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Herne" , Thomas Huth , Janosch Frank , qemu-block@nongnu.org, Cornelia Huck , Collin Walling , Christian Borntraeger , Claudio Imbrenda Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" In case the user did not specify a boot device, we want to continue looking for other devices if there are no valid SCSI disks on a virtio- scsi controller. As a first step, do not panic in this case and let the control flow carry the error to the upper functions instead. Signed-off-by: Thomas Huth Reviewed-by: Cornelia Huck --- pc-bios/s390-ccw/main.c | 14 ++++++++++---- pc-bios/s390-ccw/s390-ccw.h | 2 +- pc-bios/s390-ccw/virtio-blkdev.c | 7 +++++-- pc-bios/s390-ccw/virtio-scsi.c | 28 ++++++++++++++++++++-------- pc-bios/s390-ccw/virtio-scsi.h | 2 +- 5 files changed, 37 insertions(+), 16 deletions(-) diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c index 0d2aabbc58..7bdd12ab2e 100644 --- a/pc-bios/s390-ccw/main.c +++ b/pc-bios/s390-ccw/main.c @@ -218,7 +218,7 @@ static void find_boot_device(void) IPL_assert(found, "Boot device not found\n"); } =20 -static void virtio_setup(void) +static int virtio_setup(void) { VDev *vdev =3D virtio_get_device(); QemuIplParameters *early_qipl =3D (QemuIplParameters *)QIPL_ADDRESS; @@ -233,9 +233,14 @@ static void virtio_setup(void) sclp_print("Network boot device detected\n"); vdev->netboot_start_addr =3D qipl.netboot_start_addr; } else { - virtio_blk_setup_device(blk_schid); + int ret =3D virtio_blk_setup_device(blk_schid); + if (ret) { + return ret; + } IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detect= ed"); } + + return 0; } =20 static void ipl_boot_device(void) @@ -246,8 +251,9 @@ static void ipl_boot_device(void) dasd_ipl(blk_schid, cutype); /* no return */ break; case CU_TYPE_VIRTIO: - virtio_setup(); - zipl_load(); /* no return */ + if (virtio_setup() =3D=3D 0) { + zipl_load(); /* no return */ + } break; default: print_int("Attempting to boot from unexpected device type", cutype= ); diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h index dbc4c64851..9b86c120b4 100644 --- a/pc-bios/s390-ccw/s390-ccw.h +++ b/pc-bios/s390-ccw/s390-ccw.h @@ -69,7 +69,7 @@ int sclp_read(char *str, size_t count); unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, ulong subchan_id, void *load_addr); bool virtio_is_supported(SubChannelId schid); -void virtio_blk_setup_device(SubChannelId schid); +int virtio_blk_setup_device(SubChannelId schid); int virtio_read(ulong sector, void *load_addr); =20 /* bootmap.c */ diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blk= dev.c index 11c56261ca..7d35050292 100644 --- a/pc-bios/s390-ccw/virtio-blkdev.c +++ b/pc-bios/s390-ccw/virtio-blkdev.c @@ -263,9 +263,10 @@ uint64_t virtio_get_blocks(void) return 0; } =20 -void virtio_blk_setup_device(SubChannelId schid) +int virtio_blk_setup_device(SubChannelId schid) { VDev *vdev =3D virtio_get_device(); + int ret =3D 0; =20 vdev->schid =3D schid; virtio_setup_ccw(vdev); @@ -288,9 +289,11 @@ void virtio_blk_setup_device(SubChannelId schid) "Config: CDB size mismatch"); =20 sclp_print("Using virtio-scsi.\n"); - virtio_scsi_setup(vdev); + ret =3D virtio_scsi_setup(vdev); break; default: panic("\n! No IPL device available !\n"); } + + return ret; } diff --git a/pc-bios/s390-ccw/virtio-scsi.c b/pc-bios/s390-ccw/virtio-scsi.c index eddfb8a7ad..2c8d0f3097 100644 --- a/pc-bios/s390-ccw/virtio-scsi.c +++ b/pc-bios/s390-ccw/virtio-scsi.c @@ -194,7 +194,12 @@ static bool scsi_read_capacity(VDev *vdev, =20 /* virtio-scsi routines */ =20 -static void virtio_scsi_locate_device(VDev *vdev) +/* + * Tries to locate a SCSI device and and adds the information for the found + * device to the vdev->scsi_device structure. + * Returns 0 if SCSI device could be located, or a error code < 0 otherwise + */ +static int virtio_scsi_locate_device(VDev *vdev) { const uint16_t channel =3D 0; /* again, it's what QEMU does */ uint16_t target; @@ -220,7 +225,7 @@ static void virtio_scsi_locate_device(VDev *vdev) IPL_check(sdev->channel =3D=3D 0, "non-zero channel requested"); IPL_check(sdev->target <=3D vdev->config.scsi.max_target, "target#= high"); IPL_check(sdev->lun <=3D vdev->config.scsi.max_lun, "LUN# high"); - return; + return 0; } =20 for (target =3D 0; target <=3D vdev->config.scsi.max_target; target++)= { @@ -247,18 +252,20 @@ static void virtio_scsi_locate_device(VDev *vdev) */ sdev->lun =3D r->lun[0].v16[0]; /* it's returned this way */ debug_print_int("Have to use LUN", sdev->lun); - return; /* we have to use this device */ + return 0; /* we have to use this device */ } for (i =3D 0; i < luns; i++) { if (r->lun[i].v64) { /* Look for non-zero LUN - we have where to choose from */ sdev->lun =3D r->lun[i].v16[0]; debug_print_int("Will use LUN", sdev->lun); - return; /* we have found a device */ + return 0; /* we have found a device */ } } } - panic("\n! Cannot locate virtio-scsi device !\n"); + + sclp_print("Warning: Could not locate a usable virtio-scsi device\n"); + return -ENODEV; } =20 int virtio_scsi_read_many(VDev *vdev, @@ -322,17 +329,20 @@ static void scsi_parse_capacity_report(void *data, } } =20 -void virtio_scsi_setup(VDev *vdev) +int virtio_scsi_setup(VDev *vdev) { int retry_test_unit_ready =3D 3; uint8_t data[256]; uint32_t data_size =3D sizeof(data); ScsiInquiryEvpdPages *evpd =3D &scsi_inquiry_evpd_pages_response; ScsiInquiryEvpdBl *evpd_bl =3D &scsi_inquiry_evpd_bl_response; - int i; + int i, ret; =20 vdev->scsi_device =3D &default_scsi_device; - virtio_scsi_locate_device(vdev); + ret =3D virtio_scsi_locate_device(vdev); + if (ret < 0) { + return ret; + } =20 /* We have to "ping" the device before it becomes readable */ while (!scsi_test_unit_ready(vdev)) { @@ -417,4 +427,6 @@ void virtio_scsi_setup(VDev *vdev) } scsi_parse_capacity_report(data, &vdev->scsi_last_block, (uint32_t *) &vdev->scsi_block_size); + + return 0; } diff --git a/pc-bios/s390-ccw/virtio-scsi.h b/pc-bios/s390-ccw/virtio-scsi.h index 4c4f4bbc31..4b14c2c2f9 100644 --- a/pc-bios/s390-ccw/virtio-scsi.h +++ b/pc-bios/s390-ccw/virtio-scsi.h @@ -67,7 +67,7 @@ static inline bool virtio_scsi_response_ok(const VirtioSc= siCmdResp *r) return r->response =3D=3D VIRTIO_SCSI_S_OK && r->status =3D=3D CDB= _STATUS_GOOD; } =20 -void virtio_scsi_setup(VDev *vdev); +int virtio_scsi_setup(VDev *vdev); int virtio_scsi_read_many(VDev *vdev, ulong sector, void *load_addr, int sec_num); =20 --=20 2.18.1