Hi,
Thanks for the patch. Has this been tested on any platform (simulator,
emulator etc)? Do you plan to add more code using SVE?
Thank you,
Honnappa
> -----Original Message-----
> From: dev <dev-boun...@dpdk.org> On Behalf Of Wei Hu (Xavier)
> Sent: Friday, July 17, 2020 7:08 AM
> To: dev@dpdk.org
> Cc: xavier.hu...@huawei.com
> Subject: [dpdk-dev] [PATCH] lib/librte_eal: support SVE flag on ARM64
>
> From: Chengwen Feng <fengcheng...@huawei.com>
>
> SVE is the next-generation SIMD extension of the ARMv8-A AArch64
> instruction set.
> The related marco definition can be found in linux kernel:
> arch/arm64/include/uapi/asm/hwcap.h
>
> This patch supports getting cpu SVE feature on ARM64 platform.
>
> Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
> Signed-off-by: Wei Hu (Xavier) <xavier.hu...@huawei.com>
> ---
> lib/librte_eal/arm/include/rte_cpuflags_64.h | 1 +
> lib/librte_eal/arm/rte_cpuflags.c | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/lib/librte_eal/arm/include/rte_cpuflags_64.h
> b/lib/librte_eal/arm/include/rte_cpuflags_64.h
> index 95cc014..069844d 100644
> --- a/lib/librte_eal/arm/include/rte_cpuflags_64.h
> +++ b/lib/librte_eal/arm/include/rte_cpuflags_64.h
> @@ -22,6 +22,7 @@ enum rte_cpu_flag_t {
> RTE_CPUFLAG_SHA2,
> RTE_CPUFLAG_CRC32,
> RTE_CPUFLAG_ATOMICS,
> + RTE_CPUFLAG_SVE,
> RTE_CPUFLAG_AARCH64,
> /* The last item */
> RTE_CPUFLAG_NUMFLAGS,/**< This should always be the last! */ diff
> --git a/lib/librte_eal/arm/rte_cpuflags.c b/lib/librte_eal/arm/rte_cpuflags.c
> index caf3dc8..b1e220b 100644
> --- a/lib/librte_eal/arm/rte_cpuflags.c
> +++ b/lib/librte_eal/arm/rte_cpuflags.c
> @@ -95,6 +95,7 @@ const struct feature_entry rte_cpu_feature_table[] = {
> FEAT_DEF(SHA2, REG_HWCAP, 6)
> FEAT_DEF(CRC32, REG_HWCAP, 7)
> FEAT_DEF(ATOMICS, REG_HWCAP, 8)
> + FEAT_DEF(SVE, REG_HWCAP, 22)
> FEAT_DEF(AARCH64, REG_PLATFORM, 1)
> };
> #endif /* RTE_ARCH */
> --
> 2.7.4
