[dpdk-dev] [PATCH v1 1/5] eal: get CPU flag name

[Thomas Monjalon <thomas.monjalon@6wind.com>]

The new function rte_cpu_get_flag_name() is added to the EAL API.
It is implemented (duplicated) in each arch because the next patch
will remove the public exposure of the feature tables.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
---
 lib/librte_eal/bsdapp/eal/rte_eal_version.map        |  1 +
 lib/librte_eal/common/arch/arm/rte_cpuflags.c        |  7 +++++++
 lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c     |  8 ++++++++
 lib/librte_eal/common/arch/x86/rte_cpuflags.c        |  8 ++++++++
 lib/librte_eal/common/eal_common_cpuflags.c          |  2 +-
 lib/librte_eal/common/include/generic/rte_cpuflags.h | 14 ++++++++++++--
 lib/librte_eal/linuxapp/eal/rte_eal_version.map      |  2 ++
 7 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index 6fa9c67..1280cb2 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -140,5 +140,6 @@ DPDK_2.3 {
 	global:
 
 	rte_cpu_feature_table;
+	rte_cpu_get_flag_name;
 
 } DPDK_2.2;
diff --git a/lib/librte_eal/common/arch/arm/rte_cpuflags.c b/lib/librte_eal/common/arch/arm/rte_cpuflags.c
index 4348574..62e0791 100644
--- a/lib/librte_eal/common/arch/arm/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/arm/rte_cpuflags.c
@@ -77,3 +77,10 @@ const struct feature_entry rte_cpu_feature_table[] = {
 };
 #endif
 
+const char *
+rte_cpu_get_flag_name(enum rte_cpu_flag_t feature)
+{
+	if (feature >= RTE_CPUFLAG_NUMFLAGS)
+		return NULL;
+	return rte_cpu_feature_table[feature].name;
+}
diff --git a/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c b/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c
index 7f4e6dd..a270ccc 100644
--- a/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c
@@ -68,3 +68,11 @@ const struct feature_entry rte_cpu_feature_table[] = {
 	FEAT_DEF(HTM, 0x00000001, 0, REG_HWCAP2,  30)
 	FEAT_DEF(ARCH_2_07, 0x00000001, 0, REG_HWCAP2,  31)
 };
+
+const char *
+rte_cpu_get_flag_name(enum rte_cpu_flag_t feature)
+{
+	if (feature >= RTE_CPUFLAG_NUMFLAGS)
+		return NULL;
+	return rte_cpu_feature_table[feature].name;
+}
diff --git a/lib/librte_eal/common/arch/x86/rte_cpuflags.c b/lib/librte_eal/common/arch/x86/rte_cpuflags.c
index 22dc572..3346fde 100644
--- a/lib/librte_eal/common/arch/x86/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/x86/rte_cpuflags.c
@@ -127,3 +127,11 @@ const struct feature_entry rte_cpu_feature_table[] = {
 
 	FEAT_DEF(INVTSC, 0x80000007, 0, RTE_REG_EDX,  8)
 };
+
+const char *
+rte_cpu_get_flag_name(enum rte_cpu_flag_t feature)
+{
+	if (feature >= RTE_CPUFLAG_NUMFLAGS)
+		return NULL;
+	return rte_cpu_feature_table[feature].name;
+}
diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c
index 9ba9b1e..8c0576d 100644
--- a/lib/librte_eal/common/eal_common_cpuflags.c
+++ b/lib/librte_eal/common/eal_common_cpuflags.c
@@ -79,7 +79,7 @@ rte_cpu_check_supported(void)
 			fprintf(stderr,
 			        "ERROR: This system does not support \"%s\".\n"
 			        "Please check that RTE_MACHINE is set correctly.\n",
-			        rte_cpu_feature_table[compile_time_flags[i]].name);
+			        rte_cpu_get_flag_name(compile_time_flags[i]));
 			exit(1);
 		}
 	}
diff --git a/lib/librte_eal/common/include/generic/rte_cpuflags.h b/lib/librte_eal/common/include/generic/rte_cpuflags.h
index 5738a2a..3ca2e36 100644
--- a/lib/librte_eal/common/include/generic/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/generic/rte_cpuflags.h
@@ -47,9 +47,7 @@
 /**
  * Enumeration of all CPU features supported
  */
-#ifdef __DOXYGEN__
 enum rte_cpu_flag_t;
-#endif
 
 /**
  * Enumeration of CPU registers
@@ -95,6 +93,18 @@ static inline void
 rte_cpu_get_features(uint32_t leaf, uint32_t subleaf, cpuid_registers_t out);
 
 /**
+ * Get name of CPU flag
+ *
+ * @param feature
+ *     CPU flag ID
+ * @return
+ *     flag name
+ *     NULL if flag ID is invalid
+ */
+const char *
+rte_cpu_get_flag_name(enum rte_cpu_flag_t feature);
+
+/**
  * Function for checking a CPU flag availability
  *
  * @param feature
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index aa4fcbd..d8a5978 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -143,4 +143,6 @@ DPDK_2.3 {
 	global:
 
 	rte_cpu_feature_table;
+	rte_cpu_get_flag_name;
+
 } DPDK_2.2;
-- 
2.5.2