This series adds UEFI support for RISC-V. Linux kernel: 5.8-rc7 + 1 exception vector setup patch (queued for for-next) U-Boot: v2020.07 OpenSBI: master This series depends on early setup of exeception vector patch http://lists.infradead.org/pipermail/linux-riscv/2020-July/001207.html Patch 1-3 are generic riscv feature addition required for UEFI support. Patch 4-7 adds the efi stub support for RISC-V which was reviewed few months back. https://www.spinics.net/lists/linux-efi/msg19144.html Patch 8 just renames arm-init code so that it can be used across different architectures. Patch 11 adds the runtime services for RISC-V. The working set of patches can also be found in following git repo. https://github.com/atishp04/linux/tree/uefi_riscv_5.9_v4 The patches have been verified on Qemu/HiFive unleashed using bootefi command in U-Boot for both RV32 and RV64. For RV32, maximum allocated memory should be 1G as RISC-V kernel can not map beyond 1G of physical memory for RV32. Runtime services have been verified with fwts. Here is the snippet of the result. *********************************************************************** This test run on 16/07/20 at 17:54:53 on host Linux fedora-riscv 5.8.0-rc5-00015-g5e61441080fd-dirty #938 SMP Thu Jul 16 14:50:11 PDT 2020 riscv64. Command: "fwts uefirtvariable". Running tests: uefirtvariable. uefirtvariable: UEFI Runtime service variable interface tests. Test 1 of 9: Test UEFI RT service get variable interface. SKIPPED: Test 1, Skipping test, SetVariable runtime service is not supported on this platform. Test 2 of 9: Test UEFI RT service get next variable name interface. The runtime service GetNextVariableName interface function test. SKIPPED: Test 2, Skipping test, SetVariable runtime service is not supported on this platform. ... Test 4 of 9: Test UEFI RT service query variable info interface. SKIPPED: Test 4, Not support the QueryVariableInfo UEFI runtime interface: cannot test. ADVICE: Firmware also needs to check if the revision of system table is correct or not. Linux kernel returns EFI_UNSUPPORTED as well, if the FirmwareRevision of system table is less than EFI_2_00_SYSTEM_TABLE_REVISION. ... *********************************************************************** Currently, U-Boot EFI implementation returns EFI_UNSUPPORTED for set_variable service. That's why all tests have been skipped but I manually verified that the value is returned from U-Boot not kernel :). EDK2 can boot quite far into Linux with the current series. However, it crashes before userspace because of a possible memory corruption by EDK2. Changes from v3->v4: 1. Used pgd mapping to avoid copying DT to bss. Changes from v2->v3: 1. Fixed few bugs in run time services page table mapping. 2. Dropped patch 1 as it is already taken into efi-tree. 3. Sent few generic mmu fixes as a separate series to ease the merge conflicts. Changes from v1->v2: 1. Removed patch 1 as it is already taken into efi-tree. 2. Fixed compilation issues with patch 9. 3. Moved few function prototype declaration to header file to keep kbuild happy. Changes from previous version: 1. Added full ioremap support. 2. Added efi runtime services support. 3. Fixes mm issues Anup Patel (1): RISC-V: Move DT mapping outof fixmap Atish Patra (8): RISC-V: Add early ioremap support RISC-V: Implement late mapping page table allocation functions include: pe.h: Add RISC-V related PE definition RISC-V: Add PE/COFF header for EFI stub RISC-V: Add EFI stub support. efi: Rename arm-init to efi-init common for all arch RISC-V: Add EFI runtime services RISC-V: Add page table dump support for uefi arch/riscv/Kconfig | 25 +++ arch/riscv/Makefile | 1 + arch/riscv/configs/defconfig | 1 + arch/riscv/include/asm/Kbuild | 1 + arch/riscv/include/asm/efi.h | 56 +++++++ arch/riscv/include/asm/fixmap.h | 16 +- arch/riscv/include/asm/io.h | 1 + arch/riscv/include/asm/mmu.h | 2 + arch/riscv/include/asm/pgtable.h | 5 + arch/riscv/include/asm/sections.h | 13 ++ arch/riscv/kernel/Makefile | 5 + arch/riscv/kernel/efi-header.S | 104 +++++++++++++ arch/riscv/kernel/efi.c | 105 +++++++++++++ arch/riscv/kernel/head.S | 17 ++- arch/riscv/kernel/head.h | 2 - arch/riscv/kernel/image-vars.h | 51 +++++++ arch/riscv/kernel/setup.c | 17 ++- arch/riscv/kernel/vmlinux.lds.S | 22 ++- arch/riscv/mm/init.c | 90 ++++++++--- arch/riscv/mm/ptdump.c | 48 +++++- drivers/firmware/efi/Kconfig | 3 +- drivers/firmware/efi/Makefile | 4 +- .../firmware/efi/{arm-init.c => efi-init.c} | 0 drivers/firmware/efi/libstub/Makefile | 10 ++ drivers/firmware/efi/libstub/efi-stub.c | 11 +- drivers/firmware/efi/libstub/riscv-stub.c | 110 ++++++++++++++ drivers/firmware/efi/riscv-runtime.c | 143 ++++++++++++++++++ include/linux/pe.h | 3 + 28 files changed, 825 insertions(+), 41 deletions(-) create mode 100644 arch/riscv/include/asm/efi.h create mode 100644 arch/riscv/include/asm/sections.h create mode 100644 arch/riscv/kernel/efi-header.S create mode 100644 arch/riscv/kernel/efi.c create mode 100644 arch/riscv/kernel/image-vars.h rename drivers/firmware/efi/{arm-init.c => efi-init.c} (100%) create mode 100644 drivers/firmware/efi/libstub/riscv-stub.c create mode 100644 drivers/firmware/efi/riscv-runtime.c -- 2.24.0
