Re: [TECH TOPIC] Reaching consensus on CONFIG_HIGHMEM phaseout

Jason Gunthorpe
2025-09-19T14:34:50Z

On Fri, Sep 19, 2025 at 04:22:20PM +0200, Arnd Bergmann wrote:

> SAM9X7 in 2023 added DDR3 mode with up to 256MB according to
> the datasheet, no idea why they chose not to support more,

Quite possible the internal SOC wiring only has 28 address lines. :)

I am right it sounds like we can drop vivt cache support with highmem?
vivt is alot easier to understand if kmap isn't running around
creating virtual addresses aliases!

Jason