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[Bug 1558828] Re: Need enough contiguous memory to support GICv3 ITS table


This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
wily' to 'verification-done-wily'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

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** Tags added: verification-needed-wily

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  Need enough contiguous memory to support GICv3 ITS table

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  The GICv3 ITS table needs between 36K and 56K of contiguous memory.
  But, with 4K pages and a MAX_ZONEORDER of 11, we can only allocate
  32K. The upstream approach to resolve this will likely be to make the
  core GIC a proper device that can use the DMA API:


  However - that's a pretty big change, and will take a while to land.
  Until that time, I propose that we bump MAX_ZONEORDER up to 13 for the
  generic kernel.

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