Re: [PATCH v3 1/3] Loongson-2F: Flush the branch target history such as BTB and RAS

[Andreas Barth <aba@not.so.argh.org>]

* Wu Zhangjin (wuzhangjin@gmail.com) [100403 03:50]:
> On Fri, 2010-04-02 at 16:54 +0200, Andreas Barth wrote:
> > * Wu Zhangjin (wuzhangjin@gmail.com) [100313 05:45]:
> > > This patch did clear BTB(branch target buffer), forbid RAS(return
> > > address stack) via Loongson-2F's 64bit diagnostic register.
> > 
> > Unfortunatly the Loongson 2F here still fails with this patch,
> > compiled with the new binutils and both options enabled.
> > 
> > Testcase: plain debian unstable chroot, build binutils in that chroot.
> > 
> > More ideas, codes, whatever welcome.


> This patch is not enough, please use the kernel(>=2.6.32) from
> http://dev.lemote.com/code/rt4ls or
> http://dev.lemote.com/code/linux-loongson-community

The kernel vmlinuz-2.6.33-lemote2f-bfs inside of
http://www.anheng.com.cn/loongson/install/loongson2_debian6_20100328.tar.lzma
(linked via linux-loongson-community) fails at the same place:

touch stamp-picdir
if [ x"-fPIC" != x ]; then \
          gcc -c -DHAVE_CONFIG_H -g -O2  -I. -I../../libiberty/../include  -W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic  -fPIC ../../libiberty/regex.c -o pic/regex.o; \
        else true; fi
gcc -c -DHAVE_CONFIG_H -g -O2  -I. -I../../libiberty/../include  -W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic  ../../libiberty/regex.c -o regex.o
if [ x"-fPIC" != x ]; then \
          gcc -c -DHAVE_CONFIG_H -g -O2  -I. -I../../libiberty/../include  -W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic  -fPIC ../../libiberty/cplus-dem.c -o pic/cplus-dem.o; \
        else true; fi


Any other kernel I should try?



Andi