perf header: remove unecessary core id test

JIRA: https://issues.redhat.com/browse/RHEL-78200

upstream
========
commit 13b38e6
Author: Anubhav Shelat <ashelat@redhat.com>
Date: Wed Jun 18 10:29:22 2025 -0400

description
===========
It is possible for systems to have a greater socket id number than the
number of cpus present on a machine, so this test is obselete and should
be removed.

    Signed-off-by: Anubhav Shelat <ashelat@redhat.com>
    Reviewed-by: Ian Rogers <irogers@google.com>
    Link: https://lore.kernel.org/r/20250618142921.4053400-2-ashelat@redhat.com
    Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Signed-off-by: Anubhav Shelat <ashelat@redhat.com>

Author: AnubhavS1

tools/perf/util/header.c

@@ -2559,7 +2559,6 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
 	int cpu_nr = ff->ph->env.nr_cpus_avail;
 	u64 size = 0;
 	struct perf_header *ph = ff->ph;
-	bool do_core_id_test = true;
 
 	ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
 	if (!ph->env.cpu)
@@ -2614,15 +2613,6 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
 		return 0;
 	}
 
-	/* On s390 the socket_id number is not related to the numbers of cpus.
-	 * The socket_id number might be higher than the numbers of cpus.
-	 * This depends on the configuration.
-	 * AArch64 is the same.
-	 */
-	if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4)
-			  || !strncmp(ph->env.arch, "aarch64", 7)))
-		do_core_id_test = false;
-
 	for (i = 0; i < (u32)cpu_nr; i++) {
 		if (do_read_u32(ff, &nr))
 			goto free_cpu;
@@ -2633,12 +2623,6 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
 		if (do_read_u32(ff, &nr))
 			goto free_cpu;
 
-		if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) {
-			pr_debug("socket_id number is too big."
-				 "You may need to upgrade the perf tool.\n");
-			goto free_cpu;
-		}
-
 		ph->env.cpu[i].socket_id = nr;
 		size += sizeof(u32);
 	}