Re: [Qemu-devel] [PATCH qom-cpu for-next 0/2] QOM CPUState, part 12: CPU loops, revisited

["Andreas Färber" <afaerber@suse.de>]

Am 30.07.2013 18:55, schrieb Andreas Färber:
> Hello everyone,
> 
> A short CPUState series for a change: This mini-series replaces our home-grown
> CPU list (first_cpu global and CPUState::next_cpu) with a QTAILQ.
> 
> To avoid repeated QTAILQ_FOREACH(foo, cpus, node) I am proposing a wrapper
> CPU_FOREACH(foo) to hide the implementation details, as requested by mst,
> while keeping inline loops, as requested by Markus.
> 
> The bulk of patch 1 is mechanical for/while loop conversions, except for:
> exec.c: QTAILQ_INSERT_TAIL()
> linux-user/syscall.c: QTAILQ_REMOVE() -- untested!

Ping! The 1.7 merge window is approaching and Michael has ack'ed
adopting the macros introduced in patch 1/2, but that patch has no
review or test reports yet. Riku? Peter? Alex?

Latest rebased version on qom-cpu-12 branch.

Regards,
Andreas

> Having such a stable API will help with vCPU hot-unplug.
> 
> Patch 2 is controversial: It drops qemu_for_each_cpu() on Markus' request.
> I'm including it as RFC to showcase what exactly those suggestions involve.
> Converting from for (cpu = ...) to CPU_FOREACH(cpu) is obviously much more
> straightforward than converting between function and loop, therefore with
> patch 1 in mind, it seems best to still use for loops, which since recently
> no longer require CPUArchState, the original trigger for qemu_for_each_cpu().
> 
> Available for testing at:
> git://github.com/afaerber/qemu-cpu.git qom-cpu-12.v1
> https://github.com/afaerber/qemu-cpu/commits/qom-cpu-12.v1
> 
> Regards,
> Andreas
> 
> From CPUState part 10 v1:
> * Instead of replacing every loop with qemu_for_each_cpu()
>   replace loops with CPU_FOREACH() macro, based on QTAILQ_FOREACH().
> 
> Cc: Markus Armbruster <armbru@redhat.com>
> Cc: Michael S. Tsirkin <mst@redhat.com>
> Cc: Anthony Liguori <anthony@codemonkey.ws>
> Cc: Blue Swirl <blauwirbel@gmail.com>
> Cc: Aurélien Jarno <aurelien@aurel32.net>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Eduardo Habkost <ehabkost@redhat.com>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Cc: Riku Voipio <riku.voipio@iki.fi>
> 
> Andreas Färber (2):
>   cpu: Use QTAILQ for CPU list
>   cpu: Replace qemu_for_each_cpu()
> 
>  arch_init.c               | 11 ++++-----
>  cpus.c                    | 58 ++++++++++++++++++++---------------------------
>  cputlb.c                  |  2 +-
>  dump.c                    | 10 ++++----
>  exec.c                    | 33 ++++++++-------------------
>  gdbstub.c                 | 14 ++++++------
>  hw/acpi/piix4.c           | 20 ++++++++--------
>  hw/arm/boot.c             |  2 +-
>  hw/i386/kvm/clock.c       |  2 +-
>  hw/i386/kvmvapic.c        |  2 +-
>  hw/i386/pc.c              |  3 +--
>  hw/ppc/e500.c             |  2 +-
>  hw/ppc/ppc.c              |  2 +-
>  hw/ppc/spapr.c            |  4 ++--
>  include/qom/cpu.h         | 20 ++++++++--------
>  kvm-all.c                 |  8 +++----
>  linux-user/elfload.c      |  2 +-
>  linux-user/main.c         | 10 +++++---
>  linux-user/syscall.c      | 17 ++------------
>  memory_mapping.c          |  5 ++--
>  monitor.c                 |  2 +-
>  qom/cpu.c                 | 30 ++++++++----------------
>  target-i386/helper.c      |  3 +--
>  target-i386/misc_helper.c |  2 +-
>  target-mips/op_helper.c   | 10 ++++----
>  target-ppc/excp_helper.c  |  2 +-
>  translate-all.c           |  4 ++--
>  27 files changed, 113 insertions(+), 167 deletions(-)
> 


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