forked from Minki/linux
b0df898680
Conflicts: arch/arm/Kconfig.debug arch/arm/plat-versatile/Kconfig Merge fixes: arch/arm/mach-integrator/Kconfig drivers/clocksource/Kconfig
336 lines
11 KiB
Plaintext
336 lines
11 KiB
Plaintext
menu "Kernel hacking"
|
|
|
|
source "lib/Kconfig.debug"
|
|
|
|
config STRICT_DEVMEM
|
|
bool "Filter access to /dev/mem"
|
|
depends on MMU
|
|
---help---
|
|
If this option is disabled, you allow userspace (root) access to all
|
|
of memory, including kernel and userspace memory. Accidental
|
|
access to this is obviously disastrous, but specific access can
|
|
be used by people debugging the kernel.
|
|
|
|
If this option is switched on, the /dev/mem file only allows
|
|
userspace access to memory mapped peripherals.
|
|
|
|
If in doubt, say Y.
|
|
|
|
# RMK wants arm kernels compiled with frame pointers or stack unwinding.
|
|
# If you know what you are doing and are willing to live without stack
|
|
# traces, you can get a slightly smaller kernel by setting this option to
|
|
# n, but then RMK will have to kill you ;).
|
|
config FRAME_POINTER
|
|
bool
|
|
depends on !THUMB2_KERNEL
|
|
default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
|
|
help
|
|
If you say N here, the resulting kernel will be slightly smaller and
|
|
faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
|
|
when a problem occurs with the kernel, the information that is
|
|
reported is severely limited.
|
|
|
|
config ARM_UNWIND
|
|
bool "Enable stack unwinding support (EXPERIMENTAL)"
|
|
depends on AEABI && EXPERIMENTAL
|
|
default y
|
|
help
|
|
This option enables stack unwinding support in the kernel
|
|
using the information automatically generated by the
|
|
compiler. The resulting kernel image is slightly bigger but
|
|
the performance is not affected. Currently, this feature
|
|
only works with EABI compilers. If unsure say Y.
|
|
|
|
config OLD_MCOUNT
|
|
bool
|
|
depends on FUNCTION_TRACER && FRAME_POINTER
|
|
default y
|
|
|
|
config DEBUG_USER
|
|
bool "Verbose user fault messages"
|
|
help
|
|
When a user program crashes due to an exception, the kernel can
|
|
print a brief message explaining what the problem was. This is
|
|
sometimes helpful for debugging but serves no purpose on a
|
|
production system. Most people should say N here.
|
|
|
|
In addition, you need to pass user_debug=N on the kernel command
|
|
line to enable this feature. N consists of the sum of:
|
|
|
|
1 - undefined instruction events
|
|
2 - system calls
|
|
4 - invalid data aborts
|
|
8 - SIGSEGV faults
|
|
16 - SIGBUS faults
|
|
|
|
# These options are only for real kernel hackers who want to get their hands dirty.
|
|
config DEBUG_LL
|
|
bool "Kernel low-level debugging functions (read help!)"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Say Y here to include definitions of printascii, printch, printhex
|
|
in the kernel. This is helpful if you are debugging code that
|
|
executes before the console is initialized.
|
|
|
|
Note that selecting this option will limit the kernel to a single
|
|
UART definition, as specified below. Attempting to boot the kernel
|
|
image on a different platform *will not work*, so this option should
|
|
not be enabled for kernels that are intended to be portable.
|
|
|
|
choice
|
|
prompt "Kernel low-level debugging port"
|
|
depends on DEBUG_LL
|
|
|
|
config AT91_DEBUG_LL_DBGU0
|
|
bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
|
|
depends on HAVE_AT91_DBGU0
|
|
|
|
config AT91_DEBUG_LL_DBGU1
|
|
bool "Kernel low-level debugging on 9263, 9g45 and cap9"
|
|
depends on HAVE_AT91_DBGU1
|
|
|
|
config DEBUG_CLPS711X_UART1
|
|
bool "Kernel low-level debugging messages via UART1"
|
|
depends on ARCH_CLPS711X
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the first serial port on these devices.
|
|
|
|
config DEBUG_CLPS711X_UART2
|
|
bool "Kernel low-level debugging messages via UART2"
|
|
depends on ARCH_CLPS711X
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the second serial port on these devices.
|
|
|
|
config DEBUG_DC21285_PORT
|
|
bool "Kernel low-level debugging messages via footbridge serial port"
|
|
depends on FOOTBRIDGE
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the serial port in the DC21285 (Footbridge).
|
|
|
|
config DEBUG_FOOTBRIDGE_COM1
|
|
bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
|
|
depends on FOOTBRIDGE
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the 8250 at PCI COM1.
|
|
|
|
config DEBUG_HIGHBANK_UART
|
|
bool "Kernel low-level debugging messages via Highbank UART"
|
|
depends on ARCH_HIGHBANK
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the UART on Highbank based devices.
|
|
|
|
config DEBUG_IMX1_UART
|
|
bool "i.MX1 Debug UART"
|
|
depends on SOC_IMX1
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX1.
|
|
|
|
config DEBUG_IMX23_UART
|
|
bool "i.MX23 Debug UART"
|
|
depends on SOC_IMX23
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX23.
|
|
|
|
config DEBUG_IMX25_UART
|
|
bool "i.MX25 Debug UART"
|
|
depends on SOC_IMX25
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX25.
|
|
|
|
config DEBUG_IMX21_IMX27_UART
|
|
bool "i.MX21 and i.MX27 Debug UART"
|
|
depends on SOC_IMX21 || SOC_IMX27
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX21 or i.MX27.
|
|
|
|
config DEBUG_IMX28_UART
|
|
bool "i.MX28 Debug UART"
|
|
depends on SOC_IMX28
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX28.
|
|
|
|
config DEBUG_IMX31_IMX35_UART
|
|
bool "i.MX31 and i.MX35 Debug UART"
|
|
depends on SOC_IMX31 || SOC_IMX35
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX31 or i.MX35.
|
|
|
|
config DEBUG_IMX51_UART
|
|
bool "i.MX51 Debug UART"
|
|
depends on SOC_IMX51
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX51.
|
|
|
|
config DEBUG_IMX50_IMX53_UART
|
|
bool "i.MX50 and i.MX53 Debug UART"
|
|
depends on SOC_IMX50 || SOC_IMX53
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX50 or i.MX53.
|
|
|
|
config DEBUG_IMX6Q_UART
|
|
bool "i.MX6Q Debug UART"
|
|
depends on SOC_IMX6Q
|
|
help
|
|
Say Y here if you want kernel low-level debugging support
|
|
on i.MX6Q.
|
|
|
|
config DEBUG_MSM_UART1
|
|
bool "Kernel low-level debugging messages via MSM UART1"
|
|
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the first serial port on MSM devices.
|
|
|
|
config DEBUG_MSM_UART2
|
|
bool "Kernel low-level debugging messages via MSM UART2"
|
|
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the second serial port on MSM devices.
|
|
|
|
config DEBUG_MSM_UART3
|
|
bool "Kernel low-level debugging messages via MSM UART3"
|
|
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the third serial port on MSM devices.
|
|
|
|
config DEBUG_MSM8660_UART
|
|
bool "Kernel low-level debugging messages via MSM 8660 UART"
|
|
depends on ARCH_MSM8X60
|
|
select MSM_HAS_DEBUG_UART_HS
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the serial port on MSM 8660 devices.
|
|
|
|
config DEBUG_MSM8960_UART
|
|
bool "Kernel low-level debugging messages via MSM 8960 UART"
|
|
depends on ARCH_MSM8960
|
|
select MSM_HAS_DEBUG_UART_HS
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the serial port on MSM 8960 devices.
|
|
|
|
config DEBUG_REALVIEW_STD_PORT
|
|
bool "RealView Default UART"
|
|
depends on ARCH_REALVIEW
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the serial port on RealView EB, PB11MP, PBA8
|
|
and PBX platforms.
|
|
|
|
config DEBUG_REALVIEW_PB1176_PORT
|
|
bool "RealView PB1176 UART"
|
|
depends on MACH_REALVIEW_PB1176
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the standard serial port on the RealView
|
|
PB1176 platform.
|
|
|
|
config DEBUG_S3C_UART0
|
|
depends on PLAT_SAMSUNG
|
|
bool "Use S3C UART 0 for low-level debug"
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to UART 0. The port must have been initialised
|
|
by the boot-loader before use.
|
|
|
|
The uncompressor code port configuration is now handled
|
|
by CONFIG_S3C_LOWLEVEL_UART_PORT.
|
|
|
|
config DEBUG_S3C_UART1
|
|
depends on PLAT_SAMSUNG
|
|
bool "Use S3C UART 1 for low-level debug"
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to UART 1. The port must have been initialised
|
|
by the boot-loader before use.
|
|
|
|
The uncompressor code port configuration is now handled
|
|
by CONFIG_S3C_LOWLEVEL_UART_PORT.
|
|
|
|
config DEBUG_S3C_UART2
|
|
depends on PLAT_SAMSUNG
|
|
bool "Use S3C UART 2 for low-level debug"
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to UART 2. The port must have been initialised
|
|
by the boot-loader before use.
|
|
|
|
The uncompressor code port configuration is now handled
|
|
by CONFIG_S3C_LOWLEVEL_UART_PORT.
|
|
|
|
config DEBUG_LL_UART_NONE
|
|
bool "No low-level debugging UART"
|
|
help
|
|
Say Y here if your platform doesn't provide a UART option
|
|
below. This relies on your platform choosing the right UART
|
|
definition internally in order for low-level debugging to
|
|
work.
|
|
|
|
config DEBUG_ICEDCC
|
|
bool "Kernel low-level debugging via EmbeddedICE DCC channel"
|
|
help
|
|
Say Y here if you want the debug print routines to direct
|
|
their output to the EmbeddedICE macrocell's DCC channel using
|
|
co-processor 14. This is known to work on the ARM9 style ICE
|
|
channel and on the XScale with the PEEDI.
|
|
|
|
Note that the system will appear to hang during boot if there
|
|
is nothing connected to read from the DCC.
|
|
|
|
config DEBUG_SEMIHOSTING
|
|
bool "Kernel low-level debug output via semihosting I"
|
|
help
|
|
Semihosting enables code running on an ARM target to use
|
|
the I/O facilities on a host debugger/emulator through a
|
|
simple SVC calls. The host debugger or emulator must have
|
|
semihosting enabled for the special svc call to be trapped
|
|
otherwise the kernel will crash.
|
|
|
|
This is known to work with OpenOCD, as wellas
|
|
ARM's Fast Models, or any other controlling environment
|
|
that implements semihosting.
|
|
|
|
For more details about semihosting, please see
|
|
chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
|
|
|
|
endchoice
|
|
|
|
config EARLY_PRINTK
|
|
bool "Early printk"
|
|
depends on DEBUG_LL
|
|
help
|
|
Say Y here if you want to have an early console using the
|
|
kernel low-level debugging functions. Add earlyprintk to your
|
|
kernel parameters to enable this console.
|
|
|
|
config OC_ETM
|
|
bool "On-chip ETM and ETB"
|
|
depends on ARM_AMBA
|
|
help
|
|
Enables the on-chip embedded trace macrocell and embedded trace
|
|
buffer driver that will allow you to collect traces of the
|
|
kernel code.
|
|
|
|
config ARM_KPROBES_TEST
|
|
tristate "Kprobes test module"
|
|
depends on KPROBES && MODULES
|
|
help
|
|
Perform tests of kprobes API and instruction set simulation.
|
|
|
|
endmenu
|