Re: [PATCH] arm64: Add part number for Arm Cortex-A78
From: Will Deacon <will@kernel.org>
Date: 2021-02-19 17:53:21
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On Wed, Feb 17, 2021 at 11:37:04PM +0530, Neeraj Upadhyay wrote:
On 2/17/2021 10:36 PM, Will Deacon wrote:quoted
On Wed, Feb 17, 2021 at 10:14:11PM +0530, Neeraj Upadhyay wrote:quoted
Add the MIDR part number info for the Arm Cortex-A78. Signed-off-by: Neeraj Upadhyay <redacted> --- arch/arm64/include/asm/cputype.h | 2 ++ 1 file changed, 2 insertions(+)diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index ef5b040..3aced88 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h@@ -72,6 +72,7 @@ #define ARM_CPU_PART_CORTEX_A76 0xD0B #define ARM_CPU_PART_NEOVERSE_N1 0xD0C #define ARM_CPU_PART_CORTEX_A77 0xD0D +#define ARM_CPU_PART_CORTEX_A78 0xD41 #define APM_CPU_PART_POTENZA 0x000@@ -109,6 +110,7 @@ #define MIDR_CORTEX_A76 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A76) #define MIDR_NEOVERSE_N1 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_N1) #define MIDR_CORTEX_A77 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A77) +#define MIDR_CORTEX_A78 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A78) #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) #define MIDR_THUNDERX_83XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_83XX)This usually means there's an erratum to work around. What are you hiding ;) Will:) . This is needed for supporting implementation defined AMU counters in A78 [1]. However, there is no upstream user of it.
I don't think we should add this upstream without a user. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel