On Mon, Feb 26, 2018 at 11:30:50AM +0000, Will Deacon wrote: > Damnit, sorry again. I changed the argument order of phys_to_ttbr along > the way, so must've confused myself during the backporting exercise. It's > also one of those things that will lead to potential TLB corruption in rare > circumstances where the junk in TTBR1 ends up giving a valid translation, > so it didn't crop up in my testing. How did Nicolas see this? The bug > report I saw didn't look related. FWIW, we've been hitting this bug with a distribution backport on ThunderX2 on every boot. Due to bad luck there was a non-zero value in TTBR1 that crashed the kernel immediately and dropped us to firmware. --Jan