If we ported to macOS would these patches be accepted?

[Eric Curtin]

I think crosvm would be very interesting on macOS for Android and other Linux distro VMs.

Just wondering if those patches would be entertained.

[Zihan Chen]

Hi Eric,

We would very much welcome a set of patches to enable macOS support. 

On Mon, Feb 9, 2026 at 12:39 PM Eric Curtin <ericcu...@gmail.com> wrote:

I think crosvm would be very interesting on macOS for Android and other Linux distro VMs.

Just wondering if those patches would be entertained.

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[Dylan Reid]

I have some AI slop, err, "claude assisted changes" that boot to a running init on an M4 MBP. I can try to clean them up and share as a starting point, if you're looking to pick this up more officially.

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/crosvm-dev/CAM6d2BjhL1v-Z5UUxfNmidqHY-2kBru27tOAoWFPZAYfspqEeA%40mail.gmail.com.

[Eric Curtin]

If I knew those existed. I would have considered just cleaning those
up. I have a little domain knowledge from using libkrun for a year or
two, so kinda relying on that. But I'm a bit deep into my own
implementation now.

Is mise le meas/Regards,

Eric Curtin

[Manish Bhatt]

Happy to help un-slopify the patches if needed. 

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/crosvm-dev/CANpvso4VkzcgdnUdpgQ1M6q4u9uR7zsE_5q%2BOfFc-T3Gqj5Fww%40mail.gmail.com.

[Dylan Reid]

These didn't exist until this past weekend. I'll try to get them cleaned up this weekend and post them in case anyone wants to take a look. My interest was to explore AI development on a familiar code base. I didn't put a lot of thought into it, but having crosvm finally work on my mac is pretty nice:)

[Dylan Reid]

https://github.com/dgreid/crosvm/tree/topic/macos

This boots to a shell. That's all the testing I have done. I'd tackle network next, then GPU/display, but I won't have time.

Disclaimers:

- Claude did a lot of the heavy lifting here.

- I've been away from crosvm for a few years and am rusty.

- I've never looked at macos code before.

With all that said, I think it's a reasonable base to work from if someone is motivated to finish the port.

[Keiichi Watanabe]

Hi Dylan,

That's awesome!

How did you build the guest kernel? I tried your branch on my M4 macbook with a prebuilt bzImage used in crosvm's tests,  it got stuck after printing a few logs:

INFO  crosvm::crosvm::sys::macos] Starting VM on macOS with Hypervisor.framework
INFO  crosvm::crosvm::sys::macos] VM configuration: memory=512MB, vcpus=1
INFO  crosvm::crosvm::sys::macos] HVF GIC distributor size: 0x10000
INFO  crosvm::crosvm::sys::macos] HVF GIC redistributor size (per CPU): 0x20000
INFO  crosvm::crosvm::sys::macos] HVF GIC redistributor region size: 0x2000000
INFO  crosvm::crosvm::sys::macos] Using userspace GIC (in-kernel GIC disabled)
INFO  crosvm::crosvm::sys::macos] Kernel loaded at 0x80000000, entry=0x80000000, size=9122304
INFO  crosvm::crosvm::sys::macos] Starting VM execution with 1 VCPUs
INFO  crosvm::crosvm::sys::macos] VCPU 0 starting
INFO  crosvm::crosvm::sys::macos] SMCCC: Saving X4=0x0 before PSCI handling
INFO  crosvm::crosvm::sys::macos] PSCI call: function_id=0x84000000, X1=0x0, X2=0x0, X3=0x0
INFO  crosvm::crosvm::sys::macos] PSCI VERSION called, returning 1.1

Best,

Keiichi

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/crosvm-dev/CAMD97pJdpe4q5PWL2JUA_EB3HcSiL%3DHdipTS6E-xuvBi0BafZw%40mail.gmail.com.

[Dylan Reid]

Hi Keiichi,

Ah sorry I forgot. I bet that's because the kernel needs 16k pages to run on m4.

I built 192c0159402e with the attached config. But I bet the key one is setting ARM64_16K_PAGES.

Let me know if that helps.

---

From: Keiichi Watanabe <keii...@google.com>
Sent: Saturday, February 14, 2026 12:00 AM
To: Dylan Reid <dy...@rivosinc.com>
Cc: Manish Bhatt <manish.b...@gmail.com>; Eric Curtin <ericcu...@gmail.com>; Zihan Chen <ziha...@google.com>; crosvm-dev <crosv...@chromium.org>; Dylan Reid <dgr...@meta.com>
Subject: Re: If we ported to macOS would these patches be accepted?

 

[Eric Curtin]

I have a patch here that boots 4k and 16k kernels. But I am going to
pause all efforts until we decide with patch to base things on, to
avoid duplicate effort:

https://github.com/ericcurtin/crosvm/pull/1

[Eric Curtin]

If the implementation is best you'd be able to run either 16k or 4k kernels. libkrun/krunkit is a great reference implementation FWIW.

Is mise le meas/Regards,

Eric Curtin

On Sat, 14 Feb 2026, 19:37 Manish Bhatt, <manish.b...@gmail.com> wrote:

I’ll check it out next week. 

[Manish Bhatt]

I’ll check it out next week. 

On Sat, Feb 14, 2026 at 1:48 AM Dylan Reid <dgr...@meta.com> wrote:

[Eric Curtin]

I have a patch here that boots 4k and 16k kernels. But I am going to
pause all efforts until we decide with patch to base things on, to
avoid duplicate effort:

https://github.com/ericcurtin/crosvm/pull/1

Is mise le meas/Regards,

Eric Curtin

[Keiichi Watanabe]

Hi Dylan, Eric,

Thank you both for your efforts on this.

Eric, thank you for creating a CL at https://crrev.com/c/7581597. I added some comments there.
If you are interested in leading this and contributing patches to the mainline, I’d be more than happy to review them. It would be great to see the review process through to completion and get macOS support landed.

Dylan, thank you for sharing your prototype. It’s a great reference for us as we move forward. Since you mentioned you won't have time to finish the port, we will definitely look at your work as a valuable resource.

Best regards,
Keiichi