[PATCH V2] arm64: kernel: disable CNP on Carmel

[Will Deacon]

On Tue, 23 Mar 2021 17:28:09 -0700, Rich Wiley wrote:
> On NVIDIA Carmel cores, CNP behaves differently than it does on standard
> ARM cores. On Carmel, if two cores have CNP enabled and share an L2 TLB
> entry created by core0 for a specific ASID, a non-shareable TLBI from
> core1 may still see the shared entry. On standard ARM cores, that TLBI
> will invalidate the shared entry as well.
> 
> This causes issues with patchsets that attempt to do local TLBIs based
> on cpumasks instead of broadcast TLBIs. Avoid these issues by disabling
> CNP support for NVIDIA Carmel cores.

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: kernel: disable CNP on Carmel
      https://git.kernel.org/arm64/c/20109a859a9b

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
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