[PATCHv3 11/12] ARM: migrate to common PSCI client code

[Mark Rutland]

On Thu, Jun 04, 2015 at 10:45:30AM +0100, Catalin Marinas wrote:
> Hi Mark,
> 
> On Wed, Jun 03, 2015 at 04:16:39PM +0100, Mark Rutland wrote:
> > On Tue, May 26, 2015 at 02:52:29PM +0100, Mark Rutland wrote:
> > > Now that the common PSCI client code has been factored out to
> > > drivers/firmware, and made safe for 32-bit use, move the 32-bit ARM code
> > > over to it. This results in a moderate reduction of duplicated lines,
> > > and will prevent further duplication as the PSCI client code is updated
> > > for PSCI 1.0 and beyond.
> > > 
> > > The two legacy platform users of the PSCI invocation code are updated to
> > > account for interface changes. In both cases the power state parameter
> > > is changed to an opaque u32 token in preparation for PSCI 1.0 power
> > > state changes.
> > > 
> > > Signed-off-by: Mark Rutland <mark.rutland at arm.com>
> > > Acked-by: Catalin Marinas <catalin.marinas at arm.com>
> > > Cc: Ashwin Chaugule <ashwin.chaugule at linaro.org>
> > > Cc: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
> > > Cc: Rob Herring <robh at kernel.org>
> > > Cc: Russell King <rmk+kernel at arm.linux.org.uk>
> > > Cc: Will Deacon <will.deacon at arm.com>
> > > ---
> > >  arch/arm/Kconfig                  |   1 +
> > >  arch/arm/include/asm/psci.h       |  23 ---
> > >  arch/arm/kernel/Makefile          |   2 +-
> > >  arch/arm/kernel/psci.c            | 299 --------------------------------------
> > >  arch/arm/kernel/psci_smp.c        |  29 +++-
> > >  arch/arm/kernel/setup.c           |   3 +-
> > >  arch/arm/mach-highbank/highbank.c |   2 +-
> > >  arch/arm/mach-highbank/pm.c       |   8 +-
> > >  drivers/cpuidle/cpuidle-calxeda.c |   7 +-
> > >  9 files changed, 32 insertions(+), 342 deletions(-)
> > >  delete mode 100644 arch/arm/kernel/psci.c
> > 
> > Do you have any objections to the arch/arm changes in this patch?
> > 
> > If not, could I please have your ack?
> > 
> > As there are arm, arm64, and drivers changes in the series I was hoping
> > this could all go via arm-soc.
> 
> If we don't hear from Russell by the end of today, I propose that we
> merge patches 1-8 in the arm64 tree (mostly fixes for PSCI). This series
> is blocking other developments like PSCI 1.0, so I really want to get
> parts of it merged in 4.2.

I've pushed the first 8 patches to my arm64/psci-rework branch [1]. I've
pushed the whole series with the tags provided today to psci/rework [2].

I tried a merge with the arm64 for-next/core branch locally, and got a
trivial conflict in smp.c against the changes in "arm64: Use common
outgoing-CPU-notification code". Hopefully that's easy to fix up
locally.

> BTW, can we skip patch 11 in this series and still allow
> drivers/firmware/psci.c only for arm64, with the aim of moving the arm32
> code later?

We could, though I would prefer to have the two unified from the
beginning.

Thanks,
Mark.

[1] git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/psci-rework
[2] git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git psci/rework