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From edf2dd4c4eda49957b845ea90a084dde0951f92a 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 10:06:39 +0100
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Subject: [PATCH 14/21] s390-bios: Extend find_dev() for non-virtio devices
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20191014100645.22862-12-thuth@redhat.com>
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Patchwork-id: 91784
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O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 11/17] s390-bios: Extend find_dev() for non-virtio devices
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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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We need a method for finding the subchannel of a dasd device. Let's
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modify find_dev to handle this since it mostly does what we need. Up to
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this point find_dev has been specific to only virtio 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: Cornelia Huck <cohuck@redhat.com>
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Message-Id: <1554388475-18329-11-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 930072d2bf30986e57dac5c5945a32492f288944)
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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 | 16 +++++++++++-----
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1 file changed, 11 insertions(+), 5 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 e403b5f..d04ea89 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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@@ -52,6 +52,12 @@ unsigned int get_loadparm_index(void)
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return atoui(loadparm_str);
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}
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+/*
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+ * Find the subchannel connected to the given device (dev_no) and fill in the
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+ * subchannel information block (schib) with the connected subchannel's info.
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+ * NOTE: The global variable blk_schid is updated to contain the subchannel
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+ * information.
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+ */
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static bool find_dev(Schib *schib, int dev_no)
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{
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int i, r;
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@@ -65,15 +71,15 @@ static bool find_dev(Schib *schib, int dev_no)
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if (!schib->pmcw.dnv) {
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continue;
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}
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- if (!virtio_is_supported(blk_schid)) {
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- continue;
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- }
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+
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/* Skip net devices since no IPLB is created and therefore no
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- * no network bootloader has been loaded
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+ * network bootloader has been loaded
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*/
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- if (virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
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+ if (virtio_is_supported(blk_schid) &&
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+ virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
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continue;
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}
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+
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if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
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return true;
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}
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--
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1.8.3.1
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