hw/microblaze: Deprecate big-endian petalogix-ml605 & xlnx-zynqmp-pmu

The petalogix-ml605 machine was explicitly added as little-endian only
machine in commit 00914b7d97 ("microblaze: Add PetaLogix ml605 MMU
little-endian ref design"). Mark the big-endian version as deprecated.

When the xlnx-zynqmp-pmu machine's CPU was added in commit 133d23b3ad
("xlnx-zynqmp-pmu: Add the CPU and memory"), its 'endianness' property
was set to %true, thus wired in little endianness.

Both machine are included in the big-endian system binary, while their
CPU is working in little-endian. Unlikely to work as it. Deprecate now
as broken config so we can remove soon.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Message-Id: <20241105130431.22564-3-philmd@linaro.org>

configs/devices/microblaze-softmmu/default.mak

@@ -2,5 +2,3 @@
 
 # Boards are selected by default, uncomment to keep out of the build.
 # CONFIG_PETALOGIX_S3ADSP1800=n
-# CONFIG_PETALOGIX_ML605=n
-# CONFIG_XLNX_ZYNQMP_PMU=n

configs/devices/microblazeel-softmmu/default.mak

@@ -1,3 +1,6 @@
 # Default configuration for microblazeel-softmmu
 
-include ../microblaze-softmmu/default.mak
+# Boards are selected by default, uncomment to keep out of the build.
+# CONFIG_PETALOGIX_S3ADSP1800=n
+# CONFIG_PETALOGIX_ML605=n
+# CONFIG_XLNX_ZYNQMP_PMU=n

docs/about/deprecated.rst

@@ -271,6 +271,12 @@ BMC and a witherspoon like OpenPOWER system. It was used for bring up
 of the AST2600 SoC in labs.  It can be easily replaced by the
 ``rainier-bmc`` machine which is a real product.
 
+Big-Endian variants of MicroBlaze ``petalogix-ml605`` and ``xlnx-zynqmp-pmu`` machines (since 9.2)
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+Both ``petalogix-ml605`` and ``xlnx-zynqmp-pmu`` were added for little endian
+CPUs. Big endian support is not tested.
+
 Backend options
 ---------------
 

hw/microblaze/petalogix_ml605_mmu.c

@@ -213,7 +213,12 @@ petalogix_ml605_init(MachineState *machine)
 
 static void petalogix_ml605_machine_init(MachineClass *mc)
 {
-    mc->desc = "PetaLogix linux refdesign for xilinx ml605 little endian";
+#if TARGET_BIG_ENDIAN
+    mc->desc = "PetaLogix linux refdesign for xilinx ml605 (big endian)";
+    mc->deprecation_reason = "big endian support is not tested";
+#else
+    mc->desc = "PetaLogix linux refdesign for xilinx ml605 (little endian)";
+#endif
     mc->init = petalogix_ml605_init;
 }
 

hw/microblaze/xlnx-zynqmp-pmu.c

@@ -181,9 +181,13 @@ static void xlnx_zynqmp_pmu_init(MachineState *machine)
 
 static void xlnx_zynqmp_pmu_machine_init(MachineClass *mc)
 {
-    mc->desc = "Xilinx ZynqMP PMU machine";
+#if TARGET_BIG_ENDIAN
+    mc->desc = "Xilinx ZynqMP PMU machine (big endian)";
+    mc->deprecation_reason = "big endian support is not tested";
+#else
+    mc->desc = "Xilinx ZynqMP PMU machine (little endian)";
+#endif
     mc->init = xlnx_zynqmp_pmu_init;
 }
 
 DEFINE_MACHINE("xlnx-zynqmp-pmu", xlnx_zynqmp_pmu_machine_init)
-