projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 1da177e4 | 2 | |
| afbfb52e | 3 | config TRACE_IRQFLAGS_SUPPORT |
| d7ef4fb3 | 4 | def_bool y |
| afbfb52e | 5 | |
| 1da177e4 LT |
6 | config SH_STANDARD_BIOS |
| 7 | bool "Use LinuxSH standard BIOS" | |
| 8 | help | |
| 9 | Say Y here if your target has the gdb-sh-stub | |
| 10 | package from www.m17n.org (or any conforming standard LinuxSH BIOS) | |
| 11 | in FLASH or EPROM. The kernel will use standard BIOS calls during | |
| 12 | boot for various housekeeping tasks (including calls to read and | |
| 13 | write characters to a system console, get a MAC address from an | |
| 14 | on-board Ethernet interface, and shut down the hardware). Note this | |
| 15 | does not work with machines with an existing operating system in | |
| 16 | mask ROM and no flash (WindowsCE machines fall in this category). | |
| 17 | If unsure, say N. | |
| 18 | ||
| 9f14b84a | 19 | config STACK_DEBUG |
| d153ea88 | 20 | bool "Check for stack overflows" |
| 37744fee | 21 | depends on DEBUG_KERNEL |
| d153ea88 PM |
22 | help |
| 23 | This option will cause messages to be printed if free stack space | |
| 9f14b84a PM |
24 | drops below a certain limit. Saying Y here will add overhead to |
| 25 | every function call and will therefore incur a major | |
| 26 | performance hit. Most users should say N. | |
| d153ea88 | 27 | |
| a6a31139 PM |
28 | config 4KSTACKS |
| 29 | bool "Use 4Kb for kernel stacks instead of 8Kb" | |
| b817f7e0 | 30 | depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB |
| a6a31139 PM |
31 | help |
| 32 | If you say Y here the kernel will use a 4Kb stacksize for the | |
| 33 | kernel stack attached to each process/thread. This facilitates | |
| 34 | running more threads on a system and also reduces the pressure | |
| 35 | on the VM subsystem for higher order allocations. This option | |
| 36 | will also use IRQ stacks to compensate for the reduced stackspace. | |
| 37 | ||
| 110ed282 PM |
38 | config IRQSTACKS |
| 39 | bool "Use separate kernel stacks when processing interrupts" | |
| 37744fee | 40 | depends on DEBUG_KERNEL && BROKEN |
| 110ed282 PM |
41 | help |
| 42 | If you say Y here the kernel will use separate kernel stacks | |
| 43 | for handling hard and soft interrupts. This can help avoid | |
| 44 | overflowing the process kernel stacks. | |
| 45 | ||
| 5d2685d0 PM |
46 | config DUMP_CODE |
| 47 | bool "Show disassembly of nearby code in register dumps" | |
| 37744fee | 48 | depends on DEBUG_KERNEL |
| 5d2685d0 PM |
49 | default y if DEBUG_BUGVERBOSE |
| 50 | default n | |
| 51 | help | |
| 52 | This prints out a code trace of the instructions leading up to | |
| 53 | the faulting instruction as a debugging aid. As this does grow | |
| 54 | the kernel in size a bit, most users will want to say N here. | |
| 55 | ||
| 56 | Those looking for more verbose debugging output should say Y. | |
| 57 | ||
| bd353861 MF |
58 | config DWARF_UNWINDER |
| 59 | bool "Enable the DWARF unwinder for stacktraces" | |
| 60 | select FRAME_POINTER | |
| 61 | default n | |
| 62 | help | |
| 63 | Enabling this option will make stacktraces more accurate, at | |
| 64 | the cost of an increase in overall kernel size. | |
| 65 | ||
| 740a3e67 PM |
66 | config SH_NO_BSS_INIT |
| 67 | bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" | |
| 68 | depends on DEBUG_KERNEL | |
| 69 | default n | |
| 70 | help | |
| 71 | If running in painfully slow environments, such as an RTL | |
| 72 | simulation or from remote memory via SHdebug, where the memory | |
| 25985edc | 73 | can already be guaranteed to ber zeroed on boot, say Y. |
| 740a3e67 PM |
74 | |
| 75 | For all other cases, say N. If this option seems perplexing, or | |
| 76 | you aren't sure, say N. | |
| 77 | ||
| 473d1cf4 PM |
78 | config MCOUNT |
| 79 | def_bool y | |
| 473d1cf4 | 80 | depends on STACK_DEBUG || FUNCTION_TRACER |