arch/x86/Kconfig.debug

1 # SPDX-License-Identifier: GPL-2.0
17 	  (e.g. bzImage) of the boot. If you disable this you will still
56 	  a full-blown printk console driver + klogd.
79 	bool "Set upper limit of TLB entries to flush one-by-one"
83 	X86-only for now.
86 	kernel flushes one-by-one instead of doing a full TLB flush. In
89 	to -1, the code flushes the whole TLB unconditionally. Otherwise,
104 	  allow to enable IOMMU leak tracing. Can be disabled at boot
110 	  options. See Documentation/x86/x86_64/boot-options.rst for more
138 	bool "port 0x80 based port-IO delay [recommended]"
144 	bool "port 0xed based port-IO delay"
147 	  often used as a hardware-debug port.
150 	bool "udelay based port-IO delay"
152 	  Use udelay(2) as the IO delay method. This provides the delay
153 	  while not having any side-effect on the IO port space.
156 	bool "no port-IO delay"
158 	  No port-IO delay. Will break on old boxes that require port-IO
164 	bool "Debug boot parameters"
171 	bool "CPA self-test code"
174 	  Do change_page_attr() self-tests every 30 seconds.
177 	bool "Debug low-level entry code"
180 	  This option enables sanity checks in x86's low-level entry code.
216 	  checks and (boot time) debug printouts added to the kernel.
239 	  This determines which method will be used for unwinding kernel stack
253 	  frame pointer unwinder.  It also enables a 5-10% performance
257 	  by roughly 2-4MB, depending on your kernel config.
268 	  overall performance will degrade by roughly 5-10%.