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);
296
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