pc-bios/s390-ccw: add boot entry selection to El Torito routine

If there is no LOADPARM given or '0' specified, then IPL the first
matched entry. Otherwise IPL the matching entry of that number.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index e974350b6fdeb5f985a7b7535b055961d5c9c770..523fa78c5fa7bec0106e13be4bb5ddeb5140ba45 100644 (file)
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -655,6 +655,7 @@ static IsoBcSection *find_iso_bc_entry(void)
     IsoBcEntry *e = (IsoBcEntry *)sec;
     uint32_t offset = find_iso_bc();
     int i;
+    unsigned int loadparm = get_loadparm_index();
 
     if (!offset) {
         return NULL;
@@ -675,7 +676,11 @@ static IsoBcSection *find_iso_bc_entry(void)
     for (i = 1; i < ISO_BC_ENTRY_PER_SECTOR; i++) {
         if (e[i].id == ISO_BC_BOOTABLE_SECTION) {
             if (is_iso_bc_entry_compatible(&e[i].body.sect)) {
-                return &e[i].body.sect;
+                if (loadparm <= 1) {
+                    /* found, default, or unspecified */
+                    return &e[i].body.sect;
+                }
+                loadparm--;
             }
         }
     }