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[ Upstream commit 25086263425641c74123f9387426c23072b299ea ] The AArch32 CPSR/SPSR format is *almost* identical to the AArch64 SPSR_ELx format for exceptions taken from AArch32, but the two have diverged with the addition of DIT, and we need to treat the two as logically distinct. This patch adds new definitions for the SPSR_ELx format for exceptions taken from AArch32, with a consistent PSR_AA32_ prefix. The existing COMPAT_PSR_ definitions will be used for the PSR format as seen from AArch32. Definitions of DIT are provided for both, and inline functions are provided to map between the two formats. Note that for SPSR_ELx, the (RES0) J bit has been re-allocated as the DIT bit. Once users of the COMPAT_PSR definitions have been migrated over to the PSR_AA32 definitions, the (majority of) the former will be removed, so no efforts is made to avoid duplication until then. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoffer Dall <christoffer.dall@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Suzuki Poulose <suzuki.poulose@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.