From f869cc062302515f4d031305584386ead0d32714 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Thu, 21 Feb 2019 09:11:01 +0000
Subject: [PATCH 2/2] fdc: Restrict floppy controllers to RHEL-7 machine types

RH-Author: Markus Armbruster <armbru@redhat.com>
Message-id: <20190221091101.31999-3-armbru@redhat.com>
Patchwork-id: 84693
O-Subject: [RHEL-8.0/AV qemu-kvm PATCH v2 2/2] fdc: Restrict floppy controllers to RHEL-7 machine types
Bugzilla: 1664997
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>

Make floppy controllers' realize() fail except with RHEL-7 machine
types.  The "is a RHEL-7 machine type" test is a bit of a hack: it
looks for "-rhel7." in the machine type name.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/block/fdc.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 6f19f12..9ece2db 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -42,6 +42,8 @@
 #include "qemu/log.h"
 #include "trace.h"
 
+#include "hw/boards.h"
+
 /********************************************************/
 /* debug Floppy devices */
 
@@ -2629,6 +2631,14 @@ static void fdctrl_realize_common(DeviceState *dev, FDCtrl *fdctrl,
     int i, j;
     static int command_tables_inited = 0;
 
+    /* Restricted for Red Hat Enterprise Linux: */
+    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
+    if (!strstr(mc->name, "-rhel7.")) {
+        error_setg(errp, "Device %s is not supported with machine type %s",
+                   object_get_typename(OBJECT(dev)), mc->name);
+        return;
+    }
+
     if (fdctrl->fallback == FLOPPY_DRIVE_TYPE_AUTO) {
         error_setg(errp, "Cannot choose a fallback FDrive type of 'auto'");
     }
-- 
1.8.3.1