diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 58cb992609..e7c9edd033 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -398,10 +398,8 @@ static const TypeInfo spapr_cpu_core_type_infos[] = {
     DEFINE_SPAPR_CPU_CORE_TYPE("power8_v2.0"),
     DEFINE_SPAPR_CPU_CORE_TYPE("power8e_v2.1"),
     DEFINE_SPAPR_CPU_CORE_TYPE("power8nvl_v1.0"),
-    DEFINE_SPAPR_CPU_CORE_TYPE("power9_v1.0"),
     DEFINE_SPAPR_CPU_CORE_TYPE("power9_v2.0"),
     DEFINE_SPAPR_CPU_CORE_TYPE("power9_v2.2"),
-    DEFINE_SPAPR_CPU_CORE_TYPE("power10_v1.0"),
     DEFINE_SPAPR_CPU_CORE_TYPE("power10_v2.0"),
 #ifdef CONFIG_KVM
     DEFINE_SPAPR_CPU_CORE_TYPE("host"),
diff --git a/target/ppc/cpu-models.c b/target/ppc/cpu-models.c
index 36e465b390..f2301b43f7 100644
--- a/target/ppc/cpu-models.c
+++ b/target/ppc/cpu-models.c
@@ -728,14 +728,10 @@
                 "POWER8 v2.0")
     POWERPC_DEF("power8nvl_v1.0", CPU_POWERPC_POWER8NVL_v10,         POWER8,
                 "POWER8NVL v1.0")
-    POWERPC_DEF("power9_v1.0",   CPU_POWERPC_POWER9_DD1,             POWER9,
-                "POWER9 v1.0")
     POWERPC_DEF("power9_v2.0",   CPU_POWERPC_POWER9_DD20,            POWER9,
                 "POWER9 v2.0")
     POWERPC_DEF("power9_v2.2",   CPU_POWERPC_POWER9_DD22,            POWER9,
                 "POWER9 v2.2")
-    POWERPC_DEF("power10_v1.0",  CPU_POWERPC_POWER10_DD1,            POWER10,
-                "POWER10 v1.0")
     POWERPC_DEF("power10_v2.0",  CPU_POWERPC_POWER10_DD20,           POWER10,
                 "POWER10 v2.0")
 #endif /* defined (TARGET_PPC64) */
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index 1d3d1db7c3..572cbdf25f 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -6350,10 +6350,7 @@ static bool ppc_pvr_match_power9(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
         return false;
     }
 
-    if ((pvr & 0x0f00) == 0x100) {
-        /* DD1.x always matches power9_v1.0 */
-        return true;
-    } else if ((pvr & 0x0f00) == 0x200) {
+    if ((pvr & 0x0f00) == 0x200) {
         if ((pvr & 0xf) < 2) {
             /* DD2.0, DD2.1 match power9_v2.0 */
             if ((pcc->pvr & 0xf) == 0) {
@@ -6536,7 +6533,7 @@ static bool ppc_pvr_match_power10(PowerPCCPUClass *pcc, uint32_t pvr, bool best)
     }
 
     if ((pvr & 0x0f00) == (pcc->pvr & 0x0f00)) {
-        /* Major DD version matches to power10_v1.0 and power10_v2.0 */
+        /* Major DD version matches power10_v2.0 */
         return true;
     }
 
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index bcf30a5400..525fbe3892 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2369,17 +2369,6 @@ static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data)
 
 #if defined(TARGET_PPC64)
     pcc->radix_page_info = kvmppc_get_radix_page_info();
-
-    if ((pcc->pvr & 0xffffff00) == CPU_POWERPC_POWER9_DD1) {
-        /*
-         * POWER9 DD1 has some bugs which make it not really ISA 3.00
-         * compliant.  More importantly, advertising ISA 3.00
-         * architected mode may prevent guests from activating
-         * necessary DD1 workarounds.
-         */
-        pcc->pcr_supported &= ~(PCR_COMPAT_3_00 | PCR_COMPAT_2_07
-                                | PCR_COMPAT_2_06 | PCR_COMPAT_2_05);
-    }
 #endif /* defined(TARGET_PPC64) */
 }