On Tue, Sep 29, 2015 at 10:27:09AM +0100, Ian Campbell wrote: > We run 4 Arndale boards in our automated test framework, they have > been running quite happily for quite some time using a Debian Wheezy > userspace. > > However when upgrading to a Debian Jessie we started seeing frequent > segmentation faults from gcc when building the kernel, to the extent > that it is unable to successfully build the kernel twice in a row, and > often fails on the first attempt. > > Searching around I found https://bugs.launchpad.net/arndale/+bug/1081417 > which pointed towards http://www.spinics.net/lists/kvm-arm/msg03723.html > and CPU Errata 773022 and 774769. > > This errata needs to be applied to all processors in an SMP system, > meaning that the usual strategy of applying them in > arch/arm/cpu/armv7/start.S is not appropriate (since that applies to > the boot processor only). Instead we apply these errata in the secure > monitor which is code that is traversed by all processors as they are > brought up. > > The net affect on Arndale is that ACTLR changes from 0x40 to > 0x2000042. I ran 17 kernel compile iterations overnight with no > segfaults. > > Runtime testing was done on our v2014.10 based branch and forward > ported (with only minimal and trivial contextual conflicts) to current > master, where it has been build tested only. > > I suppose in theory these errata apply to any Exynos5250 based boards, > but Arndale is the only one I have access to and I have therefore > chosen to be conservative and only apply it there. > > Also, reorder CONFIG_ARM_ERRATA_794072 in README to make the list > numerically sorted. > > Signed-off-by: Ian Campbell <ian.campb...@citrix.com>
Applied to u-boot/master, thanks! -- Tom
signature.asc
Description: Digital signature
_______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
