On Mon, Aug 17, 2020 at 6:17 PM Wei Hu (Xavier)
<huwei...@chinasoftinc.com> wrote:
>
> From: "Wei Hu (Xavier)" <xavier.hu...@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>
Change the git commit like
eal/arm64: update CPU flags
> ---
> v1 -> v2:
> Adds more sve-related definition to rte_cpu_feature_table,
> sunch as SVE2, etc.
> ---
> lib/librte_eal/arm/include/rte_cpuflags_64.h | 1 +
> lib/librte_eal/arm/rte_cpuflags.c | 11 +++++++++++
> 2 files changed, 12 insertions(+)
>
> diff --git a/lib/librte_eal/arm/include/rte_cpuflags_64.h
> b/lib/librte_eal/arm/include/rte_cpuflags_64.h
> index 95cc01474..069844ddb 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,
Please intrdouce the flag for all newly added items as well.
> 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 caf3dc83a..97a9fcfd4 100644
> --- a/lib/librte_eal/arm/rte_cpuflags.c
> +++ b/lib/librte_eal/arm/rte_cpuflags.c
> @@ -95,6 +95,17 @@ 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(SVE2, REG_HWCAP2, 1)
> + FEAT_DEF(SVEAES, REG_HWCAP2, 2)
> + FEAT_DEF(SVEPMULL, REG_HWCAP2, 3)
> + FEAT_DEF(SVEBITPERM, REG_HWCAP2, 4)
> + FEAT_DEF(SVESHA3, REG_HWCAP2, 5)
> + FEAT_DEF(SVESM4, REG_HWCAP2, 6)
Following stuff is missing
HWCAP2_FLAGM2 (1 << 7)
HWCAP2_FRINT (1 << 8)
> + FEAT_DEF(SVEI8MM, REG_HWCAP2, 9)
> + FEAT_DEF(SVEF32MM, REG_HWCAP2, 10)
> + FEAT_DEF(SVEF64MM, REG_HWCAP2, 11)
> + FEAT_DEF(SVEBF16, REG_HWCAP2, 12)
> FEAT_DEF(AARCH64, REG_PLATFORM, 1)
> };
> #endif /* RTE_ARCH */
> --
> 2.27.0
>
