| # 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 mapletree | |
| 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, chip_width, irq): | |
| text = "" | |
| desc = mapletree.mtree_load(gdb.parse_and_eval("&sparse_irqs"), irq) | |
| if desc is None: | |
| return text | |
| desc = desc.cast(irq_desc_type.get_type().pointer()) | |
| if desc == 0: | |
| 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)['cnt'] | |
| 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)['cnt'] | |
| 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 += " %-*s" % (chip_width, 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, idx, desc): | |
| irq_stat = gdb.parse_and_eval("&irq_stat.counts[%d]" %idx) | |
| text = "%*s: " % (prec, pfx) | |
| for cpu in cpus.each_online_cpu(): | |
| stat = cpus.per_cpu(irq_stat, cpu) | |
| text += "%10u " % (stat.dereference()) | |
| text += desc | |
| return text | |
| def x86_show_interupts(prec): | |
| info_type = gdb.lookup_type('struct irq_stat_info') | |
| info = gdb.parse_and_eval('irq_stat_info') | |
| bitmap = gdb.parse_and_eval('irq_stat_count_show') | |
| bitsperlong = 8 * int(bitmap.type.target().sizeof) | |
| text = "" | |
| for idx in range(int(info.type.sizeof / info_type.sizeof)): | |
| show = bitmap[int(idx / bitsperlong)] | |
| if not show & 1 << int(idx % bitsperlong): | |
| continue | |
| pfx = info[idx]['symbol'].string() | |
| desc = info[idx]['text'].string() | |
| text += x86_show_irqstat(prec, pfx, idx, desc) | |
| 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 | |
| for ipi in range(nr_ipi): | |
| text += "%*s%u: " % (prec - 1, "IPI", ipi) | |
| 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)['cnt']) | |
| text += "%s" % (ipi_types[ipi].string()) | |
| text += "\n" | |
| return text | |
| def aarch64_show_interrupts(prec): | |
| # Does not work for ARM64 as "ipi_desc" is not available there | |
| 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("total_nr_irqs") | |
| constr = utils.gdb_eval_or_none('irq_proc_constraints') | |
| if constr: | |
| prec = int(constr['num_prec']) | |
| chip_width = int(constr['chip_width']) | |
| else: | |
| prec = 4 | |
| j = 10000 | |
| while prec < 10 and j <= nr_irqs: | |
| prec += 1 | |
| j *= 10 | |
| chip_width = 8 | |
| 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("&sparse_irqs") is None: | |
| raise gdb.GdbError("Unable to find the sparse IRQ tree, is CONFIG_SPARSE_IRQ enabled?") | |
| for irq in range(nr_irqs): | |
| gdb.write(show_irq_desc(prec, chip_width, irq)) | |
| gdb.write(arch_show_interrupts(prec)) | |
| LxInterruptList() |