1 files changed, 26 insertions, 1 deletions

diff --git a/tools/perf/arch/s390/annotate/instructions.c b/tools/perf/arch/s390/annotate/instructions.c
index 8c72b44444cb..01df9d8303e1 100644
--- a/tools/perf/arch/s390/annotate/instructions.c
+++ b/tools/perf/arch/s390/annotate/instructions.c
@@ -23,12 +23,37 @@ static struct ins_ops *s390__associate_ins_ops(struct arch *arch, const char *na
         return ops;
 }
 
+static int s390__cpuid_parse(struct arch *arch, char *cpuid)
+{
+        unsigned int family;
+        char model[16], model_c[16], cpumf_v[16], cpumf_a[16];
+        int ret;
+
+        /*
+         * cpuid string format:
+         * "IBM,family,model-capacity,model[,cpum_cf-version,cpum_cf-authorization]"
+         */
+        ret = sscanf(cpuid, "%*[^,],%u,%[^,],%[^,],%[^,],%s", &family, model_c,
+                     model, cpumf_v, cpumf_a);
+        if (ret >= 2) {
+                arch->family = family;
+                arch->model = 0;
+                return 0;
+        }
+
+        return -1;
+}
+
 static int s390__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
 {
+        int err = 0;
+
         if (!arch->initialized) {
                 arch->initialized = true;
                 arch->associate_instruction_ops = s390__associate_ins_ops;
+                if (cpuid)
+                        err = s390__cpuid_parse(arch, cpuid);
         }
 
-        return 0;
+        return err;
 }