lparstat: print memory mode correctly

Starting from power10, active memory sharing(AMS) is not supported.
So from power10 onwards the H_GET_MPP hcall fails and hence
corresponding fields in lparcfg are not populated, such as
entitled_memory_pool_number etc.

Use gcc builtins and print memory model as dedicated for power10
onwards.

Suggested-by: Peter Bergner <[email protected]>
Signed-off-by: Shrikanth Hegde <[email protected]>
[tyreld: fixup arch test to use newly defined BUILTIN wrapper]
Signed-off-by: Tyrel Datwyler <[email protected]>

Author: Shrikanth Hegde

src/common/cpu_info_helpers.h

@@ -47,4 +47,10 @@ extern int __get_one_smt_state(int core, int threads_per_cpu);
 extern int __do_smt(bool numeric, int cpus_in_system, int threads_per_cpu,
 		    bool print_smt_state);
 
+#if defined (__powerpc__) && defined (__BUILTIN_CPU_SUPPORTS__)
+# define BUILTIN_CPU_SUPPORTS(X) __builtin_cpu_supports(X)
+#else
+# define BUILTIN_CPU_SUPPORTS(X) 0
+#endif
+
 #endif /* CPU_INFO_H */

src/lparstat.c

@@ -794,7 +794,11 @@ void get_memory_mode(struct sysentry *se, char *buf)
 	struct sysentry *tmp;
 
 	tmp = get_sysentry("entitled_memory_pool_number");
-	if (atoi(tmp->value) == 65535)
+	/*
+	 * from power10 onwards Active Memory Sharing(AMS) is not
+	 * supported. Hence always display it as dedicated for those
+	 */
+	if (atoi(tmp->value) == 65535 || BUILTIN_CPU_SUPPORTS("arch_3_1"))
 		sprintf(buf, "Dedicated");
 	else
 		sprintf(buf, "Shared");