[patch V5 07/15] scripts/gdb: Update x86 interrupts to the array based storage

[Thomas Gleixner <tglx@kernel.org>]

From: Thomas Gleixner <tglx@kernel.org>

x86 changed the interrupt statistics from a struct with individual members
to an counter array. It also provides a corresponding info array with the
strings for prefix and description and an indicator to skip the entry.

Update the already out of sync GDB script to use the counter and the info
array, which keeps the GDB script in sync automatically.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
V5: Bring the show_err_irq() back as it is used on mips
    Fix the index calculation for the show bitmap so it works with more than one
    unsigned long.
V4: Adopted to irq_stat_count_show bitmap and removed the duplicate ERR/MIS output
V3: New patch - Radu
---
 scripts/gdb/linux/interrupts.py |   81 +++++++++++-----------------------------
 1 file changed, 23 insertions(+), 58 deletions(-)
--- a/scripts/gdb/linux/interrupts.py
+++ b/scripts/gdb/linux/interrupts.py
@@ -90,71 +90,29 @@ irq_desc_type = utils.CachedType("struct
 
     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")
+def x86_show_irqstat(prec, pfx, idx, desc):
+    irq_stat = gdb.parse_and_eval("&irq_stat.counts[%d]" %idx)
     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).dereference())
-    text += "  %s\n" % (desc)
+        text += "%10u " % (stat.dereference())
+    text += desc
     return text
 
 def x86_show_interupts(prec):
-    text = x86_show_irqstat(prec, "NMI", '__nmi_count', 'Non-maskable interrupts')
+    info_type = gdb.lookup_type('struct irq_stat_info')
+    info = gdb.parse_and_eval('irq_stat_info')
+    bitmap = gdb.parse_and_eval('irq_stat_count_show')
+    bitsperlong = 8 * int(bitmap.type.target().sizeof)
 
-    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_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')
+    text = ""
+    for idx in range(int(info.type.sizeof / info_type.sizeof)):
+        show = bitmap[int(idx / bitsperlong)]
+        if not show & 1 << int(idx % bitsperlong):
+            continue
+        pfx = info[idx]['symbol'].string()
+        desc = info[idx]['text'].string()
+        text += x86_show_irqstat(prec, pfx, idx, desc)
 
     return text
 
@@ -187,6 +145,13 @@ irq_desc_type = utils.CachedType("struct
     text += "%*s: %10lu\n" % (prec, "ERR", gdb.parse_and_eval("irq_err_count"))
     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 arch_show_interrupts(prec):
     text = ""
     if utils.is_target_arch("x86"):