574 lines
18 KiB
Plaintext
Executable File
574 lines
18 KiB
Plaintext
Executable File
menu "Kernel hacking"
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source "lib/Kconfig.debug"
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config STRICT_DEVMEM
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bool "Filter access to /dev/mem"
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depends on MMU
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---help---
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If this option is disabled, you allow userspace (root) access to all
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of memory, including kernel and userspace memory. Accidental
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access to this is obviously disastrous, but specific access can
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be used by people debugging the kernel.
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If this option is switched on, the /dev/mem file only allows
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userspace access to memory mapped peripherals.
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If in doubt, say Y.
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# RMK wants arm kernels compiled with frame pointers or stack unwinding.
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# If you know what you are doing and are willing to live without stack
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# traces, you can get a slightly smaller kernel by setting this option to
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# n, but then RMK will have to kill you ;).
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config FRAME_POINTER
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bool
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depends on !THUMB2_KERNEL
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default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
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help
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If you say N here, the resulting kernel will be slightly smaller and
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faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
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when a problem occurs with the kernel, the information that is
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reported is severely limited.
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config ARM_UNWIND
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bool "Enable stack unwinding support (EXPERIMENTAL)"
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depends on AEABI && EXPERIMENTAL
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default y
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help
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This option enables stack unwinding support in the kernel
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using the information automatically generated by the
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compiler. The resulting kernel image is slightly bigger but
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the performance is not affected. Currently, this feature
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only works with EABI compilers. If unsure say Y.
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config OLD_MCOUNT
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bool
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depends on FUNCTION_TRACER && FRAME_POINTER
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default y
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config DEBUG_USER
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bool "Verbose user fault messages"
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help
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When a user program crashes due to an exception, the kernel can
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print a brief message explaining what the problem was. This is
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sometimes helpful for debugging but serves no purpose on a
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production system. Most people should say N here.
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In addition, you need to pass user_debug=N on the kernel command
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line to enable this feature. N consists of the sum of:
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1 - undefined instruction events
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2 - system calls
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4 - invalid data aborts
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8 - SIGSEGV faults
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16 - SIGBUS faults
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config FORCE_PAGES
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bool "Force lowmem to be mapped with 4K pages"
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help
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There are some advanced debug features that can only be done when
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memory is mapped with pages instead of sections. Enable this option
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to always map lowmem pages with pages. This may have a performance
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cost due to increased TLB pressure.
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If unsure say N.
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config FREE_PAGES_RDONLY
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bool "Set pages as read only while on the buddy list"
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select FORCE_PAGES
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select PAGE_POISONING
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help
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Pages are always mapped in the kernel. This means that anyone
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can write to the page if they have the address. Enable this option
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to mark pages as read only to trigger a fault if any code attempts
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to write to a page on the buddy list. This may have a performance
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impact.
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If unsure, say N.
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# These options are only for real kernel hackers who want to get their hands dirty.
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config DEBUG_LL
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bool "Kernel low-level debugging functions (read help!)"
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depends on DEBUG_KERNEL
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help
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Say Y here to include definitions of printascii, printch, printhex
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in the kernel. This is helpful if you are debugging code that
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executes before the console is initialized.
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Note that selecting this option will limit the kernel to a single
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UART definition, as specified below. Attempting to boot the kernel
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image on a different platform *will not work*, so this option should
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not be enabled for kernels that are intended to be portable.
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choice
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prompt "Kernel low-level debugging port"
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depends on DEBUG_LL
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config AT91_DEBUG_LL_DBGU0
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bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
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depends on HAVE_AT91_DBGU0
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config AT91_DEBUG_LL_DBGU1
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bool "Kernel low-level debugging on 9263 and 9g45"
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depends on HAVE_AT91_DBGU1
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config DEBUG_CLPS711X_UART1
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bool "Kernel low-level debugging messages via UART1"
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depends on ARCH_CLPS711X
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help
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Say Y here if you want the debug print routines to direct
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their output to the first serial port on these devices.
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config DEBUG_CLPS711X_UART2
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bool "Kernel low-level debugging messages via UART2"
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depends on ARCH_CLPS711X
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help
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Say Y here if you want the debug print routines to direct
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their output to the second serial port on these devices.
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config DEBUG_DC21285_PORT
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bool "Kernel low-level debugging messages via footbridge serial port"
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depends on FOOTBRIDGE
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help
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Say Y here if you want the debug print routines to direct
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their output to the serial port in the DC21285 (Footbridge).
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config DEBUG_FOOTBRIDGE_COM1
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bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
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depends on FOOTBRIDGE
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help
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Say Y here if you want the debug print routines to direct
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their output to the 8250 at PCI COM1.
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config DEBUG_HIGHBANK_UART
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bool "Kernel low-level debugging messages via Highbank UART"
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depends on ARCH_HIGHBANK
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help
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Say Y here if you want the debug print routines to direct
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their output to the UART on Highbank based devices.
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config DEBUG_IMX1_UART
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bool "i.MX1 Debug UART"
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depends on SOC_IMX1
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX1.
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config DEBUG_IMX23_UART
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bool "i.MX23 Debug UART"
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depends on SOC_IMX23
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX23.
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config DEBUG_IMX25_UART
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bool "i.MX25 Debug UART"
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depends on SOC_IMX25
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX25.
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config DEBUG_IMX21_IMX27_UART
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bool "i.MX21 and i.MX27 Debug UART"
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depends on SOC_IMX21 || SOC_IMX27
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX21 or i.MX27.
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config DEBUG_IMX28_UART
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bool "i.MX28 Debug UART"
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depends on SOC_IMX28
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX28.
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config DEBUG_IMX31_IMX35_UART
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bool "i.MX31 and i.MX35 Debug UART"
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depends on SOC_IMX31 || SOC_IMX35
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX31 or i.MX35.
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config DEBUG_IMX51_UART
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bool "i.MX51 Debug UART"
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depends on SOC_IMX51
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX51.
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config DEBUG_IMX50_IMX53_UART
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bool "i.MX50 and i.MX53 Debug UART"
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depends on SOC_IMX50 || SOC_IMX53
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX50 or i.MX53.
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config DEBUG_IMX6Q_UART4
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bool "i.MX6Q Debug UART4"
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depends on SOC_IMX6Q
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX6Q UART4.
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config DEBUG_REALVIEW_STD_PORT
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bool "RealView Default UART"
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depends on ARCH_REALVIEW
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help
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Say Y here if you want the debug print routines to direct
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their output to the serial port on RealView EB, PB11MP, PBA8
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and PBX platforms.
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config DEBUG_REALVIEW_PB1176_PORT
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bool "RealView PB1176 UART"
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depends on MACH_REALVIEW_PB1176
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help
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Say Y here if you want the debug print routines to direct
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their output to the standard serial port on the RealView
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PB1176 platform.
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config DEBUG_S3C_UART0
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depends on PLAT_SAMSUNG
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bool "Use S3C UART 0 for low-level debug"
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help
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Say Y here if you want the debug print routines to direct
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their output to UART 0. The port must have been initialised
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by the boot-loader before use.
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The uncompressor code port configuration is now handled
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by CONFIG_S3C_LOWLEVEL_UART_PORT.
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config DEBUG_S3C_UART1
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depends on PLAT_SAMSUNG
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bool "Use S3C UART 1 for low-level debug"
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help
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Say Y here if you want the debug print routines to direct
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their output to UART 1. The port must have been initialised
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by the boot-loader before use.
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The uncompressor code port configuration is now handled
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by CONFIG_S3C_LOWLEVEL_UART_PORT.
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config DEBUG_S3C_UART2
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depends on PLAT_SAMSUNG
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bool "Use S3C UART 2 for low-level debug"
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help
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Say Y here if you want the debug print routines to direct
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their output to UART 2. The port must have been initialised
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by the boot-loader before use.
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The uncompressor code port configuration is now handled
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by CONFIG_S3C_LOWLEVEL_UART_PORT.
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config DEBUG_LL_UART_NONE
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bool "No low-level debugging UART"
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help
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Say Y here if your platform doesn't provide a UART option
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below. This relies on your platform choosing the right UART
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definition internally in order for low-level debugging to
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work.
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config DEBUG_ICEDCC
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bool "Kernel low-level debugging via EmbeddedICE DCC channel"
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help
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Say Y here if you want the debug print routines to direct
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their output to the EmbeddedICE macrocell's DCC channel using
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co-processor 14. This is known to work on the ARM9 style ICE
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channel and on the XScale with the PEEDI.
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Note that the system will appear to hang during boot if there
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is nothing connected to read from the DCC.
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config DEBUG_SEMIHOSTING
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bool "Kernel low-level debug output via semihosting I"
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help
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Semihosting enables code running on an ARM target to use
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the I/O facilities on a host debugger/emulator through a
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simple SVC calls. The host debugger or emulator must have
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semihosting enabled for the special svc call to be trapped
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otherwise the kernel will crash.
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This is known to work with OpenOCD, as wellas
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ARM's Fast Models, or any other controlling environment
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that implements semihosting.
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For more details about semihosting, please see
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chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
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endchoice
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config EARLY_PRINTK
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bool "Early printk"
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depends on DEBUG_LL
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help
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Say Y here if you want to have an early console using the
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kernel low-level debugging functions. Add earlyprintk to your
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kernel parameters to enable this console.
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config OC_ETM
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bool "On-chip ETM and ETB"
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depends on ARM_AMBA
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help
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Enables the on-chip embedded trace macrocell and embedded trace
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buffer driver that will allow you to collect traces of the
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kernel code.
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config ARM_KPROBES_TEST
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tristate "Kprobes test module"
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depends on KPROBES && MODULES
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help
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Perform tests of kprobes API and instruction set simulation.
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comment "Samsung Debugging Feature"
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menuconfig SEC_DEBUG
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bool "Samsung TN Ramdump Feature"
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default n
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help
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Samsung TN Ramdump Feature.
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Enables collection of ram dump.
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Enables task history, debug level etc.
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This feature is enabled in defconfig.
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if SEC_DEBUG
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config SEC_DEBUG_SCHED_LOG
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bool "Samsung Scheduler Logging Feature"
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default n
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help
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Samsung Scheduler Logging Feature for Debug use.
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Enables task scheduling history.
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Enables IRQ scheduling history.
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This feature is enabled in defconfig.
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config SEC_DEBUG_SEMAPHORE_LOG
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bool "Samsung Semaphore Logging Feature"
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default n
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help
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Samsung Semaphore Logging Feature for Debug use.
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Enables semaphore debugging statistics.
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Enables logging.
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This feature is enabled in defconfig.
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config SEC_FILE_LEAK_DEBUG
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bool "Samsung File Leak Debugging Feature"
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default n
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help
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Samsung File Leak Debugging Feature for Debug use.
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Enables the forced panic mode when EMFILE Eror occurs.
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This feature is enabled in defconfig.
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config SEC_LOGGER_BUFFER_EXPANSION
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bool "Samsung Logger Buffer Expansion Feature"
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default n
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help
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This is used to expand buffers of logger.
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This feature is enabled in defconfig.
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config SEC_LOGGER_BUFFER_EXPANSION_SIZE
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int "Samsung Logger Buffer Expansion Size(MB)"
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depends on SEC_LOGGER_BUFFER_EXPANSION
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default 2
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help
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This is used to expand main buffer of logger(MB).
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endif
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config SEC_FORKHANG_DEBUG
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bool "Debug Feature for Newly Forked task getting HANg on mmap_sem down_read()"
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default n
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help
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mmap_sem writer lock logging for ram dump analysis.
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Collects kernel debug log.
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Log is collected in the no-cache area.
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This feature is enabled in defconfig.
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config SEC_DEBUG_USER
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bool "Panic on Userspace fault"
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default y
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help
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Panic on Userspace fault
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This feature enables collection of ram dump,
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on user fault.
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Enabled native code debugging.
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config SEC_DEBUG_IRQ_EXIT_LOG
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bool "Temporary Logging for IRQ delay"
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default n
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help
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Verbose Logging for IRQ delay.
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Helps indetification of irq enter and exit.
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This is to track the current state of IRQ execution.
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This is enabled in defconfig file.
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config SEC_DEBUG_MSG_LOG
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bool "Message Log for ram dump debug"
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default n
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help
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Verbose Logging for ram dump analysis.
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Collects kernel debug log.
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Log is collected in the no-cache area.
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This feature is enabled in defconfig.
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config SEC_DEBUG_SUBSYS
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bool "Debug subsystems"
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default n
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help
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Subsystems debug feature.
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When enabled provides kernel logs, modem logs, RPM registers,
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Schedule and IRQ logs at the time of crash along with the
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reason for crash, which can be extracted as a html in RAM dump mode.
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config SEC_DEBUG_DCVS_LOG
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bool "Temporary Logging for DCVS"
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default n
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help
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DCVS Logging Feature for Debug use.
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The ACPU clock rate changes will be logged as a part
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of secdbg_log structure along with the CPU time stamp.
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The previous frequency and the new frequency for both the CPU along
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with the CPU time stamp will be logged.
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config SEC_DEBUG_FUELGAUGE_LOG
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bool "Temporary Logging for FuelGauge"
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default n
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help
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FuelGauge Logging Feature for Debug use.
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The FuelGauge values are logged as a part
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of secdbg_log structure along with the CPU time stamp.
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The voltage and soc values along with the CPU time will be logged.
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config SEC_DEBUG_LOW_LOG
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bool "Kernel Message Logging for Debug Level Low"
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default n
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help
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Kernel Message Logging Feature for Debug use.
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The Kernel Messages are logged using file I/O
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when an exception occurs, when the debug level is low.
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The file I/O is added in kernel driver level
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so that kernel messages are logged on next reboot.
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config SEC_DEBUG_MDM_FILE_INFO
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bool "MDM filename and line number in UPLOAD mode"
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default n
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help
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This feature enables display of MDM info in upload mode.
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This feature enabled SSR in debug level low.
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Collects MDM ram dump and then calls panic.
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UPLOAD mode has MDM dump info to show it on LCD.
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config SEC_DEBUG_DOUBLE_FREE
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bool "Enable double free detection"
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default n
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help
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Detect erraneous codes that frees a kmalloced node
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twice. When kfree(p) is called, p is not freed right away.
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Instead, it is pushed into a circular buffer. What it frees
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is the oldest pointer that was pushed into the buffer.
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If someone tries to free the same pointer p, *p
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is read and checked for a magic code that is written
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when it was first freed. If it matches, the whole
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circular buffer is searched. Panic is be called when
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the match is found.
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config SEC_LOG_LAST_KMSG
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bool "Enable /proc/last_kmsg support: if EMBEDDED"
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default n
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help
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This option enables /proc/last_kmsg support.
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config SEC_DEBUG_NOCACHE_LOG_IN_LEVEL_LOW
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bool "Enable nocache logging in debug level LOW"
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default n
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help
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Enable nocache logging in debug level LOW.
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config SEC_MONITOR_BATTERY_REMOVAL
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bool "Enable monitering whether normal power sequence or not"
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default n
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help
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Enable monitering Power off & battery removal.
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comment "PowerManagement Feature"
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menuconfig SEC_PM
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bool "Samsung TN PowerManagement Feature"
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default y
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help
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Samsung TN PowerManagement Feature.
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if SEC_PM
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config SEC_PM_DEBUG
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bool "Samsung TN PowerManagement Debug Feature"
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default n
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help
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Samsung TN PowerManagement Debug Feature.
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endif
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config PID_IN_CONTEXTIDR
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bool "Write the current PID to the CONTEXTIDR register"
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depends on CPU_COPY_V6
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help
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Enabling this option causes the kernel to write the current PID to
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the PROCID field of the CONTEXTIDR register, at the expense of some
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additional instructions during context switch. Say Y here only if you
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are planning to use hardware trace tools with this kernel.
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config DEBUG_SET_MODULE_RONX
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bool "Set loadable kernel module data as NX and text as RO"
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depends on MODULES
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---help---
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This option helps catch unintended modifications to loadable
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kernel module's text and read-only data. It also prevents execution
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of module data. Such protection may interfere with run-time code
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patching and dynamic kernel tracing - and they might also protect
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against certain classes of kernel exploits.
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If in doubt, say "N".
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comment "Samsung Rooting Restriction Feature"
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config SEC_RESTRICT_ROOTING
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bool "Samsung Rooting Restriction Feature"
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default n
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help
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Restrict unauthorized executions with root permission.
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config SEC_RESTRICT_SETUID
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bool "Restrict changing root privilege except allowed process"
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depends on SEC_RESTRICT_ROOTING
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default y
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help
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Say Y here if you want to restrict functions related setuid. Only allowed
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process can chanage ROOT privilege. Saying N will not restrict changing
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permission.
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config SEC_RESTRICT_FORK
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bool "Restrict forking process except allowed process"
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depends on SEC_RESTRICT_ROOTING
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default y
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help
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Say Y here if you want to restrict function related fork. Process matched
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special condition will be not forked. Saying N will not restrict forking
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process.
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config SEC_RESTRICT_ROOTING_LOG
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bool "Print restricted result to kernel log"
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depends on SEC_RESTRICT_ROOTING
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default n
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help
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Say Y here if you want to see result of restricting SETUID or FORK. It will
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be displayed by kernel error log. Saying N will not be displayed anything.
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config RESTART_REASON_SEC_PARAM
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bool "Save restart reason in SEC param partition"
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default n
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help
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Param partition can retain the values across reboot, hence this comes in handy backup, when restart reason saved in IMEM is lost.
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config RESTART_REASON_DDR
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bool "Save restart reason in DDR reserved area"
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default n
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help
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This comes in handy backup, when restart reason saved in IMEM is lost.
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comment "BSP Feature"
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menuconfig SEC_BSP
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bool "Samsung TN BSP Feature"
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default n
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help
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Samsung TN BSP Feature.
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endmenu
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config UNUSED_PR_SET_TIMERSLACK_PID
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bool "Unused PR_SET_TIMERSLACK_PID feature"
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default n
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help
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Due to some potential bug of this android kernel feature that suggested by Google, it is disabled not to use in SEC project.
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