On Tue, Nov 08, 2016 at 01:56:20PM +0000, Suzuki K Poulose wrote: > The hypervisor may not have full access to the kernel data structures > and hence cannot safely use cpus_have_cap() helper for checking the > system capability. Add a safe helper for hypervisors to check a constant > system capability, which *doesn't* fall back to checking the bitmap > maintained by the kernel. With this, make the cpus_have_cap() only > check the bitmask and force constant cap checks to use the new API > for quicker checks. > > Cc: Robert Ritcher <rritcher@xxxxxxxxxx> > Cc: Tirumalesh Chalamarla <tchalamarla@xxxxxxxxxx> > Cc: Marc Zyngier <marc.zyngier@xxxxxxx> > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> > Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx> > --- > arch/arm64/include/asm/cpufeature.h | 19 ++++++++++++------- > arch/arm64/kernel/cpufeature.c | 2 +- > arch/arm64/kernel/process.c | 2 +- > drivers/irqchip/irq-gic-v3.c | 13 +------------ It might be worth having the GIC changes as a separate patch, but either way: Reviewed-by: Will Deacon <will.deacon@xxxxxxx> Will _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
