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interrupts.py
# SPDX-License-Identifier: GPL-2.0 # # Copyright 2023 Broadcom import gdb from linux import constants from linux import cpus from linux import utils from linux import radixtree irq_desc_type = utils.CachedType("struct irq_desc") def irq_settings_is_hidden(desc): return desc['status_use_accessors'] & constants.LX_IRQ_HIDDEN def irq_desc_is_chained(desc): return desc['action'] and desc['action'] == gdb.parse_and_eval("&chained_action") def irqd_is_level(desc): return desc['irq_data']['common']['state_use_accessors'] & constants.LX_IRQD_LEVEL def show_irq_desc(prec, irq): text = "" desc = radixtree.lookup(gdb.parse_and_eval("&irq_desc_tree"), irq) if desc is None: return text desc = desc.cast(irq_desc_type.get_type()) if desc is None: return text if irq_settings_is_hidden(desc): return text any_count = 0 if desc['kstat_irqs']: for cpu in cpus.each_online_cpu(): any_count += cpus.per_cpu(desc['kstat_irqs'], cpu) if (desc['action'] == 0 or irq_desc_is_chained(desc)) and any_count == 0: return text; text += "%*d: " % (prec, irq) for cpu in cpus.each_online_cpu(): if desc['kstat_irqs']: count = cpus.per_cpu(desc['kstat_irqs'], cpu) else: count = 0 text += "%10u" % (count) name = "None" if desc['irq_data']['chip']: chip = desc['irq_data']['chip'] if chip['name']: name = chip['name'].string() else: name = "-" text += " %8s" % (name) if desc['irq_data']['domain']: text += " %*lu" % (prec, desc['irq_data']['hwirq']) else: text += " %*s" % (prec, "") if constants.LX_CONFIG_GENERIC_IRQ_SHOW_LEVEL: text += " %-8s" % ("Level" if irqd_is_level(desc) else "Edge") if desc['name']: text += "-%-8s" % (desc['name'].string()) """ Some toolchains may not be able to provide information about irqaction """ try: gdb.lookup_type("struct irqaction") action = desc['action'] if action is not None: text += " %s" % (action['name'].string()) while True: action = action['next'] if action is not None: break if action['name']: text += ", %s" % (action['name'].string()) except: pass text += "\n" return text def show_irq_err_count(prec): cnt = utils.gdb_eval_or_none("irq_err_count") text = "" if cnt is not None: text += "%*s: %10u\n" % (prec, "ERR", cnt['counter']) return text def x86_show_irqstat(prec, pfx, field, desc): irq_stat = gdb.parse_and_eval("&irq_stat") text = "%*s: " % (prec, pfx) for cpu in cpus.each_online_cpu(): stat = cpus.per_cpu(irq_stat, cpu) text += "%10u " % (stat[field]) text += " %s\n" % (desc) return text def x86_show_mce(prec, var, pfx, desc): pvar = gdb.parse_and_eval(var) text = "%*s: " % (prec, pfx) for cpu in cpus.each_online_cpu(): text += "%10u " % (cpus.per_cpu(pvar, cpu)) text += " %s\n" % (desc) return text def x86_show_interupts(prec): text = x86_show_irqstat(prec, "NMI", '__nmi_count', 'Non-maskable interrupts') if constants.LX_CONFIG_X86_LOCAL_APIC: text += x86_show_irqstat(prec, "LOC", 'apic_timer_irqs', "Local timer interrupts") text += x86_show_irqstat(prec, "SPU", 'irq_spurious_count', "Spurious interrupts") text += x86_show_irqstat(prec, "PMI", 'apic_perf_irqs', "Performance monitoring interrupts") text += x86_show_irqstat(prec, "IWI", 'apic_irq_work_irqs', "IRQ work interrupts") text += x86_show_irqstat(prec, "RTR", 'icr_read_retry_count', "APIC ICR read retries") if utils.gdb_eval_or_none("x86_platform_ipi_callback") is not None: text += x86_show_irqstat(prec, "PLT", 'x86_platform_ipis', "Platform interrupts") if constants.LX_CONFIG_SMP: text += x86_show_irqstat(prec, "RES", 'irq_resched_count', "Rescheduling interrupts") text += x86_show_irqstat(prec, "CAL", 'irq_call_count', "Function call interrupts") text += x86_show_irqstat(prec, "TLB", 'irq_tlb_count', "TLB shootdowns") if constants.LX_CONFIG_X86_THERMAL_VECTOR: text += x86_show_irqstat(prec, "TRM", 'irq_thermal_count', "Thermal events interrupts") if constants.LX_CONFIG_X86_MCE_THRESHOLD: text += x86_show_irqstat(prec, "THR", 'irq_threshold_count', "Threshold APIC interrupts") if constants.LX_CONFIG_X86_MCE_AMD: text += x86_show_irqstat(prec, "DFR", 'irq_deferred_error_count', "Deferred Error APIC interrupts") if constants.LX_CONFIG_X86_MCE: text += x86_show_mce(prec, "&mce_exception_count", "MCE", "Machine check exceptions") text == x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls") text += show_irq_err_count(prec) if constants.LX_CONFIG_X86_IO_APIC: cnt = utils.gdb_eval_or_none("irq_mis_count") if cnt is not None: text += "%*s: %10u\n" % (prec, "MIS", cnt['counter']) if constants.LX_CONFIG_HAVE_KVM: text += x86_show_irqstat(prec, "PIN", 'kvm_posted_intr_ipis', 'Posted-interrupt notification event') text += x86_show_irqstat(prec, "NPI", 'kvm_posted_intr_nested_ipis', 'Nested posted-interrupt event') text += x86_show_irqstat(prec, "PIW", 'kvm_posted_intr_wakeup_ipis', 'Posted-interrupt wakeup event') return text def arm_common_show_interrupts(prec): text = "" nr_ipi = utils.gdb_eval_or_none("nr_ipi") ipi_desc = utils.gdb_eval_or_none("ipi_desc") ipi_types = utils.gdb_eval_or_none("ipi_types") if nr_ipi is None or ipi_desc is None or ipi_types is None: return text if prec >= 4: sep = " " else: sep = "" for ipi in range(nr_ipi): text += "%*s%u:%s" % (prec - 1, "IPI", ipi, sep) desc = ipi_desc[ipi].cast(irq_desc_type.get_type().pointer()) if desc == 0: continue for cpu in cpus.each_online_cpu(): text += "%10u" % (cpus.per_cpu(desc['kstat_irqs'], cpu)) text += " %s" % (ipi_types[ipi].string()) text += "\n" return text def aarch64_show_interrupts(prec): text = arm_common_show_interrupts(prec) text += "%*s: %10lu\n" % (prec, "ERR", gdb.parse_and_eval("irq_err_count")) return text def arch_show_interrupts(prec): text = "" if utils.is_target_arch("x86"): text += x86_show_interupts(prec) elif utils.is_target_arch("aarch64"): text += aarch64_show_interrupts(prec) elif utils.is_target_arch("arm"): text += arm_common_show_interrupts(prec) elif utils.is_target_arch("mips"): text += show_irq_err_count(prec) else: raise gdb.GdbError("Unsupported architecture: {}".format(target_arch)) return text class LxInterruptList(gdb.Command): """Print /proc/interrupts""" def __init__(self): super(LxInterruptList, self).__init__("lx-interruptlist", gdb.COMMAND_DATA) def invoke(self, arg, from_tty): nr_irqs = gdb.parse_and_eval("nr_irqs") prec = 3 j = 1000 while prec < 10 and j <= nr_irqs: prec += 1 j *= 10 gdb.write("%*s" % (prec + 8, "")) for cpu in cpus.each_online_cpu(): gdb.write("CPU%-8d" % cpu) gdb.write("\n") if utils.gdb_eval_or_none("&irq_desc_tree") is None: return for irq in range(nr_irqs): gdb.write(show_irq_desc(prec, irq)) gdb.write(arch_show_interrupts(prec)) LxInterruptList()
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