[dpdk-dev] [PATCH dpdk v2] vfio/ppc64/spapr: Warn if DMA window was created at unexpected offset

Alexey Kardashevskiy aik at ozlabs.ru
Wed Oct 18 07:11:53 CEST 2017

On 18/10/17 03:13, Thomas Monjalon wrote:
> 28/04/2017 13:19, Burakov, Anatoly:
>> From: Alexey Kardashevskiy
>>> VFIO_IOMMU_SPAPR_TCE_CREATE ioctl() returns the actual bus address for
>>> just created DMA window. It happens to start from zero because the default
>>> window is removed (leaving no windows) and new window starts from zero.
>>> However this is not guaranteed and a new window may start from another
>>> address, this adds a check and an error message.
>>> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
>>> ---
>>> Changes:
>>> v2:
>>> * this just prints warning and fails instead of incorrectly changing IOVA
>>> addresses
>>> ---
>> Hi Alexey,
>> There are some compile failures with this patch. You'll probably want to replace %lx with PRIx64 or similar :)
>> I would argue that just saying "DMA offsets other than zero are not supported" will be sufficient and will make error message less confusing. Up to you though.
> Please, can we progress on this patch?
> Is it still a relevant patch?

Nope, http://dpdk.org/browse/dpdk/commit/?id=ed1e7e576be219e1e has the
warning, this is enough really.

> If yes, someone to make a v3, please?


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