Messages in this thread | | | Date | Thu, 24 Feb 2022 13:29:11 +0800 | Subject | Re: [PATCH v6 01/11] iommu: Add dma ownership management interfaces | From | Lu Baolu <> |
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On 2/24/22 1:16 PM, Lu Baolu wrote: > Hi Robin and Jason, > > On 2/24/22 2:02 AM, Jason Gunthorpe wrote: >> On Wed, Feb 23, 2022 at 06:00:06PM +0000, Robin Murphy wrote: >> >>> ...and equivalently just set owner_cnt directly to 0 here. I don't see a >>> realistic use-case for any driver to claim the same group more than >>> once, >>> and allowing it in the API just feels like opening up various potential >>> corners for things to get out of sync. >> I am Ok if we toss it out to get this merged, as there is no in-kernel >> user right now. > > So we don't need the owner pointer in the API anymore, right?
Oh, NO.
The owner token represents that the group has been claimed for user space access. And the default domain auto-attach policy will be changed accordingly.
So we still need this. Sorry for the noise.
Best regards, baolu
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