This series adds UEFI support for RISC-V. Linux kernel: 5.8-rc5 + "mm & exception handing fixes" series U-Boot: master OpenSBI: master This series depends on earlier mm fixes series http://lists.infradead.org/pipermail/linux-riscv/2020-July/001208.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_v3 The patches have been verified on Qemu 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. EDK2 can boot quite far into Linux with current series. Currently, we are seeing some traps from drivers (spi/network). At first glance, they don't seem to be caused by efi. I thought it is better to get some early feedback on the series while EDK2 issue is being debugged. 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 the value returned from U-Boot not kernel :). 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 | 4 + 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 | 16 +- arch/riscv/kernel/vmlinux.lds.S | 22 ++- arch/riscv/mm/init.c | 100 ++++++++---- 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, 823 insertions(+), 51 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
