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From:   Cornelia Huck <cohuck@redhat.com>
To:     "Michael S. Tsirkin" <mst@redhat.com>
Cc:     Halil Pasic <pasic@linux.ibm.com>,
        Jason Wang <jasowang@redhat.com>,
        Xie Yongji <xieyongji@bytedance.com>,
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        linux-kernel@vger.kernel.org, markver@us.ibm.com,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        linux-s390@vger.kernel.org
Subject: Re: [RFC PATCH 1/1] virtio: write back features before verify
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Organization: Red Hat GmbH
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Date:   Mon, 04 Oct 2021 09:01:42 +0200
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On Sat, Oct 02 2021, "Michael S. Tsirkin" <mst@redhat.com> wrote:

> On Fri, Oct 01, 2021 at 05:18:46PM +0200, Cornelia Huck wrote:
>> I'd say we need a hack here so that we assume little-endian config space
>> if VERSION_1 has been offered; if your patch here works, I assume QEMU
>> does what we expect (assmuming little-endian as well.) I'm mostly
>> wondering what happens if you use a different VMM; can we expect it to
>> work similar to QEMU?
>
> Hard to say of course ... hopefully other VMMs are actually
> implementing the spec. E.g. IIUC rust vmm is modern only.

Yes, I kind of hope they are simply doing LE config space accesses.

Are there any other VMMs that are actually supported on s390x (or other
BE architectures)?