From: "Theo de Raadt" <deraadt@openbsd.org>
Subject: Re: 64-bit DMA
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: Vitaliy Makkoveev <mvs@openbsd.org>, tech@openbsd.org
Date: Wed, 25 Feb 2026 09:08:20 -0700

> That was the heuristic I was leaning towards.  The PCIe variants
> should all work fine with 64-bit addresses.  And most machines with
> old PCI variants will heve less than 4GB of physical memory.

I agree, that seems very plausible and may also be the strategy to do in
other drivers.