diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 4a3c302962..29de49351d 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -204,6 +204,27 @@ is going to be so much slower it wouldn't make sense for any serious
 instrumentation. Due to implementation differences there will also be
 anomalies in things like memory instrumentation.
 
+linux-user mode CPUs
+--------------------
+
+iwMMXt emulation and the ``pxa`` CPUs (since 10.0)
+''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The ``pxa`` CPU family (``pxa250``, ``pxa255``, ``pxa260``,
+``pxa261``, ``pxa262``, ``pxa270-a0``, ``pxa270-a1``, ``pxa270``,
+``pxa270-b0``, ``pxa270-b1``, ``pxa270-c0``, ``pxa270-c5``) are no
+longer used in system emulation, because all the machine types which
+used these CPUs were removed in the QEMU 9.2 release. These CPUs can
+now only be used in linux-user mode, and to do that you would have to
+explicitly select one of these CPUs with the ``-cpu`` command line
+option or the ``QEMU_CPU`` environment variable.
+
+We don't believe that anybody is using the iwMMXt emulation, and we do
+not have any tests to validate it or any real hardware or similar
+known-good implementation to test against. GCC is in the process of
+dropping their support for iwMMXt codegen. These CPU types are
+therefore deprecated in QEMU, and will be removed in a future release.
+
 System emulator CPUs
 --------------------
 
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 7a83b9ee34..32dc7c1e69 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2758,6 +2758,9 @@ static void cpu_register_class_init(ObjectClass *oc, void *data)
 
     acc->info = data;
     cc->gdb_core_xml_file = "arm-core.xml";
+    if (acc->info->deprecation_note) {
+        cc->deprecation_note = acc->info->deprecation_note;
+    }
 }
 
 void arm_cpu_register(const ARMCPUInfo *info)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 2213c27734..c2d2d99b46 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1118,6 +1118,7 @@ struct ArchCPU {
 
 typedef struct ARMCPUInfo {
     const char *name;
+    const char *deprecation_note;
     void (*initfn)(Object *obj);
     void (*class_init)(ObjectClass *oc, void *data);
 } ARMCPUInfo;
diff --git a/target/arm/tcg/cpu32.c b/target/arm/tcg/cpu32.c
index 2ad2182525..0f1c5bc87e 100644
--- a/target/arm/tcg/cpu32.c
+++ b/target/arm/tcg/cpu32.c
@@ -1026,19 +1026,31 @@ static const ARMCPUInfo arm_tcg_cpus[] = {
     { .name = "ti925t",      .initfn = ti925t_initfn },
     { .name = "sa1100",      .initfn = sa1100_initfn },
     { .name = "sa1110",      .initfn = sa1110_initfn },
-    { .name = "pxa250",      .initfn = pxa250_initfn },
-    { .name = "pxa255",      .initfn = pxa255_initfn },
-    { .name = "pxa260",      .initfn = pxa260_initfn },
-    { .name = "pxa261",      .initfn = pxa261_initfn },
-    { .name = "pxa262",      .initfn = pxa262_initfn },
+    { .name = "pxa250",      .initfn = pxa250_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa255",      .initfn = pxa255_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa260",      .initfn = pxa260_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa261",      .initfn = pxa261_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa262",      .initfn = pxa262_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
     /* "pxa270" is an alias for "pxa270-a0" */
-    { .name = "pxa270",      .initfn = pxa270a0_initfn },
-    { .name = "pxa270-a0",   .initfn = pxa270a0_initfn },
-    { .name = "pxa270-a1",   .initfn = pxa270a1_initfn },
-    { .name = "pxa270-b0",   .initfn = pxa270b0_initfn },
-    { .name = "pxa270-b1",   .initfn = pxa270b1_initfn },
-    { .name = "pxa270-c0",   .initfn = pxa270c0_initfn },
-    { .name = "pxa270-c5",   .initfn = pxa270c5_initfn },
+    { .name = "pxa270",      .initfn = pxa270a0_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa270-a0",   .initfn = pxa270a0_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa270-a1",   .initfn = pxa270a1_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa270-b0",   .initfn = pxa270b0_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa270-b1",   .initfn = pxa270b1_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa270-c0",   .initfn = pxa270c0_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
+    { .name = "pxa270-c5",   .initfn = pxa270c5_initfn,
+      .deprecation_note = "iwMMXt CPUs are no longer supported", },
 #ifndef TARGET_AARCH64
     { .name = "max",         .initfn = arm_max_initfn },
 #endif