linux-kernel - [PATCH v4 6/8] ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementations

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Message-ID: <20230317195027.3746949-7-zalbassam@google.com>
Date:   Fri, 17 Mar 2023 15:50:25 -0400
From:   Zaid Al-Bassam <zalbassam@...gle.com>
To:     Jesus Sanchez-Palencia <jesussanp@...gle.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Zenghui Yu <yuzenghui@...wei.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, kvmarm@...ts.linux.dev,
        kvmarm@...ts.cs.columbia.edu, f.fainelli@...il.com
Cc:     Marc Zyngier <marc.zyngier@....com>,
        Zaid Al-Bassam <zalbassam@...gle.com>
Subject: [PATCH v4 6/8] ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementations

From: Marc Zyngier <marc.zyngier@....com>

ARMv8 is a superset of ARMv7, and all the ARMv8 features are
discoverable with a set of ID registers. It means that we can
use CPU_V7 to guard ARMv8 features at compile time.

This commit simply amends the CPU_V7 configuration symbol comment
to reflect that CPU_V7 also covers ARMv8.

Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Zaid Al-Bassam <zalbassam@...gle.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
---
 arch/arm/mm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 8e2d75624f5c..dda78a69efba 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -403,7 +403,7 @@ config CPU_V6K
 	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V6 if MMU
 
-# ARMv7
+# ARMv7 and ARMv8 architectures
 config CPU_V7
 	bool
 	select CPU_32v6K
-- 
2.40.0.rc2.332.ga46443480c-goog