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* [RFT PATCH v3 0/9] Add UEFI support for RISC-V
@ 2020-07-16 23:40 Atish Patra
  2020-07-16 23:40 ` [RFT PATCH v3 1/9] RISC-V: Move DT mapping outof fixmap Atish Patra
                   ` (8 more replies)
  0 siblings, 9 replies; 17+ messages in thread
From: Atish Patra @ 2020-07-16 23:40 UTC (permalink / raw)
  To: linux-kernel
  Cc: Mark Rutland, linux-efi, Kees Cook, Arnd Bergmann,
	Heinrich Schuchardt, Masahiro Yamada, Anup Patel, Mike Rapoport,
	Atish Patra, Palmer Dabbelt, Zong Li, Paul Walmsley,
	Greentime Hu, linux-riscv, Will Deacon, Ard Biesheuvel,
	linux-arm-kernel

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


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^ permalink raw reply	[flat|nested] 17+ messages in thread
end of thread, other threads:[~2020-07-21  9:31 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-16 23:40 [RFT PATCH v3 0/9] Add UEFI support for RISC-V Atish Patra
2020-07-16 23:40 ` [RFT PATCH v3 1/9] RISC-V: Move DT mapping outof fixmap Atish Patra
2020-07-17  6:32   ` Arnd Bergmann
2020-07-18  1:05     ` Atish Patra
2020-07-18  9:24       ` Arnd Bergmann
2020-07-21  4:18         ` Atish Patra
2020-07-21  8:57           ` Arnd Bergmann
2020-07-21  9:02             ` Ard Biesheuvel
2020-07-21  9:30               ` Anup Patel
2020-07-16 23:40 ` [RFT PATCH v3 2/9] RISC-V: Add early ioremap support Atish Patra
2020-07-16 23:40 ` [RFT PATCH v3 3/9] RISC-V: Implement late mapping page table allocation functions Atish Patra
2020-07-16 23:40 ` [RFT PATCH v3 4/9] include: pe.h: Add RISC-V related PE definition Atish Patra
2020-07-16 23:41 ` [RFT PATCH v3 5/9] RISC-V: Add PE/COFF header for EFI stub Atish Patra
2020-07-16 23:41 ` [RFT PATCH v3 6/9] RISC-V: Add EFI stub support Atish Patra
2020-07-16 23:41 ` [RFT PATCH v3 7/9] efi: Rename arm-init to efi-init common for all arch Atish Patra
2020-07-16 23:41 ` [RFT PATCH v3 8/9] RISC-V: Add EFI runtime services Atish Patra
2020-07-16 23:41 ` [RFT PATCH v3 9/9] RISC-V: Add page table dump support for uefi Atish Patra

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