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From: Jianbo Liu <jianbo.liu@linaro.org>
Date: Tue, 3 Jan 2017 15:48:32 +0800
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To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Cc: dev@dpdk.org, "Ananyev, Konstantin" <konstantin.ananyev@intel.com>, 
 Thomas Monjalon <thomas.monjalon@6wind.com>,
 Bruce Richardson <bruce.richardson@intel.com>, 
 Jan Viktorin <viktorin@rehivetech.com>, 
 Santosh Shukla <santosh.shukla@caviumnetworks.com>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [dpdk-dev] [PATCH v2 09/29] eal/arm64: define I/O device memory
 barriers for arm64
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On 27 December 2016 at 17:49, Jerin Jacob
<jerin.jacob@caviumnetworks.com> wrote:
> CC: Jianbo Liu <jianbo.liu@linaro.org>
> Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> ---
>  lib/librte_eal/common/include/arch/arm/rte_atomic_64.h | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/lib/librte_eal/common/include/arch/arm/rte_atomic_64.h b/lib/librte_eal/common/include/arch/arm/rte_atomic_64.h
> index 78ebea2..ef0efc7 100644
> --- a/lib/librte_eal/common/include/arch/arm/rte_atomic_64.h
> +++ b/lib/librte_eal/common/include/arch/arm/rte_atomic_64.h
> @@ -88,6 +88,12 @@ static inline void rte_rmb(void)
>
>  #define rte_smp_rmb() dmb(ishld)
>
> +#define rte_io_mb() rte_mb()
> +
> +#define rte_io_wmb() rte_wmb()
> +
> +#define rte_io_rmb() rte_rmb()
> +

I think it's better to use outer shareable dmb for io barrier, instead of dsb.