Re: [edk2-devel] [PATCH 1/1] OvmfPkg/RiscVVirt/README.md: bring your own OpenSBI

["Sunil V L" <sunilvl@ventanamicro.com>]

Hi Laszlo,

On Thu, Sep 07, 2023 at 04:58:25PM +0200, Laszlo Ersek wrote:
> Explain how users can compose their pre-OS environment purely from
> binaries they've built themselves.
> 
> Cc: Andrei Warkentin <andrei.warkentin@intel.com>
> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Jordan Justen <jordan.l.justen@intel.com>
> Cc: Sunil V L <sunilvl@ventanamicro.com>
> Signed-off-by: Laszlo Ersek <lersek@redhat.com>
> ---
> 
> Notes:
>     rendered version:
>     
>     https://github.com/lersek/edk2/tree/bring-your-own-opensbi/OvmfPkg/RiscVVirt#test-with-your-own-opensbi-binary
> 
>  OvmfPkg/RiscVVirt/README.md | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/OvmfPkg/RiscVVirt/README.md b/OvmfPkg/RiscVVirt/README.md
> index 8c3ac37b802a..dbb40bbe89b0 100644
> --- a/OvmfPkg/RiscVVirt/README.md
> +++ b/OvmfPkg/RiscVVirt/README.md
> @@ -69,3 +69,20 @@ Below example shows how to boot openSUSE Tumbleweed E20.
>          -device virtio-net-pci,netdev=net0 \
>          -device virtio-blk-device,drive=hd0 \
>          -drive file=openSUSE-Tumbleweed-RISC-V-E20-efi.riscv64.raw,format=raw,id=hd0
> +
> +## Test with your own OpenSBI binary
> +Using the above QEMU command line, **RISCV_VIRT_CODE.fd** is launched by the
> +OpenSBI binary that is bundled with QEMU. You can build your own OpenSBI binary
> +as well:
> +
> +    OPENSBI_DIR=...
> +    git clone https://github.com/riscv/opensbi.git $OPENSBI_DIR
> +    make -C $OPENSBI_DIR \
> +        -j $(getconf _NPROCESSORS_ONLN) \
> +        CROSS_COMPILE=riscv64-linux-gnu- \
> +        PLATFORM=generic
> +
Do we need to duplicate these OpenSBI build instructions in EDK2? IMO,
we should just document how to use -bios to use custom OpenSBI image.
The build instructions for other software repos can change at any
time.

Thanks,
Sunil
> +then specify that binary for QEMU, with the following additional command line
> +option:
> +
> +    -bios $OPENSBI_DIR/build/platform/generic/firmware/fw_dynamic.bin


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