[PATCH]powerpc/xmon: Dump XIVE information for online-only processors.

[Sachin Sant <sachinp@linux.vnet.ibm.com>]

dxa command in XMON debugger iterates through all possible processors.
As a result, empty lines are printed even for processors which are not
online.

CPU 47:pp=00 CPPR=ff IPI=0x0040002f PQ=-- EQ idx=699 T=0 00000000 00000000
CPU 48:
CPU 49:

Restrict XIVE information(dxa) to be displayed for online processors only.

Signed-off-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
---
diff -Naurp a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
--- a/arch/powerpc/xmon/xmon.c	2022-01-05 08:52:59.480118166 -0500
+++ b/arch/powerpc/xmon/xmon.c	2022-01-05 08:56:18.469589555 -0500
@@ -2817,12 +2817,12 @@ static void dump_all_xives(void)
 {
 	int cpu;
 
-	if (num_possible_cpus() == 0) {
+	if (num_online_cpus() == 0) {
 		printf("No possible cpus, use 'dx #' to dump individual cpus\n");
 		return;
 	}
 
-	for_each_possible_cpu(cpu)
+	for_each_online_cpu(cpu)
 		dump_one_xive(cpu);
 }