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From 6f44767aeda52048e7c9ee4b5fcc30353c71cbc1 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 9 Oct 2020 10:08:45 -0400
Subject: [PATCH 09/14] pc-bios/s390-ccw: Do not bail out early if not finding
a SCSI disk
RH-Author: Thomas Huth <thuth@redhat.com>
Message-id: <20201009100849.264994-6-thuth@redhat.com>
Patchwork-id: 98599
O-Subject: [RHEL-8.4.0 qemu-kvm PATCH 5/9] pc-bios/s390-ccw: Do not bail out early if not finding a SCSI disk
Bugzilla: 1846975
RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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.
Message-Id: <20200806105349.632-6-thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 605751b5a5334e187761b0b8a8266a216897bf70)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
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 d6fd218074..456733fbee 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -227,7 +227,7 @@ static void find_boot_device(void)
IPL_assert(found, "Boot device not found\n");
}
-static void virtio_setup(void)
+static int virtio_setup(void)
{
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
@@ -242,9 +242,14 @@ static void virtio_setup(void)
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = qipl.netboot_start_addr;
} else {
- virtio_blk_setup_device(blk_schid);
+ int ret = virtio_blk_setup_device(blk_schid);
+ if (ret) {
+ return ret;
+ }
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
+
+ return 0;
}
static void ipl_boot_device(void)
@@ -255,8 +260,9 @@ 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() == 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 ae432c40b8..e7cf36eb91 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -70,7 +70,7 @@ 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);
u64 get_clock(void);
ulong get_second(void);
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.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;
}
-void virtio_blk_setup_device(SubChannelId schid)
+int virtio_blk_setup_device(SubChannelId schid)
{
VDev *vdev = virtio_get_device();
+ int ret = 0;
vdev->schid = schid;
virtio_setup_ccw(vdev);
@@ -288,9 +289,11 @@ void virtio_blk_setup_device(SubChannelId schid)
"Config: CDB size mismatch");
sclp_print("Using virtio-scsi.\n");
- virtio_scsi_setup(vdev);
+ ret = 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 4fe4b9d261..88691edb89 100644
--- a/pc-bios/s390-ccw/virtio-scsi.c
+++ b/pc-bios/s390-ccw/virtio-scsi.c
@@ -192,7 +192,12 @@ static bool scsi_read_capacity(VDev *vdev,
/* virtio-scsi routines */
-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 = 0; /* again, it's what QEMU does */
uint16_t target;
@@ -218,7 +223,7 @@ static void virtio_scsi_locate_device(VDev *vdev)
IPL_check(sdev->channel == 0, "non-zero channel requested");
IPL_check(sdev->target <= vdev->config.scsi.max_target, "target# high");
IPL_check(sdev->lun <= vdev->config.scsi.max_lun, "LUN# high");
- return;
+ return 0;
}
for (target = 0; target <= vdev->config.scsi.max_target; target++) {
@@ -245,18 +250,20 @@ static void virtio_scsi_locate_device(VDev *vdev)
*/
sdev->lun = 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 = 0; i < luns; i++) {
if (r->lun[i].v64) {
/* Look for non-zero LUN - we have where to choose from */
sdev->lun = 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;
}
int virtio_scsi_read_many(VDev *vdev,
@@ -320,17 +327,20 @@ static void scsi_parse_capacity_report(void *data,
}
}
-void virtio_scsi_setup(VDev *vdev)
+int virtio_scsi_setup(VDev *vdev)
{
int retry_test_unit_ready = 3;
uint8_t data[256];
uint32_t data_size = sizeof(data);
ScsiInquiryEvpdPages *evpd = &scsi_inquiry_evpd_pages_response;
ScsiInquiryEvpdBl *evpd_bl = &scsi_inquiry_evpd_bl_response;
- int i;
+ int i, ret;
vdev->scsi_device = &default_scsi_device;
- virtio_scsi_locate_device(vdev);
+ ret = virtio_scsi_locate_device(vdev);
+ if (ret < 0) {
+ return ret;
+ }
/* We have to "ping" the device before it becomes readable */
while (!scsi_test_unit_ready(vdev)) {
@@ -415,4 +425,6 @@ 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 VirtioScsiCmdResp *r)
return r->response == VIRTIO_SCSI_S_OK && r->status == CDB_STATUS_GOOD;
}
-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);
--
2.27.0
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