Re: [PATCH v5 0/4] Allow bigger 64bit window by removing default DMA window

[Michael Ellerman]

On Wed, 5 Aug 2020 00:04:51 -0300, Leonardo Bras wrote:
> There are some devices in which a hypervisor may only allow 1 DMA window
> to exist at a time, and in those cases, a DDW is never created to them,
> since the default DMA window keeps using this resource.
> 
> LoPAR recommends this procedure:
> 1. Remove the default DMA window,
> 2. Query for which configs the DDW can be created,
> 3. Create a DDW.
> 
> [...]

Applied to powerpc/next.

[1/4] powerpc/pseries/iommu: Create defines for operations in ibm, ddw-applicable
      https://git.kernel.org/powerpc/c/cac3e629086f1b2e31c87a6c9b0130d29843ae86
[2/4] powerpc/pseries/iommu: Update call to ibm, query-pe-dma-windows
      https://git.kernel.org/powerpc/c/80f0251231131d164eddab78d2b6c1b8e37d0093
[3/4] powerpc/pseries/iommu: Move window-removing part of remove_ddw into remove_dma_window
      https://git.kernel.org/powerpc/c/74d0b3994e147a2b503170b5e02f1d07dc086586
[4/4] powerpc/pseries/iommu: Allow bigger 64bit window by removing default DMA window
      https://git.kernel.org/powerpc/c/8c0d51592f6f0123953633d1ecf21e843fce0bfd

cheers