aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAlexander Yarygin <yarygin@linux.vnet.ibm.com>2015-09-22 12:58:09 +0300
committerCornelia Huck <cornelia.huck@de.ibm.com>2016-05-17 15:50:29 +0200
commit010d45d279067f66caecccf178a3c58e3e73cb5a (patch)
treea7b067786e91f932c8ecdf227c79622ac013d8c1
parenta388ac74dee9fe3bed24dc96041f51caf615ec52 (diff)
s390x/ipl: Remove redundant usage of gr7
We don't need to pass device address for pc-bios using gr7 anymore as the pcbios completely relies on diag308 now, so we can remove it from qemu. devno, ssid and cssid are migrated but the value was never reused, so we can safely ignore these fields and migrate 0. Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
-rw-r--r--hw/s390x/ipl.c33
1 files changed, 6 insertions, 27 deletions
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 2da0f1eaef..5786b5e451 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -208,50 +208,27 @@ static Property s390_ipl_properties[] = {
DEFINE_PROP_END_OF_LIST(),
};
-/*
- * In addition to updating the iplstate, this function returns:
- * - 0 if system was ipled with external kernel
- * - -1 if no valid boot device was found
- * - ccw id of the boot device otherwise
- */
-static uint64_t s390_update_iplstate(S390IPLState *ipl)
+static bool s390_gen_initial_iplb(S390IPLState *ipl)
{
DeviceState *dev_st;
- if (ipl->iplb_valid) {
- ipl->cssid = 0;
- ipl->ssid = 0;
- ipl->devno = ipl->iplb.devno;
- goto out;
- }
-
- if (ipl->kernel) {
- return 0;
- }
-
dev_st = get_boot_device(0);
if (dev_st) {
VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast(
OBJECT(qdev_get_parent_bus(dev_st)->parent),
TYPE_VIRTIO_CCW_DEVICE);
if (ccw_dev) {
- ipl->cssid = ccw_dev->sch->cssid;
- ipl->ssid = ccw_dev->sch->ssid;
- ipl->devno = ccw_dev->sch->devno;
ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
ipl->iplb.blk0_len =
cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
ipl->iplb.pbt = S390_IPL_TYPE_CCW;
ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
- ipl->iplb_valid = true;
- goto out;
+ return true;
}
}
- return -1;
-out:
- return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno);
+ return false;
}
void s390_ipl_update_diag308(IplParameterBlock *iplb)
@@ -289,7 +266,9 @@ void s390_ipl_prepare_cpu(S390CPU *cpu)
if (!ipl->kernel || ipl->iplb_valid) {
cpu->env.psw.addr = ipl->bios_start_addr;
- cpu->env.regs[7] = s390_update_iplstate(ipl);
+ if (!ipl->iplb_valid) {
+ ipl->iplb_valid = s390_gen_initial_iplb(ipl);
+ }
}
}