CVSROOT: /cvs
Module name: src
Changes by: mi...@cvs.openbsd.org 2016/01/05 06:47:28
Modified files:
sys/dev/pv : xen.c xenvar.h
Log message:
Memorize the DMA segment's data offset within the page
Grant table references don't convey the information about an actual
offset of the data within the page, however Xen needs to know it.
We (ab)use bus_dma_segment's _ds_boundary member to store it and can
get away with not restoring it's original value atm because neither
i386 nor amd64 bus_dmamap_unload(9) code needs it.
