This series adds support for booting the 32-bit ARM kernel directly from UEFI firmware using a builtin UEFI stub. It mostly reuses refactored arm64 code, and the differences (primarily the PE/COFF header and entry point and the efi_create_mapping() implementation) are split out into arm64 and ARM versions. Patch #1 splits off most of arch/arm64/kernel/efi.c into arch agnostic files arm-init.c and arm-runtime.c under drivers/firmware/efi. Patch #2 refactors the code split off in patch #1 to isolate the arm64 specific pieces, and change a couple of arm64-isms that ARM handles slightly differently. Patch #3 enables the generic early_ioremap and early_memremap implementations for ARM. It reuses the kmap fixmap region, which is not used that early anyway. Patch #4 adds support to ARM for the MEMBLOCK_NOMAP region flag. Patch #5 splits off the core functionality of create_mapping() into a new function __create_mapping() that we can reuse for mapping UEFI runtime regions. Patch #6 factors out the early_alloc() routine so we can invoke __create_mapping using another (late) allocator. Patch #7 implements create_mapping_late() that uses a late allocator. Patch #8 implements the UEFI support in the kernel proper to probe the UEFI memory map and map the runtime services. Patch #9 ties together all of the above, by implementing the UEFI stub, and introducing the Kconfig symbols that allow all of this to be built. There are a number of prerequisites for this series that have all been sent to the linux-arm-kernel mailing list at some point (and mostly ignored). Matt Fleming's efi-next branch: https://git.kernel.org/cgit/linux/kernel/git/mfleming/efi.git/log/?h=next arm64: EFI stub isolation: http://thread.gmane.org/gmane.linux.kernel.efi/6414 arm64: remove UEFI reserved regions from linear mapping (aka MEMBLOCK_NOMAP) http://thread.gmane.org/gmane.linux.kernel.mm/138474 arm64 UEFI early FDT handling http://thread.gmane.org/gmane.linux.kernel.efi/6334 arm64/efi: adapt to UEFI 2.5 properties table changes http://thread.gmane.org/gmane.linux.kernel.efi/5847 The complete series (including all prerequisites) can be found here: https://git.linaro.org/people/ard.biesheuvel/linux-arm.git/shortlog/refs/heads/arm32-uefi-support Instructions how to build and run the 32-bit ARM UEFI firmware can be found here: https://wiki.linaro.org/LEG/UEFIforQEMU Ard Biesheuvel (8): arm64/efi: split off EFI init and runtime code for reuse by 32-bit ARM arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM ARM: add support for generic early_ioremap/early_memremap ARM: only consider memblocks with NOMAP cleared for linear mapping ARM: split off core mapping logic from create_mapping ARM: factor out allocation routine from __create_mapping() ARM: implement create_mapping_late() for EFI use ARM: wire up UEFI init and runtime support Roy Franz (1): ARM: add UEFI stub support arch/arm/Kconfig | 20 + arch/arm/boot/compressed/Makefile | 5 +- arch/arm/boot/compressed/efi-header.S | 130 +++++++ arch/arm/boot/compressed/efi-stub.c | 89 +++++ arch/arm/boot/compressed/head.S | 54 ++- arch/arm/boot/compressed/vmlinux.lds.S | 7 + arch/arm/include/asm/Kbuild | 1 + arch/arm/include/asm/efi.h | 92 +++++ arch/arm/include/asm/fixmap.h | 28 +- arch/arm/include/asm/mach/map.h | 1 + arch/arm/kernel/Makefile | 1 + arch/arm/kernel/devtree.c | 4 + arch/arm/kernel/efi.c | 71 ++++ arch/arm/kernel/setup.c | 10 +- arch/arm/mm/init.c | 16 +- arch/arm/mm/ioremap.c | 9 + arch/arm/mm/mmu.c | 110 ++++-- arch/arm64/include/asm/efi.h | 16 + arch/arm64/kernel/efi.c | 392 ++------------------ drivers/firmware/efi/Makefile | 4 +- drivers/firmware/efi/arm-init.c | 215 +++++++++++ drivers/firmware/efi/arm-runtime.c | 148 ++++++++ drivers/firmware/efi/efi.c | 4 +- drivers/firmware/efi/libstub/Makefile | 12 + drivers/firmware/efi/libstub/arm-stub.c | 4 +- 25 files changed, 1046 insertions(+), 397 deletions(-) create mode 100644 arch/arm/boot/compressed/efi-header.S create mode 100644 arch/arm/boot/compressed/efi-stub.c create mode 100644 arch/arm/include/asm/efi.h create mode 100644 arch/arm/kernel/efi.c create mode 100644 drivers/firmware/efi/arm-init.c create mode 100644 drivers/firmware/efi/arm-runtime.c -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
