On 02/26/2018 01:48 PM, Cornelia Huck wrote:
On Mon, 26 Feb 2018 11:42:29 +0100
Thomas Huth <th...@redhat.com> wrote:

From: "Collin L. Walling" <wall...@linux.vnet.ibm.com>

Set boot menu options for an s390 guest and store them in
the iplb. These options are set via the QEMU command line
option:

     -boot menu=on|off[,splash-time=X]

or via the libvirt domain xml:

     <os>
       <bootmenu enable='yes|no' timeout='X'/>
     </os>

Where X represents some positive integer representing
milliseconds.

Any value set for loadparm will override all boot menu options.
If loadparm=PROMPT, then the menu will be enabled without a
timeout.

Signed-off-by: Collin L. Walling <wall...@linux.vnet.ibm.com>
Reviewed-by: Janosch Frank <fran...@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <th...@redhat.com>
Signed-off-by: Thomas Huth <th...@redhat.com>
---
  hw/s390x/ipl.c          | 52 +++++++++++++++++++++++++++++++++++++++++++++++++
  hw/s390x/ipl.h          |  9 +++++++--
  pc-bios/s390-ccw/iplb.h |  9 +++++++--
Updating the header, but it is not consumed in the bios?

  3 files changed, 66 insertions(+), 4 deletions(-)
+static void s390_ipl_set_boot_menu(S390IPLState *ipl)
+{
+    QemuOptsList *plist = qemu_find_opts("boot-opts");
+    QemuOpts *opts = QTAILQ_FIRST(&plist->head);
+    uint8_t *flags = &ipl->qipl.qipl_flags;
+    uint32_t *timeout = &ipl->qipl.boot_menu_timeout;
+    const char *tmp;
+    unsigned long splash_time = 0;
+
+    if (!get_boot_device(0)) {
+        if (boot_menu) {
+            error_report("boot menu requires a bootindex to be specified for "
+                         "the IPL device.");
+        }
+        return;
+    }
+
+    switch (ipl->iplb.pbt) {
+    case S390_IPL_TYPE_CCW:
+        break;
+    default:
+        error_report("boot menu is not supported for this device type.");
If I specify both a bootindex for a device and a -kernel parameter, I
get this error message. Looks a tad odd, but not sure how to avoid it.

Hmm... perhaps an additional check if no IPLB, then skip trying to set
any boot menu data?

[...]


--
- Collin L Walling


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