Commit f7178910 authored by Collin L. Walling's avatar Collin L. Walling Committed by Thomas Huth
Browse files

s390-ccw: print zipl boot menu 



When the boot menu options are present and the guest's
disk has been configured by the zipl tool, then the user
will be presented with an interactive boot menu with
labeled entries. An example of what the menu might look
like:

zIPL v1.37.1-build-20170714 interactive boot menu.

0. default (linux-4.13.0)

  1. linux-4.13.0
  2. performance
  3. kvm

Signed-off-by: default avatarCollin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: default avatarThomas Huth <thuth@redhat.com>
Acked-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
parent ba831b25

pc-bios/s390-ccw/menu.c

+32 −1
Original line number Diff line number Diff line
@@ -15,11 +15,42 @@ 
static uint8_t flag;

static uint64_t timeout;



int menu_get_zipl_boot_index(const char *menu_data)

static int get_boot_index(int entries)

{

    return 0; /* implemented next patch */

}



static void zipl_println(const char *data, size_t len)

{

    char buf[len + 2];



    ebcdic_to_ascii(data, buf, len);

    buf[len] = '\n';

    buf[len + 1] = '\0';



    sclp_print(buf);

}



int menu_get_zipl_boot_index(const char *menu_data)

{

    size_t len;

    int entries;



    /* Print and count all menu items, including the banner */

    for (entries = 0; *menu_data; entries++) {

        len = strlen(menu_data);

        zipl_println(menu_data, len);

        menu_data += len + 1;



        if (entries < 2) {

            sclp_print("\n");

        }

    }



    sclp_print("\n");

    return get_boot_index(entries - 1); /* subtract 1 to exclude banner */

}



void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout)

{

    flag = boot_menu_flag;