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scripts/gdb: print interrupts
This GDB script prints the interrupts in the system in the same way that
/proc/interrupts does. This does include the architecture specific part
done by arch_show_interrupts() for x86, ARM, ARM64 and MIPS. Example
output from an ARM64 system:
(gdb) lx-interruptlist
CPU0 CPU1 CPU2 CPU3
10: 3167 1225 1276 2629 GICv2 30 Level arch_timer
13: 0 0 0 0 GICv2 36 Level arm-pmu
14: 0 0 0 0 GICv2 37 Level arm-pmu
15: 0 0 0 0 GICv2 38 Level arm-pmu
16: 0 0 0 0 GICv2 39 Level arm-pmu
28: 0 0 0 0 interrupt-controller@8410640 5 Edge brcmstb-gpio-wake
30: 125 0 0 0 GICv2 128 Level ttyS0
31: 0 0 0 0 interrupt-controller@8416000 0 Level mspi_done
32: 0 0 0 0 interrupt-controller@8410640 3 Edge brcmstb-waketimer
33: 0 0 0 0 interrupt-controller@8418580 8 Edge brcmstb-waketimer-rtc
34: 872 0 0 0 GICv2 230 Level brcm_scmi@0
35: 0 0 0 0 interrupt-controller@8410640 10 Edge 8d0f200.usb-phy
37: 0 0 0 0 GICv2 97 Level PCIe PME
42: 0 0 0 0 GICv2 145 Level xhci-hcd:usb1
43: 94 0 0 0 GICv2 71 Level mmc1
44: 0 0 0 0 GICv2 70 Level mmc0
IPI0: 23 666 154 98 Rescheduling interrupts
IPI1: 247 1053 1701 634 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast interrupts
IPI5: 7 9 5 0 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
ERR: 0
Link: https://lkml.kernel.org/r/20230406220451.1583239-1-f.fainelli@gmail.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Florian Fainelli
Andrew Morton
parent
8af055ae25
commit
b0969d7687
@ -15,6 +15,7 @@
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#include <linux/clk-provider.h>
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#include <linux/fs.h>
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#include <linux/hrtimer.h>
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#include <linux/irq.h>
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#include <linux/mount.h>
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#include <linux/of_fdt.h>
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#include <linux/radix-tree.h>
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@ -57,6 +58,10 @@ LX_VALUE(SB_NODIRATIME)
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/* linux/htimer.h */
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LX_GDBPARSED(hrtimer_resolution)
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/* linux/irq.h */
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LX_GDBPARSED(IRQD_LEVEL)
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LX_GDBPARSED(IRQ_HIDDEN)
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/* linux/mount.h */
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LX_VALUE(MNT_NOSUID)
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LX_VALUE(MNT_NODEV)
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@ -85,3 +90,12 @@ LX_CONFIG(CONFIG_HIGH_RES_TIMERS)
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LX_CONFIG(CONFIG_NR_CPUS)
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LX_CONFIG(CONFIG_OF)
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LX_CONFIG(CONFIG_TICK_ONESHOT)
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LX_CONFIG(CONFIG_GENERIC_IRQ_SHOW_LEVEL)
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LX_CONFIG(CONFIG_X86_LOCAL_APIC)
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LX_CONFIG(CONFIG_SMP)
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LX_CONFIG(CONFIG_X86_THERMAL_VECTOR)
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LX_CONFIG(CONFIG_X86_MCE_THRESHOLD)
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LX_CONFIG(CONFIG_X86_MCE_AMD)
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LX_CONFIG(CONFIG_X86_MCE)
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LX_CONFIG(CONFIG_X86_IO_APIC)
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LX_CONFIG(CONFIG_HAVE_KVM)
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232
scripts/gdb/linux/interrupts.py
Normal file
232
scripts/gdb/linux/interrupts.py
Normal file
@ -0,0 +1,232 @@
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright 2023 Broadcom
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import gdb
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from linux import constants
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from linux import cpus
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from linux import utils
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from linux import radixtree
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irq_desc_type = utils.CachedType("struct irq_desc")
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def irq_settings_is_hidden(desc):
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return desc['status_use_accessors'] & constants.LX_IRQ_HIDDEN
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def irq_desc_is_chained(desc):
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return desc['action'] and desc['action'] == gdb.parse_and_eval("&chained_action")
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def irqd_is_level(desc):
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return desc['irq_data']['common']['state_use_accessors'] & constants.LX_IRQD_LEVEL
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def show_irq_desc(prec, irq):
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text = ""
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desc = radixtree.lookup(gdb.parse_and_eval("&irq_desc_tree"), irq)
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if desc is None:
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return text
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desc = desc.cast(irq_desc_type.get_type())
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if desc is None:
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return text
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if irq_settings_is_hidden(desc):
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return text
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any_count = 0
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if desc['kstat_irqs']:
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for cpu in cpus.each_online_cpu():
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any_count += cpus.per_cpu(desc['kstat_irqs'], cpu)
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if (desc['action'] == 0 or irq_desc_is_chained(desc)) and any_count == 0:
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return text;
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text += "%*d: " % (prec, irq)
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for cpu in cpus.each_online_cpu():
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if desc['kstat_irqs']:
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count = cpus.per_cpu(desc['kstat_irqs'], cpu)
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else:
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count = 0
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text += "%10u" % (count)
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name = "None"
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if desc['irq_data']['chip']:
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chip = desc['irq_data']['chip']
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if chip['name']:
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name = chip['name'].string()
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else:
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name = "-"
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text += " %8s" % (name)
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if desc['irq_data']['domain']:
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text += " %*lu" % (prec, desc['irq_data']['hwirq'])
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else:
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text += " %*s" % (prec, "")
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if constants.LX_CONFIG_GENERIC_IRQ_SHOW_LEVEL:
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text += " %-8s" % ("Level" if irqd_is_level(desc) else "Edge")
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if desc['name']:
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text += "-%-8s" % (desc['name'].string())
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""" Some toolchains may not be able to provide information about irqaction """
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try:
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gdb.lookup_type("struct irqaction")
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action = desc['action']
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if action is not None:
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text += " %s" % (action['name'].string())
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while True:
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action = action['next']
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if action is not None:
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break
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if action['name']:
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text += ", %s" % (action['name'].string())
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except:
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pass
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text += "\n"
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return text
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def show_irq_err_count(prec):
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cnt = utils.gdb_eval_or_none("irq_err_count")
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text = ""
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if cnt is not None:
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text += "%*s: %10u\n" % (prec, "ERR", cnt['counter'])
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return text
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def x86_show_irqstat(prec, pfx, field, desc):
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irq_stat = gdb.parse_and_eval("&irq_stat")
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text = "%*s: " % (prec, pfx)
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for cpu in cpus.each_online_cpu():
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stat = cpus.per_cpu(irq_stat, cpu)
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text += "%10u " % (stat[field])
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text += " %s\n" % (desc)
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return text
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def x86_show_mce(prec, var, pfx, desc):
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pvar = gdb.parse_and_eval(var)
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text = "%*s: " % (prec, pfx)
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for cpu in cpus.each_online_cpu():
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text += "%10u " % (cpus.per_cpu(pvar, cpu))
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text += " %s\n" % (desc)
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return text
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def x86_show_interupts(prec):
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text = x86_show_irqstat(prec, "NMI", '__nmi_count', 'Non-maskable interrupts')
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if constants.LX_CONFIG_X86_LOCAL_APIC:
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text += x86_show_irqstat(prec, "LOC", 'apic_timer_irqs', "Local timer interrupts")
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text += x86_show_irqstat(prec, "SPU", 'irq_spurious_count', "Spurious interrupts")
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text += x86_show_irqstat(prec, "PMI", 'apic_perf_irqs', "Performance monitoring interrupts")
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text += x86_show_irqstat(prec, "IWI", 'apic_irq_work_irqs', "IRQ work interrupts")
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text += x86_show_irqstat(prec, "RTR", 'icr_read_retry_count', "APIC ICR read retries")
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if utils.gdb_eval_or_none("x86_platform_ipi_callback") is not None:
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text += x86_show_irqstat(prec, "PLT", 'x86_platform_ipis', "Platform interrupts")
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if constants.LX_CONFIG_SMP:
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text += x86_show_irqstat(prec, "RES", 'irq_resched_count', "Rescheduling interrupts")
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text += x86_show_irqstat(prec, "CAL", 'irq_call_count', "Function call interrupts")
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text += x86_show_irqstat(prec, "TLB", 'irq_tlb_count', "TLB shootdowns")
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if constants.LX_CONFIG_X86_THERMAL_VECTOR:
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text += x86_show_irqstat(prec, "TRM", 'irq_thermal_count', "Thermal events interrupts")
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if constants.LX_CONFIG_X86_MCE_THRESHOLD:
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text += x86_show_irqstat(prec, "THR", 'irq_threshold_count', "Threshold APIC interrupts")
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if constants.LX_CONFIG_X86_MCE_AMD:
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text += x86_show_irqstat(prec, "DFR", 'irq_deferred_error_count', "Deferred Error APIC interrupts")
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if constants.LX_CONFIG_X86_MCE:
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text += x86_show_mce(prec, "&mce_exception_count", "MCE", "Machine check exceptions")
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text == x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls")
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text += show_irq_err_count(prec)
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if constants.LX_CONFIG_X86_IO_APIC:
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cnt = utils.gdb_eval_or_none("irq_mis_count")
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if cnt is not None:
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text += "%*s: %10u\n" % (prec, "MIS", cnt['counter'])
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if constants.LX_CONFIG_HAVE_KVM:
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text += x86_show_irqstat(prec, "PIN", 'kvm_posted_intr_ipis', 'Posted-interrupt notification event')
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text += x86_show_irqstat(prec, "NPI", 'kvm_posted_intr_nested_ipis', 'Nested posted-interrupt event')
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text += x86_show_irqstat(prec, "PIW", 'kvm_posted_intr_wakeup_ipis', 'Posted-interrupt wakeup event')
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return text
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def arm_common_show_interrupts(prec):
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text = ""
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nr_ipi = utils.gdb_eval_or_none("nr_ipi")
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ipi_desc = utils.gdb_eval_or_none("ipi_desc")
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ipi_types = utils.gdb_eval_or_none("ipi_types")
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if nr_ipi is None or ipi_desc is None or ipi_types is None:
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return text
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if prec >= 4:
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sep = " "
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else:
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sep = ""
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for ipi in range(nr_ipi):
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text += "%*s%u:%s" % (prec - 1, "IPI", ipi, sep)
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desc = ipi_desc[ipi].cast(irq_desc_type.get_type().pointer())
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if desc == 0:
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continue
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for cpu in cpus.each_online_cpu():
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text += "%10u" % (cpus.per_cpu(desc['kstat_irqs'], cpu))
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text += " %s" % (ipi_types[ipi].string())
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text += "\n"
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return text
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def aarch64_show_interrupts(prec):
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text = arm_common_show_interrupts(prec)
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text += "%*s: %10lu\n" % (prec, "ERR", gdb.parse_and_eval("irq_err_count"))
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return text
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def arch_show_interrupts(prec):
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text = ""
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if utils.is_target_arch("x86"):
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text += x86_show_interupts(prec)
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elif utils.is_target_arch("aarch64"):
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text += aarch64_show_interrupts(prec)
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elif utils.is_target_arch("arm"):
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text += arm_common_show_interrupts(prec)
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elif utils.is_target_arch("mips"):
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text += show_irq_err_count(prec)
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else:
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raise gdb.GdbError("Unsupported architecture: {}".format(target_arch))
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return text
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class LxInterruptList(gdb.Command):
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"""Print /proc/interrupts"""
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def __init__(self):
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super(LxInterruptList, self).__init__("lx-interruptlist", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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nr_irqs = gdb.parse_and_eval("nr_irqs")
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prec = 3
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j = 1000
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while prec < 10 and j <= nr_irqs:
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prec += 1
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j *= 10
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gdb.write("%*s" % (prec + 8, ""))
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for cpu in cpus.each_online_cpu():
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gdb.write("CPU%-8d" % cpu)
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gdb.write("\n")
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if utils.gdb_eval_or_none("&irq_desc_tree") is None:
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return
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for irq in range(nr_irqs):
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gdb.write(show_irq_desc(prec, irq))
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gdb.write(arch_show_interrupts(prec))
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LxInterruptList()
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@ -42,3 +42,4 @@ else:
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import linux.device
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import linux.mm
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import linux.radixtree
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import linux.interrupts
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