Re: [PATCH 2/4] arm64: tlb: Add tlbi workaround for FUJITSU-MONAKA Erratum E#030001

[Will Deacon]

On Fri, Oct 02, 2026 at 07:26:50PM +0900, Tomohiro Misono wrote:
> FUJITSU-MONAKA Erratum E#030001 affects FUJITSU-MONAKA CPU
> when using 64k page size.
> 
> On affected FUJITSU-MONAKA CPUs, range-based TLBI operations
> targeting a VA or IPA may fail to invalidate TLB entries when
> addr[34:29] == all 1 && addr[28:0] == 0 for 512MB mappings.
> The affected instructions are:
>   RVA[L]E{1,2,3}*, RVAA[L]E1*, and RIPAS2[L]E1*.
> 
> Work around the erratum by issuing additional non-range
> TLBI instructions corresponding to the affected VA or IPA
> range-based TLBI operations.

Why don't we just avoid using range invalidation on these parts instead?

Will