal_imc_counters_stop,               OPAL_IMC_COUNTERS_STOP);
 276 OPAL_CALL(opal_get_powercap,                    OPAL_GET_POWERCAP);
 277 OPAL_CALL(opal_set_powercap,                    OPAL_SET_POWERCAP);
 278 OPAL_CALL(opal_get_power_shift_ratio,           OPAL_GET_POWER_SHIFT_RATIO);
 279 OPAL_CALL(opal_set_power_shift_ratio,           OPAL_SET_POWER_SHIFT_RATIO);
 280 OPAL_CALL(opal_sensor_group_clear,              OPAL_SENSOR_GROUP_CLEAR);
 281 OPAL_CALL(opal_quiesce,                         OPAL_QUIESCE);
 282 OPAL_CALL(opal_npu_spa_setup,                   OPAL_NPU_SPA_SETUP);
 283 OPAL_CALL(opal_npu_spa_clear_cache,             OPAL_NPU_SPA_CLEAR_CACHE);
 284 OPAL_CALL(opal_npu_tl_set,                      OPAL_NPU_TL_SET);
 285 OPAL_CALL(opal_pci_get_pbcq_tunnel_bar,         OPAL_PCI_GET_PBCQ_TUNNEL_BAR);
 286 OPAL_CALL(opal_pci_set_pbcq_tunnel_bar,         OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
 287 OPAL_CALL(opal_sensor_read_u64,                 OPAL_SENSOR_READ_U64);
 288 OPAL_CALL(opal_sensor_group_enable,             OPAL_SENSOR_GROUP_ENABLE);
 289 OPAL_CALL(opal_nx_coproc_init,                  OPAL_NX_COPROC_INIT);
 290 OPAL_CALL(opal_mpipl_update,                    OPAL_MPIPL_UPDATE);
 291 OPAL_CALL(opal_mpipl_register_tag,              OPAL_MPIPL_REGISTER_TAG);
 292 OPAL_CALL(opal_mpipl_query_tag,                 OPAL_MPIPL_QUERY_TAG);
 293 OPAL_CALL(opal_secvar_get,                      OPAL_SECVAR_GET);
 294 OPAL_CALL(opal_secvar_get_next,                 OPAL_SECVAR_GET_NEXT);
 295 OPAL_CALL(opal_secvar_enqueue_update,           OPAL_SECVAR_ENQUEUE_UPDATE);