Re: [PATCH] iommu/arm-smmu-v3: add nr_ats_masters to avoid unnecessary operations

On 2019/8/14 1:10, Will Deacon wrote: > On Mon, Aug 12, 2019 at 11:42:17AM +0100, John Garry wrote: >> On 01/08/2019 13:20, Zhen Lei wrote: >>> When (smmu_domain->smmu->features & ARM_SMMU_FEAT_ATS) is true, even if a >>> smmu domain does not contain any ats master, the operations of >>> arm_smm

RE: [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook

Tested-by: Krishna Reddy Validated the entire patch set on Tegra194 SOC based platform and confirmed that arm-smmu driver is functional as it has been. -KR -Original Message- From: Robin Murphy Sent: Friday, August 9, 2019 10:08 AM To: w...@kernel.org Cc: iommu@lists.linux-foundation

Re: [PATCH] iommu/arm-smmu-v3: add nr_ats_masters to avoid unnecessary operations

On Mon, Aug 12, 2019 at 11:42:17AM +0100, John Garry wrote: > On 01/08/2019 13:20, Zhen Lei wrote: > > When (smmu_domain->smmu->features & ARM_SMMU_FEAT_ATS) is true, even if a > > smmu domain does not contain any ats master, the operations of > > arm_smmu_atc_inv_to_cmd() and lock protection in ar

Re: [PATCH v4 13/22] iommu/vt-d: Enlightened PASID allocation

Hi Eric, Apologize for the delayed response below, On Tue, 16 Jul 2019 11:29:30 +0200 Auger Eric wrote: > Hi Jacob, > On 6/9/19 3:44 PM, Jacob Pan wrote: > > From: Lu Baolu > > > > If Intel IOMMU runs in caching mode, a.k.a. virtual IOMMU, the > > IOMMU driver should rely on the emulation sof

RE: [RFC PATCH] virtio_ring: Use DMA API if guest memory is encrypted

On Wed, Aug 14, 2019 at 12:24:39AM +1000, David Gibson wrote: > On Tue, Aug 13, 2019 at 03:26:17PM +0200, Christoph Hellwig wrote: > > On Mon, Aug 12, 2019 at 07:51:56PM +1000, David Gibson wrote: > > > AFAICT we already kind of abuse this for the VIRTIO_F_IOMMU_PLATFORM, > > > because to handle fo

Re: [RFC PATCH] virtio_ring: Use DMA API if guest memory is encrypted

On Tue, Aug 13, 2019 at 03:26:17PM +0200, Christoph Hellwig wrote: > On Mon, Aug 12, 2019 at 07:51:56PM +1000, David Gibson wrote: > > AFAICT we already kind of abuse this for the VIRTIO_F_IOMMU_PLATFORM, > > because to handle for cases where it *is* a device limitation, we > > assume that if the h

Re: [RFC PATCH] virtio_ring: Use DMA API if guest memory is encrypted

On Mon, Aug 12, 2019 at 07:51:56PM +1000, David Gibson wrote: > AFAICT we already kind of abuse this for the VIRTIO_F_IOMMU_PLATFORM, > because to handle for cases where it *is* a device limitation, we > assume that if the hypervisor presents VIRTIO_F_IOMMU_PLATFORM then > the guest *must* select i

Re: [PATCH v4 0/5] iommu/amd: Convert the AMD iommu driver to the dma-iommu api

On Tue, Aug 13, 2019 at 08:09:26PM +0800, Tom Murphy wrote: > Hi Christoph, > > I quit my job and am having a great time traveling South East Asia. Enjoy! I just returned from my vacation. > I definitely don't want this work to go to waste and I hope to repost it > later this week but I can't g

Re: [PATCH v4 0/5] iommu/amd: Convert the AMD iommu driver to the dma-iommu api

Hi Christoph, I quit my job and am having a great time traveling South East Asia. I definitely don't want this work to go to waste and I hope to repost it later this week but I can't guarantee it. Let me know if you need this urgently. Thanks, Tom On Sat 10 Aug 2019, 3:20 p.m. Christoph Hellwi

Re: [PATCH 2/3] iommu/vt-d: Apply per-device dma_ops

Hi again, On 8/7/19 11:06 AM, Lu Baolu wrote: Hi Christoph, On 8/6/19 2:43 PM, Christoph Hellwig wrote: Hi Lu, I really do like the switch to the per-device dma_map_ops, but: On Thu, Aug 01, 2019 at 02:01:55PM +0800, Lu Baolu wrote: Current Intel IOMMU driver sets the system level dma_ops.