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Re: [PATCH] binfmt: Don't consider riscv{32, 64} part of the same family
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From: |
Peter Maydell |
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Subject: |
Re: [PATCH] binfmt: Don't consider riscv{32, 64} part of the same family |
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Date: |
Tue, 3 Dec 2024 10:35:02 +0000 |
On Tue, 3 Dec 2024 at 10:19, Daniel P. Berrangé <berrange@redhat.com> wrote:
> Separatley this from patch, we should also consider whether
> it is time to do the same for aarch64/arm7.
>
> If I look at this page:
>
> https://gpages.juszkiewicz.com.pl/arm-socs-table/arm-socs.html
>
> and sort by 'announced' to see msot recent CPUs first, then
> almost all of them have "NO" in the "aarch32 support" column.
>
> IOW, on modern aarch64 CPUs, qemu-arm is the only viable way
> to run 32-bit usermode binaries AFAICT, and suggests we ought
> to be creating a binfmt rule for that on aarch64 hosts.
What happens if you have a host CPU that *does* support 32-bit
natively and you also register the binfmt rule? Does the
host kernel prefer to execute natively or does it invoke
QEMU? I don't think we want to roll out something that
silently downgrades native execution to emulation...
thanks
-- PMM
- [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Andrea Bolognani, 2024/12/03
- Re: [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Philippe Mathieu-Daudé, 2024/12/03
- Re: [PATCH] binfmt: Don't consider riscv{32, 64} part of the same family, Andrea Bolognani, 2024/12/03
- Re: [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Daniel P . Berrangé, 2024/12/03
- Re: [PATCH] binfmt: Don't consider riscv{32, 64} part of the same family,
Peter Maydell <=
- Re: [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Richard Henderson, 2024/12/03
- Re: [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Daniel P . Berrangé, 2024/12/04
- Re: [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Laurent Vivier, 2024/12/05
Re: [PATCH] binfmt: Don't consider riscv{32,64} part of the same family, Laurent Vivier, 2024/12/04