Re: [PATCH kernel] pseries/iommu/ddw: Fix kdump to work in absence of ibm,dma-window

2022-06-27 Thread Alexey Kardashevskiy
On 6/27/22 14:10, Russell Currey wrote: On Thu, 2022-06-16 at 17:59 +1000, Alexey Kardashevskiy wrote: The pseries platform uses 32bit default DMA window (always 4K pages) and optional 64bit DMA window available via DDW ("Dynamic DMA Windows"), 64K or 2M pages. For ages the default one was no

Re: [PATCH kernel] pseries/iommu/ddw: Fix kdump to work in absence of ibm,dma-window

2022-06-26 Thread Russell Currey
On Thu, 2022-06-16 at 17:59 +1000, Alexey Kardashevskiy wrote: > The pseries platform uses 32bit default DMA window (always 4K pages) > and > optional 64bit DMA window available via DDW ("Dynamic DMA Windows"), > 64K or 2M pages. For ages the default one was not removed and a huge > window was crea

[PATCH kernel] pseries/iommu/ddw: Fix kdump to work in absence of ibm,dma-window

2022-06-16 Thread Alexey Kardashevskiy
The pseries platform uses 32bit default DMA window (always 4K pages) and optional 64bit DMA window available via DDW ("Dynamic DMA Windows"), 64K or 2M pages. For ages the default one was not removed and a huge window was created in addition. Things changed with SRIOV-enabled PowerVM which creates