pc: reduce duplication, fix PIIX descriptions

We have a lot of code duplication between machine types,
this increases with each new machine type
and each new field.

This has already introduced a minor bug: description
for pc-1.3 says "Standard PC" while description for
pc-1.4 is "Standard PC (i440FX + PIIX, 1996)"
which makes you think 1.3 is somehow more standard,
or newer, while in fact it's a revision of the same PC.

This patch addresses this issue by using macros, along
the lines used by PC_COMPAT_X_X - only for
non-property options.

The approach can extend to non-PC machine types.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 14 insertions, 11 deletions

diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 291ad97c5f..d7b7c3bf9a 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -253,35 +253,38 @@ static void pc_q35_init_1_4(QEMUMachineInitArgs *args)
     pc_q35_init(args);
 }
 
+#define PC_Q35_MACHINE_OPTIONS \
+    PC_DEFAULT_MACHINE_OPTIONS, \
+    .desc = "Standard PC (Q35 + ICH9, 2009)", \
+    .hot_add_cpu = pc_hot_add_cpu
+
+#define PC_Q35_1_6_MACHINE_OPTIONS PC_Q35_MACHINE_OPTIONS
+
 static QEMUMachine pc_q35_machine_v1_6 = {
+    PC_Q35_1_6_MACHINE_OPTIONS,
     .name = "pc-q35-1.6",
     .alias = "q35",
-    .desc = "Standard PC (Q35 + ICH9, 2009)",
     .init = pc_q35_init_1_6,
-    .hot_add_cpu = pc_hot_add_cpu,
-    .max_cpus = 255,
-    .default_boot_order = "cad",
 };
 
 static QEMUMachine pc_q35_machine_v1_5 = {
+    PC_Q35_1_6_MACHINE_OPTIONS,
     .name = "pc-q35-1.5",
-    .desc = "Standard PC (Q35 + ICH9, 2009)",
     .init = pc_q35_init_1_5,
-    .hot_add_cpu = pc_hot_add_cpu,
-    .max_cpus = 255,
-    .default_boot_order = "cad",
     .compat_props = (GlobalProperty[]) {
         PC_COMPAT_1_5,
         { /* end of list */ }
     },
 };
 
+#define PC_Q35_1_4_MACHINE_OPTIONS \
+    PC_Q35_1_6_MACHINE_OPTIONS, \
+    .hot_add_cpu = NULL
+
 static QEMUMachine pc_q35_machine_v1_4 = {
+    PC_Q35_1_4_MACHINE_OPTIONS,
     .name = "pc-q35-1.4",
-    .desc = "Standard PC (Q35 + ICH9, 2009)",
     .init = pc_q35_init_1_4,
-    .max_cpus = 255,
-    .default_boot_order = "cad",
     .compat_props = (GlobalProperty[]) {
         PC_COMPAT_1_4,
         { /* end of list */ }