Re: [RFC v6 3/4] cpu-timers, icount: new modules

[Thomas Huth <thuth@redhat.com>]

On 18/06/2020 21.04, Claudio Fontana wrote:
> refactoring of cpus.c continues with cpu timer state extraction.
> 
> cpu-timers: responsible for the cpu timers state, and for access to
> cpu clocks and ticks.
> 
> icount: counts the TCG instructions executed. As such it is specific to
> the TCG accelerator. Therefore, it is built only under CONFIG_TCG.
> 
> One complication is due to qtest, which misuses icount to warp time
> (qtest_clock_warp). In order to solve this problem, detach instead qtest
> from icount, and use a trivial separate counter for it.
> 
> This requires fixing assumptions scattered in the code that
> qtest_enabled() implies icount_enabled().
> 
> No functionality change.
> 
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
> ---
>  MAINTAINERS                  |   2 +
>  accel/qtest.c                |   6 +-
>  accel/tcg/cpu-exec.c         |  43 ++-
>  accel/tcg/tcg-all.c          |   7 +-
>  accel/tcg/translate-all.c    |   3 +-
>  docs/replay.txt              |   6 +-
>  exec.c                       |   4 -
>  hw/core/ptimer.c             |   8 +-
>  hw/i386/x86.c                |   1 +
>  include/exec/cpu-all.h       |   4 +
>  include/exec/exec-all.h      |   4 +-
>  include/qemu/timer.h         |  22 +-
>  include/sysemu/cpu-timers.h  |  81 +++++
>  include/sysemu/cpus.h        |  12 +-
>  include/sysemu/qtest.h       |   2 +
>  include/sysemu/replay.h      |   4 +-
>  replay/replay.c              |   6 +-
>  softmmu/Makefile.objs        |   2 +
>  softmmu/cpu-timers.c         | 284 ++++++++++++++++
>  softmmu/cpus.c               | 750 +------------------------------------------
>  softmmu/icount.c             | 499 ++++++++++++++++++++++++++++
>  softmmu/qtest.c              |  34 +-
>  softmmu/timers-state.h       |  69 ++++
>  softmmu/vl.c                 |   8 +-
>  stubs/Makefile.objs          |   3 +-
>  stubs/clock-warp.c           |   4 +-
>  stubs/cpu-get-clock.c        |   3 +-
>  stubs/cpu-get-icount.c       |  21 --
>  stubs/icount.c               |  22 ++
>  stubs/qemu-timer-notify-cb.c |   8 +
>  stubs/qtest.c                |   5 +
>  target/alpha/translate.c     |   3 +-
>  target/arm/helper.c          |   7 +-
>  target/riscv/csr.c           |   8 +-
>  tests/ptimer-test-stubs.c    |   7 +-
>  tests/test-timed-average.c   |   2 +-
>  util/main-loop.c             |   4 +-
>  util/qemu-timer.c            |  12 +-
>  38 files changed, 1119 insertions(+), 851 deletions(-)
>  create mode 100644 include/sysemu/cpu-timers.h
>  create mode 100644 softmmu/cpu-timers.c
>  create mode 100644 softmmu/icount.c
>  create mode 100644 softmmu/timers-state.h
>  delete mode 100644 stubs/cpu-get-icount.c
>  create mode 100644 stubs/icount.c
>  create mode 100644 stubs/qemu-timer-notify-cb.c

This is missing a modification to dma-helpers.c that also uses
use_icount (see the mail from patchew).

 Thomas