Messages in this thread | | | From | Logan Gunthorpe <> | Date | Tue, 13 Mar 2018 14:46:31 -0600 | Subject | Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory |
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On 13/03/18 01:53 PM, Sinan Kaya wrote: > I agree disabling globally would be bad. Somebody can always say I have > ten switches on my system. I want to do peer-to-peer on one switch only. Now, > this change weakened security for the other switches that I had no intention > with doing P2P. > > Isn't this a problem?
Well, if it's a problem for someone they'll have to solve it. We're targeting JBOFs that have no use for ACS / IOMMU groups at all.
> Can we specify the BDF of the downstream device we want P2P with during boot via > kernel command line?
That's a painful configuration burden. And then things might stop working if you change your topology at all and now have to change boot parameters.
Logan
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