CVSROOT: /cvs
Module name: src
Changes by: kette...@cvs.openbsd.org 2021/11/11 11:43:05
Modified files:
sys/arch/arm64/dev: apldart.c
Log message:
The Apple DART has a nifty feature that allows us protection of subranges
of a page with a granularity of 32-bit words. Use this to expose just
those parts of memory to devices that we want the device to see. This
means that handing down a small mbuf to a network card driver no longer
gives the hardware access to other mbufs in the same page.
It turns out that bge(4) always does aligned 64-bit access to memory though.
So round up/down to the nearest 64-bit boundary to prevent triggering an
IOMMU fault.
ok patrick@
