linux-kernel - Re: [PATCH v2 0/6] Remove default DMA window before creating DDW

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Date:   Wed, 24 Jun 2020 12:54:27 -0300
From:   Leonardo Bras <leobras.c@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Ram Pai <linuxram@...ibm.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/6] Remove default DMA window before creating DDW

On Wed, 2020-06-24 at 03:24 -0300, Leonardo Bras wrote:
> Patch #5:
> Instead of destroying the created DDW if it doesn't map the whole
> partition, make use of it instead of the default DMA window.
> 
> Patch #6:
> Changes the way iommu_bypass_supported_pSeriesLP() check for 
> iommu_bypass: instead of checking the address returned by enable_ddw(),
> it checks a new output value that reflects if the DDW created maps
> the whole partition.

Patches #5 and #6 were sent more as a RFC, but since they depend on the
series, I decided adding them here.