Re: [PATCH 0/2] target/riscv: Only build qemu-system-riscv$$ on rv$$ host

[Alistair Francis <alistair23@gmail.com>]

On Wed, Jun 28, 2023 at 12:33 AM Philippe Mathieu-Daudé
<philmd@linaro.org> wrote:
>
> Per Anup Patel in [*]:
>
>  > Currently, we only support running rv64 guest on rv64 host
>  > and rv32 guest on rv32 host.
>  >
>  > In the future, we might support running rv32 guest on rv64
>  > host but as of now we don't see a strong push for it.
>
> Therefore, when only using the KVM accelerator it is pointless
> to build qemu-system-riscv32 on a rv64 host (or qemu-system-riscv64
> on a rv32 host). Restrict meson to only build the correct binary,
> avoiding to waste ressources building unusable code.
>
> [*] https://lore.kernel.org/qemu-devel/CAAhSdy2JeRHeeoEc1XKQhPO3aDz4YKeyQsPT4S8yKJcYTA+AiQ@mail.gmail.com/
>
> Based-on: <20230626232007.8933-1-philmd@linaro.org>
> "target/riscv: Allow building without TCG (KVM-only so far)"
> https://lore.kernel.org/qemu-devel/20230626232007.8933-1-philmd@linaro.org/
>
> Philippe Mathieu-Daudé (2):
>   target/riscv: Only unify 'riscv32/64' -> 'riscv' for host cpu in meson
>   target/riscv: Only build KVM guest with same wordsize as host

Thanks!

Applied to riscv-to-apply.next

Alistair

>
>  meson.build | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
>
> --
> 2.38.1
>
>