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qemu-kvm/SOURCES/kvm-s390-bios-Factor-finding-boot-device-out-of-virtio-c.patch

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From e9b154b1297ac5aff8737dde61b6793fcd7c0a69 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Mon, 14 Oct 2019 10:06:40 +0100
Subject: [PATCH 15/21] s390-bios: Factor finding boot device out of virtio
code path
RH-Author: Thomas Huth <thuth@redhat.com>
Message-id: <20191014100645.22862-13-thuth@redhat.com>
Patchwork-id: 91789
O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 12/17] s390-bios: Factor finding boot device out of virtio code path
Bugzilla: 1664376
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Make a new routine find_boot_device to locate the boot device for all
cases, not just virtio.
The error message for the case where no boot device has been specified
and a suitable boot device cannot be auto detected was specific to
virtio devices. We update this message to remove virtio specific wording.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-12-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 7b361db37b18a75860decc0a85e0194936401d66)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
Conflicts:
tests/boot-serial-test.c
(we're missing commit 052888f043ba in downstream)
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
pc-bios/s390-ccw/main.c | 85 ++++++++++++++++++++++++++----------------------
tests/boot-serial-test.c | 2 +-
2 files changed, 47 insertions(+), 40 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index d04ea89..d3a161c 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -58,17 +58,18 @@ unsigned int get_loadparm_index(void)
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
*/
-static bool find_dev(Schib *schib, int dev_no)
+static bool find_subch(int dev_no)
{
+ Schib schib;
int i, r;
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
- r = stsch_err(blk_schid, schib);
+ r = stsch_err(blk_schid, &schib);
if ((r == 3) || (r == -EIO)) {
break;
}
- if (!schib->pmcw.dnv) {
+ if (!schib.pmcw.dnv) {
continue;
}
@@ -80,7 +81,7 @@ static bool find_dev(Schib *schib, int dev_no)
continue;
}
- if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
+ if ((dev_no < 0) || (schib.pmcw.dev == dev_no)) {
return true;
}
}
@@ -136,56 +137,61 @@ static void boot_setup(void)
have_iplb = store_iplb(&iplb);
}
-static void virtio_setup(void)
+static void find_boot_device(void)
{
- Schib schib;
- int ssid;
- bool found = false;
- uint16_t dev_no;
VDev *vdev = virtio_get_device();
- QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
-
- memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
+ int ssid;
+ bool found;
- if (have_iplb) {
- switch (iplb.pbt) {
- case S390_IPL_TYPE_CCW:
- dev_no = iplb.ccw.devno;
- debug_print_int("device no. ", dev_no);
- blk_schid.ssid = iplb.ccw.ssid & 0x3;
- debug_print_int("ssid ", blk_schid.ssid);
- found = find_dev(&schib, dev_no);
- break;
- case S390_IPL_TYPE_QEMU_SCSI:
- vdev->scsi_device_selected = true;
- vdev->selected_scsi_device.channel = iplb.scsi.channel;
- vdev->selected_scsi_device.target = iplb.scsi.target;
- vdev->selected_scsi_device.lun = iplb.scsi.lun;
- blk_schid.ssid = iplb.scsi.ssid & 0x3;
- found = find_dev(&schib, iplb.scsi.devno);
- break;
- default:
- panic("List-directed IPL not supported yet!\n");
- }
- menu_setup();
- } else {
+ if (!have_iplb) {
for (ssid = 0; ssid < 0x3; ssid++) {
blk_schid.ssid = ssid;
- found = find_dev(&schib, -1);
+ found = find_subch(-1);
if (found) {
- break;
+ return;
}
}
+ panic("Could not find a suitable boot device (none specified)\n");
+ }
+
+ switch (iplb.pbt) {
+ case S390_IPL_TYPE_CCW:
+ debug_print_int("device no. ", iplb.ccw.devno);
+ blk_schid.ssid = iplb.ccw.ssid & 0x3;
+ debug_print_int("ssid ", blk_schid.ssid);
+ found = find_subch(iplb.ccw.devno);
+ break;
+ case S390_IPL_TYPE_QEMU_SCSI:
+ vdev->scsi_device_selected = true;
+ vdev->selected_scsi_device.channel = iplb.scsi.channel;
+ vdev->selected_scsi_device.target = iplb.scsi.target;
+ vdev->selected_scsi_device.lun = iplb.scsi.lun;
+ blk_schid.ssid = iplb.scsi.ssid & 0x3;
+ found = find_subch(iplb.scsi.devno);
+ break;
+ default:
+ panic("List-directed IPL not supported yet!\n");
}
- IPL_assert(found, "No virtio device found");
+ IPL_assert(found, "Boot device not found\n");
+}
+
+static void virtio_setup(void)
+{
+ VDev *vdev = virtio_get_device();
+ QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
+
+ memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
+
+ if (have_iplb) {
+ menu_setup();
+ }
if (virtio_get_device_type() == VIRTIO_ID_NET) {
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = qipl.netboot_start_addr;
} else {
virtio_blk_setup_device(blk_schid);
-
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
}
@@ -195,8 +201,9 @@ int main(void)
sclp_setup();
css_setup();
boot_setup();
- virtio_setup();
+ find_boot_device();
+ virtio_setup();
zipl_load(); /* no return */
panic("Failed to load OS from hard disk\n");
diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c
index dc682c1..fe52668 100644
--- a/tests/boot-serial-test.c
+++ b/tests/boot-serial-test.c
@@ -97,7 +97,7 @@ static testdef_t tests[] = {
{ "sparc", "SS-600MP", "", "TMS390Z55" },
{ "sparc64", "sun4u", "", "UltraSPARC" },
{ "s390x", "s390-ccw-virtio",
- "-nodefaults -device sclpconsole,chardev=serial0", "virtio device" },
+ "-nodefaults -device sclpconsole,chardev=serial0", "device" },
{ "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
{ "microblaze", "petalogix-s3adsp1800", "", "TT",
sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },
--
1.8.3.1
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