This series is mostly a repost of patches that I have proposed (and that have been discussed) on the list previously. This time, I am resending it as a coherent series to try and make a stronger case for the features I am proposing.
Patch #8 implements the core AES cipher. It relies on patches 2, 3 and 5 to support udev autoloading of the module if the AES extension is supported by the CPU it is running on. Patches 6 and 7 are required because the core AES cipher may be called from interrupt context. Patch #1 is included as a bonus/reference *only*. It is not intended to be merged, but it allows those who would like to try this code to do so on a system or emulator that does not have the Crypto Extensions implemented. Patch #2 moves arch_cpu_uevent() from x86 to generic code, as it is generic in nature and can be reused by other archs. Patch #3 introduces a generic 'cpu' modalias type which can be used to autoload modules based on whether the CPU supports a certain optional feature. How IDs map to features is not specified, this is up to the arch. Patch #4 changes the x86 specific 'x86cpu' modalias so it adheres to the syntax introduced in patch #3. This is not strictly necessary, but it was suggested in a discussion between H. Peter Anvin, Andi Kleen and myself, i.e., that a generic solution should also cover the x86 use case (which has 320 feature bits already) [http://marc.info/?l=linux-kernel&m=138384467604799&w=2] @Peter, Andi: could I please have your ack(s) on patch #2, and possibly on patch #4 if you still feel that all archs should use the same modalias syntax (and you are happy with the way I implemented that) Patch #5 enables the generic 'cpu' feature matching introduced in patch 3 for arm64. Patch #6 is an optimization to the arm64 kernel mode NEON code that tries to avoid pointless saves/restores of the NEON register file. Patch #7 adds support to the kernel mode NEON code for being called from interrupt context. It also adds support for partial saves/restores. Patch #8 implements the AES core cipher. The series depends on 4bff28ccda2b ("arm64: Add hwcaps for crypto and CRC32 extensions.") which is already in Catalin's tree and in linux-next. Ard Biesheuvel (8): arm64: add kernel emulation for AES instructions x86: move arch_cpu_uevent() to generic code cpu: advertise CPU features over udev in a generic way x86: align with generic cpu modalias arm64: advertise CPU features for modalias matching arm64: defer reloading a task's FPSIMD state to userland resume arm64: add support for kernel mode NEON in atomic context arm64: add Crypto Extensions based synchronous core AES cipher arch/arm64/Kconfig | 3 + arch/arm64/Makefile | 2 + arch/arm64/crypto/Makefile | 13 ++ arch/arm64/crypto/aes-ce-cipher.c | 112 ++++++++++++ arch/arm64/emu/Makefile | 11 ++ arch/arm64/emu/ce-aes.c | 331 ++++++++++++++++++++++++++++++++++ arch/arm64/include/asm/fpsimd.h | 20 ++ arch/arm64/include/asm/fpsimdmacros.h | 37 ++++ arch/arm64/include/asm/neon.h | 6 +- arch/arm64/include/asm/thread_info.h | 4 +- arch/arm64/include/asm/traps.h | 10 + arch/arm64/kernel/entry-fpsimd.S | 24 +++ arch/arm64/kernel/entry.S | 6 +- arch/arm64/kernel/fpsimd.c | 108 +++++++++-- arch/arm64/kernel/process.c | 3 +- arch/arm64/kernel/setup.c | 20 ++ arch/arm64/kernel/signal.c | 3 + arch/arm64/kernel/traps.c | 49 +++++ arch/x86/kernel/cpu/match.c | 14 +- crypto/Kconfig | 6 + drivers/base/cpu.c | 15 +- include/linux/cpu.h | 1 - include/linux/mod_devicetable.h | 15 ++ scripts/mod/devicetable-offsets.c | 3 + scripts/mod/file2alias.c | 20 +- 25 files changed, 793 insertions(+), 43 deletions(-) create mode 100644 arch/arm64/crypto/Makefile create mode 100644 arch/arm64/crypto/aes-ce-cipher.c create mode 100644 arch/arm64/emu/Makefile create mode 100644 arch/arm64/emu/ce-aes.c -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
