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Date: Thu, 7 Jul 2016 10:18:17 +0530
From: Ganapatrao Kulkarni <gkulkarni@...iumnetworks.com>
To: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <Will.Deacon@....com>,
<catalin.marinas@....com>, <apinski@...ium.com>
CC: <gpkulkarni@...il.com>
Subject: [PATCH] arm64: Enable workaround for Cavium erratum 27456 on thunderx-81xx
Cavium erratum 27456 commit 104a0c02e8b1
("arm64: Add workaround for Cavium erratum 27456")
is applicable for thunderx-81xx pass1.0 SoC as well.
Adding code to enable to 81xx.
Signed-off-by: Ganapatrao Kulkarni <gkulkarni@...ium.com>
Reviewed-by: Andrew Pinski <apinski@...ium.com>
---
arch/arm64/include/asm/cputype.h | 2 ++
arch/arm64/kernel/cpu_errata.c | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index 87e1985..9d9fd4b 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -80,12 +80,14 @@
#define APM_CPU_PART_POTENZA 0x000
#define CAVIUM_CPU_PART_THUNDERX 0x0A1
+#define CAVIUM_CPU_PART_THUNDERX_81XX 0x0A2
#define BRCM_CPU_PART_VULCAN 0x516
#define MIDR_CORTEX_A53 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
#define MIDR_CORTEX_A57 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
#define MIDR_THUNDERX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX)
+#define MIDR_THUNDERX_81XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_81XX)
#ifndef __ASSEMBLY__
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index d427894..af716b6 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -98,6 +98,12 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
MIDR_RANGE(MIDR_THUNDERX, 0x00,
(1 << MIDR_VARIANT_SHIFT) | 1),
},
+ {
+ /* Cavium ThunderX, T81 pass 1.0 */
+ .desc = "Cavium erratum 27456",
+ .capability = ARM64_WORKAROUND_CAVIUM_27456,
+ MIDR_RANGE(MIDR_THUNDERX_81XX, 0x00, 0x00),
+ },
#endif
{
}
--
1.8.1.4
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