Linux IOMMU Development
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From: Jason Gunthorpe <jgg@ziepe.ca>
To: laurentiu.tudor@nxp.com
Cc: thierry.reding@gmail.com, robin.murphy@arm.com,
	iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC PATCH] iommu: map reserved memory as cacheable if device is coherent
Date: Wed, 26 Jul 2023 09:22:10 -0300	[thread overview]
Message-ID: <ZMEP8pqztmPw3UmP@ziepe.ca> (raw)
In-Reply-To: <20230725140055.12823-1-laurentiu.tudor@nxp.com>

On Tue, Jul 25, 2023 at 05:00:55PM +0300, laurentiu.tudor@nxp.com wrote:
> From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> 
> Check if the device is marked as DMA coherent in the DT and if so,
> map its reserved memory as cacheable in the IOMMU.
> 
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> ---
>  drivers/iommu/of_iommu.c | 3 +++
>  1 file changed, 3 insertions(+)

This only makes sense for IOMMU_RESV_DIRECT - is that your use case?
Maybe mention that in the commit message

And add a fixes for the commit that introduces IOMMU_RESV_DIRECT into
of_iommu.c

Jason

  reply	other threads:[~2023-07-26 12:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-25 14:00 [RFC PATCH] iommu: map reserved memory as cacheable if device is coherent laurentiu.tudor
2023-07-26 12:22 ` Jason Gunthorpe [this message]
2023-07-26 12:29   ` Laurentiu Tudor
2023-07-26 12:32     ` Jason Gunthorpe

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