armv8.1 adds support for new atomic instructions.
Linux kernel v4.3 onwards, the presence of atomic instruction
support can detect through HWCAP_ATOMICS
Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
---
app/test/test_cpuflags.c | 3 +++
lib/librte_eal/common/arch/arm/rte_cpuflags.c | 1 +
lib/librte_eal/common/include/arch/arm/rte_cpuflags_64.h | 1 +
3 files changed, 5 insertions(+)
diff --git a/app/test/test_cpuflags.c b/app/test/test_cpuflags.c
index e8d0ce7..d083c86 100644
--- a/app/test/test_cpuflags.c
+++ b/app/test/test_cpuflags.c
@@ -144,6 +144,9 @@ test_cpuflags(void)
printf("Check for CRC32:\t");
CHECK_FOR_FLAG(RTE_CPUFLAG_CRC32);
+
+ printf("Check for ATOMICS:\t");
+ CHECK_FOR_FLAG(RTE_CPUFLAG_ATOMICS);
#endif
#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
diff --git a/lib/librte_eal/common/arch/arm/rte_cpuflags.c
b/lib/librte_eal/common/arch/arm/rte_cpuflags.c
index f14c56a..23240ef 100644
--- a/lib/librte_eal/common/arch/arm/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/arm/rte_cpuflags.c
@@ -122,6 +122,7 @@ const struct feature_entry rte_cpu_feature_table[] = {
FEAT_DEF(SHA1, REG_HWCAP, 5)
FEAT_DEF(SHA2, REG_HWCAP, 6)
FEAT_DEF(CRC32, REG_HWCAP, 7)
+ FEAT_DEF(ATOMICS, REG_HWCAP, 8)
FEAT_DEF(AARCH64, REG_PLATFORM, 1)
};
#endif /* RTE_ARCH */
diff --git a/lib/librte_eal/common/include/arch/arm/rte_cpuflags_64.h
b/lib/librte_eal/common/include/arch/arm/rte_cpuflags_64.h
index 810e8a0..49aead9 100644
--- a/lib/librte_eal/common/include/arch/arm/rte_cpuflags_64.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_cpuflags_64.h
@@ -49,6 +49,7 @@ enum rte_cpu_flag_t {
RTE_CPUFLAG_SHA1,
RTE_CPUFLAG_SHA2,
RTE_CPUFLAG_CRC32,
+ RTE_CPUFLAG_ATOMICS,
RTE_CPUFLAG_AARCH64,
/* The last item */
RTE_CPUFLAG_NUMFLAGS,/**< This should always be the last! */
--
2.1.0
