From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Thu, 25 Jul 2013 14:37:37 +0000 (+0200)
Subject: s390: provide I/O subsystem reset
X-Git-Tag: v2.7.1~2317^2~4
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=4e872a3fb024f0d742ef6b48be3afaab2c4453fc;p=mirror_qemu.git

s390: provide I/O subsystem reset

Provide a function that resets the I/O subsystem.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Alexander Graf <agraf@suse.de>
---

diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index aebbbf1755..8fd46a92c9 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -17,6 +17,21 @@
 #include "css.h"
 #include "virtio-ccw.h"
 
+void io_subsystem_reset(void)
+{
+    DeviceState *css, *sclp;
+
+    css = DEVICE(object_resolve_path_type("", "virtual-css-bridge", NULL));
+    if (css) {
+        qdev_reset_all(css);
+    }
+    sclp = DEVICE(object_resolve_path_type("",
+                  "s390-sclp-event-facility", NULL));
+    if (sclp) {
+        qdev_reset_all(sclp);
+    }
+}
+
 static int virtio_ccw_hcall_notify(const uint64_t *args)
 {
     uint64_t subch_id = args[0];
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 0878ab6678..af9de5ed0b 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -400,6 +400,7 @@ void cpu_unlock(void);
 typedef struct SubchDev SubchDev;
 
 #ifndef CONFIG_USER_ONLY
+extern void io_subsystem_reset(void);
 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid,
                          uint16_t schid);
 bool css_subch_visible(SubchDev *sch);