Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote on 27/10/2009 01:00:53: > > On Mon, 2009-10-26 at 16:26 -0700, Dan Malek wrote: > > Just be careful the get_user() doesn't regenerate the same > > translation error you are trying to fix by being here......
yes, I had some problems with this initially but managed to work around that. I noticed another problem though, I got multiple TLB errors for the same address when I did it in C. Noticed by just printk:ing every hit for a dcbX insn in do_page_fault. I can't explain it, but it seems like when moving to C you have to execute a rfi insn and that might somehow restart the dcbX insn before moving on to the page fault routine(or something totally different) > > It shouldn't since it will always come up with a proper DAR but > you may want to double check before hand that your instruction > address you are loading from is -not- your marker value for bad DAR. hmm, I check that the insn really is a dcbX insn, but not that the address is != 0x00f0. Don't see how it could be as if something is wrong with the insn address you get ITLB error instead of a DTLB error. Anyhow, things seems stalled as I haven't heard from Scott or Rex for a while. If this isn't working now, I really don't know what is wrong and need some debugging help. > > > It is nice doing things in C code, but you have to be aware > > of the environment and the side effects when in this kind > > Yup. > > Cheers, > Ben. > > > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
