Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
b56f5cbc7e
Currently, the bit sliced NEON AES code for ARM has a link time dependency on the scalar ARM asm implementation, which it uses as a fallback to perform CBC encryption and the encryption of the initial XTS tweak. The bit sliced NEON code is both fast and time invariant, which makes it a reasonable default on hardware that supports it. However, the ARM asm code it pulls in is not time invariant, and due to the way it is linked in, cannot be overridden by the new generic time invariant driver. In fact, it will not be used at all, given that the ARM asm code registers itself as a cipher with a priority that exceeds the priority of the fixed time cipher. So remove the link time dependency, and allocate the fallback cipher via the crypto API. Note that this requires this driver's module_init call to be replaced with late_initcall, so that the (possibly generic) fallback cipher is guaranteed to be available when the builtin test is performed at registration time. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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README
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.