linux-kernel - Re: [PATCH v6 2/2] s390: virtio: PV needs VIRTIO I/O device protection

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Date:   Tue, 14 Jul 2020 13:52:49 +0200
From:   Pierre Morel <pmorel@...ux.ibm.com>
To:     Christian Borntraeger <borntraeger@...ibm.com>,
        linux-kernel@...r.kernel.org
Cc:     pasic@...ux.ibm.com, frankja@...ux.ibm.com, mst@...hat.com,
        jasowang@...hat.com, cohuck@...hat.com, kvm@...r.kernel.org,
        linux-s390@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, thomas.lendacky@....com,
        david@...son.dropbear.id.au, linuxram@...ibm.com,
        hca@...ux.ibm.com, gor@...ux.ibm.com
Subject: Re: [PATCH v6 2/2] s390: virtio: PV needs VIRTIO I/O device
 protection



On 2020-07-14 13:42, Christian Borntraeger wrote:
> 
> On 14.07.20 13:38, Pierre Morel wrote:
>> If protected virtualization is active on s390, the virtio queues are
>> not accessible to the host, unless VIRTIO_F_IOMMU_PLATFORM has been
>> negotiated. Use the new arch_validate_virtio_features() interface to
>> fail probe if that's not the case, preventing a host error on access
>> attempt.
>>
>> Signed-off-by: Pierre Morel <pmorel@...ux.ibm.com>
>> Reviewed-by: Cornelia Huck <cohuck@...hat.com>
>> Acked-by: Halil Pasic <pasic@...ux.ibm.com>
> 
> We will probably move this (and other related code) into a new file,
> but we can do that later.
> As for now:
> 
> Acked-by: Christian Borntraeger <borntraeger@...ibm.com>
> 

Thanks,
Pierre

-- 
Pierre Morel
IBM Lab Boeblingen