From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Thu, 12 Jan 2017 15:33:15 +0000 Subject: [PATCH] arm64: errata: Provide macro for major and minor cpu revisions In-Reply-To: <20170111121143.9586-1-rrichter@cavium.com> References: <20170111121143.9586-1-rrichter@cavium.com> Message-ID: <20170112153315.GC13843@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Jan 11, 2017 at 01:11:42PM +0100, Robert Richter wrote: > Definition of cpu ranges are hard to read if the cpu variant is not > zero. Provide MIDR_CPU_FULL_REV() macro to describe the full hardware > revision of a cpu including variant and (minor) revision. > > Signed-off-by: Robert Richter > --- > arch/arm64/include/asm/cputype.h | 3 +++ > arch/arm64/kernel/cpu_errata.c | 15 +++++++++------ > arch/arm64/kernel/cpufeature.c | 8 +++----- > 3 files changed, 15 insertions(+), 11 deletions(-) > > diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h > index 26a68ddb11c1..983e59cbdd54 100644 > --- a/arch/arm64/include/asm/cputype.h > +++ b/arch/arm64/include/asm/cputype.h > @@ -56,6 +56,9 @@ > (0xf << MIDR_ARCHITECTURE_SHIFT) | \ > ((partnum) << MIDR_PARTNUM_SHIFT)) > > +#define MIDR_CPU_FULL_REV(var, rev) \ > + (((var) << MIDR_VARIANT_SHIFT) | (rev)) Minor nit, but could you rename this to MIDR_CPU_VAR_REV instead please? The revision field *is* the bottom 4 bits, so "full" rev doesn't really make a lot of sense. If you repost with that change, I'll pick it up for 4.11. Thanks, Will