From f09f2f12133073d6ccab3b2bd95717d435adc442 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Fri, 8 Jul 2022 12:29:50 +0200 Subject: [PATCH 31/37] pc-bios/s390-ccw/virtio-blkdev: Simplify/fix virtio_ipl_disk_is_valid() RH-Author: Thomas Huth RH-MergeRequest: 198: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry RH-Commit: [3/9] ca0b836a417ce5bbd26e489551f573d6b2fc9e94 RH-Bugzilla: 2098076 RH-Acked-by: Miroslav Rezanina RH-Acked-by: David Hildenbrand RH-Acked-by: Cornelia Huck Bugzilla: http://bugzilla.redhat.com/2098076 commit bbf615f7b707f009ef8e757d170902ad33b90644 Author: Thomas Huth Date: Mon Jul 4 13:18:55 2022 +0200 pc-bios/s390-ccw/virtio-blkdev: Simplify/fix virtio_ipl_disk_is_valid() The s390-ccw bios fails to boot if the boot disk is a virtio-blk disk with a sector size of 4096. For example: dasdfmt -b 4096 -d cdl -y -p -M quick /dev/dasdX fdasd -a /dev/dasdX install a guest onto /dev/dasdX1 using virtio-blk qemu-system-s390x -nographic -hda /dev/dasdX1 The bios then bails out with: ! Cannot read block 0 ! Looking at virtio_ipl_disk_is_valid() and especially the function virtio_disk_is_scsi(), it does not really make sense that we expect only such a limited disk geometry (like a block size of 512) for our boot disks. Let's relax the check and allow everything that remotely looks like a sane disk. Message-Id: <20220704111903.62400-5-thuth@redhat.com> Reviewed-by: Eric Farman Signed-off-by: Thomas Huth Signed-off-by: Thomas Huth --- pc-bios/s390-ccw/virtio-blkdev.c | 41 ++++++-------------------------- pc-bios/s390-ccw/virtio.h | 2 -- 2 files changed, 7 insertions(+), 36 deletions(-) diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c index 6483307630..7e13155589 100644 --- a/pc-bios/s390-ccw/virtio-blkdev.c +++ b/pc-bios/s390-ccw/virtio-blkdev.c @@ -166,46 +166,19 @@ void virtio_assume_eckd(void) virtio_eckd_sectors_for_block_size(vdev->config.blk.blk_size); } -bool virtio_disk_is_scsi(void) -{ - VDev *vdev = virtio_get_device(); - - if (vdev->guessed_disk_nature == VIRTIO_GDN_SCSI) { - return true; - } - switch (vdev->senseid.cu_model) { - case VIRTIO_ID_BLOCK: - return (vdev->config.blk.geometry.heads == 255) - && (vdev->config.blk.geometry.sectors == 63) - && (virtio_get_block_size() == VIRTIO_SCSI_BLOCK_SIZE); - case VIRTIO_ID_SCSI: - return true; - } - return false; -} - -bool virtio_disk_is_eckd(void) +bool virtio_ipl_disk_is_valid(void) { + int blksize = virtio_get_block_size(); VDev *vdev = virtio_get_device(); - const int block_size = virtio_get_block_size(); - if (vdev->guessed_disk_nature == VIRTIO_GDN_DASD) { + if (vdev->guessed_disk_nature == VIRTIO_GDN_SCSI || + vdev->guessed_disk_nature == VIRTIO_GDN_DASD) { return true; } - switch (vdev->senseid.cu_model) { - case VIRTIO_ID_BLOCK: - return (vdev->config.blk.geometry.heads == 15) - && (vdev->config.blk.geometry.sectors == - virtio_eckd_sectors_for_block_size(block_size)); - case VIRTIO_ID_SCSI: - return false; - } - return false; -} -bool virtio_ipl_disk_is_valid(void) -{ - return virtio_disk_is_scsi() || virtio_disk_is_eckd(); + return (vdev->senseid.cu_model == VIRTIO_ID_BLOCK || + vdev->senseid.cu_model == VIRTIO_ID_SCSI) && + blksize >= 512 && blksize <= 4096; } int virtio_get_block_size(void) diff --git a/pc-bios/s390-ccw/virtio.h b/pc-bios/s390-ccw/virtio.h index 9e410bde6f..241730effe 100644 --- a/pc-bios/s390-ccw/virtio.h +++ b/pc-bios/s390-ccw/virtio.h @@ -186,8 +186,6 @@ void virtio_assume_scsi(void); void virtio_assume_eckd(void); void virtio_assume_iso9660(void); -extern bool virtio_disk_is_scsi(void); -extern bool virtio_disk_is_eckd(void); extern bool virtio_ipl_disk_is_valid(void); extern int virtio_get_block_size(void); extern uint8_t virtio_get_heads(void); -- 2.35.3