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From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: will@kernel.org, catalin.marinas@arm.com,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	stable@vger.kernel.org, James Morse <james.morse@arm.com>,
	Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH] arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55
Date: Wed,  3 Feb 2021 23:00:57 +0000	[thread overview]
Message-ID: <20210203230057.3961239-1-suzuki.poulose@arm.com> (raw)

The erratum 1024718 affects Cortex-A55 r0p0 to r2p0. However
we apply the work around for r0p0 - r1p0. Unfortunately this
won't be fixed for the future revisions for the CPU. Thus
extend the work around for all versions of A55, to cover
for r2p0 and any future revisions.

Cc: stable@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 arch/arm64/kernel/cpufeature.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index e99eddec0a46..db400ca77427 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1455,7 +1455,7 @@ static bool cpu_has_broken_dbm(void)
 	/* List of CPUs which have broken DBM support. */
 	static const struct midr_range cpus[] = {
 #ifdef CONFIG_ARM64_ERRATUM_1024718
-		MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 1, 0),  // A55 r0p0 -r1p0
+		MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
 		/* Kryo4xx Silver (rdpe => r1p0) */
 		MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
 #endif
-- 
2.24.1


WARNING: multiple messages have this Message-ID (diff)
From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	catalin.marinas@arm.com, stable@vger.kernel.org,
	James Morse <james.morse@arm.com>,
	will@kernel.org
Subject: [PATCH] arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55
Date: Wed,  3 Feb 2021 23:00:57 +0000	[thread overview]
Message-ID: <20210203230057.3961239-1-suzuki.poulose@arm.com> (raw)

The erratum 1024718 affects Cortex-A55 r0p0 to r2p0. However
we apply the work around for r0p0 - r1p0. Unfortunately this
won't be fixed for the future revisions for the CPU. Thus
extend the work around for all versions of A55, to cover
for r2p0 and any future revisions.

Cc: stable@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 arch/arm64/kernel/cpufeature.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index e99eddec0a46..db400ca77427 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1455,7 +1455,7 @@ static bool cpu_has_broken_dbm(void)
 	/* List of CPUs which have broken DBM support. */
 	static const struct midr_range cpus[] = {
 #ifdef CONFIG_ARM64_ERRATUM_1024718
-		MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 1, 0),  // A55 r0p0 -r1p0
+		MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
 		/* Kryo4xx Silver (rdpe => r1p0) */
 		MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
 #endif
-- 
2.24.1


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             reply	other threads:[~2021-02-03 23:04 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03 23:00 Suzuki K Poulose [this message]
2021-02-03 23:00 ` [PATCH] arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55 Suzuki K Poulose
2021-02-04  9:54 ` Will Deacon
2021-02-04  9:54   ` Will Deacon
2021-02-05 17:41   ` Suzuki K Poulose
2021-02-05 17:41     ` Suzuki K Poulose
2021-02-08 12:29     ` Will Deacon
2021-02-08 12:29       ` Will Deacon
2021-02-08 14:55 ` Will Deacon
2021-02-08 14:55   ` Will Deacon
2021-03-01 12:15 FAILED: patch "[PATCH] arm64: Extend workaround for erratum 1024718 to all versions" failed to apply to 5.4-stable tree gregkh
2021-03-01 12:54 ` [PATCH] arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55 Suzuki K Poulose

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