ppc: Deprecate qemu-system-ppcemb

qemu-system-ppcemb has been once split of qemu-system-ppc to support
CPU page sizes < 4096 for some of the embedded 4xx PowerPC CPUs.
However, there was hardly any OS available in the wild that really
used such small page sizes (Linux uses 4096 on PPC), so there is
no known recent use case for this separate build anymore. It's
rather cumbersome to maintain a separate set of config switches for
this, and it's wasting compile and test time of all the developers
who have to build all QEMU targets to verify that their changes did
not break anything.

Except for the small CPU page sizes, qemu-system-ppc can be used as
a full replacement for qemu-system-ppcemb since it contains all the
embedded 4xx PPC boards and CPUs, too. Thus let's start the deprecation
process for qemu-system-ppcemb to see whether somebody still needs
the small page sizes or whether we could finally remove this unloved
separate build.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
index e92db2c66afa1be60bbd6d772df1e02649c3c0c0..6f7f2ee168f74fe51dbf191bb60eccb3aaabc678 100644 (file)
--- a/hw/ppc/ppc405_boards.c
+++ b/hw/ppc/ppc405_boards.c
@@ -202,6 +202,13 @@ static void ref405ep_init(MachineState *machine)
     DriveInfo *dinfo;
     MemoryRegion *sysmem = get_system_memory();
 
+#ifdef TARGET_PPCEMB
+    if (!qtest_enabled()) {
+        warn_report("qemu-system-ppcemb is deprecated, "
+                    "please use qemu-system-ppc instead.");
+    }
+#endif
+
     /* XXX: fix this */
     memory_region_allocate_system_memory(&ram_memories[0], NULL, "ef405ep.ram",
                                          0x08000000);
@@ -497,6 +504,13 @@ static void taihu_405ep_init(MachineState *machine)
     int fl_idx, fl_sectors;
     DriveInfo *dinfo;
 
+#ifdef TARGET_PPCEMB
+    if (!qtest_enabled()) {
+        warn_report("qemu-system-ppcemb is deprecated, "
+                    "please use qemu-system-ppc instead.");
+    }
+#endif
+
     /* RAM is soldered to the board so the size cannot be changed */
     ram_size = 0x08000000;
     memory_region_allocate_system_memory(ram, NULL, "taihu_405ep.ram",

diff --git a/hw/ppc/ppc440_bamboo.c b/hw/ppc/ppc440_bamboo.c
index 693c2151082a2e8adb76a46379a0f20175d094b5..a299206fd4c09813c5e640aad04abfe330e14228 100644 (file)
--- a/hw/ppc/ppc440_bamboo.c
+++ b/hw/ppc/ppc440_bamboo.c
@@ -13,6 +13,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu-common.h"
+#include "qemu/error-report.h"
 #include "net/net.h"
 #include "hw/hw.h"
 #include "hw/pci/pci.h"
@@ -27,6 +28,7 @@
 #include "hw/ppc/ppc.h"
 #include "ppc405.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/qtest.h"
 #include "hw/sysbus.h"
 
 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
@@ -191,6 +193,13 @@ static void bamboo_init(MachineState *machine)
         exit(1);
     }
 
+#ifdef TARGET_PPCEMB
+    if (!qtest_enabled()) {
+        warn_report("qemu-system-ppcemb is deprecated, "
+                    "please use qemu-system-ppc instead.");
+    }
+#endif
+
     qemu_register_reset(main_cpu_reset, cpu);
     ppc_booke_timers_init(cpu, 400000000, 0);
     ppc_dcr_init(env, NULL, NULL);

diff --git a/hw/ppc/virtex_ml507.c b/hw/ppc/virtex_ml507.c
index 5ac4f7661394dec1c23bfd6a7fa9b9aa75be768b..9fe7655074a48f0186b48e75f6abcda18d7c0a51 100644 (file)
--- a/hw/ppc/virtex_ml507.c
+++ b/hw/ppc/virtex_ml507.c
@@ -29,6 +29,7 @@
 #include "hw/char/serial.h"
 #include "hw/block/flash.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/qtest.h"
 #include "hw/devices.h"
 #include "hw/boards.h"
 #include "sysemu/device_tree.h"
@@ -210,6 +211,13 @@ static void virtex_init(MachineState *machine)
     int kernel_size;
     int i;
 
+#ifdef TARGET_PPCEMB
+    if (!qtest_enabled()) {
+        warn_report("qemu-system-ppcemb is deprecated, "
+                    "please use qemu-system-ppc instead.");
+    }
+#endif
+
     /* init CPUs */
     cpu = ppc440_init_xilinx(&ram_size, 1, machine->cpu_type, 400000000);
     env = &cpu->env;

diff --git a/qemu-doc.texi b/qemu-doc.texi
index 79d08b3f044159c56c9c001affbfbfa2c5e191c6..19a82bfea3efc0478ce85bc99db1c5c77a638cd7 100644 (file)
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -2773,6 +2773,12 @@ The ``host_net_remove'' command is replaced by the ``netdev_del'' command.
 The ``ivshmem'' device type is replaced by either the ``ivshmem-plain''
 or ``ivshmem-doorbell`` device types.
 
+@subsection Page size support < 4k for embedded PowerPC CPUs (since 2.12.0)
+
+qemu-system-ppcemb will be removed. qemu-system-ppc (or qemu-system-ppc64)
+should be used instead. That means that embedded 4xx PowerPC CPUs will not
+support page sizes < 4096 any longer.
+
 @section System emulator machines
 
 @subsection Xilinx EP108 (since 2.11.0)