1# SPDX-License-Identifier: GPL-2.0 2# 3# Copyright 2023 Broadcom 4 5import gdb 6 7from linux import constants 8from linux import cpus 9from linux import utils 10from linux import radixtree 11 12irq_desc_type = utils.CachedType("struct irq_desc") 13 14def irq_settings_is_hidden(desc): 15 return desc['status_use_accessors'] & constants.LX_IRQ_HIDDEN 16 17def irq_desc_is_chained(desc): 18 return desc['action'] and desc['action'] == gdb.parse_and_eval("&chained_action") 19 20def irqd_is_level(desc): 21 return desc['irq_data']['common']['state_use_accessors'] & constants.LX_IRQD_LEVEL 22 23def show_irq_desc(prec, irq): 24 text = "" 25 26 desc = radixtree.lookup(gdb.parse_and_eval("&irq_desc_tree"), irq) 27 if desc is None: 28 return text 29 30 desc = desc.cast(irq_desc_type.get_type()) 31 if desc is None: 32 return text 33 34 if irq_settings_is_hidden(desc): 35 return text 36 37 any_count = 0 38 if desc['kstat_irqs']: 39 for cpu in cpus.each_online_cpu(): 40 any_count += cpus.per_cpu(desc['kstat_irqs'], cpu) 41 42 if (desc['action'] == 0 or irq_desc_is_chained(desc)) and any_count == 0: 43 return text; 44 45 text += "%*d: " % (prec, irq) 46 for cpu in cpus.each_online_cpu(): 47 if desc['kstat_irqs']: 48 count = cpus.per_cpu(desc['kstat_irqs'], cpu) 49 else: 50 count = 0 51 text += "%10u" % (count) 52 53 name = "None" 54 if desc['irq_data']['chip']: 55 chip = desc['irq_data']['chip'] 56 if chip['name']: 57 name = chip['name'].string() 58 else: 59 name = "-" 60 61 text += " %8s" % (name) 62 63 if desc['irq_data']['domain']: 64 text += " %*lu" % (prec, desc['irq_data']['hwirq']) 65 else: 66 text += " %*s" % (prec, "") 67 68 if constants.LX_CONFIG_GENERIC_IRQ_SHOW_LEVEL: 69 text += " %-8s" % ("Level" if irqd_is_level(desc) else "Edge") 70 71 if desc['name']: 72 text += "-%-8s" % (desc['name'].string()) 73 74 """ Some toolchains may not be able to provide information about irqaction """ 75 try: 76 gdb.lookup_type("struct irqaction") 77 action = desc['action'] 78 if action is not None: 79 text += " %s" % (action['name'].string()) 80 while True: 81 action = action['next'] 82 if action is not None: 83 break 84 if action['name']: 85 text += ", %s" % (action['name'].string()) 86 except: 87 pass 88 89 text += "\n" 90 91 return text 92 93def show_irq_err_count(prec): 94 cnt = utils.gdb_eval_or_none("irq_err_count") 95 text = "" 96 if cnt is not None: 97 text += "%*s: %10u\n" % (prec, "ERR", cnt['counter']) 98 return text 99 100def x86_show_irqstat(prec, pfx, field, desc): 101 irq_stat = gdb.parse_and_eval("&irq_stat") 102 text = "%*s: " % (prec, pfx) 103 for cpu in cpus.each_online_cpu(): 104 stat = cpus.per_cpu(irq_stat, cpu) 105 text += "%10u " % (stat[field]) 106 text += " %s\n" % (desc) 107 return text 108 109def x86_show_mce(prec, var, pfx, desc): 110 pvar = gdb.parse_and_eval(var) 111 text = "%*s: " % (prec, pfx) 112 for cpu in cpus.each_online_cpu(): 113 text += "%10u " % (cpus.per_cpu(pvar, cpu)) 114 text += " %s\n" % (desc) 115 return text 116 117def x86_show_interupts(prec): 118 text = x86_show_irqstat(prec, "NMI", '__nmi_count', 'Non-maskable interrupts') 119 120 if constants.LX_CONFIG_X86_LOCAL_APIC: 121 text += x86_show_irqstat(prec, "LOC", 'apic_timer_irqs', "Local timer interrupts") 122 text += x86_show_irqstat(prec, "SPU", 'irq_spurious_count', "Spurious interrupts") 123 text += x86_show_irqstat(prec, "PMI", 'apic_perf_irqs', "Performance monitoring interrupts") 124 text += x86_show_irqstat(prec, "IWI", 'apic_irq_work_irqs', "IRQ work interrupts") 125 text += x86_show_irqstat(prec, "RTR", 'icr_read_retry_count', "APIC ICR read retries") 126 if utils.gdb_eval_or_none("x86_platform_ipi_callback") is not None: 127 text += x86_show_irqstat(prec, "PLT", 'x86_platform_ipis', "Platform interrupts") 128 129 if constants.LX_CONFIG_SMP: 130 text += x86_show_irqstat(prec, "RES", 'irq_resched_count', "Rescheduling interrupts") 131 text += x86_show_irqstat(prec, "CAL", 'irq_call_count', "Function call interrupts") 132 text += x86_show_irqstat(prec, "TLB", 'irq_tlb_count', "TLB shootdowns") 133 134 if constants.LX_CONFIG_X86_THERMAL_VECTOR: 135 text += x86_show_irqstat(prec, "TRM", 'irq_thermal_count', "Thermal events interrupts") 136 137 if constants.LX_CONFIG_X86_MCE_THRESHOLD: 138 text += x86_show_irqstat(prec, "THR", 'irq_threshold_count', "Threshold APIC interrupts") 139 140 if constants.LX_CONFIG_X86_MCE_AMD: 141 text += x86_show_irqstat(prec, "DFR", 'irq_deferred_error_count', "Deferred Error APIC interrupts") 142 143 if constants.LX_CONFIG_X86_MCE: 144 text += x86_show_mce(prec, "&mce_exception_count", "MCE", "Machine check exceptions") 145 text == x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls") 146 147 text += show_irq_err_count(prec) 148 149 if constants.LX_CONFIG_X86_IO_APIC: 150 cnt = utils.gdb_eval_or_none("irq_mis_count") 151 if cnt is not None: 152 text += "%*s: %10u\n" % (prec, "MIS", cnt['counter']) 153 154 if constants.LX_CONFIG_HAVE_KVM: 155 text += x86_show_irqstat(prec, "PIN", 'kvm_posted_intr_ipis', 'Posted-interrupt notification event') 156 text += x86_show_irqstat(prec, "NPI", 'kvm_posted_intr_nested_ipis', 'Nested posted-interrupt event') 157 text += x86_show_irqstat(prec, "PIW", 'kvm_posted_intr_wakeup_ipis', 'Posted-interrupt wakeup event') 158 159 return text 160 161def arm_common_show_interrupts(prec): 162 text = "" 163 nr_ipi = utils.gdb_eval_or_none("nr_ipi") 164 ipi_desc = utils.gdb_eval_or_none("ipi_desc") 165 ipi_types = utils.gdb_eval_or_none("ipi_types") 166 if nr_ipi is None or ipi_desc is None or ipi_types is None: 167 return text 168 169 if prec >= 4: 170 sep = " " 171 else: 172 sep = "" 173 174 for ipi in range(nr_ipi): 175 text += "%*s%u:%s" % (prec - 1, "IPI", ipi, sep) 176 desc = ipi_desc[ipi].cast(irq_desc_type.get_type().pointer()) 177 if desc == 0: 178 continue 179 for cpu in cpus.each_online_cpu(): 180 text += "%10u" % (cpus.per_cpu(desc['kstat_irqs'], cpu)) 181 text += " %s" % (ipi_types[ipi].string()) 182 text += "\n" 183 return text 184 185def aarch64_show_interrupts(prec): 186 text = arm_common_show_interrupts(prec) 187 text += "%*s: %10lu\n" % (prec, "ERR", gdb.parse_and_eval("irq_err_count")) 188 return text 189 190def arch_show_interrupts(prec): 191 text = "" 192 if utils.is_target_arch("x86"): 193 text += x86_show_interupts(prec) 194 elif utils.is_target_arch("aarch64"): 195 text += aarch64_show_interrupts(prec) 196 elif utils.is_target_arch("arm"): 197 text += arm_common_show_interrupts(prec) 198 elif utils.is_target_arch("mips"): 199 text += show_irq_err_count(prec) 200 else: 201 raise gdb.GdbError("Unsupported architecture: {}".format(target_arch)) 202 203 return text 204 205class LxInterruptList(gdb.Command): 206 """Print /proc/interrupts""" 207 208 def __init__(self): 209 super(LxInterruptList, self).__init__("lx-interruptlist", gdb.COMMAND_DATA) 210 211 def invoke(self, arg, from_tty): 212 nr_irqs = gdb.parse_and_eval("nr_irqs") 213 prec = 3 214 j = 1000 215 while prec < 10 and j <= nr_irqs: 216 prec += 1 217 j *= 10 218 219 gdb.write("%*s" % (prec + 8, "")) 220 for cpu in cpus.each_online_cpu(): 221 gdb.write("CPU%-8d" % cpu) 222 gdb.write("\n") 223 224 if utils.gdb_eval_or_none("&irq_desc_tree") is None: 225 return 226 227 for irq in range(nr_irqs): 228 gdb.write(show_irq_desc(prec, irq)) 229 gdb.write(arch_show_interrupts(prec)) 230 231 232LxInterruptList() 233