menu "Kernel hacking"
  
  source "lib/Kconfig.debug"
  
  config ARM64_PTDUMP_CORE
  	def_bool n
  
  config ARM64_PTDUMP_DEBUGFS
  	bool "Export kernel pagetable layout to userspace via debugfs"
  	depends on DEBUG_KERNEL
  	select ARM64_PTDUMP_CORE
  	select DEBUG_FS
          help
  	  Say Y here if you want to show the kernel pagetable layout in a
  	  debugfs file. This information is only useful for kernel developers
  	  who are working in architecture specific areas of the kernel.
  	  It is probably not a good idea to enable this feature in a production
  	  kernel.
  
  	  If in doubt, say N.
  
  config PID_IN_CONTEXTIDR
  	bool "Write the current PID to the CONTEXTIDR register"
  	help
  	  Enabling this option causes the kernel to write the current PID to
  	  the CONTEXTIDR register, at the expense of some additional
  	  instructions during context switch. Say Y here only if you are
  	  planning to use hardware trace tools with this kernel.
  
  config ARM64_RANDOMIZE_TEXT_OFFSET
  	bool "Randomize TEXT_OFFSET at build time"
  	help
  	  Say Y here if you want the image load offset (AKA TEXT_OFFSET)
  	  of the kernel to be randomized at build-time. When selected,
  	  this option will cause TEXT_OFFSET to be randomized upon any
  	  build of the kernel, and the offset will be reflected in the
  	  text_offset field of the resulting Image. This can be used to
  	  fuzz-test bootloaders which respect text_offset.
  
  	  This option is intended for bootloader and/or kernel testing
  	  only. Bootloaders must make no assumptions regarding the value
  	  of TEXT_OFFSET and platforms must not require a specific
  	  value.
  
  config DEBUG_WX
  	bool "Warn on W+X mappings at boot"
  	select ARM64_PTDUMP_CORE
  	---help---
  	  Generate a warning if any W+X mappings are found at boot.
  
  	  This is useful for discovering cases where the kernel is leaving
  	  W+X mappings after applying NX, as such mappings are a security risk.
  	  This check also includes UXN, which should be set on all kernel
  	  mappings.
  
  	  Look for a message in dmesg output like this:
  
  	    arm64/mm: Checked W+X mappings: passed, no W+X pages found.
  
  	  or like this, if the check failed:
  
  	    arm64/mm: Checked W+X mappings: FAILED, <N> W+X pages found.
  
  	  Note that even if the check fails, your kernel is possibly
  	  still fine, as W+X mappings are not a security hole in
  	  themselves, what they do is that they make the exploitation
  	  of other unfixed kernel bugs easier.
  
  	  There is no runtime or memory usage effect of this option
  	  once the kernel has booted up - it's a one time check.
  
  	  If in doubt, say "Y".
  
  config DEBUG_ALIGN_RODATA
  	depends on STRICT_KERNEL_RWX
  	bool "Align linker sections up to SECTION_SIZE"
  	help
  	  If this option is enabled, sections that may potentially be marked as
  	  read only or non-executable will be aligned up to the section size of
  	  the kernel. This prevents sections from being split into pages and
  	  avoids a potential TLB penalty. The downside is an increase in
  	  alignment and potentially wasted space. Turn on this option if
  	  performance is more important than memory pressure.
  
  	  If in doubt, say N.
  
  config DEBUG_EFI
  	depends on EFI && DEBUG_INFO
  	bool "UEFI debugging"
  	help
  	  Enable this option to include EFI specific debugging features into
  	  the kernel that are only useful when using a debug build of the
  	  UEFI firmware
  
  config ARM64_RELOC_TEST
  	depends on m
  	tristate "Relocation testing module"
  
  source "drivers/hwtracing/coresight/Kconfig"
  
  endmenu