[PATCH v4.4 V2 17/43] arm64: errata: Calling enable functions for CPU errata too

From: Viresh Kumar <viresh.kumar@linaro.org>
To: stable@vger.kernel.org, Julien Thierry <Julien.Thierry@arm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
	linux-arm-kernel@lists.infradead.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Russell King <rmk+kernel@arm.linux.org.uk>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	mark.brown@arm.com
Subject: [PATCH v4.4 V2 17/43] arm64: errata: Calling enable functions for CPU errata too
Date: Fri, 12 Jul 2019 10:58:05 +0530	[thread overview]
Message-ID: <1916064968526bf98d502a4f286c951db52eef80.1562908075.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1562908074.git.viresh.kumar@linaro.org>

From: Andre Przywara <andre.przywara@arm.com>

commit 8e2318521bf5837dae093413f81292b59d49d030 upstream.

Currently we call the (optional) enable function for CPU _features_
only. As CPU _errata_ descriptions share the same data structure and
having an enable function is useful for errata as well (for instance
to set bits in SCTLR), lets call it when enumerating erratas too.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 arch/arm64/include/asm/cpufeature.h | 2 ++
 arch/arm64/kernel/cpu_errata.c      | 5 +++++
 arch/arm64/kernel/cpufeature.c      | 3 ++-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index dd1aab8e52aa..0267bab6ac18 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -171,7 +171,9 @@ void __init setup_cpu_features(void);
 
 void update_cpu_capabilities(const struct arm64_cpu_capabilities *caps,
 			    const char *info);
+void enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps);
 void check_local_cpu_errata(void);
+void __init enable_errata_workarounds(void);
 
 void verify_local_cpu_errata(void);
 
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index a3567881c01b..d9f095439011 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -140,3 +140,8 @@ void check_local_cpu_errata(void)
 {
 	update_cpu_capabilities(arm64_errata, "enabling workaround for");
 }
+
+void __init enable_errata_workarounds(void)
+{
+	enable_cpu_capabilities(arm64_errata);
+}
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 9a4b638b1c18..7773bea6927e 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -820,7 +820,7 @@ void update_cpu_capabilities(const struct arm64_cpu_capabilities *caps,
  * Run through the enabled capabilities and enable() it on all active
  * CPUs
  */
-static void enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps)
+void enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps)
 {
 	int i;
 
@@ -923,6 +923,7 @@ void __init setup_cpu_features(void)
 
 	/* Set the CPU feature capabilies */
 	setup_feature_capabilities();
+	enable_errata_workarounds();
 	setup_cpu_hwcaps();
 
 	/* Advertise that we have computed the system capabilities */
-- 
2.21.0.rc0.269.g1a574e7a288b

