Re: [Minios-devel] [UNIKRAFT PATCHv5 40/46] plat/common: Implement CPU reset for arm64

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

On 11.09.2018 22:20, Simon Kuenzer wrote:
> On 10.08.2018 09:08, Wei Chen wrote:
> > From: Wei Chen <Wei.Chen@xxxxxxx>
> >
> > Using PSCI despatch function to call PSCI_CPU_RESET
> > function to reset CPU.
> >
> > Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
> > ---
> >   plat/common/arm/cpu_native.c        | 7 +++++++
> >   plat/common/include/arm/arm64/cpu.h | 1 +
> >   2 files changed, 8 insertions(+)
> >
> > diff --git a/plat/common/arm/cpu_native.c b/plat/common/arm/cpu_native.c
> > index 2d1a1aa..429b172 100644
> > --- a/plat/common/arm/cpu_native.c
> > +++ b/plat/common/arm/cpu_native.c
> > @@ -43,3 +43,10 @@ void halt(void)
> >   {
> >       __asm__ __volatile__("wfi");
> >   }
> > +
> > +/* Systems support PSCI >= 0.2 can do system reset from PSCI */
> > +void reset(void)
> > +{
> > +    UK_BUGON (!smcc_psci_call);
> Maybe we should have failed earlier during boot when we failed to detect 
> the mode. Then you could use UK_ASSERT() instead. What do you think?
Alternatively we could enter a busy loop if we fail to get the mode 
(same for shutdown in the next patch).
> > +    smcc_psci_call(PSCI_FNID_SYSTEM_RESET, 0, 0, 0);
> > +}
> > diff --git a/plat/common/include/arm/arm64/cpu.h 
> > b/plat/common/include/arm/arm64/cpu.h
> > index b231d32..c156fd3 100644
> > --- a/plat/common/include/arm/arm64/cpu.h
> > +++ b/plat/common/include/arm/arm64/cpu.h
> > @@ -102,3 +102,4 @@ int32_t smcc_psci_smc_call(uint32_t, uint64_t, 
> > uint64_t, uint64_t);
> >   /* CPU native APIs */
> >   void halt(void);
> > +void reset(void);
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