arch/x86/Kconfig.debug

1 # SPDX-License-Identifier: GPL-2.0
11 	  (e.g. bzImage) of the boot. If you disable this you will still
50 	  a full-blown printk console driver + klogd.
70 	bool "Set upper limit of TLB entries to flush one-by-one"
73 	  X86-only for now.
76 	  kernel flushes one-by-one instead of doing a full TLB flush. In
79 	  to -1, the code flushes the whole TLB unconditionally. Otherwise,
94 	  allow to enable IOMMU leak tracing. Can be disabled at boot
100 	  options. See Documentation/arch/x86/x86_64/boot-options.rst for more
128 	bool "port 0x80 based port-IO delay [recommended]"
134 	bool "port 0xed based port-IO delay"
137 	  often used as a hardware-debug port.
140 	bool "udelay based port-IO delay"
142 	  Use udelay(2) as the IO delay method. This provides the delay
143 	  while not having any side-effect on the IO port space.
146 	bool "no port-IO delay"
148 	  No port-IO delay. Will break on old boxes that require port-IO
154 	bool "Debug boot parameters"
161 	bool "CPA self-test code"
164 	  Do change_page_attr() self-tests every 30 seconds.
167 	bool "Debug low-level entry code"
170 	  This option enables sanity checks in x86's low-level entry code.
206 	  checks and (boot time) debug printouts added to the kernel.
229 	  This determines which method will be used for unwinding kernel stack
243 	  frame pointer unwinder.  It also enables a 5-10% performance
247 	  by roughly 2-4MB, depending on your kernel config.
258 	  overall performance will degrade by roughly 5-10%.