# SPDX-License-Identifier: GPL-2.0## Copyright 2023 Broadcom import gdb from linux import constantsfrom linux import cpusfrom linux import utilsfrom 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()