Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990# SPDX-License-Identifier: GPL-2.0
config SH_STANDARD_BIOS bool "Use LinuxSH standard BIOS" help Say Y here if your target has the gdb-sh-stub package from www.m17n.org (or any conforming standard LinuxSH BIOS) in FLASH or EPROM. The kernel will use standard BIOS calls during boot for various housekeeping tasks (including calls to read and write characters to a system console, get a MAC address from an on-board Ethernet interface, and shut down the hardware). Note this does not work with machines with an existing operating system in mask ROM and no flash (WindowsCE machines fall in this category). If unsure, say N.
config STACK_DEBUG bool "Check for stack overflows" depends on DEBUG_KERNEL && PRINTK help This option will cause messages to be printed if free stack space drops below a certain limit. Saying Y here will add overhead to every function call and will therefore incur a major performance hit. Most users should say N.
config EARLY_PRINTK bool "Early printk" depends on SH_STANDARD_BIOS help Say Y here to redirect kernel printk messages to the serial port used by the SH-IPL bootloader, starting very early in the boot process and ending when the kernel's serial console is initialised. This option is only useful while porting the kernel to a new machine, when the kernel may crash or hang before the serial console is initialised. If unsure, say N.
config 4KSTACKS bool "Use 4Kb for kernel stacks instead of 8Kb" depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB help If you say Y here the kernel will use a 4Kb stacksize for the kernel stack attached to each process/thread. This facilitates running more threads on a system and also reduces the pressure on the VM subsystem for higher order allocations. This option will also use IRQ stacks to compensate for the reduced stackspace.
config IRQSTACKS bool "Use separate kernel stacks when processing interrupts" depends on DEBUG_KERNEL && BROKEN help If you say Y here the kernel will use separate kernel stacks for handling hard and soft interrupts. This can help avoid overflowing the process kernel stacks.
config DUMP_CODE bool "Show disassembly of nearby code in register dumps" depends on DEBUG_KERNEL default y if DEBUG_BUGVERBOSE default n help This prints out a code trace of the instructions leading up to the faulting instruction as a debugging aid. As this does grow the kernel in size a bit, most users will want to say N here.
Those looking for more verbose debugging output should say Y.
config DWARF_UNWINDER bool "Enable the DWARF unwinder for stacktraces" depends on DEBUG_KERNEL select FRAME_POINTER default n help Enabling this option will make stacktraces more accurate, at the cost of an increase in overall kernel size.
config SH_NO_BSS_INIT bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" depends on DEBUG_KERNEL default n help If running in painfully slow environments, such as an RTL simulation or from remote memory via SHdebug, where the memory can already be guaranteed to ber zeroed on boot, say Y.
For all other cases, say N. If this option seems perplexing, or you aren't sure, say N.
config MCOUNT def_bool y depends on STACK_DEBUG || FUNCTION_TRACER