commit a02b0cde8ee515ee0c8efd33e7fbe6830c282e69 upstream.

In commit 721255b9826b ("genirq: Use a maple tree for interrupt descriptor
management"), the irq_desc_tree was replaced with a sparse_irqs tree using
a maple tree structure.  Since the script looked for the irq_desc_tree
symbol which is no longer available, no interrupts would be printed and
the script output would not be useful anymore.

In addition to looking up the correct symbol (sparse_irqs), a new module
(mapletree.py) is added whose mtree_load() implementation is largely
copied after the C version and uses the same variable and intermediate
function names wherever possible to ensure that both the C and Python
version be updated in the future.

This restores the scripts' output to match that of /proc/interrupts.

Link: https://lkml.kernel.org/r/20250625021020.1056930-1-florian.fainelli@broadcom.com
Fixes: 721255b9826b ("genirq: Use a maple tree for interrupt descriptor management")
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Shanker Donthineni <sdonthineni@nvidia.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 50f4d2ba26d5c3a4687ae0569be3bbf1c8f0cbed upstream.

The per-CPU MCE interrupts are looked up by reference and need to be
de-referenced before printing, otherwise we print the addresses of the
variables instead of their contents:

MCE: 18379471554386948492   Machine check exceptions
MCP: 18379471554386948488   Machine check polls

The corrected output looks like this instead now:

MCE:          0   Machine check exceptions
MCP:          1   Machine check polls

Link: https://lkml.kernel.org/r/20250625021109.1057046-1-florian.fainelli@broadcom.com
Link: https://lkml.kernel.org/r/20250624030020.882472-1-florian.fainelli@broadcom.com
Fixes: b0969d7687a7 ("scripts/gdb: print interrupts")
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 7627b459aa0737bdd62a8591a1481cda467f20e3 upstream.

The text line would not be appended to as it should have, it should have
been a '+=' but ended up being a '==', fix that.

Link: https://lkml.kernel.org/r/20250623164153.746359-1-florian.fainelli@broadcom.com
Fixes: b0969d7687a7 ("scripts/gdb: print interrupts")
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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>