On Thu, 30 Jul 2020 at 02:36, Atish Patra <atish.patra@xxxxxxx> wrote: > > 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 > Thanks Atish. I think these patches have now reached a state where you can stop sending out new revisions until you have something that works as expected in combination with EDK2 based firmware that implements the UEFI runtime services fully. > 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 >
