CONFIG_ARM64_PTR_AUTH_KERNEL: Use pointer authentication for kernel

General informations

The Linux kernel configuration item CONFIG_ARM64_PTR_AUTH_KERNEL:

• prompt: Use pointer authentication for kernel
• type: bool
• depends on: ( CONFIG_ARM64_PTR_AUTH ) && (( CONFIG_CC_HAS_SIGN_RETURN_ADDRESS || CONFIG_CC_HAS_BRANCH_PROT_PAC_RET ) && CONFIG_AS_HAS_ARMV8_3 ) && ( CONFIG_LD_IS_LLD || CONFIG_LD_VERSION >= CONFIG_23301 || ( CONFIG_CC_IS_GCC && CONFIG_GCC_VERSION < CONFIG_90100 )) && (! CONFIG_CC_IS_CLANG || CONFIG_AS_HAS_CFI_NEGATE_RA_STATE ) && ((! CONFIG_FUNCTION_GRAPH_TRACER || CONFIG_DYNAMIC_FTRACE_WITH_ARGS ))
• defined in arch/arm64/Kconfig
• found in Linux kernels: 5.14–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

If the compiler supports the -mbranch-protection or -msign-return-address flag (e.g. GCC 7 or later), then this option will cause the kernel itself to be compiled with return address protection. In this case, and if the target hardware is known to support pointer authentication, then STACKPROTECTOR can be disabled with minimal loss of protection.

This feature works with FUNCTION_GRAPH_TRACER option only if DYNAMIC_FTRACE_WITH_ARGS is enabled.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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