[PATCH] docs/about: Mark the old pc-i440fx-2.0 - 2.3 machine types as deprecated

[Thomas Huth <thuth@redhat.com>]

As we've seen in the past, it's useful for deprecating old machine
types to finally be able to get of legacy code or do other clean-ups
(see e.g. commit ea985d235b868047 that was used to drop the PCI code in
the 128k bios binaries to free some precious space in those binaries).

So let's continue deprecating the oldest pc machine types. QEMU 2.3
has been released 8 years ago, so that's plenty of time since such
machine types have been used by default, thus deprecating pc-i440fx-2.0
up to pc-i440fx-2.3 should be fine nowadays.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/deprecated.rst | 8 ++++++++
 hw/i386/pc_piix.c         | 1 +
 2 files changed, 9 insertions(+)

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index e43de9c183..c016bb9b20 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -277,6 +277,14 @@ deprecated; use the new name ``dtb-randomness`` instead. The new name
 better reflects the way this property affects all random data within
 the device tree blob, not just the ``kaslr-seed`` node.
 
+``pc-i440fx-2.0`` up to ``pc-i440fx-2.3`` (since 8.2)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+These old machine types are quite neglected nowadays and thus might have
+various pitfalls with regards to live migration. Use a newer machine type
+instead.
+
+
 Backend options
 ---------------
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index ff8654ecda..9789e9e75c 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -784,6 +784,7 @@ static void pc_i440fx_2_3_machine_options(MachineClass *m)
 {
     pc_i440fx_2_4_machine_options(m);
     m->hw_version = "2.3.0";
+    m->deprecation_reason = "old and unattended - use a newer version instead";
     compat_props_add(m->compat_props, hw_compat_2_3, hw_compat_2_3_len);
     compat_props_add(m->compat_props, pc_compat_2_3, pc_compat_2_3_len);
 }
-- 
2.41.0