[PATCH v8 0/7] Add UEFI support for RISC-V

From: Atish Patra
Date: Thu Sep 17 2020 - 18:47:44 EST

This series adds UEFI support for RISC-V.

Linux kernel: v5.9-rc5
U-Boot: v2020.07
OpenSBI: master

Patch 1-3 are generic riscv feature addition required for UEFI support.
Patch 4-5 adds the efi stub support for RISC-V which was reviewed few months back.
Patch 6 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_5.10_v8

@Palmer: I have dropped the following 2 patches from last series (v7)
as this is already part of the shared efi-tree. I am assuming you are pulling
these two from there. The above github tree contains all the patches in order
as per Ard's suggestion.

87a1eeea8e7a include: pe.h: Add RISC-V related PE definition
76fdd4313434 efi: Rename arm-init to efi-init common for all arch

The patches have been verified on following platforms:
1. Qemu (both RV32 & RV64) for the following bootflow
OpenSBI->U-Boot->Linux
EDK2->Linux
2. HiFive unleashed using (RV64) for the following bootflow
OpenSBI->U-Boot->Linux
EDK2->Linux

Thanks Abner & Daniel for all work done for EDK2.
The EDK2 instructions are available here.
https://github.com/JohnAZoidberg/riscv-edk2-docker/

Note:
1. Currently, EDK2 RISC-V port doesn't support OVMF package. That's why
EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER should be enabled to load initrd via
commandline until OVMF patches are available.

2. For RV32, maximum allocated memory should be 1G as RISC-V kernel can not map
beyond 1G of physical memory for RV32.

3. Runtime services have been verified with fwts on EDK2.

***********************************************************************
[root@fedora-riscv ~]# fwts uefirtvariable
Running 1 tests, results appended to results.log
Test: UEFI Runtime service variable interface tests.
Test UEFI RT service get variable interface. 1 passed
Test UEFI RT service get next variable name interface. 4 passed
Test UEFI RT service set variable interface. 7 passed, 1 warning
Test UEFI RT service query variable info interface. 1 passed
Test UEFI RT service variable interface stress test. 2 passed
Test UEFI RT service set variable interface stress t.. 4 passed
Test UEFI RT service query variable info interface s.. 1 passed
Test UEFI RT service get variable interface, invalid.. 5 passed
Test UEFI RT variable services supported status. 1 skipped

Test |Pass |Fail |Abort|Warn |Skip |Info |
uefirtvariable | 25| | | 1| 1| |
Total: | 25| 0| 0| 1| 1| 0|

***********************************************************************

Changes from v7->v8:
1. Rebased on latest efi series[1].
2. Fixed efi-header for 32 bit.
3. Included RISC-V tweaks from Ard[2].
4. Removed the 2 patches(pe.h & arm init) from v7 as it is going through efi tree.

[1] git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
[2] git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git

Changes from v6->v7:
1. Fixed build error reported on linux-next for patch2.

Changes from v5->v6:
1. Fixed the static declaration for pt_ops.
2. Added Reviewed/Acked-by.

Changes from v4->v5:
1. Late mappings allocations are now done through function pointers.
2. EFI run time services are verified using full linux boot and fwts using 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 (6):
RISC-V: Add early ioremap support
RISC-V: Implement late mapping page table allocation functions
RISC-V: Add PE/COFF header for EFI stub
RISC-V: Add EFI stub support.
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 | 55 +++++++
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 | 2 +
arch/riscv/kernel/efi-header.S | 111 +++++++++++++
arch/riscv/kernel/efi.c | 96 +++++++++++
arch/riscv/kernel/head.S | 17 +-
arch/riscv/kernel/head.h | 2 -
arch/riscv/kernel/image-vars.h | 51 ++++++
arch/riscv/kernel/setup.c | 18 +-
arch/riscv/kernel/vmlinux.lds.S | 23 ++-
arch/riscv/mm/init.c | 191 ++++++++++++++++------
arch/riscv/mm/ptdump.c | 48 +++++-
drivers/firmware/efi/Kconfig | 3 +-
drivers/firmware/efi/Makefile | 2 +
drivers/firmware/efi/libstub/Makefile | 10 ++
drivers/firmware/efi/libstub/efi-stub.c | 11 +-
drivers/firmware/efi/libstub/riscv-stub.c | 109 ++++++++++++
drivers/firmware/efi/riscv-runtime.c | 143 ++++++++++++++++
26 files changed, 891 insertions(+), 66 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
create mode 100644 drivers/firmware/efi/libstub/riscv-stub.c
create mode 100644 drivers/firmware/efi/riscv-runtime.c

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2.25.1