Re: [PATCH 0/3] virtio-iommu: Support VIRTIO_IOMMU_F_BYPASS_CONFIG

[Eric Auger <eric.auger@redhat.com>]

Hi Jean,

On 1/11/22 11:13 AM, Jean-Philippe Brucker wrote:
> Hi Eric,
>
> On Tue, Jan 11, 2022 at 10:02:12AM +0100, Eric Auger wrote:
>> Hi Jean, Michael,
>>
>> On 9/30/21 8:50 PM, Jean-Philippe Brucker wrote:
>>> Replace the VIRTIO_IOMMU_F_BYPASS feature with
>>> VIRTIO_IOMMU_F_BYPASS_CONFIG, which enables a config space bit to switch
>>> global bypass on and off.
>>>
>>> Add a boot-bypass option, which defaults to 'on' to be in line with
>>> other vIOMMUs and to allow running firmware/bootloader that are unaware
>>> of the IOMMU.
>>>
>>> See the spec change for more rationale
>>> https://lists.oasis-open.org/archives/virtio-dev/202109/msg00137.html
>> I guess the kernel bits should be merged in 5.17?
> Yes, they should. I can resend at 5.17-rc1 along with a commit updating
> the linux headers. Or is there a specific process for synchronizing the
> headers?  Looking at git log it looks like scripts/update-linux-headers.sh
> is run by whomever needs new UAPI features.
yes you need to generate the header update patch using

scripts/update-linux-headers.sh once the kernel pieces have landed

Thanks

Eric

>
> Thanks,
> Jean
>