diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
index 8fc2e8e72f..c346b76bdf 100644
--- a/target/s390x/gen-features.c
+++ b/target/s390x/gen-features.c
@@ -13,6 +13,7 @@
 
 #include <inttypes.h>
 #include <stdio.h>
+#include <string.h>
 #include "cpu_features_def.h"
 
 #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
@@ -419,6 +420,10 @@ static uint16_t base_GEN14_GA1[] = {
 
 #define base_GEN14_GA2 EmptyFeat
 
+static uint16_t base_GEN15_GA1[] = {
+    S390_FEAT_MISC_INSTRUCTION_EXT3,
+};
+
 /* Full features (in order of release)
  * Automatically includes corresponding base features.
  * Full features are all features this hardware supports even if kvm/QEMU do not
@@ -548,6 +553,16 @@ static uint16_t full_GEN14_GA1[] = {
 
 #define full_GEN14_GA2 EmptyFeat
 
+static uint16_t full_GEN15_GA1[] = {
+    S390_FEAT_VECTOR_ENH2,
+    S390_FEAT_GROUP_ENH_SORT,
+    S390_FEAT_GROUP_DEFLATE_CONVERSION,
+    S390_FEAT_VECTOR_BCD_ENH,
+    S390_FEAT_GROUP_MSA_EXT_9,
+    S390_FEAT_GROUP_MSA_EXT_9_PCKMO,
+    S390_FEAT_ETOKEN,
+};
+
 /* Default features (in order of release)
  * Automatically includes corresponding base features.
  * Default features are all features this version of QEMU supports for this
@@ -624,6 +639,16 @@ static uint16_t default_GEN14_GA1[] = {
 
 #define default_GEN14_GA2 EmptyFeat
 
+static uint16_t default_GEN15_GA1[] = {
+    S390_FEAT_VECTOR_ENH2,
+    S390_FEAT_GROUP_ENH_SORT,
+    S390_FEAT_GROUP_DEFLATE_CONVERSION,
+    S390_FEAT_VECTOR_BCD_ENH,
+    S390_FEAT_GROUP_MSA_EXT_9,
+    S390_FEAT_GROUP_MSA_EXT_9_PCKMO,
+    S390_FEAT_ETOKEN,
+};
+
 /* QEMU (CPU model) features */
 
 static uint16_t qemu_V2_11[] = {
@@ -740,6 +765,7 @@ static CpuFeatDefSpec CpuFeatDef[] = {
     CPU_FEAT_INITIALIZER(GEN13_GA2),
     CPU_FEAT_INITIALIZER(GEN14_GA1),
     CPU_FEAT_INITIALIZER(GEN14_GA2),
+    CPU_FEAT_INITIALIZER(GEN15_GA1),
 };
 
 #define FEAT_GROUP_INITIALIZER(_name)                  \
@@ -808,6 +834,11 @@ static void set_bits(uint64_t list[], BitSpec bits)
     }
 }
 
+static inline void clear_bit(uint64_t list[], unsigned long nr)
+{
+    list[nr / 64] &= ~(1ULL << (nr % 64));
+}
+
 static void print_feature_defs(void)
 {
     uint64_t base_feat[S390_FEAT_MAX / 64 + 1] = {};
@@ -818,6 +849,12 @@ static void print_feature_defs(void)
     printf("\n/* CPU model feature list data */\n");
 
     for (i = 0; i < ARRAY_SIZE(CpuFeatDef); i++) {
+        /* With gen15 CSSKE and BPB are deprecated */
+        if (strcmp(CpuFeatDef[i].name, "S390_FEAT_LIST_GEN15_GA1") == 0) {
+            clear_bit(base_feat, S390_FEAT_CONDITIONAL_SSKE);
+            clear_bit(default_feat, S390_FEAT_CONDITIONAL_SSKE);
+            clear_bit(default_feat, S390_FEAT_BPB);
+        }
         set_bits(base_feat, CpuFeatDef[i].base_bits);
         /* add the base to the default features */
         set_bits(default_feat, CpuFeatDef[i].base_bits);