[4/6] S390: Add virtio-blk boot

Submitted by Alexander Graf on May 6, 2013, 3:30 p.m.

Details

Message ID 1367854224-2354-5-git-send-email-agraf@suse.de
State New
Headers show

Commit Message

Alexander Graf May 6, 2013, 3:30 p.m.
From: Dominik Dingel <dingel@linux.vnet.ibm.com>

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>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 hw/s390x/ipl.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

Patch hide | download patch | download mbox

diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index d14c548..0aeb003 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);
 }