linux-kernel - Re: IOTLB support for vhost/vsock breaks crosvm on Android

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Message-ID: <20220817134821.GA12615@willie-the-truck>
Date:   Wed, 17 Aug 2022 14:48:22 +0100
From:   Will Deacon <will@...nel.org>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     stefanha@...hat.com, jasowang@...hat.com,
        torvalds@...ux-foundation.org, ascull@...gle.com, maz@...nel.org,
        keirf@...gle.com, jiyong@...gle.com, kernel-team@...roid.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        crosvm-dev@...omium.org
Subject: Re: IOTLB support for vhost/vsock breaks crosvm on Android

On Mon, Aug 08, 2022 at 08:45:48AM -0400, Michael S. Tsirkin wrote:
> > > Also yes, I think it's a good idea to change crosvm anyway.  While the
> > > work around I describe might make sense upstream I don't think it's a
> > > reasonable thing to do in stable kernels.
> > > I think I'll prepare a patch documenting the legal vhost features
> > > as a 1st step even though crosvm is rust so it's not importing
> > > the header directly, right?
> > 
> > Documentation is a good idea regardless, so thanks for that. Even though
> > crosvm has its own bindings for the vhost ioctl()s, the documentation
> > can be reference or duplicated once it's available in the kernel headers.
> > 
> So for crosvm change, I will post the documentation change and
> you guys can discuss?

FYI, the crosvm patch is merged here:

https://github.com/google/crosvm/commit/4e7d00be2e135b0a2d964320ea4276e5d896f426

Will