mirror of
https://github.com/anrieff/libcpuid
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27 lines
1.1 KiB
Markdown
27 lines
1.1 KiB
Markdown
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# CPUID Linux kernel module for ARM
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This kernel module allows to:
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- access AArch32 registers in AArch32 state by using the [`MRC` instruction](https://developer.arm.com/documentation/dui0489/i/arm-and-thumb-instructions/mrc-and-mrc2)
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- access both AArch32 and AArch64 registers in AArch64 state by using the [`MRS` instruction](https://developer.arm.com/documentation/dui0473/m/arm-and-thumb-instructions/mrs--system-coprocessor-register-to-arm-register-)
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## Build
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### Without DKMS
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Building the kernel module by using CMake is useful for libcpuid developers. This method is discouraged for end-users, because you will need to rebuild this module on every kernel updates.
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To build the kernel module in the build directory, use CMake with the `-DLIBCPUID_DRIVER_ARM_LINUX_DKMS=OFF` option.
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Then, you can load the module by using:
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```shell
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# insmod build/drivers/arm/linux/cpuid.ko
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```
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### With DKMS
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Once the project is installed (`cmake --install build`), DKMS files will be present under `/usr/src`.
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Use the `dkms` command to build the module, and replace `X.Y.Z` with libcpuid version:
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```shell
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# dkms install -m cpuid -v X.Y.Z
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# modprobe cpuid
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```
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