xref: /openbmc/linux/arch/arm64/Kconfig.debug (revision 1c8018f7)
1menu "Kernel hacking"
2
3source "lib/Kconfig.debug"
4
5config ARM64_PTDUMP
6	bool "Export kernel pagetable layout to userspace via debugfs"
7	depends on DEBUG_KERNEL
8	select DEBUG_FS
9        help
10	  Say Y here if you want to show the kernel pagetable layout in a
11	  debugfs file. This information is only useful for kernel developers
12	  who are working in architecture specific areas of the kernel.
13	  It is probably not a good idea to enable this feature in a production
14	  kernel.
15
16	  If in doubt, say N.
17
18config PID_IN_CONTEXTIDR
19	bool "Write the current PID to the CONTEXTIDR register"
20	help
21	  Enabling this option causes the kernel to write the current PID to
22	  the CONTEXTIDR register, at the expense of some additional
23	  instructions during context switch. Say Y here only if you are
24	  planning to use hardware trace tools with this kernel.
25
26config ARM64_RANDOMIZE_TEXT_OFFSET
27	bool "Randomize TEXT_OFFSET at build time"
28	help
29	  Say Y here if you want the image load offset (AKA TEXT_OFFSET)
30	  of the kernel to be randomized at build-time. When selected,
31	  this option will cause TEXT_OFFSET to be randomized upon any
32	  build of the kernel, and the offset will be reflected in the
33	  text_offset field of the resulting Image. This can be used to
34	  fuzz-test bootloaders which respect text_offset.
35
36	  This option is intended for bootloader and/or kernel testing
37	  only. Bootloaders must make no assumptions regarding the value
38	  of TEXT_OFFSET and platforms must not require a specific
39	  value.
40
41config DEBUG_SET_MODULE_RONX
42	bool "Set loadable kernel module data as NX and text as RO"
43	depends on MODULES
44	default y
45	help
46	  Is this is set, kernel module text and rodata will be made read-only.
47	  This is to help catch accidental or malicious attempts to change the
48	  kernel's executable code.
49
50	  If in doubt, say Y.
51
52config DEBUG_ALIGN_RODATA
53	depends on DEBUG_RODATA
54	bool "Align linker sections up to SECTION_SIZE"
55	help
56	  If this option is enabled, sections that may potentially be marked as
57	  read only or non-executable will be aligned up to the section size of
58	  the kernel. This prevents sections from being split into pages and
59	  avoids a potential TLB penalty. The downside is an increase in
60	  alignment and potentially wasted space. Turn on this option if
61	  performance is more important than memory pressure.
62
63	  If in doubt, say N.
64
65source "drivers/hwtracing/coresight/Kconfig"
66
67endmenu
68