On Fri, 2016-09-02 at 13:09 +0530, Nikunj A Dadhania wrote: > Benjamin Herrenschmidt <b...@kernel.crashing.org> writes: > > > > > On Fri, 2016-09-02 at 12:02 +0530, Nikunj A Dadhania wrote: > > > > > > The series is a first attempt at enabling Multi-Threaded TCG on > > > PowerPC. > > > Changes that were needed to enable PowerPC are pretty simple; > > > > > > Patch 01: Take a iothread lock during hcall, as hcall can > > > generate io requests > > > 02: For TCG, we were harcoding smt as 1, this gets rid of > > > the limitation > > > > If we do this, we need to implement the shared SPRs properly > > Sure, will have a look at it.
My idea was to have a bitmap of SPRs that are shared. When hitting a shared one, after a write, we call a helper that "sync" the update to all the other threads using run_on_cpu. > > > > and the inter-thread doorbells... > > You mean the below ? > > > > > > > > > TODO > > > ==== > > > Implement msgsndp instructions(door-bell), newer kernels enable > > > it > > > depending on the PVR. I have been using following workaround to > > > boot. > > > https://github.com/nikunjad/qemu/commit/2c10052c5f93418a6b920e6ba > > > 3ce1813fcf50bc4 > > Regards, > Nikunj
