NACK: [SRU][PATCH 0/1][B/aws, F/aws] aws: properly support instance types with > 255 cpu cores

[Andrea Righi]

I'll send a v2 that includes the patches for G and X.

-Andrea

On Fri, Jan 29, 2021 at 07:34:05PM +0100, Andrea Righi wrote:
> BugLink: https://bugs.launchpad.net/bugs/1913739
> 
> [Impact]
> 
> To properly support instance types in AWS with > 255 cores we need to
> make sure that commit c40aaaac1018ff1382f2d35df5129a6bcea3df6b
> ("iommu/vt-d: Gracefully handle DMAR units with no supported address widths")
> is applied across all our linux-aws kernels.
> 
> [Test Case]
> 
> Tests performed by AWS.
> 
> [Fix]
> 
> Apply/backport commit c40aaaac1018ff1382f2d35df5129a6bcea3df6b.
> 
> [Regression potential]
> 
> The fix is affecting only intel IOMMU and it is an upstream fix, so the
> regression potential should be minimal.