# 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()