Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

To: Jason Gunthorpe <jgg@xxxxxxxxxx>
Subject: Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
From: Christoph Hellwig <hch@xxxxxx>
Date: Wed, 6 Apr 2022 18:10:31 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>, Christian Benvenuti <benve@xxxxxxxxx>, Cornelia Huck <cohuck@xxxxxxxxxx>, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Jason Wang <jasowang@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-arm-msm@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, Matthew Rosato <mjrosato@xxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Nelson Escobar <neescoba@xxxxxxxxx>, netdev@xxxxxxxxxxxxxxx, Rob Clark <robdclark@xxxxxxxxx>, Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, Will Deacon <will@xxxxxxxxxx>, "Tian, Kevin" <kevin.tian@xxxxxxxxx>
In-reply-to: <20220406160623.GI2120790@nvidia.com>
References: <1-v1-ef02c60ddb76+12ca2-intel_no_snoop_jgg@nvidia.com> <db5a6daa-bfe9-744f-7fc5-d5167858bc3e@arm.com> <20220406142432.GF2120790@nvidia.com> <20220406151823.GG2120790@nvidia.com> <20220406155056.GA30433@lst.de> <20220406160623.GI2120790@nvidia.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Wed, Apr 06, 2022 at 01:06:23PM -0300, Jason Gunthorpe wrote:
> On Wed, Apr 06, 2022 at 05:50:56PM +0200, Christoph Hellwig wrote:
> > On Wed, Apr 06, 2022 at 12:18:23PM -0300, Jason Gunthorpe wrote:
> > > > Oh, I didn't know about device_get_dma_attr()..
> > 
> > Which is completely broken for any non-OF, non-ACPI plaform.
> 
> I saw that, but I spent some time searching and could not find an
> iommu driver that would load independently of OF or ACPI. ie no IOMMU
> platform drivers are created by board files. Things like Intel/AMD
> discover only from ACPI, etc.

s390?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Follow-Ups:
- Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Jason Gunthorpe

References:
- [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Jason Gunthorpe
- Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Robin Murphy
- Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Jason Gunthorpe
- Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Jason Gunthorpe
- Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Christoph Hellwig
- Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
  - From: Jason Gunthorpe

Prev by Date: Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
Next by Date: Re: [PATCH V2] s390: Simplify the calculation of variables
Previous by thread: Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
Next by thread: Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()
Index(es):
- Date
- Thread

[Index of Archives] [Kernel Development] [Kernel Newbies] [IDE] [Security] [Git] [Netfilter] [Bugtraq] [Yosemite Info] [MIPS Linux] [ARM Linux] [Linux Security] [Linux RAID] [Linux ATA RAID] [Samba] [Linux Media] [Device Mapper]