Re: [PATCH] iommu/dma: Resurrect the "forcedac" option

2021-03-18 Thread Joerg Roedel
On Fri, Mar 05, 2021 at 04:32:34PM +, Robin Murphy wrote: > In converting intel-iommu over to the common IOMMU DMA ops, it quietly > lost the functionality of its "forcedac" option. Since this is a handy > thing both for testing and for performance optimisation on certain > platforms,

Re: [PATCH] iommu/dma: Resurrect the "forcedac" option

2021-03-11 Thread John Garry
On 05/03/2021 16:32, Robin Murphy wrote: In converting intel-iommu over to the common IOMMU DMA ops, it quietly lost the functionality of its "forcedac" option. Since this is a handy thing both for testing and for performance optimisation on certain platforms, reimplement it under the common

Re: [PATCH] iommu/dma: Resurrect the "forcedac" option

2021-03-08 Thread John Garry
On 08/03/2021 13:08, Robin Murphy wrote: On 2021-03-05 17:41, John Garry wrote: On 05/03/2021 16:32, Robin Murphy wrote: In converting intel-iommu over to the common IOMMU DMA ops, it quietly lost the functionality of its "forcedac" option. Since this is a handy thing both for testing and for

Re: [PATCH] iommu/dma: Resurrect the "forcedac" option

2021-03-08 Thread Robin Murphy
On 2021-03-05 17:41, John Garry wrote: On 05/03/2021 16:32, Robin Murphy wrote: In converting intel-iommu over to the common IOMMU DMA ops, it quietly lost the functionality of its "forcedac" option. Since this is a handy thing both for testing and for performance optimisation on certain

Re: [PATCH] iommu/dma: Resurrect the "forcedac" option

2021-03-07 Thread Lu Baolu
Hi Robin, On 3/6/21 12:32 AM, Robin Murphy wrote: In converting intel-iommu over to the common IOMMU DMA ops, it quietly lost the functionality of its "forcedac" option. Since this is a handy thing both for testing and for performance optimisation on certain platforms, reimplement it under the

Re: [PATCH] iommu/dma: Resurrect the "forcedac" option

2021-03-05 Thread John Garry
On 05/03/2021 16:32, Robin Murphy wrote: In converting intel-iommu over to the common IOMMU DMA ops, it quietly lost the functionality of its "forcedac" option. Since this is a handy thing both for testing and for performance optimisation on certain platforms, reimplement it under the common