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From a60940fb7ef026f3aa968e77389efa51ea648ddf Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Fri, 8 Jul 2022 12:29:50 +0200
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Subject: [PATCH 34/37] pc-bios/s390-ccw/virtio: Read device config after
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feature negotiation
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RH-Author: Thomas Huth <thuth@redhat.com>
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RH-MergeRequest: 198: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
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RH-Commit: [6/9] 99ed8765d614207db19ded75d62c65171674d982
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RH-Bugzilla: 2098076
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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Bugzilla: http://bugzilla.redhat.com/2098076
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commit aa5c69ce99411c4886bcd051f288afc02b6d968d
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Author: Thomas Huth <thuth@redhat.com>
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Date: Mon Jul 4 13:18:58 2022 +0200
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pc-bios/s390-ccw/virtio: Read device config after feature negotiation
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Feature negotiation should be done first, since some fields in the
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config area can depend on the negotiated features and thus should
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rather be read afterwards.
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While we're at it, also adjust the error message here a little bit
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(the code is nowadays used for non-block virtio devices, too).
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Message-Id: <20220704111903.62400-8-thuth@redhat.com>
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Reviewed-by: Eric Farman <farman@linux.ibm.com>
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Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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---
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pc-bios/s390-ccw/virtio.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
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index 4e85a2eb82..d8c2b52710 100644
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--- a/pc-bios/s390-ccw/virtio.c
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+++ b/pc-bios/s390-ccw/virtio.c
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@@ -262,10 +262,6 @@ void virtio_setup_ccw(VDev *vdev)
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rc = run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false);
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IPL_assert(rc == 0, "Could not write DRIVER status to host");
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- IPL_assert(
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- run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false) == 0,
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- "Could not get block device configuration");
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-
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/* Feature negotiation */
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for (i = 0; i < ARRAY_SIZE(vdev->guest_features); i++) {
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feats.features = 0;
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@@ -278,6 +274,9 @@ void virtio_setup_ccw(VDev *vdev)
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IPL_assert(rc == 0, "Could not set features bits");
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}
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+ rc = run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false);
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+ IPL_assert(rc == 0, "Could not get virtio device configuration");
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+
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for (i = 0; i < vdev->nr_vqs; i++) {
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VqInfo info = {
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.queue = (unsigned long long) ring_area + (i * VIRTIO_RING_SIZE),
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--
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2.35.3
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