[dpdk-dev] [PATCH] lib/librte_eal: support SVE flag on ARM64

[Wei Hu (Xavier)]

From: Chengwen Feng <fengchengwen at 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 <fengchengwen at huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei at 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