On 8/12/20 9:03 PM, David Gibson wrote:
On Wed, Aug 12, 2020 at 02:33:33PM -0700, Richard Henderson wrote:
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>
Applied to ppc-for-5.2, thanks.
Thanks Peter, Richard and David.
Best regards,
Gustavo
