Nope, read the paper, read the patches. Only Intel is affected. Arm has two such...

amluto · on Jan 2, 2018

I think you're still misunderstanding. The CPU picks TTBR0 or TTBR1 based on the top significant bit of the VA, irrespective of whether the access was initiated by user or kernel code. This is in contrast to s390, which has separate page tables for user mode and kernel mode. I personally much prefer s390's model.

And yes, I've read quite a few papers, and I wrote a good fraction of the patches.

rurban · on Jan 2, 2018

Oh, thanks. My fault then. I haven't read the arm patches, only the summary.

kev009 · on Jan 3, 2018

I vaguely remember some threads from last decade where Linus trashed PowerPC and s390 TLBs. I wish I could find them and reread with this in mind.

stefanfisk · on Jan 5, 2018

are you thinking of this? http://yarchive.net/comp/powerpc_page_tables.html