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From 19b96c7f412b9b8d893ec9ebd2603565d6afa178 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Mon, 14 Oct 2019 10:06:31 +0100
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Subject: [PATCH 06/21] s390-bios: decouple cio setup from virtio
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20191014100645.22862-4-thuth@redhat.com>
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Patchwork-id: 91776
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O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 03/17] s390-bios: decouple cio setup from virtio
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Bugzilla: 1664376
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
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From: "Jason J. Herne" <jjherne@linux.ibm.com>
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Move channel i/o setup code out to a separate function. This decouples cio
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setup from the virtio code path and allows us to make use of it for booting
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dasd devices.
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Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
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Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
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Reviewed-by: Collin Walling <walling@linux.ibm.com>
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Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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Message-Id: <1554388475-18329-3-git-send-email-jjherne@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 87f910c142d5589ef937ac216f92c6dcddae955e)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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pc-bios/s390-ccw/main.c | 20 +++++++++++++-------
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1 file changed, 13 insertions(+), 7 deletions(-)
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diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
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index 544851d..e82fe2c 100644
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--- a/pc-bios/s390-ccw/main.c
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+++ b/pc-bios/s390-ccw/main.c
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@@ -99,6 +99,18 @@ static void menu_setup(void)
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}
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}
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+/*
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+ * Initialize the channel I/O subsystem so we can talk to our ipl/boot device.
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+ */
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+static void css_setup(void)
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+{
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+ /*
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+ * Unconditionally enable mss support. In every sane configuration this
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+ * will succeed; and even if it doesn't, stsch_err() can handle it.
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+ */
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+ enable_mss_facility();
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+}
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+
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static void virtio_setup(void)
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{
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Schib schib;
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@@ -109,13 +121,6 @@ static void virtio_setup(void)
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VDev *vdev = virtio_get_device();
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QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
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- /*
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- * We unconditionally enable mss support. In every sane configuration,
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- * this will succeed; and even if it doesn't, stsch_err() can deal
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- * with the consequences.
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- */
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- enable_mss_facility();
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-
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sclp_get_loadparm_ascii(loadparm_str);
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memcpy(ldp + 10, loadparm_str, LOADPARM_LEN);
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sclp_print(ldp);
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@@ -168,6 +173,7 @@ static void virtio_setup(void)
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int main(void)
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{
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sclp_setup();
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+ css_setup();
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virtio_setup();
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zipl_load(); /* no return */
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--
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1.8.3.1
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