File S390-hp-0003-Add-generic-drive-hotplugging.patch of Package kvm

From 3a47b885cb83565a684caeda37494cdfa01fb884 Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Mon, 23 Aug 2010 23:43:10 +0200
Subject: [PATCH 3/4] Add generic drive hotplugging

The monitor command for hotplugging is in i386 specific code. This is just
plain wrong, as S390 just learned how to do hotplugging too and needs to
get drives for that.

So let's add a generic copy to generic code that handles drive_add in a
way that doesn't have pci dependencies. All pci specific code can then
be handled in a pci specific function.

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v1 -> v2:

  - align generic drive_add to pci specific one
  - rework to split between generic and pci code
---
 hw/device-hotplug.c |   51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/pci-hotplug.c    |   24 ++++--------------------
 sysemu.h            |    6 +++++-
 3 files changed, 60 insertions(+), 21 deletions(-)

diff --git a/hw/device-hotplug.c b/hw/device-hotplug.c
index 8b2ed7a..eb6dd0e 100644
--- a/hw/device-hotplug.c
+++ b/hw/device-hotplug.c
@@ -26,6 +26,9 @@
 #include "boards.h"
 #include "net.h"
 #include "blockdev.h"
+#include "qemu-config.h"
+#include "sysemu.h"
+#include "monitor.h"
 
 DriveInfo *add_init_drive(const char *optstr)
 {
@@ -44,3 +47,51 @@ DriveInfo *add_init_drive(const char *optstr)
 
     return dinfo;
 }
+
+#if !defined(TARGET_I386)
+int pci_drive_hot_add(Monitor *mon, const QDict *qdict,
+                      DriveInfo *dinfo, int type)
+{
+    /* On non-x86 we don't do PCI hotplug */
+    monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
+    return -1;
+}
+#endif
+
+/*
+ * This version of drive_hot_add does not know anything about PCI specifics.
+ * It is used as fallback on architectures that don't implement pci-hotplug.
+ */
+void drive_hot_add(Monitor *mon, const QDict *qdict)
+{
+    int type;
+    DriveInfo *dinfo = NULL;
+    const char *opts = qdict_get_str(qdict, "opts");
+
+    dinfo = add_init_drive(opts);
+    if (!dinfo) {
+        goto err;
+    }
+    if (dinfo->devaddr) {
+        monitor_printf(mon, "Parameter addr not supported\n");
+        goto err;
+    }
+    type = dinfo->type;
+
+    switch (type) {
+    case IF_NONE:
+        monitor_printf(mon, "OK\n");
+        break;
+    default:
+        if (pci_drive_hot_add(mon, qdict, dinfo, type)) {
+            goto err;
+        }
+    }
+    return;
+
+err:
+    if (dinfo) {
+        drive_put_ref(dinfo);
+    }
+    return;
+}
diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
index b59be2a..f08d367 100644
--- a/hw/pci-hotplug.c
+++ b/hw/pci-hotplug.c
@@ -103,24 +103,13 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
     return 0;
 }
 
-void drive_hot_add(Monitor *mon, const QDict *qdict)
+int pci_drive_hot_add(Monitor *mon, const QDict *qdict,
+                      DriveInfo *dinfo, int type)
 {
     int dom, pci_bus;
     unsigned slot;
-    int type;
     PCIDevice *dev;
-    DriveInfo *dinfo = NULL;
     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
-    const char *opts = qdict_get_str(qdict, "opts");
-
-    dinfo = add_init_drive(opts);
-    if (!dinfo)
-        goto err;
-    if (dinfo->devaddr) {
-        monitor_printf(mon, "Parameter addr not supported\n");
-        goto err;
-    }
-    type = dinfo->type;
 
     switch (type) {
     case IF_SCSI:
@@ -137,19 +126,14 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
             goto err;
         }
         break;
-    case IF_NONE:
-        monitor_printf(mon, "OK\n");
-        break;
     default:
         monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
         goto err;
     }
-    return;
 
+    return 0;
 err:
-    if (dinfo)
-        drive_put_ref(dinfo);
-    return;
+    return -1;
 }
 
 static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
diff --git a/sysemu.h b/sysemu.h
index d3013f5..9c8e50f 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -144,9 +144,13 @@ extern unsigned int nb_prom_envs;
 
 /* pci-hotplug */
 void pci_device_hot_add(Monitor *mon, const QDict *qdict);
-void drive_hot_add(Monitor *mon, const QDict *qdict);
+int pci_drive_hot_add(Monitor *mon, const QDict *qdict,
+                      DriveInfo *dinfo, int type);
 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict);
 
+/* generic hotplug */
+void drive_hot_add(Monitor *mon, const QDict *qdict);
+
 /* pcie aer error injection */
 void pcie_aer_inject_error_print(Monitor *mon, const QObject *data);
 int do_pcie_aer_inejct_error(Monitor *mon,
-- 
1.6.0.2