On 25/05/18 11:04, Suzuki K Poulose wrote:
On 25/05/18 10:49, Julien Thierry wrote:
Add a cpufeature indicating whether a cpu supports masking interrupts
by priority.
How is this different from the SYSREG_GIC_CPUIF cap ? Is it just
the description ?
More or less.
It is just to have an easier condition in the rest of the series.
Basically the PRIO masking feature is enabled if we have a GICv3 CPUIF
working *and* the option was selected at build time. Before this meant
that I was checking for the GIC_CPUIF cap inside #ifdefs (and putting
alternatives depending on that inside #ifdefs as well).
Having this as a separate feature feels easier to manage in the code. It
also makes it clearer at boot time that the kernel will be using irq
priorities (although I admit it was not the initial intention):
[ 0.000000] CPU features: detected: IRQ priority masking
But yes that new feature will be detected only if SYSREG_GIC_CPUIF gets
detected as well.
Cheers,
--
Julien Thierry
