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From: Dave Martin <Dave.Martin@arm.com>
To: Andrew Murray <andrew.murray@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Mark Rutland <mark.rutland@arm.com>, Phil Blundell <pb@pbcl.net>,
	libc-alpha@sourceware.org, linux-api@vger.kernel.org,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: Re: [PATCH v4 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Wed, 3 Apr 2019 14:21:54 +0100	[thread overview]
Message-ID: <20190403132154.GU3567@e103592.cambridge.arm.com> (raw)
In-Reply-To: <20190403105628.39798-7-andrew.murray@arm.com>

On Wed, Apr 03, 2019 at 11:56:28AM +0100, Andrew Murray wrote:
> Advertise ARM64_HAS_DCPODP when both DC CVAP and DC CVADP are supported.
> 
> Even though we don't use this feature now, we provide it for consistency
> with DCPOP and anticipate it being used in the future.
> 
> Signed-off-by: Andrew Murray <andrew.murray@arm.com>

Reviewed-by: Dave Martin <Dave.Martin@arm.com>

> ---
>  arch/arm64/include/asm/cpucaps.h | 3 ++-
>  arch/arm64/kernel/cpufeature.c   | 9 +++++++++
>  2 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
> index f6a76e43f39e..defdc67d9ab4 100644
> --- a/arch/arm64/include/asm/cpucaps.h
> +++ b/arch/arm64/include/asm/cpucaps.h
> @@ -61,7 +61,8 @@
>  #define ARM64_HAS_GENERIC_AUTH_ARCH		40
>  #define ARM64_HAS_GENERIC_AUTH_IMP_DEF		41
>  #define ARM64_HAS_IRQ_PRIO_MASKING		42
> +#define ARM64_HAS_DCPODP			43
>  
> -#define ARM64_NCAPS				43
> +#define ARM64_NCAPS				44
>  
>  #endif /* __ASM_CPUCAPS_H */
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index f8b682a3a9f4..4ee5d63281ae 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -1340,6 +1340,15 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
>  		.field_pos = ID_AA64ISAR1_DPB_SHIFT,
>  		.min_field_value = 1,
>  	},
> +	{
> +		.desc = "Data cache clean to Point of Deep Persistence",
> +		.capability = ARM64_HAS_DCPODP,
> +		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
> +		.matches = has_cpuid_feature,
> +		.sys_reg = SYS_ID_AA64ISAR1_EL1,
> +		.field_pos = ID_AA64ISAR1_DPB_SHIFT,
> +		.min_field_value = 2,
> +	},
>  #endif
>  #ifdef CONFIG_ARM64_SVE
>  	{
> -- 
> 2.21.0
> 

WARNING: multiple messages have this Message-ID (diff)
From: Dave Martin <Dave.Martin@arm.com>
To: Andrew Murray <andrew.murray@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	libc-alpha@sourceware.org,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>, Phil Blundell <pb@pbcl.net>,
	linux-api@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Wed, 3 Apr 2019 14:21:54 +0100	[thread overview]
Message-ID: <20190403132154.GU3567@e103592.cambridge.arm.com> (raw)
In-Reply-To: <20190403105628.39798-7-andrew.murray@arm.com>

On Wed, Apr 03, 2019 at 11:56:28AM +0100, Andrew Murray wrote:
> Advertise ARM64_HAS_DCPODP when both DC CVAP and DC CVADP are supported.
> 
> Even though we don't use this feature now, we provide it for consistency
> with DCPOP and anticipate it being used in the future.
> 
> Signed-off-by: Andrew Murray <andrew.murray@arm.com>

Reviewed-by: Dave Martin <Dave.Martin@arm.com>

> ---
>  arch/arm64/include/asm/cpucaps.h | 3 ++-
>  arch/arm64/kernel/cpufeature.c   | 9 +++++++++
>  2 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
> index f6a76e43f39e..defdc67d9ab4 100644
> --- a/arch/arm64/include/asm/cpucaps.h
> +++ b/arch/arm64/include/asm/cpucaps.h
> @@ -61,7 +61,8 @@
>  #define ARM64_HAS_GENERIC_AUTH_ARCH		40
>  #define ARM64_HAS_GENERIC_AUTH_IMP_DEF		41
>  #define ARM64_HAS_IRQ_PRIO_MASKING		42
> +#define ARM64_HAS_DCPODP			43
>  
> -#define ARM64_NCAPS				43
> +#define ARM64_NCAPS				44
>  
>  #endif /* __ASM_CPUCAPS_H */
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index f8b682a3a9f4..4ee5d63281ae 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -1340,6 +1340,15 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
>  		.field_pos = ID_AA64ISAR1_DPB_SHIFT,
>  		.min_field_value = 1,
>  	},
> +	{
> +		.desc = "Data cache clean to Point of Deep Persistence",
> +		.capability = ARM64_HAS_DCPODP,
> +		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
> +		.matches = has_cpuid_feature,
> +		.sys_reg = SYS_ID_AA64ISAR1_EL1,
> +		.field_pos = ID_AA64ISAR1_DPB_SHIFT,
> +		.min_field_value = 2,
> +	},
>  #endif
>  #ifdef CONFIG_ARM64_SVE
>  	{
> -- 
> 2.21.0
> 

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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2019-04-03 13:21 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-03 10:56 [PATCH v4 0/6] arm64: Initial support for CVADP Andrew Murray
2019-04-03 10:56 ` Andrew Murray
2019-04-03 10:56 ` [PATCH v4 1/6] arm64: HWCAP: add support for AT_HWCAP2 Andrew Murray
2019-04-03 10:56   ` Andrew Murray
2019-04-03 13:21   ` Dave Martin
2019-04-03 13:21     ` Dave Martin
2019-04-03 16:06     ` Andrew Murray
2019-04-03 16:06       ` Andrew Murray
2019-04-03 16:33       ` Dave Martin
2019-04-03 16:33         ` Dave Martin
2019-04-04 11:25         ` Andrew Murray
2019-04-04 11:25           ` Andrew Murray
2019-04-04 12:47           ` Dave Martin
2019-04-04 12:47             ` Dave Martin
2019-04-03 10:56 ` [PATCH v4 2/6] arm64: HWCAP: encapsulate elf_hwcap Andrew Murray
2019-04-03 10:56   ` Andrew Murray
2019-04-03 13:21   ` Dave Martin
2019-04-03 13:21     ` Dave Martin
2019-04-03 13:42   ` Suzuki K Poulose
2019-04-03 13:42     ` Suzuki K Poulose
2019-04-03 10:56 ` [PATCH v4 3/6] arm64: Handle trapped DC CVADP Andrew Murray
2019-04-03 10:56   ` Andrew Murray
2019-04-03 13:21   ` Dave Martin
2019-04-03 13:21     ` Dave Martin
2019-04-03 10:56 ` [PATCH v4 4/6] arm64: Expose DC CVADP to userspace Andrew Murray
2019-04-03 10:56   ` Andrew Murray
2019-04-03 13:21   ` Dave Martin
2019-04-03 13:21     ` Dave Martin
2019-04-03 10:56 ` [PATCH v4 5/6] arm64: add CVADP support to the cache maintenance helper Andrew Murray
2019-04-03 10:56   ` Andrew Murray
2019-04-03 13:21   ` Dave Martin
2019-04-03 13:21     ` Dave Martin
2019-04-03 10:56 ` [PATCH v4 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature Andrew Murray
2019-04-03 10:56   ` Andrew Murray
2019-04-03 13:21   ` Dave Martin [this message]
2019-04-03 13:21     ` Dave Martin
2019-04-03 13:48   ` Suzuki K Poulose
2019-04-03 13:48     ` Suzuki K Poulose

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