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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

Florian Fainelli committed 3 years ago

Commit b0969d71 parent 8af055a3 files · +247 −0Browse files

Unified · Split

3 files
  1. scripts/gdb/linux/constants.py.in +14 −0
  2. scripts/gdb/linux/interrupts.py +232 −0
  3. scripts/gdb/vmlinux-gdb.py +1 −0
scripts/gdb/linux/constants.py.in+14−0
@@ -15,6 +15,7 @@ · 14 unmodified lines
15#include <linux/clk-provider.h>15#include <linux/clk-provider.h>
16#include <linux/fs.h>16#include <linux/fs.h>
17#include <linux/hrtimer.h>17#include <linux/hrtimer.h>
18#include <linux/irq.h>
18#include <linux/mount.h>19#include <linux/mount.h>
19#include <linux/of_fdt.h>20#include <linux/of_fdt.h>
20#include <linux/radix-tree.h>21#include <linux/radix-tree.h>
@@ -57,6 +58,10 @@ LX_VALUE(SB_NODIRATIME) · 36 unmodified lines
57/* linux/htimer.h */58/* linux/htimer.h */
58LX_GDBPARSED(hrtimer_resolution)59LX_GDBPARSED(hrtimer_resolution)
59 60
61/* linux/irq.h */
62LX_GDBPARSED(IRQD_LEVEL)
63LX_GDBPARSED(IRQ_HIDDEN)
64
60/* linux/mount.h */65/* linux/mount.h */
61LX_VALUE(MNT_NOSUID)66LX_VALUE(MNT_NOSUID)
62LX_VALUE(MNT_NODEV)67LX_VALUE(MNT_NODEV)
@@ -85,3 +90,12 @@ LX_CONFIG(CONFIG_HIGH_RES_TIMERS) · 22 unmodified lines
85LX_CONFIG(CONFIG_NR_CPUS)90LX_CONFIG(CONFIG_NR_CPUS)
86LX_CONFIG(CONFIG_OF)91LX_CONFIG(CONFIG_OF)
87LX_CONFIG(CONFIG_TICK_ONESHOT)92LX_CONFIG(CONFIG_TICK_ONESHOT)
93LX_CONFIG(CONFIG_GENERIC_IRQ_SHOW_LEVEL)
94LX_CONFIG(CONFIG_X86_LOCAL_APIC)
95LX_CONFIG(CONFIG_SMP)
96LX_CONFIG(CONFIG_X86_THERMAL_VECTOR)
97LX_CONFIG(CONFIG_X86_MCE_THRESHOLD)
98LX_CONFIG(CONFIG_X86_MCE_AMD)
99LX_CONFIG(CONFIG_X86_MCE)
100LX_CONFIG(CONFIG_X86_IO_APIC)
101LX_CONFIG(CONFIG_HAVE_KVM)
scripts/gdb/linux/interrupts.py+232−0
@@ -0,0 +1,232 @@
1# SPDX-License-Identifier: GPL-2.0
2#
3# Copyright 2023 Broadcom
4
5import gdb
6
7from linux import constants
8from linux import cpus
9from linux import utils
10from linux import radixtree
11
12irq_desc_type = utils.CachedType("struct irq_desc")
13
14def irq_settings_is_hidden(desc):
15 return desc['status_use_accessors'] & constants.LX_IRQ_HIDDEN
16
17def irq_desc_is_chained(desc):
18 return desc['action'] and desc['action'] == gdb.parse_and_eval("&chained_action")
19
20def irqd_is_level(desc):
21 return desc['irq_data']['common']['state_use_accessors'] & constants.LX_IRQD_LEVEL
22
23def show_irq_desc(prec, irq):
24 text = ""
25
26 desc = radixtree.lookup(gdb.parse_and_eval("&irq_desc_tree"), irq)
27 if desc is None:
28 return text
29
30 desc = desc.cast(irq_desc_type.get_type())
31 if desc is None:
32 return text
33
34 if irq_settings_is_hidden(desc):
35 return text
36
37 any_count = 0
38 if desc['kstat_irqs']:
39 for cpu in cpus.each_online_cpu():
40 any_count += cpus.per_cpu(desc['kstat_irqs'], cpu)
41
42 if (desc['action'] == 0 or irq_desc_is_chained(desc)) and any_count == 0:
43 return text;
44
45 text += "%*d: " % (prec, irq)
46 for cpu in cpus.each_online_cpu():
47 if desc['kstat_irqs']:
48 count = cpus.per_cpu(desc['kstat_irqs'], cpu)
49 else:
50 count = 0
51 text += "%10u" % (count)
52
53 name = "None"
54 if desc['irq_data']['chip']:
55 chip = desc['irq_data']['chip']
56 if chip['name']:
57 name = chip['name'].string()
58 else:
59 name = "-"
60
61 text += " %8s" % (name)
62
63 if desc['irq_data']['domain']:
64 text += " %*lu" % (prec, desc['irq_data']['hwirq'])
65 else:
66 text += " %*s" % (prec, "")
67
68 if constants.LX_CONFIG_GENERIC_IRQ_SHOW_LEVEL:
69 text += " %-8s" % ("Level" if irqd_is_level(desc) else "Edge")
70
71 if desc['name']:
72 text += "-%-8s" % (desc['name'].string())
73
74 """ Some toolchains may not be able to provide information about irqaction """
75 try:
76 gdb.lookup_type("struct irqaction")
77 action = desc['action']
78 if action is not None:
79 text += " %s" % (action['name'].string())
80 while True:
81 action = action['next']
82 if action is not None:
83 break
84 if action['name']:
85 text += ", %s" % (action['name'].string())
86 except:
87 pass
88
89 text += "\n"
90
91 return text
92
93def show_irq_err_count(prec):
94 cnt = utils.gdb_eval_or_none("irq_err_count")
95 text = ""
96 if cnt is not None:
97 text += "%*s: %10u\n" % (prec, "ERR", cnt['counter'])
98 return text
99
100def x86_show_irqstat(prec, pfx, field, desc):
101 irq_stat = gdb.parse_and_eval("&irq_stat")
102 text = "%*s: " % (prec, pfx)
103 for cpu in cpus.each_online_cpu():
104 stat = cpus.per_cpu(irq_stat, cpu)
105 text += "%10u " % (stat[field])
106 text += " %s\n" % (desc)
107 return text
108
109def x86_show_mce(prec, var, pfx, desc):
110 pvar = gdb.parse_and_eval(var)
111 text = "%*s: " % (prec, pfx)
112 for cpu in cpus.each_online_cpu():
113 text += "%10u " % (cpus.per_cpu(pvar, cpu))
114 text += " %s\n" % (desc)
115 return text
116
117def x86_show_interupts(prec):
118 text = x86_show_irqstat(prec, "NMI", '__nmi_count', 'Non-maskable interrupts')
119
120 if constants.LX_CONFIG_X86_LOCAL_APIC:
121 text += x86_show_irqstat(prec, "LOC", 'apic_timer_irqs', "Local timer interrupts")
122 text += x86_show_irqstat(prec, "SPU", 'irq_spurious_count', "Spurious interrupts")
123 text += x86_show_irqstat(prec, "PMI", 'apic_perf_irqs', "Performance monitoring interrupts")
124 text += x86_show_irqstat(prec, "IWI", 'apic_irq_work_irqs', "IRQ work interrupts")
125 text += x86_show_irqstat(prec, "RTR", 'icr_read_retry_count', "APIC ICR read retries")
126 if utils.gdb_eval_or_none("x86_platform_ipi_callback") is not None:
127 text += x86_show_irqstat(prec, "PLT", 'x86_platform_ipis', "Platform interrupts")
128
129 if constants.LX_CONFIG_SMP:
130 text += x86_show_irqstat(prec, "RES", 'irq_resched_count', "Rescheduling interrupts")
131 text += x86_show_irqstat(prec, "CAL", 'irq_call_count', "Function call interrupts")
132 text += x86_show_irqstat(prec, "TLB", 'irq_tlb_count', "TLB shootdowns")
133
134 if constants.LX_CONFIG_X86_THERMAL_VECTOR:
135 text += x86_show_irqstat(prec, "TRM", 'irq_thermal_count', "Thermal events interrupts")
136
137 if constants.LX_CONFIG_X86_MCE_THRESHOLD:
138 text += x86_show_irqstat(prec, "THR", 'irq_threshold_count', "Threshold APIC interrupts")
139
140 if constants.LX_CONFIG_X86_MCE_AMD:
141 text += x86_show_irqstat(prec, "DFR", 'irq_deferred_error_count', "Deferred Error APIC interrupts")
142
143 if constants.LX_CONFIG_X86_MCE:
144 text += x86_show_mce(prec, "&mce_exception_count", "MCE", "Machine check exceptions")
145 text == x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls")
146
147 text += show_irq_err_count(prec)
148
149 if constants.LX_CONFIG_X86_IO_APIC:
150 cnt = utils.gdb_eval_or_none("irq_mis_count")
151 if cnt is not None:
152 text += "%*s: %10u\n" % (prec, "MIS", cnt['counter'])
153
154 if constants.LX_CONFIG_HAVE_KVM:
155 text += x86_show_irqstat(prec, "PIN", 'kvm_posted_intr_ipis', 'Posted-interrupt notification event')
156 text += x86_show_irqstat(prec, "NPI", 'kvm_posted_intr_nested_ipis', 'Nested posted-interrupt event')
157 text += x86_show_irqstat(prec, "PIW", 'kvm_posted_intr_wakeup_ipis', 'Posted-interrupt wakeup event')
158
159 return text
160
161def arm_common_show_interrupts(prec):
162 text = ""
163 nr_ipi = utils.gdb_eval_or_none("nr_ipi")
164 ipi_desc = utils.gdb_eval_or_none("ipi_desc")
165 ipi_types = utils.gdb_eval_or_none("ipi_types")
166 if nr_ipi is None or ipi_desc is None or ipi_types is None:
167 return text
168
169 if prec >= 4:
170 sep = " "
171 else:
172 sep = ""
173
174 for ipi in range(nr_ipi):
175 text += "%*s%u:%s" % (prec - 1, "IPI", ipi, sep)
176 desc = ipi_desc[ipi].cast(irq_desc_type.get_type().pointer())
177 if desc == 0:
178 continue
179 for cpu in cpus.each_online_cpu():
180 text += "%10u" % (cpus.per_cpu(desc['kstat_irqs'], cpu))
181 text += " %s" % (ipi_types[ipi].string())
182 text += "\n"
183 return text
184
185def aarch64_show_interrupts(prec):
186 text = arm_common_show_interrupts(prec)
187 text += "%*s: %10lu\n" % (prec, "ERR", gdb.parse_and_eval("irq_err_count"))
188 return text
189
190def arch_show_interrupts(prec):
191 text = ""
192 if utils.is_target_arch("x86"):
193 text += x86_show_interupts(prec)
194 elif utils.is_target_arch("aarch64"):
195 text += aarch64_show_interrupts(prec)
196 elif utils.is_target_arch("arm"):
197 text += arm_common_show_interrupts(prec)
198 elif utils.is_target_arch("mips"):
199 text += show_irq_err_count(prec)
200 else:
201 raise gdb.GdbError("Unsupported architecture: {}".format(target_arch))
202
203 return text
204
205class LxInterruptList(gdb.Command):
206 """Print /proc/interrupts"""
207
208 def __init__(self):
209 super(LxInterruptList, self).__init__("lx-interruptlist", gdb.COMMAND_DATA)
210
211 def invoke(self, arg, from_tty):
212 nr_irqs = gdb.parse_and_eval("nr_irqs")
213 prec = 3
214 j = 1000
215 while prec < 10 and j <= nr_irqs:
216 prec += 1
217 j *= 10
218
219 gdb.write("%*s" % (prec + 8, ""))
220 for cpu in cpus.each_online_cpu():
221 gdb.write("CPU%-8d" % cpu)
222 gdb.write("\n")
223
224 if utils.gdb_eval_or_none("&irq_desc_tree") is None:
225 return
226
227 for irq in range(nr_irqs):
228 gdb.write(show_irq_desc(prec, irq))
229 gdb.write(arch_show_interrupts(prec))
230
231
232LxInterruptList()
scripts/gdb/vmlinux-gdb.py+1−0
@@ -42,3 +42,4 @@ else: · 41 unmodified lines
42 import linux.device42 import linux.device
43 import linux.mm43 import linux.mm
44 import linux.radixtree44 import linux.radixtree
45 import linux.interrupts

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