diff options
Diffstat (limited to 'pc-bios')
| -rw-r--r-- | pc-bios/s390-ccw/virtio.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c index 04977e4..6ed3dc9 100644 --- a/pc-bios/s390-ccw/virtio.c +++ b/pc-bios/s390-ccw/virtio.c @@ -299,14 +299,35 @@ bool virtio_disk_is_scsi(void) && (virtio_get_block_size() == 512); } +/* + * Other supported value pairs, if any, would need to be added here. + * Note: head count is always 15. + */ +static inline u8 virtio_eckd_sectors_for_block_size(int size) +{ + switch (size) { + case 512: + return 49; + case 1024: + return 33; + case 2048: + return 21; + case 4096: + return 12; + } + return 0; +} + bool virtio_disk_is_eckd(void) { + const int block_size = virtio_get_block_size(); + if (guessed_disk_nature) { - return (virtio_get_block_size() == 4096); + return (block_size == 4096); } return (blk_cfg.geometry.heads == 15) - && (blk_cfg.geometry.sectors == 12) - && (virtio_get_block_size() == 4096); + && (blk_cfg.geometry.sectors == + virtio_eckd_sectors_for_block_size(block_size)); } bool virtio_ipl_disk_is_valid(void) |