s390/ipl: use load normal for LPAR re-ipl

Avoid clearing memory for CCW-type re-ipl within a logical
partition. This can save a significant amount of time if a logical
partition contains a lot of memory.

On the other hand we still clear memory if running within a second
level hypervisor, since the hypervisor can simply free all memory that
was used for the guest.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 44317398b77bbe8d1b095305286f8277d8a1e62c..b0dbf9a265f50ca3a03195d035391b744595f3fe 100644 (file)
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1085,7 +1085,10 @@ static void __reipl_run(void *unused)
                break;
        case REIPL_METHOD_CCW_DIAG:
                diag308(DIAG308_SET, reipl_block_ccw);
-               diag308(DIAG308_IPL, NULL);
+               if (MACHINE_IS_LPAR)
+                       diag308(DIAG308_DUMP, NULL);
+               else
+                       diag308(DIAG308_IPL, NULL);
                break;
        case REIPL_METHOD_FCP_RW_DIAG:
                diag308(DIAG308_SET, reipl_block_fcp);