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s390-bios: Factor finding boot device out of virtio code path 

Make a new routine find_boot_device to locate the boot device for all
cases, not just virtio.

The error message for the case where no boot device has been specified
and a suitable boot device cannot be auto detected was specific to
virtio devices. We update this message to remove virtio specific wording.

Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-12-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Jason J. Herne 2019-04-04 10:34:30 -04:00 committed by Thomas Huth
parent 930072d2bf
commit 7b361db37b
2 changed files with 47 additions and 40 deletions
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85
pc-bios/s390-ccw/main.c
View File

@ -58,17 +58,18 @@ unsigned int get_loadparm_index(void)
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
*/
static bool find_dev(Schib *schib, int dev_no)
static bool find_subch(int dev_no)
{
Schib schib;
int i, r;
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
r = stsch_err(blk_schid, schib);
r = stsch_err(blk_schid, &schib);
if ((r == 3) || (r == -EIO)) {
break;
}
if (!schib->pmcw.dnv) {
if (!schib.pmcw.dnv) {
continue;
}
@ -80,7 +81,7 @@ static bool find_dev(Schib *schib, int dev_no)
continue;
}
if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
if ((dev_no < 0) || (schib.pmcw.dev == dev_no)) {
return true;
}
}
@ -136,56 +137,61 @@ static void boot_setup(void)
have_iplb = store_iplb(&iplb);
}
static void find_boot_device(void)
{
VDev *vdev = virtio_get_device();
int ssid;
bool found;
if (!have_iplb) {
for (ssid = 0; ssid < 0x3; ssid++) {
blk_schid.ssid = ssid;
found = find_subch(-1);
if (found) {
return;
}
}
panic("Could not find a suitable boot device (none specified)\n");
}
switch (iplb.pbt) {
case S390_IPL_TYPE_CCW:
debug_print_int("device no. ", iplb.ccw.devno);
blk_schid.ssid = iplb.ccw.ssid & 0x3;
debug_print_int("ssid ", blk_schid.ssid);
found = find_subch(iplb.ccw.devno);
break;
case S390_IPL_TYPE_QEMU_SCSI:
vdev->scsi_device_selected = true;
vdev->selected_scsi_device.channel = iplb.scsi.channel;
vdev->selected_scsi_device.target = iplb.scsi.target;
vdev->selected_scsi_device.lun = iplb.scsi.lun;
blk_schid.ssid = iplb.scsi.ssid & 0x3;
found = find_subch(iplb.scsi.devno);
break;
default:
panic("List-directed IPL not supported yet!\n");
}
IPL_assert(found, "Boot device not found\n");
}
static void virtio_setup(void)
{
Schib schib;
int ssid;
bool found = false;
uint16_t dev_no;
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
if (have_iplb) {
switch (iplb.pbt) {
case S390_IPL_TYPE_CCW:
dev_no = iplb.ccw.devno;
debug_print_int("device no. ", dev_no);
blk_schid.ssid = iplb.ccw.ssid & 0x3;
debug_print_int("ssid ", blk_schid.ssid);
found = find_dev(&schib, dev_no);
break;
case S390_IPL_TYPE_QEMU_SCSI:
vdev->scsi_device_selected = true;
vdev->selected_scsi_device.channel = iplb.scsi.channel;
vdev->selected_scsi_device.target = iplb.scsi.target;
vdev->selected_scsi_device.lun = iplb.scsi.lun;
blk_schid.ssid = iplb.scsi.ssid & 0x3;
found = find_dev(&schib, iplb.scsi.devno);
break;
default:
panic("List-directed IPL not supported yet!\n");
}
menu_setup();
} else {
for (ssid = 0; ssid < 0x3; ssid++) {
blk_schid.ssid = ssid;
found = find_dev(&schib, -1);
if (found) {
break;
}
}
}
IPL_assert(found, "No virtio device found");
if (virtio_get_device_type() == VIRTIO_ID_NET) {
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = qipl.netboot_start_addr;
} else {
virtio_blk_setup_device(blk_schid);
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
}
@ -195,8 +201,9 @@ int main(void)
sclp_setup();
css_setup();
boot_setup();
virtio_setup();
find_boot_device();
virtio_setup();
zipl_load(); /* no return */
panic("Failed to load OS from hard disk\n");

2
tests/boot-serial-test.c
View File

@ -114,7 +114,7 @@ static testdef_t tests[] = {
{ "sparc", "SS-4", "", "MB86904" },
{ "sparc", "SS-600MP", "", "TMS390Z55" },
{ "sparc64", "sun4u", "", "UltraSPARC" },
{ "s390x", "s390-ccw-virtio", "", "virtio device" },
{ "s390x", "s390-ccw-virtio", "", "device" },
{ "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
{ "microblaze", "petalogix-s3adsp1800", "", "TT",
sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },