On Wed, Dec 24, 2014 at 01:21:11AM +0200, Aaro Koskinen wrote: > Hi, > > On Thu, Sep 11, 2014 at 08:30:20AM +0100, Paul Burton wrote: > > Hybrid FPRs is a scheme where scalar FP registers are 64b wide, but > > accesses to odd indexed single registers use bits 63:32 of the > > preceeding even indexed 64b register. In this mode all FP code > > except that built for the plain FP64 ABI can execute correctly. Most > > notably a combination of FP64A & FP32 code can execute correctly, > > allowing for existing FP32 binaries to be linked with new FP64A binaries > > that can make use of 64 bit FP & MSA. > > This commit (4227a2d4efc9c84f35826dc4d1e6dc183f6c1c05, bisected) > in 3.19-rc1 breaks my Loongson-2F system. I get endless amount > of "Reserved instruction in kernel code" exceptions when booting. > See some examples below. Nothing crashes, and there is some forward > progress, but obviously it's completely unusable. > > Any ideas? > > [ 2.872000] Reserved instruction in kernel code[#1]: ... > Code: 30420001 2c420001 0040202d <40038005> 2405feff 00651824 40838005 3c032000 3c052400 0x40038005 = mfc0 v1,$16,5 = mfc0 v1,Config5 Does this help (in linux-next)?: http://git.linux-mips.org/cgit/ralf/upstream-sfr.git/commit/?id=5bba8dec735f18fe7a2fcd8327f28ef095337ff2 Cheers James
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