[U-Boot] [PATCH 0/7] SMP support for RISC-V

[Philipp Tomsich]

On 11.02.2019, at 23:13, Lukas Auer <lukas.auer at aisec.fraunhofer.de> wrote:
> 
> This patch series adds SMP support for RISC-V to U-Boot. It allows
> U-Boot to run on multi-hart systems and will boot images passed to bootm
> on all harts. The bootm command is currently the only one that will boot
> images on all harts, bootefi is not yet supported.

You might want to clarify somewhere that a ‘hart’ is RISC-V terminology
for a hardware thread.

> 
> The patches have been successfully tested on both QEMU (machine and
> supervisor mode) and the HiFive Unleashed board [1] (supervisor mode),
> using BBL and OpenSBI.
> Mainline QEMU requires two patches [2, 3] to run in this configuration.
> I will send a follow-up patch to enable SMP support on the HiFive
> Unleashed board.
> 
> [1]: https://patchwork.ozlabs.org/project/uboot/list/?series=91125
> [2]: https://patchwork.ozlabs.org/patch/1039493/
> [3]: https://patchwork.ozlabs.org/patch/1039082/
> 
> 
> Lukas Auer (7):
>  riscv: add infrastructure for calling functions on other harts
>  riscv: import the supervisor binary interface header file
>  riscv: implement IPI platform functions using SBI
>  riscv: delay initialization of caches and debug UART
>  riscv: add support for multi-hart systems
>  riscv: boot images passed to bootm on all harts
>  riscv: qemu: enable SMP
> 
> arch/riscv/Kconfig                   |  36 +++++++++
> arch/riscv/cpu/start.S               | 116 +++++++++++++++++++++++++--
> arch/riscv/include/asm/csr.h         |   1 +
> arch/riscv/include/asm/global_data.h |   5 ++
> arch/riscv/include/asm/sbi.h         |  94 ++++++++++++++++++++++
> arch/riscv/include/asm/smp.h         |  53 ++++++++++++
> arch/riscv/lib/Makefile              |   2 +
> arch/riscv/lib/bootm.c               |  13 ++-
> arch/riscv/lib/sbi_ipi.c             |  25 ++++++
> arch/riscv/lib/smp.c                 | 110 +++++++++++++++++++++++++
> board/emulation/qemu-riscv/Kconfig   |   1 +
> 11 files changed, 447 insertions(+), 9 deletions(-)
> create mode 100644 arch/riscv/include/asm/sbi.h
> create mode 100644 arch/riscv/include/asm/smp.h
> create mode 100644 arch/riscv/lib/sbi_ipi.c
> create mode 100644 arch/riscv/lib/smp.c
> 
> -- 
> 2.20.1
> 
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