On Fri, Jan 31, 2025 at 10:32:55AM -0600, Segher Boessenkool wrote:
> On Wed, Jan 29, 2025 at 04:06:03PM +1000, Nicholas Piggin wrote:
> > Does wait cause MSR[EE] to be set? If not, do you need to use
> > prep_irq_for_idle_irqsoff() here maybe?
>
> Assuming this does implement the standard ISA 2.0
On Wed, Jan 29, 2025 at 04:06:03PM +1000, Nicholas Piggin wrote:
> Does wait cause MSR[EE] to be set? If not, do you need to use
> prep_irq_for_idle_irqsoff() here maybe?
Assuming this does implement the standard ISA 2.03 wait instruction
(and it better), this does not do anything other than to st
Hi!
> +static void microwatt_idle(void)
> +{
> + if (!prep_irq_for_idle())
> + return;
> +
> + __asm__ __volatile__ ("wait");
> +}
All asm without outputs is always implicitly volatile (if it wasn't, it
could always be transfirmed whatever way you want, like, optimised away
co
On Wed, Jan 29, 2025 at 04:06:03PM +1000, Nicholas Piggin wrote:
> On Wed Jan 29, 2025 at 8:52 AM AEST, Paul Mackerras wrote:
> > This uses the 'wait' instruction to pause instruction execution when
> > idle until an interrupt occurs.
> >
> > Signed-off-by: Paul Mackerras
> > ---
> > arch/powerpc
On Wed Jan 29, 2025 at 8:52 AM AEST, Paul Mackerras wrote:
> This uses the 'wait' instruction to pause instruction execution when
> idle until an interrupt occurs.
>
> Signed-off-by: Paul Mackerras
> ---
> arch/powerpc/platforms/microwatt/setup.c | 9 +
> 1 file changed, 9 insertions(+)
>
This uses the 'wait' instruction to pause instruction execution when
idle until an interrupt occurs.
Signed-off-by: Paul Mackerras
---
arch/powerpc/platforms/microwatt/setup.c | 9 +
1 file changed, 9 insertions(+)
diff --git a/arch/powerpc/platforms/microwatt/setup.c
b/arch/powerpc/pl
