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From: Joerg Roedel <>
To: Sinan Kaya <>
Cc: Gil Kupfer <>,,,,,,,
	Gil Kupfer <>,
	Will Deacon <>
Subject: Re: [RFC/RFT] Add noats flag to boot parameters
Date: Thu, 3 May 2018 15:59:21 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, May 03, 2018 at 09:46:34AM -0400, Sinan Kaya wrote:
> I also like the idea in general.
> Minor nit..
> Shouldn't this be an iommu parameter rather than a PCI kernel command line parameter?
> We now have an iommu.passthrough argument that prevents page translation.
> Doesn't this fit into the same category especially when it is the IOMMU drivers that
> call ATS functions for enablement not the PCI drivers.

ATS is a bit of a grey area between PCI and IOMMU, but since ATS is
PCI-specific and the code to enable/disable it is in PCI as well, I
think the parameter makes sense for PCI too.


  reply	other threads:[~2018-05-03 13:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-29 18:16 Gil Kupfer
2018-05-03 13:35 ` Joerg Roedel
2018-05-03 13:46   ` Sinan Kaya
2018-05-03 13:59     ` Joerg Roedel [this message]
2018-05-03 14:23       ` Sinan Kaya
2018-05-03 22:15         ` Nadav Amit
2018-05-03 22:52         ` Bjorn Helgaas
2018-05-10 23:09 ` Bjorn Helgaas

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