diff mbox

[v3,2/4] S390: Add virtio-blk boot

Message ID 1367342159-21545-3-git-send-email-dingel@linux.vnet.ibm.com
State New
Headers show

Commit Message

Dominik Dingel April 30, 2013, 5:15 p.m. UTC 
If no kernel IPL entry is specified, boot the bios and pass if available
device information for the first boot device (as given by the boot index).

The provided information will be used in the next commit from the BIOS.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
diff mbox

Patch

diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index d14c548..5c26873 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -16,6 +16,8 @@ 
 #include "elf.h"
 #include "hw/loader.h"
 #include "hw/sysbus.h"
+#include "hw/s390x/virtio-ccw.h"
+#include "hw/s390x/css.h"
 
 #define KERN_IMAGE_START                0x010000UL
 #define KERN_PARM_AREA                  0x010480UL
@@ -150,6 +152,22 @@  static void s390_ipl_reset(DeviceState *dev)
 
     env->psw.addr = ipl->start_addr;
     env->psw.mask = IPL_PSW_MASK;
+    
+    if (!ipl->kernel) {
+        /* booting firmware, tell what device to boot from */
+        DeviceState *dev_st = get_boot_device(0);
+        VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast(
+                OBJECT(&(dev_st->parent_obj)), "virtio-blk-ccw");
+        
+        if (ccw_dev) {
+            env->regs[7] = ccw_dev->sch->cssid << 24 |
+                           ccw_dev->sch->ssid << 16 |
+                           ccw_dev->sch->devno;
+        } else {
+            env->regs[7] = -1;
+        }
+    }
+    
     s390_add_running_cpu(cpu);
 }