On Fri, Jul 08, 2016 at 04:01:13PM +0100, Suzuki K. Poulose wrote: > From: Steve Capper <steve.cap...@linaro.org> > > It can be useful for JIT software to be aware of MIDR_EL1 and > REVIDR_EL1 to ascertain the presence of any core errata that could > affect code generation. > > This patch exposes these registers through sysfs: > > /sys/devices/system/cpu/cpu$ID/regs/identification/midr_el1 > /sys/devices/system/cpu/cpu$ID/regs/identification/revidr_el1 > > where $ID is the cpu number. For big.LITTLE systems, one can have a > mixture of cores (e.g. Cortex A53 and Cortex A57), thus all CPUs need > to be enumerated. > > If the kernel does not have valid information to populate these entries > with, an empty string is returned to userspace. > > Cc: Catalin Marinas <catalin.mari...@arm.com> > Cc: Will Deacon <will.dea...@arm.com> > Cc: Mark Rutland <mark.rutl...@arm.com> > Signed-off-by: Steve Capper <steve.cap...@linaro.org> > [ ABI documentation updates, hotplug notifiers, kobject changes ] > Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com>
Applied. Thanks. -- Catalin
