On 06/12/2018 10:19 PM, Greg Kurz wrote:
> I'm confused... I don't see anything related to HTM in TCG. Also we have
> the following in cap_htm_apply():
>
> if (tcg_enabled()) {
> error_setg(errp,
> "No Transactional Memory support in TCG, try cap-htm=off");
>
> I'm probably missing something... can you enlighten me ?
One of the two IBM machines -- and I thought it was ppc not s390x, but the code
you quote seems to deny that memory -- has stub support for TM within TCG.
To wit, the instructions are recognized and transactions always fail. Which is
not a bad way to test the required fallback paths that rarely fail on hardware.
;-)
r~
