1 choice !! 1 # SPDX-License-Identifier: GPL-2.0
2 prompt "Choose kernel unwinder" <<
3 default UNWINDER_PROLOGUE if KALLSYMS <<
4 help <<
5 This determines which method will be <<
6 traces for panics, oopses, bugs, war <<
7 lockdep, and more. <<
8 <<
9 config UNWINDER_GUESS <<
10 bool "Guess unwinder" <<
11 help <<
12 This option enables the "guess" unwi <<
13 traces. It scans the stack and repo <<
14 finds. Some of the addresses it rep <<
15 <<
16 While this option often produces fal <<
17 useful in many cases. <<
18 <<
19 config UNWINDER_PROLOGUE <<
20 bool "Prologue unwinder" <<
21 depends on KALLSYMS <<
22 help <<
23 This option enables the "prologue" u <<
24 traces. It unwind the stack frame b <<
25 information is needed, at least the <<
26 Some of the addresses it reports may <<
27 Guess unwinder). <<
28 <<
29 config UNWINDER_ORC <<
30 bool "ORC unwinder" <<
31 depends on HAVE_OBJTOOL <<
32 select OBJTOOL <<
33 help <<
34 This option enables the ORC (Oops Re <<
35 unwinding kernel stack traces. It u <<
36 a simplified version of the DWARF Ca <<
37 2
38 Enabling this option will increase t !! 3 config TRACE_IRQFLAGS_SUPPORT
39 by roughly 2-4MB, depending on your !! 4 bool
>> 5 default y
>> 6
>> 7 config EARLY_PRINTK
>> 8 bool "Early printk" if EXPERT
>> 9 depends on SYS_HAS_EARLY_PRINTK
>> 10 default y
>> 11 help
>> 12 This option enables special console drivers which allow the kernel
>> 13 to print messages very early in the bootup process.
>> 14
>> 15 This is useful for kernel debugging when your machine crashes very
>> 16 early before the console code is initialized. For normal operation,
>> 17 it is not recommended because it looks ugly on some machines and
>> 18 doesn't cooperate with an X server. You should normally say N here,
>> 19 unless you want to debug such a crash.
>> 20
>> 21 config EARLY_PRINTK_8250
>> 22 bool
>> 23 depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
>> 24 default y
>> 25 help
>> 26 "8250/16550 and compatible serial early printk driver"
>> 27 If you say Y here, it will be possible to use a 8250/16550 serial
>> 28 port as the boot console.
>> 29
>> 30 config USE_GENERIC_EARLY_PRINTK_8250
>> 31 bool
>> 32
>> 33 config CMDLINE_BOOL
>> 34 bool "Built-in kernel command line"
>> 35 default n
>> 36 help
>> 37 For most systems, it is firmware or second stage bootloader that
>> 38 by default specifies the kernel command line options. However,
>> 39 it might be necessary or advantageous to either override the
>> 40 default kernel command line or add a few extra options to it.
>> 41 For such cases, this option allows you to hardcode your own
>> 42 command line options directly into the kernel. For that, you
>> 43 should choose 'Y' here, and fill in the extra boot arguments
>> 44 in CONFIG_CMDLINE.
>> 45
>> 46 The built-in options will be concatenated to the default command
>> 47 line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
>> 48 command line will be ignored and replaced by the built-in string.
>> 49
>> 50 Most MIPS systems will normally expect 'N' here and rely upon
>> 51 the command line from the firmware or the second-stage bootloader.
>> 52
>> 53 config CMDLINE
>> 54 string "Default kernel command string"
>> 55 depends on CMDLINE_BOOL
>> 56 default ""
>> 57 help
>> 58 On some platforms, there is currently no way for the boot loader to
>> 59 pass arguments to the kernel. For these platforms, and for the cases
>> 60 when you want to add some extra options to the command line or ignore
>> 61 the default command line, you can supply some command-line options at
>> 62 build time by entering them here. In other cases you can specify
>> 63 kernel args so that you don't have to set them up in board prom
>> 64 initialization routines.
>> 65
>> 66 For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
>> 67 options.
>> 68
>> 69 config CMDLINE_OVERRIDE
>> 70 bool "Built-in command line overrides firmware arguments"
>> 71 default n
>> 72 depends on CMDLINE_BOOL
>> 73 help
>> 74 By setting this option to 'Y' you will have your kernel ignore
>> 75 command line arguments from firmware or second stage bootloader.
>> 76 Instead, the built-in command line will be used exclusively.
>> 77
>> 78 Normally, you will choose 'N' here.
>> 79
>> 80 config SB1XXX_CORELIS
>> 81 bool "Corelis Debugger"
>> 82 depends on SIBYTE_SB1xxx_SOC
>> 83 select DEBUG_INFO if !COMPILE_TEST
>> 84 help
>> 85 Select compile flags that produce code that can be processed by the
>> 86 Corelis mksym utility and UDB Emulator.
>> 87
>> 88 config DEBUG_ZBOOT
>> 89 bool "Enable compressed kernel support debugging"
>> 90 depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
>> 91 default n
>> 92 help
>> 93 If you want to add compressed kernel support to a new board, and the
>> 94 board supports uart16550 compatible serial port, please select
>> 95 SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
>> 96 debug it.
>> 97
>> 98 If your board doesn't support uart16550 compatible serial port, you
>> 99 can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
>> 100 debug it. for example, add a new serial port support just as
>> 101 arch/mips/boot/compressed/uart-16550.c does.
>> 102
>> 103 After the compressed kernel support works, please disable this option
>> 104 to reduce the kernel image size and speed up the booting procedure a
>> 105 little.
>> 106
>> 107 config SPINLOCK_TEST
>> 108 bool "Enable spinlock timing tests in debugfs"
>> 109 depends on DEBUG_FS
>> 110 default n
>> 111 help
>> 112 Add several files to the debugfs to test spinlock speed.
>> 113
>> 114 config SCACHE_DEBUGFS
>> 115 bool "L2 cache debugfs entries"
>> 116 depends on DEBUG_FS
>> 117 help
>> 118 Enable this to allow parts of the L2 cache configuration, such as
>> 119 whether or not prefetching is enabled, to be exposed to userland
>> 120 via debugfs.
>> 121
>> 122 If unsure, say N.
>> 123
>> 124 menuconfig MIPS_CPS_NS16550_BOOL
>> 125 bool "CPS SMP NS16550 UART output"
>> 126 depends on MIPS_CPS
>> 127 help
>> 128 Output debug information via an ns16550 compatible UART if exceptions
>> 129 occur early in the boot process of a secondary core.
>> 130
>> 131 if MIPS_CPS_NS16550_BOOL
>> 132
>> 133 config MIPS_CPS_NS16550
>> 134 def_bool MIPS_CPS_NS16550_BASE != 0
>> 135
>> 136 config MIPS_CPS_NS16550_BASE
>> 137 hex "UART Base Address"
>> 138 default 0x1b0003f8 if MIPS_MALTA
>> 139 default 0
>> 140 help
>> 141 The base address of the ns16550 compatible UART on which to output
>> 142 debug information from the early stages of core startup.
>> 143
>> 144 This is only used if non-zero.
>> 145
>> 146 config MIPS_CPS_NS16550_SHIFT
>> 147 int "UART Register Shift"
>> 148 default 0
>> 149 help
>> 150 The number of bits to shift ns16550 register indices by in order to
>> 151 form their addresses. That is, log base 2 of the span between
>> 152 adjacent ns16550 registers in the system.
40 153
41 endchoice !! 154 endif # MIPS_CPS_NS16550_BOOL
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