| From: Florian Fainelli <f.fainelli@gmail.com> |
| Subject: scripts/gdb: print interrupts |
| Date: Thu, 6 Apr 2023 15:04:51 -0700 |
| |
| 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> |
| --- |
| |
| scripts/gdb/linux/constants.py.in | 14 + |
| scripts/gdb/linux/interrupts.py | 232 ++++++++++++++++++++++++++++ |
| scripts/gdb/vmlinux-gdb.py | 1 |
| 3 files changed, 247 insertions(+) |
| |
| --- a/scripts/gdb/linux/constants.py.in~scripts-gdb-print-interrupts |
| +++ a/scripts/gdb/linux/constants.py.in |
| @@ -15,6 +15,7 @@ |
| #include <linux/clk-provider.h> |
| #include <linux/fs.h> |
| #include <linux/hrtimer.h> |
| +#include <linux/irq.h> |
| #include <linux/mount.h> |
| #include <linux/of_fdt.h> |
| #include <linux/radix-tree.h> |
| @@ -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) |
| --- /dev/null |
| +++ a/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() |
| --- a/scripts/gdb/vmlinux-gdb.py~scripts-gdb-print-interrupts |
| +++ a/scripts/gdb/vmlinux-gdb.py |
| @@ -42,3 +42,4 @@ else: |
| import linux.device |
| import linux.mm |
| import linux.radixtree |
| + import linux.interrupts |
| _ |
