[Qemu-devel] [PATCH 03/11] hw/s390x/sclp: update LOADPARM in SCP Info

[Cornelia Huck]

From: Farhan Ali <address@hidden>

LOADPARM has two copies:
1. in SCP Information Block
2. in IPL Information Parameter Block

So, update SCLP intrinsics now. We always store LOADPARM in SCP
information block even if we don't have a valid IPL Information
Parameter Block.

Initial patch from Eugene (jno) Dvurechenski.

Signed-off-by: Eugene (jno) Dvurechenski <address@hidden>
Signed-off-by: Farhan Ali <address@hidden>
Reviewed-by: Christian Borntraeger <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
---
 hw/s390x/sclp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index e741da1141..b4f6dd58dd 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -23,6 +23,7 @@
 #include "hw/s390x/sclp.h"
 #include "hw/s390x/event-facility.h"
 #include "hw/s390x/s390-pci-bus.h"
+#include "hw/s390x/ipl.h"
 
 static inline SCLPDevice *get_sclp_device(void)
 {
@@ -57,6 +58,7 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
     int cpu_count = 0;
     int rnsize, rnmax;
     int slots = MIN(machine->ram_slots, s390_get_memslot_count(kvm_state));
+    IplParameterBlock *ipib = s390_ipl_get_iplb();
 
     CPU_FOREACH(cpu) {
         cpu_count++;
@@ -129,6 +131,13 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
         read_info->rnmax2 = cpu_to_be64(rnmax);
     }
 
+    if (ipib && ipib->flags & DIAG308_FLAGS_LP_VALID) {
+        memcpy(&read_info->loadparm, &ipib->loadparm,
+               sizeof(read_info->loadparm));
+    } else {
+        s390_ipl_set_loadparm(read_info->loadparm);
+    }
+
     sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
 }
 
-- 
2.11.0