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.
The absence of any boot options on the command line will flag
to later use the zipl boot loader values.
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>
---
hw/s390x/ipl.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
hw/s390x/ipl.h | 9 +++++++--
pc-bios/s390-ccw/iplb.h | 6 ++++--
3 files changed, 59 insertions(+), 4 deletions(-)
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 31565ce..c8109f5 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -23,6 +23,9 @@
#include "hw/s390x/ebcdic.h"
#include "ipl.h"
#include "qemu/error-report.h"
+#include "qemu/config-file.h"
+#include "qemu/cutils.h"
+#include "qemu/option.h"
#define KERN_IMAGE_START 0x010000UL
#define KERN_PARM_AREA 0x010480UL
@@ -219,6 +222,50 @@ static Property s390_ipl_properties[] = {
DEFINE_PROP_END_OF_LIST(),
};
+static void s390_ipl_set_boot_menu(IplParameterBlock *iplb)
+{
+ QemuOptsList *plist = qemu_find_opts("boot-opts");
+ QemuOpts *opts = QTAILQ_FIRST(&plist->head);
+ uint8_t *flags;
+ uint32_t *timeout;
+ const char *tmp;
+ unsigned long splash_time = 0;
+
+ switch (iplb->pbt) {
+ case S390_IPL_TYPE_CCW:
+ case S390_IPL_TYPE_QEMU_SCSI:
+ flags = &iplb->qipl.boot_menu_flags;
+ timeout = &iplb->qipl.boot_menu_timeout;
+ break;
+ default:
+ error_report("boot menu is not supported for this device type.");
+ return;
+ }
+
+ /* In the absence of -boot menu, use zipl parameters */
+ if (!qemu_opt_get(opts, "menu")) {
+ *flags = BOOT_MENU_FLAG_ZIPL_OPTS;
+ } else if (boot_menu) {
+ *flags = BOOT_MENU_FLAG_CMD_OPTS;
+
+ tmp = qemu_opt_get(opts, "splash-time");
+
+ if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
+ error_report("splash-time is invalid, forcing it to 0.");
+ splash_time = 0;
+ return;
+ }
+
+ if (splash_time > 0xffffffff) {
+ error_report("splash-time is too large, forcing it to max value.");
+ splash_time = 0xffffffff;
+ return;
+ }
+
+ *timeout = cpu_to_be32(splash_time);
+ }
+}
+
static bool s390_gen_initial_iplb(S390IPLState *ipl)
{
DeviceState *dev_st;
@@ -435,6 +482,7 @@ void s390_ipl_prepare_cpu(S390CPU *cpu)
}
ipl->iplb.qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
}
+ s390_ipl_set_boot_menu(&ipl->iplb);
s390_ipl_prepare_qipl(cpu);
}
diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h
index cab8a97..7c3cab8 100644
--- a/hw/s390x/ipl.h
+++ b/hw/s390x/ipl.h
@@ -60,10 +60,15 @@ typedef struct IplBlockQemuScsi IplBlockQemuScsi;
#define QIPL_ADDRESS 0xcc
+#define BOOT_MENU_FLAG_CMD_OPTS 0x80
+#define BOOT_MENU_FLAG_ZIPL_OPTS 0x40
+
struct QemuIplParameters {
- uint8_t reserved1[4];
+ uint8_t boot_menu_flags;
+ uint8_t reserved1;
+ uint32_t boot_menu_timeout;
uint64_t netboot_start_addr;
- uint8_t reserved2[16];
+ uint8_t reserved2[14];
} QEMU_PACKED;
typedef struct QemuIplParameters QemuIplParameters;
diff --git a/pc-bios/s390-ccw/iplb.h b/pc-bios/s390-ccw/iplb.h
index 1266884..e8e442d 100644
--- a/pc-bios/s390-ccw/iplb.h
+++ b/pc-bios/s390-ccw/iplb.h
@@ -75,9 +75,11 @@ extern IplParameterBlock iplb
__attribute__((__aligned__(PAGE_SIZE)));
#define QIPL_ADDRESS 0xcc
struct QemuIplParameters {
- uint8_t reserved1[4];
+ uint8_t boot_menu_flags;
+ uint8_t reserved1;
+ uint32_t boot_menu_timeout;
uint64_t netboot_start_addr;
- uint8_t reserved2[16];
+ uint8_t reserved2[14];
} __attribute__ ((packed));
typedef struct QemuIplParameters QemuIplParameters;
--
2.7.4
