On 4/7/24 00:32, Richard Henderson wrote: > We already attempted to set and clear can_do_io before the first > and last insns, but only used the initial value of max_insns and > the call to translator_io_start to find those insns. > > Now that we track insn_start in DisasContextBase, and now that > we have emit_before_op, we can wait until we have finished > translation to identify the true first and last insns and emit > the sets of can_do_io at that time. > > This fixes case of a translation block which crossed a page boundary, > and for which the second page turned out to be mmio. In this case we > truncate the block, and the previous logic for can_do_io could leave > a block with a single insn with can_do_io set to false, which would > fail an assertion in cpu_io_recompile. > > Reported-by: Jørgen Hansen <jorgen.han...@wdc.com> > Signed-off-by: Richard Henderson <richard.hender...@linaro.org> > --- > include/exec/translator.h | 1 - > accel/tcg/translator.c | 45 ++++++++++++++++++++------------------- > 2 files changed, 23 insertions(+), 23 deletions(-)
Thanks for the quick fix! I verified the patch series fixes the issue on my setup, and also verified that no issues were seen with full MMIO backing for the otherwise same test case. Tested-by: Jørgen Hansen <jorgen.han...@wdc.com>
