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

From: Richard Henderson
Subject: Re: [PATCH 0/2] target/riscv: Only build qemu-system-riscv$$ on rv$$ host
Date: Wed, 28 Jun 2023 09:48:09 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0

On 6/27/23 16:32, Philippe Mathieu-Daudé 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.


Based-on: <20230626232007.8933-1-philmd@linaro.org>
"target/riscv: Allow building without TCG (KVM-only so far)"

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

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

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


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