[Qemu-devel] [PATCH] hw/i386: Deprecate the machines pc-0.10 to pc-0.15

[Thomas Huth <thuth@redhat.com>]

We don't want to carry along old machine types forever. If we are able to
remove the pc machines up to 0.13 one day for example, this would allow
us to eventually kill the code for rombar=0 (i.e. where QEMU copies ROM
BARs directly to low memory). So let's start with a deprecation message
for the old 0.xx machine types so that the (hopefully) few users of these
old systems start switching over to newer machine types instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 Note: I've decided to print the warning for all pc-0.* machine types,
 but that of course doesn't mean that we also have to remove them all at
 once when we decide to finally really remove some. We could then also
 start by removing 0.10 and 0.11 only, for example (since there should
 really be no users left for these), or only up to 0.13 (to be able to
 kill rombar=0), as discussed in the "Deprecating old machine types"
 mail thread recently.

 hw/i386/pc_piix.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 9f102aa..16e2fb7 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -38,6 +38,7 @@
 #include "sysemu/kvm.h"
 #include "hw/kvm/clock.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/qtest.h"
 #include "hw/sysbus.h"
 #include "sysemu/arch_init.h"
 #include "sysemu/block-backend.h"
@@ -85,6 +86,12 @@ static void pc_init1(MachineState *machine,
     MemoryRegion *rom_memory;
     ram_addr_t lowmem;
 
+    if (!qtest_enabled() && !strncmp(MACHINE_CLASS(pcmc)->name, "pc-0.", 5)) {
+        error_report("Machine type '%s' is deprecated, "
+                     "please use a newer type instead",
+                     MACHINE_CLASS(pcmc)->name);
+    }
+
     /*
      * Calculate ram split, for memory below and above 4G.  It's a bit
      * complicated for backward compatibility reasons ...
-- 
1.8.3.1