From b0969d7687a7aaa82dcf2d1f245ef699387886da Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 6 Apr 2023 15:04:51 -0700 Subject: 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 Cc: Jan Kiszka Cc: Kieran Bingham Signed-off-by: Andrew Morton --- scripts/gdb/linux/constants.py.in | 14 +++ scripts/gdb/linux/interrupts.py | 232 ++++++++++++++++++++++++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 1 + 3 files changed, 247 insertions(+) create mode 100644 scripts/gdb/linux/interrupts.py (limited to 'scripts/gdb') diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in index e484e2e7e4d5..36fd2b145853 100644 --- a/scripts/gdb/linux/constants.py.in +++ b/scripts/gdb/linux/constants.py.in @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -57,6 +58,10 @@ LX_VALUE(SB_NODIRATIME) /* linux/htimer.h */ LX_GDBPARSED(hrtimer_resolution) +/* linux/irq.h */ +LX_GDBPARSED(IRQD_LEVEL) +LX_GDBPARSED(IRQ_HIDDEN) + /* linux/mount.h */ LX_VALUE(MNT_NOSUID) LX_VALUE(MNT_NODEV) @@ -85,3 +90,12 @@ LX_CONFIG(CONFIG_HIGH_RES_TIMERS) LX_CONFIG(CONFIG_NR_CPUS) LX_CONFIG(CONFIG_OF) LX_CONFIG(CONFIG_TICK_ONESHOT) +LX_CONFIG(CONFIG_GENERIC_IRQ_SHOW_LEVEL) +LX_CONFIG(CONFIG_X86_LOCAL_APIC) +LX_CONFIG(CONFIG_SMP) +LX_CONFIG(CONFIG_X86_THERMAL_VECTOR) +LX_CONFIG(CONFIG_X86_MCE_THRESHOLD) +LX_CONFIG(CONFIG_X86_MCE_AMD) +LX_CONFIG(CONFIG_X86_MCE) +LX_CONFIG(CONFIG_X86_IO_APIC) +LX_CONFIG(CONFIG_HAVE_KVM) diff --git a/scripts/gdb/linux/interrupts.py b/scripts/gdb/linux/interrupts.py new file mode 100644 index 000000000000..ef478e273791 --- /dev/null +++ b/scripts/gdb/linux/interrupts.py @@ -0,0 +1,232 @@ +# 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() diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py index 2f57adcf3dff..2a72f91059b5 100644 --- a/scripts/gdb/vmlinux-gdb.py +++ b/scripts/gdb/vmlinux-gdb.py @@ -42,3 +42,4 @@ else: import linux.device import linux.mm import linux.radixtree + import linux.interrupts -- cgit v1.2.3