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# 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()
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