[Qemu-devel] [PATCH v4 10/10] s390-ccw: interactive boot menu for scsi

["Collin L. Walling" <walling@linux.vnet.ibm.com>]

Interactive boot menu for scsi. This follows a similar procedure
as the interactive menu for eckd dasd. An example follows:

    s390x Enumerated Boot Menu.

    3 entries detected. Select from index 0 to 2.

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
 pc-bios/s390-ccw/bootmap.c |  9 +++++++++
 pc-bios/s390-ccw/main.c    |  3 +++
 pc-bios/s390-ccw/menu.c    | 14 ++++++++++++++
 pc-bios/s390-ccw/menu.h    |  1 +
 4 files changed, 27 insertions(+)

diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 7d7e0c5..87bf6ba 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -537,6 +537,7 @@ static void ipl_scsi(void)
     ScsiMbr *mbr = (void *)sec;
     BootMapTable *bmt = (void *)sec;
     unsigned int loadparm = get_loadparm_index();
+    int entries = 0;
 
     /* Grab the MBR */
     memset(sec, FREE_SPACE_FILLER, sizeof(sec));
@@ -558,6 +559,14 @@ static void ipl_scsi(void)
 
     IPL_assert(magic_match(sec, ZIPL_MAGIC), "No zIPL magic in PT");
 
+    if (menu_check_flags(BOOT_MENU_FLAG_BOOT_OPTS)) {
+        while (bmt->bte[entries].scsi.blockno) {
+            entries++;
+        }
+        debug_print_int("program table entries", entries);
+        loadparm = menu_get_enum_boot_index(entries);
+    }
+
     debug_print_int("loadparm index", loadparm);
 
     zipl_run(&bmt->bte[loadparm].scsi); /* no return */
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 709e5ef..808d111 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -90,6 +90,9 @@ static void menu_setup(void)
     case S390_IPL_TYPE_CCW:
         menu_set_parms(iplb.ccw.boot_menu_flags, iplb.ccw.boot_menu_timeout);
         return;
+    case S390_IPL_TYPE_QEMU_SCSI:
+        menu_set_parms(iplb.scsi.boot_menu_flags, iplb.scsi.boot_menu_timeout);
+        return;
     }
 }
 
diff --git a/pc-bios/s390-ccw/menu.c b/pc-bios/s390-ccw/menu.c
index 24d4bba..9e54346 100644
--- a/pc-bios/s390-ccw/menu.c
+++ b/pc-bios/s390-ccw/menu.c
@@ -214,6 +214,20 @@ int menu_get_zipl_boot_index(const void *stage2, int offset)
     return get_boot_index(ct - 1);
 }
 
+int menu_get_enum_boot_index(int entries)
+{
+    char tmp[4];
+
+    sclp_print("s390x Enumerated Boot Menu.\n\n");
+
+    sclp_print(itostr(entries, tmp, sizeof(tmp)));
+    sclp_print(" entries detected. Select from boot index 0 to ");
+    sclp_print(itostr(entries - 1, tmp, sizeof(tmp)));
+    sclp_print(".\n\n");
+
+    return get_boot_index(entries);
+}
+
 void menu_set_parms(uint8_t boot_menu_flag, uint16_t boot_menu_timeout)
 {
     flags = boot_menu_flag;
diff --git a/pc-bios/s390-ccw/menu.h b/pc-bios/s390-ccw/menu.h
index f4a1068..e6788f2 100644
--- a/pc-bios/s390-ccw/menu.h
+++ b/pc-bios/s390-ccw/menu.h
@@ -18,6 +18,7 @@
 #define BOOT_MENU_FLAG_ZIPL_OPTS 0x40
 
 int menu_get_zipl_boot_index(const void *stage2, int offset);
+int menu_get_enum_boot_index(int entries);
 void menu_set_parms(uint8_t boot_menu_flags, uint16_t boot_menu_timeout);
 bool menu_check_flags(uint8_t check_flags);
 
-- 
2.7.4