target: Make TARGET_SERIAL independent of GRUB configuration

[openwrt/staging/jow.git] / config / Config-kernel.in

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 6c5e6a967a52988dfb4b26b4dbfd3ee9f97deaa4..4c43190e40df5e9df12f83857bdb41250e700006 100644 (file)
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -47,6 +47,7 @@ config KERNEL_MIPS_FP_SUPPORT
 
 config KERNEL_ARM_PMU
        bool
 
 config KERNEL_ARM_PMU
        bool

+       default y if TARGET_armsr_armv8

        depends on (arm || aarch64)
 
 config KERNEL_X86_VSYSCALL_EMULATION
        depends on (arm || aarch64)
 
 config KERNEL_X86_VSYSCALL_EMULATION


@@ -184,16 +185,73 @@ config KERNEL_KASAN_VMALLOC
          will have no effect.
 
 if KERNEL_KASAN
          will have no effect.
 
 if KERNEL_KASAN

-       config KERNEL_KASAN_GENERIC
-       def_bool y
+choice
+       prompt "KASAN mode"
+       depends on KERNEL_KASAN
+       default KERNEL_KASAN_GENERIC
+       help
+         KASAN has three modes:
+
+         1. Generic KASAN (supported by many architectures, enabled with
+            CONFIG_KASAN_GENERIC, similar to userspace ASan),
+         2. Software Tag-Based KASAN (arm64 only, based on software memory
+            tagging, enabled with CONFIG_KASAN_SW_TAGS, similar to userspace
+            HWASan), and
+         3. Hardware Tag-Based KASAN (arm64 only, based on hardware memory
+            tagging, enabled with CONFIG_KASAN_HW_TAGS).
+
+config KERNEL_KASAN_GENERIC
+       bool "Generic KASAN"
+       select KERNEL_SLUB_DEBUG
+       help
+         Enables Generic KASAN.
+
+         Consumes about 1/8th of available memory at kernel start and adds an
+         overhead of ~50% for dynamic allocations.
+         The performance slowdown is ~x3.
+
+config KERNEL_KASAN_SW_TAGS
+       bool "Software Tag-Based KASAN"
+       depends on aarch64
+       select KERNEL_SLUB_DEBUG
+       help
+         Enables Software Tag-Based KASAN.
+
+         Supported only on arm64 CPUs and relies on Top Byte Ignore.
+
+         Consumes about 1/16th of available memory at kernel start and
+         add an overhead of ~20% for dynamic allocations.
+
+         May potentially introduce problems related to pointer casting and
+         comparison, as it embeds a tag into the top byte of each pointer.
+
+config KERNEL_KASAN_HW_TAGS
+       bool "Hardware Tag-Based KASAN"
+       depends on aarch64
+       select KERNEL_SLUB_DEBUG
+       select KERNEL_ARM64_MTE
+       help
+         Enables Hardware Tag-Based KASAN.
+
+         Supported only on arm64 CPUs starting from ARMv8.5 and relies on
+         Memory Tagging Extension and Top Byte Ignore.
+
+         Consumes about 1/32nd of available memory.
+
+         May potentially introduce problems related to pointer casting and
+         comparison, as it embeds a tag into the top byte of each pointer.
+
+endchoice
+
+       config KERNEL_ARM64_MTE
+               def_bool n

 
 

-       config KERNEL_KASAN_SW_TAGS
-       def_bool n

 endif
 
 choice
        prompt "Instrumentation type"
        depends on KERNEL_KASAN
 endif
 
 choice
        prompt "Instrumentation type"
        depends on KERNEL_KASAN

+       depends on !KERNEL_KASAN_HW_TAGS

        default KERNEL_KASAN_OUTLINE
 
 config KERNEL_KASAN_OUTLINE
        default KERNEL_KASAN_OUTLINE
 
 config KERNEL_KASAN_OUTLINE


@@ -397,6 +455,17 @@ config KERNEL_DEBUG_INFO_REDUCED
          DEBUG_INFO build and compile times are reduced too.
          Only works with newer gcc versions.
 
          DEBUG_INFO build and compile times are reduced too.
          Only works with newer gcc versions.
 

+config KERNEL_FRAME_WARN
+       int
+       range 0 8192
+       default 1280 if KERNEL_KASAN && !ARCH_64BIT
+       default 1024 if !ARCH_64BIT
+       default 2048 if ARCH_64BIT
+       help
+         Tell the compiler to warn at build time for stack frames larger than this.
+         Setting this too low will cause a lot of warnings.
+         Setting it to 0 disables the warning.
+

 # KERNEL_DEBUG_LL symbols must have the default value set as otherwise
 # KConfig wont evaluate them unless KERNEL_EARLY_PRINTK is selected
 # which means that buildroot wont override the DEBUG_LL symbols in target
 # KERNEL_DEBUG_LL symbols must have the default value set as otherwise
 # KConfig wont evaluate them unless KERNEL_EARLY_PRINTK is selected
 # which means that buildroot wont override the DEBUG_LL symbols in target


@@ -613,10 +682,23 @@ config KERNEL_PRINTK_TIME
        default y
 
 config KERNEL_SLUB_DEBUG
        default y
 
 config KERNEL_SLUB_DEBUG

-       bool
+       bool "Enable SLUB debugging support"
+       help
+         This enables various debugging features:
+           - Accepts "slub_debug" kernel parameter
+           - Provides caches debugging options (e.g. tracing, validating)
+           - Adds /sys/kernel/slab/ attrs for reading amounts of *objects*
+           - Enables /proc/slabinfo support
+           - Prints info when running out of memory
+
+         Enabling this can result in a significant increase of code size.

 
 config KERNEL_SLUB_DEBUG_ON
 
 config KERNEL_SLUB_DEBUG_ON

-       bool
+       depends on KERNEL_SLUB_DEBUG
+       bool "Boot kernel with basic caches debugging enabled"
+       help
+         This enables by default sanity_checks, red_zone, poison and store_user
+         debugging options for all caches.

 
 config KERNEL_SLABINFO
        select KERNEL_SLUB_DEBUG
 
 config KERNEL_SLABINFO
        select KERNEL_SLUB_DEBUG


@@ -1096,6 +1178,12 @@ config KERNEL_NET_L3_MASTER_DEV
          This module provides glue between core networking code and device
          drivers to support L3 master devices like VRF.
 
          This module provides glue between core networking code and device
          drivers to support L3 master devices like VRF.
 

+config KERNEL_XDP_SOCKETS
+       bool "XDP sockets support"
+       help
+         XDP sockets allows a channel between XDP programs and
+         userspace applications.
+

 config KERNEL_WIRELESS_EXT
        def_bool n
 
 config KERNEL_WIRELESS_EXT
        def_bool n
 


@@ -1332,3 +1420,19 @@ config KERNEL_UBIFS_FS_SECURITY
 
 config KERNEL_JFFS2_FS_SECURITY
        bool "JFFS2 Security Labels"
 
 config KERNEL_JFFS2_FS_SECURITY
        bool "JFFS2 Security Labels"

+
+config KERNEL_WERROR
+       bool "Compile the kernel with warnings as errors"
+       default BUILDBOT
+       default y if GCC_USE_VERSION_12
+       help
+         A kernel build should not cause any compiler warnings, and this
+         enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags
+         to enforce that rule by default. Certain warnings from other tools
+         such as the linker may be upgraded to errors with this option as
+         well.
+
+         However, if you have a new (or very old) compiler or linker with odd
+         and unusual warnings, or you have some architecture with problems,
+         you may need to disable this config option in order to
+         successfully build the kernel.