diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 47368c92f28f634fc1389128e3a916ab881c80ff..693f44730ab92407396d6864241f09c60d11399f 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1651,15 +1651,21 @@ void acpi_setup(PcGuestInfo *guest_info)
     fw_cfg_add_file(guest_info->fw_cfg, ACPI_BUILD_TPMLOG_FILE,
                     tables.tcpalog->data, acpi_data_len(tables.tcpalog));
 
-    /*
-     * Though RSDP is small, its contents isn't immutable, so
-     * update it along with the rest of tables on guest access.
-     */
-    fw_cfg_add_file_callback(guest_info->fw_cfg, ACPI_BUILD_RSDP_FILE,
-                             acpi_build_update, build_state,
-                             tables.rsdp->data, acpi_data_len(tables.rsdp));
-
-    build_state->rsdp = tables.rsdp->data;
+    if (guest_info->has_immutable_rsdp) {
+        /*
+         * Keep for compatibility with old machine types.
+         * Though RSDP is small, its contents isn't immutable, so
+         * update it along with the rest of tables on guest access.
+         */
+        fw_cfg_add_file_callback(guest_info->fw_cfg, ACPI_BUILD_RSDP_FILE,
+                                 acpi_build_update, build_state,
+                                 tables.rsdp->data, acpi_data_len(tables.rsdp));
+        build_state->rsdp = tables.rsdp->data;
+    } else {
+        build_state->rsdp = qemu_get_ram_ptr(
+            acpi_add_rom_blob(build_state, tables.rsdp, ACPI_BUILD_RSDP_FILE, 0)
+        );
+    }
 
     qemu_register_reset(acpi_build_reset, build_state);
     acpi_build_reset(build_state);
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index de75cf0e87909a14af323c22ee683408dd692e08..76744cf4f50e01e9bea5399f2f3d46fd389120cc 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -60,6 +60,7 @@ static const int ide_iobase2[MAX_IDE_BUS] = { 0x3f6, 0x376 };
 static const int ide_irq[MAX_IDE_BUS] = { 14, 15 };
 
 static bool has_acpi_build = true;
+static bool has_immutable_rsdp;
 static int legacy_acpi_table_size;
 static bool smbios_defaults = true;
 static bool smbios_legacy_mode;
@@ -168,6 +169,7 @@ static void pc_init1(MachineState *machine,
 
     guest_info->isapc_ram_fw = !pci_enabled;
     guest_info->has_reserved_memory = has_reserved_memory;
+    guest_info->has_immutable_rsdp = has_immutable_rsdp;
 
     if (smbios_defaults) {
         MachineClass *mc = MACHINE_GET_CLASS(machine);
@@ -310,6 +312,7 @@ static void pc_init_pci(MachineState *machine)
 
 static void pc_compat_2_2(MachineState *machine)
 {
+    has_immutable_rsdp = true;
     x86_cpu_compat_set_features("kvm64", FEAT_1_EDX, 0, CPUID_VME);
     x86_cpu_compat_set_features("kvm32", FEAT_1_EDX, 0, CPUID_VME);
     x86_cpu_compat_set_features("Conroe", FEAT_1_EDX, 0, CPUID_VME);
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 63027ee76bb79cf0ca318ef7648f7e9e01f8ce39..6151f2ffbe657dd65ec57aef06028523e871b83f 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -50,6 +50,7 @@
 #define MAX_SATA_PORTS     6
 
 static bool has_acpi_build = true;
+static bool has_immutable_rsdp;
 static bool smbios_defaults = true;
 static bool smbios_legacy_mode;
 static bool smbios_uuid_encoded = true;
@@ -154,6 +155,7 @@ static void pc_q35_init(MachineState *machine)
     guest_info->isapc_ram_fw = false;
     guest_info->has_acpi_build = has_acpi_build;
     guest_info->has_reserved_memory = has_reserved_memory;
+    guest_info->has_immutable_rsdp = has_immutable_rsdp;
 
     /* Migration was not supported in 2.0 for Q35, so do not bother
      * with this hack (see hw/i386/acpi-build.c).
@@ -289,6 +291,7 @@ static void pc_q35_init(MachineState *machine)
 
 static void pc_compat_2_2(MachineState *machine)
 {
+    has_immutable_rsdp = true;
     x86_cpu_compat_set_features("kvm64", FEAT_1_EDX, 0, CPUID_VME);
     x86_cpu_compat_set_features("kvm32", FEAT_1_EDX, 0, CPUID_VME);
     x86_cpu_compat_set_features("Conroe", FEAT_1_EDX, 0, CPUID_VME);
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index dddd2553896db18aa612b64281f62ec83bcdb418..85cc86a74f6d34f239b4901d30c7fce10bdb8611 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -104,6 +104,7 @@ struct PcGuestInfo {
     int legacy_acpi_table_size;
     bool has_acpi_build;
     bool has_reserved_memory;
+    bool has_immutable_rsdp;
 };
 
 /* parallel.c */