[Qemu-devel] [PATCH v2 for-2.7 05/20] s390x/ipl: Provide ipl parameter block

[Cornelia Huck]

From: Alexander Yarygin <address@hidden>

Right now we return the ipl parameter block only if the guest
specified one. Let's fill in the parameter block when bootindex
parameter is available and not booting from an external kernel.

Signed-off-by: Alexander Yarygin <address@hidden>
Reviewed-by: David Hildenbrand <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
---
 hw/s390x/ipl.c | 7 +++++++
 hw/s390x/ipl.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 236e2c9..9a73820 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -238,6 +238,12 @@ static uint64_t s390_update_iplstate(S390IPLState *ipl)
             ipl->cssid = ccw_dev->sch->cssid;
             ipl->ssid = ccw_dev->sch->ssid;
             ipl->devno = ccw_dev->sch->devno;
+            ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
+            ipl->iplb.blk0_len =
+                cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
+            ipl->iplb.pbt = S390_IPL_TYPE_CCW;
+            ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
+            ipl->iplb_valid = true;
             goto out;
         }
     }
@@ -292,6 +298,7 @@ static void s390_ipl_reset(DeviceState *dev)
 
     if (!ipl->reipl_requested) {
         ipl->iplb_valid = false;
+        memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
     }
     ipl->reipl_requested = false;
 }
diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h
index 08f1d5c..0b7f6cbe 100644
--- a/hw/s390x/ipl.h
+++ b/hw/s390x/ipl.h
@@ -102,6 +102,7 @@ typedef struct S390IPLState S390IPLState;
 #define S390_IPL_TYPE_FCP 0x00
 #define S390_IPL_TYPE_CCW 0x02
 
+#define S390_IPLB_HEADER_LEN 8
 #define S390_IPLB_MIN_CCW_LEN 200
 #define S390_IPLB_MIN_FCP_LEN 384
 
-- 
2.6.6