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[Qemu-devel] [PATCH v4 08/10] s390-ccw: print zipl boot menu
From: |
Collin L. Walling |
Subject: |
[Qemu-devel] [PATCH v4 08/10] s390-ccw: print zipl boot menu |
Date: |
Tue, 23 Jan 2018 13:26:51 -0500 |
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: Collin L. Walling <address@hidden>
---
pc-bios/s390-ccw/menu.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)
diff --git a/pc-bios/s390-ccw/menu.c b/pc-bios/s390-ccw/menu.c
index de12c73..174285e 100644
--- a/pc-bios/s390-ccw/menu.c
+++ b/pc-bios/s390-ccw/menu.c
@@ -10,13 +10,62 @@
*/
#include "menu.h"
+#include "s390-ccw.h"
static uint8_t flags;
static uint64_t timeout;
+/* Offsets from zipl fields to zipl banner start */
+#define ZIPL_TIMEOUT_OFFSET 138
+#define ZIPL_FLAG_OFFSET 140
+
+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 void *stage2, int offset)
{
- return 0; /* implemented next patch */
+ const char *data = stage2 + offset;
+ uint16_t flag;
+ size_t len;
+ int ct;
+
+ flag = *(uint16_t *)(data - ZIPL_FLAG_OFFSET);
+
+ if (flags & BOOT_MENU_FLAG_ZIPL_OPTS) {
+ if (flag) {
+ timeout = *(uint16_t *)(data - ZIPL_TIMEOUT_OFFSET);
+ } else {
+ return 0; /* Boot default */
+ }
+ }
+
+ /* Print and count all menu items, including the banner */
+ for (ct = 0; *data; ct++) {
+ len = strlen(data);
+ zipl_println(data, len);
+ data += len + 1;
+
+ if (ct < 2) {
+ sclp_print("\n");
+ }
+ }
+
+ sclp_print("\n");
+
+ return get_boot_index(ct - 1);
}
void menu_set_parms(uint8_t boot_menu_flag, uint16_t boot_menu_timeout)
--
2.7.4
- Re: [Qemu-devel] [qemu-s390x] [PATCH v4 04/10] s390-ccw: update libc, (continued)
[Qemu-devel] [PATCH v4 06/10] s390-ccw: set up interactive boot menu parameters, Collin L. Walling, 2018/01/23
[Qemu-devel] [PATCH v4 07/10] s390-ccw: read stage2 boot loader data to find menu, Collin L. Walling, 2018/01/23
[Qemu-devel] [PATCH v4 05/10] s390-ccw: parse and set boot menu options, Collin L. Walling, 2018/01/23
[Qemu-devel] [PATCH v4 08/10] s390-ccw: print zipl boot menu,
Collin L. Walling <=
[Qemu-devel] [PATCH v4 10/10] s390-ccw: interactive boot menu for scsi, Collin L. Walling, 2018/01/23
[Qemu-devel] [PATCH v4 09/10] s390-ccw: read user input for boot index via the SCLP console, Collin L. Walling, 2018/01/23