[dpdk-dev] [PATCH v2 07/29] eal/arm64: fix memory barrier definition for arm64

[Jianbo Liu]

On 27 December 2016 at 17:49, Jerin Jacob
<jerin.jacob at caviumnetworks.com> wrote:
> dsb instruction based barrier is used for non smp
> version of memory barrier.
>
> Fixes: d708f01b7102 ("eal/arm: add atomic operations for ARMv8")
>
> CC: Jianbo Liu <jianbo.liu at linaro.org>
> CC: stable at dpdk.org
> Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
> ---
>  lib/librte_eal/common/include/arch/arm/rte_atomic_64.h | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> 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 d854aac..bc7de64 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
> @@ -43,7 +43,8 @@ extern "C" {
>
>  #include "generic/rte_atomic.h"
>
> -#define dmb(opt)  do { asm volatile("dmb " #opt : : : "memory"); } while (0)
> +#define dsb(opt)  { asm volatile("dsb " #opt : : : "memory"); }
> +#define dmb(opt)  { asm volatile("dmb " #opt : : : "memory"); }
>
>  /**
>   * General memory barrier.
> @@ -54,7 +55,7 @@ extern "C" {
>   */
>  static inline void rte_mb(void)
>  {
> -       dmb(ish);
> +       dsb(sy);
>  }
>
>  /**
> @@ -66,7 +67,7 @@ static inline void rte_mb(void)
>   */
>  static inline void rte_wmb(void)
>  {
> -       dmb(ishst);
> +       dsb(st);
>  }
>
>  /**
> @@ -78,7 +79,7 @@ static inline void rte_wmb(void)
>   */
>  static inline void rte_rmb(void)
>  {
> -       dmb(ishld);
> +       dsb(ld);
>  }
>
>  #define rte_smp_mb() rte_mb()
> --
> 2.5.5
>

Acked-by: Jianbo Liu <jianbo.liu at linaro.org>