On 8/11/20 8:32 AM, Gustavo Romero wrote: > Currently if option '-icount auto' is passed to the QEMU TCG to enable > counting instructions the VM crashes with the following error report when > Linux runs on it: > > qemu-system-ppc64: Bad icount read > > This happens because read/write access to the SPRs PURR, VTB, and TBU40 > is not integrated to the icount framework. > > This commit fixes that issue by making the read/write access of these > SPRs aware of icount framework, adding the proper gen_io_start() calls > before calling the helpers to load/store these SPRs in TCG and ensuring > that the associated TBs end immediately after, accordingly to what's in > docs/devel/tcg-icount.rst. > > Signed-off-by: Gustavo Romero <grom...@linux.ibm.com> > --- > target/ppc/translate_init.inc.c | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+)
Reviewed-by: Richard Henderson <richard.hender...@linaro.org> r~
