CVSROOT: /cvs Module name: src Changes by: [email protected] 2021/04/03 09:10:58
Modified files:
sys/arch/arm64/dev: smmu.c
Log message:
Exclude the first page from I/O virtual address space, which is the NULL
pointer address. Not allowing this one to be allocated might help find
driver bugs, where the device is programmed with a NULL pointer. We have
plenty of address space anyway, so excluding this single page does not
hurt at all and can only have positive effects.
Idea from kettenis@
