Quelle  opal-call.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <linux/percpu.h>
#include <linux/jump_label.h>
#include <asm/interrupt.h>
#include <asm/opal-api.h>
#include <asm/trace.h>
#include <asm/asm-prototypes.h>

#ifdef CONFIG_TRACEPOINTS
/*
 * Since the tracing code might execute OPAL calls we need to guard against
 * recursion.
 */
static DEFINE_PER_CPU(unsigned int, opal_trace_depth);

static void __trace_opal_entry(s64 a0, s64 a1, s64 a2, s64 a3,
          s64 a4, s64 a5, s64 a6, s64 a7,
          unsigned long opcode)
{
 unsigned int *depth;
 unsigned long args[8];

 depth = this_cpu_ptr(&opal_trace_depth);

 if (*depth)
  return;

 args[0] = a0;
 args[1] = a1;
 args[2] = a2;
 args[3] = a3;
 args[4] = a4;
 args[5] = a5;
 args[6] = a6;
 args[7] = a7;

 (*depth)++;
 trace_opal_entry(opcode, &args[0]);
 (*depth)--;
}

static void __trace_opal_exit(unsigned long opcode, unsigned long retval)
{
 unsigned int *depth;

 depth = this_cpu_ptr(&opal_trace_depth);

 if (*depth)
  return;

 (*depth)++;
 trace_opal_exit(opcode, retval);
 (*depth)--;
}

static DEFINE_STATIC_KEY_FALSE(opal_tracepoint_key);

int opal_tracepoint_regfunc(void)
{
 static_branch_inc(&opal_tracepoint_key);
 return 0;
}

void opal_tracepoint_unregfunc(void)
{
 static_branch_dec(&opal_tracepoint_key);
}

static s64 __opal_call_trace(s64 a0, s64 a1, s64 a2, s64 a3,
        s64 a4, s64 a5, s64 a6, s64 a7,
         unsigned long opcode, unsigned long msr)
{
 s64 ret;

 __trace_opal_entry(a0, a1, a2, a3, a4, a5, a6, a7, opcode);
 ret = __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
 __trace_opal_exit(opcode, ret);

 return ret;
}

#define DO_TRACE (static_branch_unlikely(&opal_tracepoint_key))

#else /* CONFIG_TRACEPOINTS */

static s64 __opal_call_trace(s64 a0, s64 a1, s64 a2, s64 a3,
        s64 a4, s64 a5, s64 a6, s64 a7,
         unsigned long opcode, unsigned long msr)
{
 return 0;
}

#define DO_TRACE false
#endif /* CONFIG_TRACEPOINTS */

static int64_t opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3,
      int64_t a4, int64_t a5, int64_t a6, int64_t a7, int64_t opcode)
{
 unsigned long flags;
 unsigned long msr = mfmsr();
 bool mmu = (msr & (MSR_IR|MSR_DR));
 int64_t ret;

 /* OPAL call / firmware may use SRR and/or HSRR */
 srr_regs_clobbered();

 msr &= ~MSR_EE;

 if (unlikely(!mmu))
  return __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);

 local_save_flags(flags);
 hard_irq_disable();

 if (DO_TRACE) {
  ret = __opal_call_trace(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
 } else {
  ret = __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
 }

 local_irq_restore(flags);

 return ret;
}

#define OPAL_CALL(name, opcode)     \
int64_t name(int64_t a0, int64_t a1, int64_t a2, int64_t a3, \
      int64_t a4, int64_t a5, int64_t a6, int64_t a7); \
int64_t name(int64_t a0, int64_t a1, int64_t a2, int64_t a3, \
      int64_t a4, int64_t a5, int64_t a6, int64_t a7) \
{        \
 return opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode); \
}

OPAL_CALL(opal_invalid_call,   OPAL_INVALID_CALL);
OPAL_CALL(opal_console_write,   OPAL_CONSOLE_WRITE);
OPAL_CALL(opal_console_read,   OPAL_CONSOLE_READ);
OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE);
OPAL_CALL(opal_rtc_read,   OPAL_RTC_READ);
OPAL_CALL(opal_rtc_write,   OPAL_RTC_WRITE);
OPAL_CALL(opal_cec_power_down,   OPAL_CEC_POWER_DOWN);
OPAL_CALL(opal_cec_reboot,   OPAL_CEC_REBOOT);
OPAL_CALL(opal_cec_reboot2,   OPAL_CEC_REBOOT2);
OPAL_CALL(opal_read_nvram,   OPAL_READ_NVRAM);
OPAL_CALL(opal_write_nvram,   OPAL_WRITE_NVRAM);
OPAL_CALL(opal_handle_interrupt,  OPAL_HANDLE_INTERRUPT);
OPAL_CALL(opal_poll_events,   OPAL_POLL_EVENTS);
OPAL_CALL(opal_pci_set_hub_tce_memory,  OPAL_PCI_SET_HUB_TCE_MEMORY);
OPAL_CALL(opal_pci_set_phb_tce_memory,  OPAL_PCI_SET_PHB_TCE_MEMORY);
OPAL_CALL(opal_pci_config_read_byte,  OPAL_PCI_CONFIG_READ_BYTE);
OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD);
OPAL_CALL(opal_pci_config_read_word,  OPAL_PCI_CONFIG_READ_WORD);
OPAL_CALL(opal_pci_config_write_byte,  OPAL_PCI_CONFIG_WRITE_BYTE);
OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD);
OPAL_CALL(opal_pci_config_write_word,  OPAL_PCI_CONFIG_WRITE_WORD);
OPAL_CALL(opal_set_xive,   OPAL_SET_XIVE);
OPAL_CALL(opal_get_xive,   OPAL_GET_XIVE);
OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER);
OPAL_CALL(opal_pci_eeh_freeze_status,  OPAL_PCI_EEH_FREEZE_STATUS);
OPAL_CALL(opal_pci_eeh_freeze_clear,  OPAL_PCI_EEH_FREEZE_CLEAR);
OPAL_CALL(opal_pci_eeh_freeze_set,  OPAL_PCI_EEH_FREEZE_SET);
OPAL_CALL(opal_pci_err_inject,   OPAL_PCI_ERR_INJECT);
OPAL_CALL(opal_pci_shpc,   OPAL_PCI_SHPC);
OPAL_CALL(opal_pci_phb_mmio_enable,  OPAL_PCI_PHB_MMIO_ENABLE);
OPAL_CALL(opal_pci_set_phb_mem_window,  OPAL_PCI_SET_PHB_MEM_WINDOW);
OPAL_CALL(opal_pci_map_pe_mmio_window,  OPAL_PCI_MAP_PE_MMIO_WINDOW);
OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY);
OPAL_CALL(opal_pci_set_pe,   OPAL_PCI_SET_PE);
OPAL_CALL(opal_pci_set_peltv,   OPAL_PCI_SET_PELTV);
OPAL_CALL(opal_pci_get_xive_reissue,  OPAL_PCI_GET_XIVE_REISSUE);
OPAL_CALL(opal_pci_set_xive_reissue,  OPAL_PCI_SET_XIVE_REISSUE);
OPAL_CALL(opal_pci_set_xive_pe,   OPAL_PCI_SET_XIVE_PE);
OPAL_CALL(opal_get_xive_source,   OPAL_GET_XIVE_SOURCE);
OPAL_CALL(opal_get_msi_32,   OPAL_GET_MSI_32);
OPAL_CALL(opal_get_msi_64,   OPAL_GET_MSI_64);
OPAL_CALL(opal_start_cpu,   OPAL_START_CPU);
OPAL_CALL(opal_query_cpu_status,  OPAL_QUERY_CPU_STATUS);
OPAL_CALL(opal_write_oppanel,   OPAL_WRITE_OPPANEL);
OPAL_CALL(opal_pci_map_pe_dma_window,  OPAL_PCI_MAP_PE_DMA_WINDOW);
OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
OPAL_CALL(opal_pci_reset,   OPAL_PCI_RESET);
OPAL_CALL(opal_pci_get_hub_diag_data,  OPAL_PCI_GET_HUB_DIAG_DATA);
OPAL_CALL(opal_pci_get_phb_diag_data,  OPAL_PCI_GET_PHB_DIAG_DATA);
OPAL_CALL(opal_pci_fence_phb,   OPAL_PCI_FENCE_PHB);
OPAL_CALL(opal_pci_reinit,   OPAL_PCI_REINIT);
OPAL_CALL(opal_pci_mask_pe_error,  OPAL_PCI_MASK_PE_ERROR);
OPAL_CALL(opal_set_slot_led_status,  OPAL_SET_SLOT_LED_STATUS);
OPAL_CALL(opal_get_epow_status,   OPAL_GET_EPOW_STATUS);
OPAL_CALL(opal_get_dpo_status,   OPAL_GET_DPO_STATUS);
OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED);
OPAL_CALL(opal_pci_next_error,   OPAL_PCI_NEXT_ERROR);
OPAL_CALL(opal_pci_poll,   OPAL_PCI_POLL);
OPAL_CALL(opal_pci_msi_eoi,   OPAL_PCI_MSI_EOI);
OPAL_CALL(opal_pci_get_phb_diag_data2,  OPAL_PCI_GET_PHB_DIAG_DATA2);
OPAL_CALL(opal_xscom_read,   OPAL_XSCOM_READ);
OPAL_CALL(opal_xscom_write,   OPAL_XSCOM_WRITE);
OPAL_CALL(opal_lpc_read,   OPAL_LPC_READ);
OPAL_CALL(opal_lpc_write,   OPAL_LPC_WRITE);
OPAL_CALL(opal_return_cpu,   OPAL_RETURN_CPU);
OPAL_CALL(opal_reinit_cpus,   OPAL_REINIT_CPUS);
OPAL_CALL(opal_read_elog,   OPAL_ELOG_READ);
OPAL_CALL(opal_send_ack_elog,   OPAL_ELOG_ACK);
OPAL_CALL(opal_get_elog_size,   OPAL_ELOG_SIZE);
OPAL_CALL(opal_resend_pending_logs,  OPAL_ELOG_RESEND);
OPAL_CALL(opal_write_elog,   OPAL_ELOG_WRITE);
OPAL_CALL(opal_validate_flash,   OPAL_FLASH_VALIDATE);
OPAL_CALL(opal_manage_flash,   OPAL_FLASH_MANAGE);
OPAL_CALL(opal_update_flash,   OPAL_FLASH_UPDATE);
OPAL_CALL(opal_resync_timebase,   OPAL_RESYNC_TIMEBASE);
OPAL_CALL(opal_check_token,   OPAL_CHECK_TOKEN);
OPAL_CALL(opal_dump_init,   OPAL_DUMP_INIT);
OPAL_CALL(opal_dump_info,   OPAL_DUMP_INFO);
OPAL_CALL(opal_dump_info2,   OPAL_DUMP_INFO2);
OPAL_CALL(opal_dump_read,   OPAL_DUMP_READ);
OPAL_CALL(opal_dump_ack,   OPAL_DUMP_ACK);
OPAL_CALL(opal_get_msg,    OPAL_GET_MSG);
OPAL_CALL(opal_write_oppanel_async,  OPAL_WRITE_OPPANEL_ASYNC);
OPAL_CALL(opal_check_completion,  OPAL_CHECK_ASYNC_COMPLETION);
OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND);
OPAL_CALL(opal_sync_host_reboot,  OPAL_SYNC_HOST_REBOOT);
OPAL_CALL(opal_sensor_read,   OPAL_SENSOR_READ);
OPAL_CALL(opal_get_param,   OPAL_GET_PARAM);
OPAL_CALL(opal_set_param,   OPAL_SET_PARAM);
OPAL_CALL(opal_handle_hmi,   OPAL_HANDLE_HMI);
OPAL_CALL(opal_handle_hmi2,   OPAL_HANDLE_HMI2);
OPAL_CALL(opal_config_cpu_idle_state,  OPAL_CONFIG_CPU_IDLE_STATE);
OPAL_CALL(opal_slw_set_reg,   OPAL_SLW_SET_REG);
OPAL_CALL(opal_register_dump_region,  OPAL_REGISTER_DUMP_REGION);
OPAL_CALL(opal_unregister_dump_region,  OPAL_UNREGISTER_DUMP_REGION);
OPAL_CALL(opal_pci_set_phb_cxl_mode,  OPAL_PCI_SET_PHB_CAPI_MODE);
OPAL_CALL(opal_tpo_write,   OPAL_WRITE_TPO);
OPAL_CALL(opal_tpo_read,   OPAL_READ_TPO);
OPAL_CALL(opal_ipmi_send,   OPAL_IPMI_SEND);
OPAL_CALL(opal_ipmi_recv,   OPAL_IPMI_RECV);
OPAL_CALL(opal_i2c_request,   OPAL_I2C_REQUEST);
OPAL_CALL(opal_flash_read,   OPAL_FLASH_READ);
OPAL_CALL(opal_flash_write,   OPAL_FLASH_WRITE);
OPAL_CALL(opal_flash_erase,   OPAL_FLASH_ERASE);
OPAL_CALL(opal_prd_msg,    OPAL_PRD_MSG);
OPAL_CALL(opal_leds_get_ind,   OPAL_LEDS_GET_INDICATOR);
OPAL_CALL(opal_leds_set_ind,   OPAL_LEDS_SET_INDICATOR);
OPAL_CALL(opal_console_flush,   OPAL_CONSOLE_FLUSH);
OPAL_CALL(opal_get_device_tree,   OPAL_GET_DEVICE_TREE);
OPAL_CALL(opal_pci_get_presence_state,  OPAL_PCI_GET_PRESENCE_STATE);
OPAL_CALL(opal_pci_get_power_state,  OPAL_PCI_GET_POWER_STATE);
OPAL_CALL(opal_pci_set_power_state,  OPAL_PCI_SET_POWER_STATE);
OPAL_CALL(opal_int_get_xirr,   OPAL_INT_GET_XIRR);
OPAL_CALL(opal_int_set_cppr,   OPAL_INT_SET_CPPR);
OPAL_CALL(opal_int_eoi,    OPAL_INT_EOI);
OPAL_CALL(opal_int_set_mfrr,   OPAL_INT_SET_MFRR);
OPAL_CALL(opal_pci_tce_kill,   OPAL_PCI_TCE_KILL);
OPAL_CALL(opal_nmmu_set_ptcr,   OPAL_NMMU_SET_PTCR);
OPAL_CALL(opal_xive_reset,   OPAL_XIVE_RESET);
OPAL_CALL(opal_xive_get_irq_info,  OPAL_XIVE_GET_IRQ_INFO);
OPAL_CALL(opal_xive_get_irq_config,  OPAL_XIVE_GET_IRQ_CONFIG);
OPAL_CALL(opal_xive_set_irq_config,  OPAL_XIVE_SET_IRQ_CONFIG);
OPAL_CALL(opal_xive_get_queue_info,  OPAL_XIVE_GET_QUEUE_INFO);
OPAL_CALL(opal_xive_set_queue_info,  OPAL_XIVE_SET_QUEUE_INFO);
OPAL_CALL(opal_xive_donate_page,  OPAL_XIVE_DONATE_PAGE);
OPAL_CALL(opal_xive_alloc_vp_block,  OPAL_XIVE_ALLOCATE_VP_BLOCK);
OPAL_CALL(opal_xive_free_vp_block,  OPAL_XIVE_FREE_VP_BLOCK);
OPAL_CALL(opal_xive_allocate_irq_raw,  OPAL_XIVE_ALLOCATE_IRQ);
OPAL_CALL(opal_xive_free_irq,   OPAL_XIVE_FREE_IRQ);
OPAL_CALL(opal_xive_get_vp_info,  OPAL_XIVE_GET_VP_INFO);
OPAL_CALL(opal_xive_set_vp_info,  OPAL_XIVE_SET_VP_INFO);
OPAL_CALL(opal_xive_sync,   OPAL_XIVE_SYNC);
OPAL_CALL(opal_xive_dump,   OPAL_XIVE_DUMP);
OPAL_CALL(opal_xive_get_queue_state,  OPAL_XIVE_GET_QUEUE_STATE);
OPAL_CALL(opal_xive_set_queue_state,  OPAL_XIVE_SET_QUEUE_STATE);
OPAL_CALL(opal_xive_get_vp_state,  OPAL_XIVE_GET_VP_STATE);
OPAL_CALL(opal_signal_system_reset,  OPAL_SIGNAL_SYSTEM_RESET);
OPAL_CALL(opal_npu_map_lpar,   OPAL_NPU_MAP_LPAR);
OPAL_CALL(opal_imc_counters_init,  OPAL_IMC_COUNTERS_INIT);
OPAL_CALL(opal_imc_counters_start,  OPAL_IMC_COUNTERS_START);
OPAL_CALL(opal_imc_counters_stop,  OPAL_IMC_COUNTERS_STOP);
OPAL_CALL(opal_get_powercap,   OPAL_GET_POWERCAP);
OPAL_CALL(opal_set_powercap,   OPAL_SET_POWERCAP);
OPAL_CALL(opal_get_power_shift_ratio,  OPAL_GET_POWER_SHIFT_RATIO);
OPAL_CALL(opal_set_power_shift_ratio,  OPAL_SET_POWER_SHIFT_RATIO);
OPAL_CALL(opal_sensor_group_clear,  OPAL_SENSOR_GROUP_CLEAR);
OPAL_CALL(opal_quiesce,    OPAL_QUIESCE);
OPAL_CALL(opal_npu_spa_setup,   OPAL_NPU_SPA_SETUP);
OPAL_CALL(opal_npu_spa_clear_cache,  OPAL_NPU_SPA_CLEAR_CACHE);
OPAL_CALL(opal_npu_tl_set,   OPAL_NPU_TL_SET);
OPAL_CALL(opal_pci_get_pbcq_tunnel_bar,  OPAL_PCI_GET_PBCQ_TUNNEL_BAR);
OPAL_CALL(opal_pci_set_pbcq_tunnel_bar,  OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
OPAL_CALL(opal_sensor_read_u64,   OPAL_SENSOR_READ_U64);
OPAL_CALL(opal_sensor_group_enable,  OPAL_SENSOR_GROUP_ENABLE);
OPAL_CALL(opal_nx_coproc_init,   OPAL_NX_COPROC_INIT);
OPAL_CALL(opal_mpipl_update,   OPAL_MPIPL_UPDATE);
OPAL_CALL(opal_mpipl_register_tag,  OPAL_MPIPL_REGISTER_TAG);
OPAL_CALL(opal_mpipl_query_tag,   OPAL_MPIPL_QUERY_TAG);
OPAL_CALL(opal_secvar_get,   OPAL_SECVAR_GET);
OPAL_CALL(opal_secvar_get_next,   OPAL_SECVAR_GET_NEXT);
OPAL_CALL(opal_secvar_enqueue_update,  OPAL_SECVAR_ENQUEUE_UPDATE);