Hi Ard, On 16 November 2015 at 18:32, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote: > 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. > > Changes since v1: > - The primary difference between this version and the first one is that all > prerequisites have either been merged, dropped for now (early FDT handling) > or folded into this series (MEMBLOCK_NOMAP). IOW, this series can be applied > on top of v4.4-rc1 directly. > - Dropped handling of UEFI permission bits. The reason is that the UEFIv2.5 > approach (EFI_PROPERTIES_TABLE) is flawed, and will be replaced by something > better in the next version of the spec. > > Patch #1 adds support for the MEMBLOCK_NOMAP attribute to the generic memblock > code. Its purpose is to annotate memory regions as normal memory even if they > are removed from the kernel direct mapping. > > Patch #2 implements MEMBLOCK_NOMAP support for arm64 > > Patch #3 updates the EFI init code to remove UEFI reserved regions and regions > used by runtime services from the kernel direct mapping > > Patch #4 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 #5 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 #6 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 #7 splits off the core functionality of create_mapping() into a new > function __create_mapping() that we can reuse for mapping UEFI runtime regions. > > Patch #8 factors out the early_alloc() routine so we can invoke __create_mapping > using another (late) allocator. > > Patch #9 implements create_mapping_late() that uses a late allocator. > > Patch #10 implements MEMBLOCK_NOMAP support for ARM > > Patch #11 implements the UEFI support in the kernel proper to probe the UEFI > memory map and map the runtime services. > > Patch #12 ties together all of the above, by implementing the UEFI stub, and > introducing the Kconfig symbols that allow all of this to be built. > > Instructions how to build and run the 32-bit ARM UEFI firmware can be found here: > https://wiki.linaro.org/LEG/UEFIforQEMU > > Ard Biesheuvel (11): > mm/memblock: add MEMBLOCK_NOMAP attribute to memblock memory table > arm64: only consider memblocks with NOMAP cleared for linear mapping > arm64/efi: mark UEFI reserved regions as MEMBLOCK_NOMAP > 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: 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: only consider memblocks with NOMAP cleared for linear mapping > 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 | 4 +- > arch/arm/boot/compressed/efi-header.S | 130 ++++++++ > 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 | 90 ++++++ > arch/arm/include/asm/fixmap.h | 29 +- > arch/arm/include/asm/mach/map.h | 1 + > arch/arm/kernel/Makefile | 1 + > arch/arm/kernel/efi.c | 38 +++ > arch/arm/kernel/setup.c | 10 +- > arch/arm/mm/init.c | 5 +- > arch/arm/mm/ioremap.c | 9 + > arch/arm/mm/mmu.c | 110 ++++--- > arch/arm64/include/asm/efi.h | 16 + > arch/arm64/kernel/efi.c | 331 ++------------------ > arch/arm64/mm/init.c | 2 +- > arch/arm64/mm/mmu.c | 2 + > drivers/firmware/efi/Makefile | 4 + > drivers/firmware/efi/arm-init.c | 197 ++++++++++++ > drivers/firmware/efi/arm-runtime.c | 134 ++++++++ > drivers/firmware/efi/efi.c | 2 + > drivers/firmware/efi/libstub/Makefile | 9 + > drivers/firmware/efi/libstub/arm-stub.c | 4 +- > drivers/firmware/efi/libstub/arm32-stub.c | 85 +++++ > include/linux/memblock.h | 8 + > mm/memblock.c | 28 ++ > 28 files changed, 975 insertions(+), 356 deletions(-) > create mode 100644 arch/arm/boot/compressed/efi-header.S > 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 > create mode 100644 drivers/firmware/efi/libstub/arm32-stub.c > > -- > 1.9.1 > I've tested this series against 4.4-rc1 on Versatile Express TC2, booting both as a "regular" kernel and as a EFI Stub on BusyBox and OpenEmbedded. So if it helps any, you can add my: Tested-by: Ryan Harkin <ryan.harkin@xxxxxxxxxx> I'm afraid I'm not knowledgeable enough to review the code. -- 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
