119 lines
3.8 KiB
Plaintext
119 lines
3.8 KiB
Plaintext
# Copyright (c) 2023 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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menuconfig LLEXT
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bool "Linkable loadable extensions"
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select CACHE_MANAGEMENT if DCACHE
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select KERNEL_WHOLE_ARCHIVE
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help
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Enable the linkable loadable extension subsystem
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if LLEXT
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choice LLEXT_BINARY_TYPE
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prompt "Binary object type for llext"
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default LLEXT_TYPE_ELF_OBJECT if ARM || ARM64
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default LLEXT_TYPE_ELF_SHAREDLIB if XTENSA
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default LLEXT_TYPE_ELF_RELOCATABLE if RISCV
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help
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Object type for llext
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config LLEXT_TYPE_ELF_OBJECT
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bool "Single object ELF file"
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depends on !RISCV
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help
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Build and expect object files as binary object type for the
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llext subsystem. A single compiler invocation is used to
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generate the object file. Currently not supported on RISC-V.
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config LLEXT_TYPE_ELF_RELOCATABLE
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bool "Relocatable ELF file"
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help
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Build and expect relocatable (partially linked) files as the
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binary object type for the llext subsystem. These object files
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are generated by the linker by combining multiple object files
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into a single one.
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config LLEXT_TYPE_ELF_SHAREDLIB
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bool "Shared library ELF file"
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help
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Build and expect shared libraries as binary object type for
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the llext subsystem. The usual linking process is used to
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generate the shared library from multiple object files.
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endchoice
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config LLEXT_HEAP_SIZE
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int "llext heap memory size in kilobytes"
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default 8
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help
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Heap size in kilobytes available to llext for dynamic allocation
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config LLEXT_SHELL
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bool "llext shell commands"
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depends on SHELL
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help
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Manage llext with shell commands for loading, unloading, and introspection
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config LLEXT_SHELL_MAX_SIZE
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int "Maximum size of llext in bytes"
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depends on LLEXT_SHELL
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default 8192
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help
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When loading llext with shell it is stored in a temporary buffer of this size
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config LLEXT_STORAGE_WRITABLE
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bool "llext storage is writable"
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default y if XTENSA
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help
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Select if LLEXT storage is writable, i.e. if extensions are stored in
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RAM and can be modified in place
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config LLEXT_EXPORT_DEVICES
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bool "Export all DT devices to llexts"
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help
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When enabled, all Zephyr devices defined in the device tree are
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made available to llexts via the standard DT_ / DEVICE_* macros.
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config LLEXT_EXPORT_BUILTINS_BY_SLID
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bool "Export built-in symbols to llexts via SLIDs"
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help
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When enabled, symbols exported from the Zephyr kernel
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or application (via EXPORT_SYMBOL) are linked to LLEXTs
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via Symbol Link Identifiers (SLIDs) instead of name.
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Enabling this option provides a huge size reduction,
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makes the linking process faster and provides more
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confidentiality, as exported symbol names are dropped
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from the binary. However, it can make LLEXT debugging
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harder and prevents usage of 'llext_find_sym' to look
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up symbols from the built-in table by name. It also
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requires the LLEXTs to be post-processed after build.
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module = LLEXT
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module-str = llext
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source "subsys/logging/Kconfig.template.log_config"
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endif
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menu "Linkable loadable Extension Development Kit (EDK)"
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config LLEXT_EDK_NAME
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string "Name for llext EDK (Extension Development Kit)"
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default "llext-edk"
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help
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Name will be used when generating the EDK file, as <name>.tar.xz.
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It will also be used, normalized, as the prefix for the variable
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stating EDK location, used on generated Makefile.cflags. For
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instance, the default name, "llext-edk", becomes LLEXT_EDK_INSTALL_DIR.
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config LLEXT_EDK_USERSPACE_ONLY
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bool "Only generate the Userpace codepath on syscall stubs for the EDK"
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help
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Syscall stubs can contain code that verifies if running code is at user
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or kernel space and route the call accordingly. If the EDK is expected
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to be used by userspace only extensions, this option will make EDK stubs
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not contain the routing code, and only generate the userspace one.
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endmenu
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