Module Name: src
Committed By: jmcneill
Date: Sun Feb 7 21:24:50 UTC 2021
Modified Files:
src/sys/arch/arm/cortex: gicv3.c
Log Message:
Optimize hardware priority updates.
In gicv3_set_priority, read the current priority mask and only update it
if we are lowering the priority. The hardware priority filter is raised
only after taking an interrupt. This makes splfoo/splx without an interrupt
in between considerably cheaper as PMR writes are relatively expensive
compared to reads.
While here, avoid an extra daif read when dispatching interrupts by using
ENABLE_INTERRUPT() / DISABLE_INTERRUPT() instead of cpsie() / cpsid() macros.
To generate a diff of this commit:
cvs rdiff -u -r1.39 -r1.40 src/sys/arch/arm/cortex/gicv3.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
