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pc-bios/s390-ccw: Use the ccw bios to start the network boot

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We want to use the ccw bios to start final network boot. To do
this we use ccw bios to detect if the boot device is a virtio
network device and retrieve the start address of the
network boot image.

Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Farhan Ali 2016-11-01 17:34:00 -04:00 committed by Cornelia Huck
parent f38b5b7fc4
commit 99b72e0fbb
5 changed files with 25 additions and 8 deletions
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8
pc-bios/s390-ccw/bootmap.c
View File

@ -724,11 +724,17 @@ static void zipl_load_vscsi(void)
void zipl_load(void)
{
if (virtio_get_device()->is_cdrom) {
VDev *vdev = virtio_get_device();
if (vdev->is_cdrom) {
ipl_iso_el_torito();
panic("\n! Cannot IPL this ISO image !\n");
}
if (virtio_get_device_type() == VIRTIO_ID_NET) {
jump_to_IPL_code(vdev->netboot_start_addr);
}
ipl_scsi();
switch (virtio_get_device_type()) {

3
pc-bios/s390-ccw/iplb.h
View File

@ -13,7 +13,8 @@
#define IPLB_H
struct IplBlockCcw {
uint8_t reserved0[85];
uint64_t netboot_start_addr;
uint8_t reserved0[77];
uint8_t ssid;
uint16_t devno;
uint8_t vm_flags;

20
pc-bios/s390-ccw/main.c
View File

@ -53,6 +53,12 @@ static bool find_dev(Schib *schib, int dev_no)
if (!virtio_is_supported(blk_schid)) {
continue;
}
/* Skip net devices since no IPLB is created and therefore no
* no network bootloader has been loaded
*/
if (virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
}
if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
return true;
}
@ -67,6 +73,7 @@ static void virtio_setup(void)
int ssid;
bool found = false;
uint16_t dev_no;
VDev *vdev = virtio_get_device();
/*
* We unconditionally enable mss support. In every sane configuration,
@ -85,9 +92,6 @@ static void virtio_setup(void)
found = find_dev(&schib, dev_no);
break;
case S390_IPL_TYPE_QEMU_SCSI:
{
VDev *vdev = virtio_get_device();
vdev->scsi_device_selected = true;
vdev->selected_scsi_device.channel = iplb.scsi.channel;
vdev->selected_scsi_device.target = iplb.scsi.target;
@ -95,7 +99,6 @@ static void virtio_setup(void)
blk_schid.ssid = iplb.scsi.ssid & 0x3;
found = find_dev(&schib, iplb.scsi.devno);
break;
}
default:
panic("List-directed IPL not supported yet!\n");
}
@ -111,9 +114,14 @@ static void virtio_setup(void)
IPL_assert(found, "No virtio device found");
virtio_setup_device(blk_schid);
if (virtio_get_device_type() == VIRTIO_ID_NET) {
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = iplb.ccw.netboot_start_addr;
} else {
virtio_setup_device(blk_schid);
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
}
int main(void)

1
pc-bios/s390-ccw/virtio.c
View File

@ -585,6 +585,7 @@ bool virtio_is_supported(SubChannelId schid)
switch (vdev.senseid.cu_model) {
case VIRTIO_ID_BLOCK:
case VIRTIO_ID_SCSI:
case VIRTIO_ID_NET:
return true;
}
}

1
pc-bios/s390-ccw/virtio.h
View File

@ -276,6 +276,7 @@ struct VDev {
uint8_t scsi_dev_heads;
bool scsi_device_selected;
ScsiDevice selected_scsi_device;
uint64_t netboot_start_addr;
};
typedef struct VDev VDev;