Module Name: src Committed By: rin Date: Mon Aug 26 17:18:42 UTC 2019
Modified Files: src/sys/arch/arm/conf: Makefile.arm Log Message: PR kern/54486 Workaround for alignment faults on ARMv6+, at least occur with axe(4) and athn(4) drivers. For ARMv6+, unaligned access is enabled by default. However, it cannot be used for non-cacheable memory, which is used as DMA buffers. This results in alignment faults above. A real fix is to use cacheable memory as DMA buffers. However, it breaks some drivers, awge(4) and vchiq(4) at least. Until we figure out problems and fix them, we choose a fail-safe workaround here; forbid unaligned memory access for whole kernel. Affects on performance is negligibly small as far as we can see. XXX pullup netbsd-9 To generate a diff of this commit: cvs rdiff -u -r1.49 -r1.50 src/sys/arch/arm/conf/Makefile.arm Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.