Re: [PATCH] docs: kbase/launch_security_sev: QEMU 6.0+ sets iommu=on for us

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On 6/13/22 2:56 AM, Erik Skultety wrote:
> On Sat, Jun 11, 2022 at 12:44:54PM -0400, Cole Robinson wrote:
>> Signed-off-by: Cole Robinson <crobinso@xxxxxxxxxx>
>> ---
>>  docs/kbase/launch_security_sev.rst | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/docs/kbase/launch_security_sev.rst b/docs/kbase/launch_security_sev.rst
>> index 3ebb01ad80..9f6330a1ca 100644
>> --- a/docs/kbase/launch_security_sev.rst
>> +++ b/docs/kbase/launch_security_sev.rst
>> @@ -295,6 +295,8 @@ In order to make virtio devices work, we need to use
>>  ``<driver iommu='on'/>`` inside the given device XML element in order
>>  to enable DMA API in the virtio driver.
>>  
>> +QEMU 6.0 and later will `set this by default <https://gitlab.com/qemu-project/qemu/-/commit/9f88a7a3df>`__. For earlier QEMU versions, you will need to explicitly enable this in the device XML:
> 
> Do we need to link the specific commit in the kbase article? I think simply
> saying (in the same paragrap)
> 
> "... enable DMA API in the virtio driver. Starting with QEMU 6.0.0 QEMU will
> set this for us by default. For earlier versions though, you will need to
> explicitly enable this in the device XML as follows:"
> 
> Reviewed-by: Erik Skultety <eskultet@xxxxxxxxxx>

Thanks, I pushed with your suggested wording

- Cole




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