[RFC v1 0/2] tcg-cpus: split into 3 tcg variants

[Claudio Fontana]

The purpose of this series is to split the tcg-cpus into
3 variants:

tcg_cpus_mttcg    (multithreaded tcg vcpus)
tcg_cpus_rr       (single threaded round robin vcpus)
tcg_cpus_icount   (same as RR, but using icount)

Alex, I read the comment in tcg_start_vcpu_thread saying:

    /*
     * Initialize TCG regions--once. Now is a good time, because:
     * (1) TCG's init context, prologue and target globals have been set up.
     * (2) qemu_tcg_mttcg_enabled() works now (TCG init code runs before the
     *     -accel flag is processed, so the check doesn't work then).
     */

Is this actually current?

I tried to refactor this (see patch 2), and it seems to work to do
the init of regions in tcg_init, and it seems that mttcg_enabled is known
already at that point..

Ciao,

Claudio

Claudio Fontana (2):
  accel/tcg: split CpusAccel into three TCG variants
  accel/tcg: split tcg_start_vcpu_thread

 accel/tcg/meson.build       |   9 +-
 accel/tcg/tcg-all.c         |  13 +-
 accel/tcg/tcg-cpus-icount.c | 145 +++++++++++
 accel/tcg/tcg-cpus-icount.h |  20 ++
 accel/tcg/tcg-cpus-mttcg.c  | 142 ++++++++++
 accel/tcg/tcg-cpus-mttcg.h  |  25 ++
 accel/tcg/tcg-cpus-rr.c     | 305 ++++++++++++++++++++++
 accel/tcg/tcg-cpus-rr.h     |  26 ++
 accel/tcg/tcg-cpus.c        | 500 +-----------------------------------
 accel/tcg/tcg-cpus.h        |   9 +-
 softmmu/icount.c            |   2 +-
 11 files changed, 697 insertions(+), 499 deletions(-)
 create mode 100644 accel/tcg/tcg-cpus-icount.c
 create mode 100644 accel/tcg/tcg-cpus-icount.h
 create mode 100644 accel/tcg/tcg-cpus-mttcg.c
 create mode 100644 accel/tcg/tcg-cpus-mttcg.h
 create mode 100644 accel/tcg/tcg-cpus-rr.c
 create mode 100644 accel/tcg/tcg-cpus-rr.h

-- 
2.26.2