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qemu: avoid Property 'host-arm-cpu.sme' not found #3044

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merged 1 commit into from
Dec 26, 2024

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AkihiroSuda
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Close #3032

SME is available since Apple M4 running macOS 15.2. However, QEMU is not ready to handle SME yet.

Close issue 3032

SME is available since Apple M4 running macOS 15.2.
However, QEMU is not ready to handle SME yet.
- https://gitlab.com/qemu-project/qemu/-/issues/2665
- https://gitlab.com/qemu-project/qemu/-/issues/2721

Signed-off-by: Akihiro Suda <[email protected]>
@jandubois
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It feels wrong to me to unconditionally disable host CPU mode for M4 users, even if they have a fixed QEMU version (e.g. with the UTM fix) installed.

So I think it needs at least an environment variable that lets the user say "don't worry about it, it will be fine". Maybe QEMU_HAS_M4_SUPPORT=1 or something like that.

@AkihiroSuda
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AkihiroSuda commented Dec 25, 2024

So I think it needs at least an environment variable that lets the user say "don't worry about it, it will be fine".

We already have: QEMU_SYSTEM_AARCH64=qemu-system-aarch64 -cpu host

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Thanks, LGTM

@jandubois
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We already have: QEMU_SYSTEM_AARCH64=qemu-system-aarch64 -cpu host

Please include this in the release notes!

@jandubois jandubois merged commit 25c57ea into lima-vm:master Dec 26, 2024
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QEMU on macOS 15.2 on Apple M4: qemu-system-aarch64: Property 'host-arm-cpu.sme' not found
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