On Mon, 25 Jul 2016 20:22:21 +0530 Madhavan Srinivasan <ma...@linux.vnet.ibm.com> wrote:
> Code to replay the Performance Monitoring Interrupts(PMI). > In the masked_interrupt handler, for PMIs we reset the MSR[EE] > and return. This is due the fact that PMIs are level triggered. > In the __check_irq_replay(), we enabled the MSR[EE] which will > fire the interrupt for us. > > Patch also adds a new arch_local_irq_disable_var() variant. New > variant takes an input value to write to the paca->soft_enabled. > This will be used in following patch to implement the tri-state > value for soft-enabled. Same comment also applies about patches being standalone transformations that work before and after. Some of these can be squashed together I think. > Signed-off-by: Madhavan Srinivasan <ma...@linux.vnet.ibm.com> > --- > arch/powerpc/include/asm/hw_irq.h | 14 ++++++++++++++ > arch/powerpc/kernel/irq.c | 9 ++++++++- > 2 files changed, 22 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/include/asm/hw_irq.h > b/arch/powerpc/include/asm/hw_irq.h index cc69dde6eb84..863179654452 > 100644 --- a/arch/powerpc/include/asm/hw_irq.h > +++ b/arch/powerpc/include/asm/hw_irq.h > @@ -81,6 +81,20 @@ static inline unsigned long > arch_local_irq_disable(void) return flags; > } > > +static inline unsigned long arch_local_irq_disable_var(int value) > +{ > + unsigned long flags, zero; > + > + asm volatile( > + "li %1,%3; lbz %0,%2(13); stb %1,%2(13)" > + : "=r" (flags), "=&r" (zero) > + : "i" (offsetof(struct paca_struct, soft_enabled)),\ > + "i" (value) > + : "memory"); > + > + return flags; > +} arch_ function suggests it is arch implementation of a generic kernel function or something. I think our soft interrupt levels are just used in powerpc specific code. The name could also be a little more descriptive. I would have our internal function be something like soft_irq_set_level(), and then the arch disable just sets to the appropriate level as it does today. The PMU disable level could be implemented in powerpc specific header with local_irq_and_pmu_disable() or something like that. Thanks, Nick _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev