Re: [RFC PATCH v2 1/9] Add Rust SEV library as subproject

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 16/10/23 11:16, Daniel P. Berrangé wrote:
> On Fri, Oct 13, 2023 at 02:20:16PM -0400, Tyler Fanelli wrote:
>> Hi Manos,
>>
>> Thanks for the heads up, I was using rust 1.71.1. Will update the series
>> with 1.72.1
>>
>> Stefan, Philippe, or Daniel: is there a specific policy for the Rust version
>> we should be developing on for crates in qemu?
> 
> There are a couple of dimensions to this.
> 
> First is the matter of what operating system and architecture pairs are
> supported as targets for the Rust toolchain, and the standard library.
> We'll need both to work of course.
> 
> Second there is the matter of what versions of Rust are shipped in the
> various operating systems currently.
> 
> In a previous discussion there was a wiki page fleshed out with this
> info:
> 
>     https://wiki.qemu.org/RustInQemu
> 
> but the min versions are certainly out of date now.
> 
> Third there is the question of whether distros have facility for pulling
> in newer toolchain versions, and if so should we be willing to use them.
> This is relevant for the long life distros like RHEL, which might ship
> with a variety of Rust versions. Historically we've been very conservative
> but with Python last year we adopted a more aggressive policy of being
> willing to take any newer version available from the distro vendor, not
> merely the oldest baseline. I suspect we'll want a similar approach with
> rust.

Cc'ing distrib package maintainers to have their feedback on this.

> Anyhow, I think you could probably start by updatnig that RustInQemu
> wiki page so that it reflects the current state of the world in terms
> of support tiers and versions.