From edf2dd4c4eda49957b845ea90a084dde0951f92a Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Mon, 14 Oct 2019 10:06:39 +0100
Subject: [PATCH 14/21] s390-bios: Extend find_dev() for non-virtio devices
RH-Author: Thomas Huth <thuth@redhat.com>
Message-id: <20191014100645.22862-12-thuth@redhat.com>
Patchwork-id: 91784
O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 11/17] s390-bios: Extend find_dev() for non-virtio devices
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>
We need a method for finding the subchannel of a dasd device. Let's
modify find_dev to handle this since it mostly does what we need. Up to
this point find_dev has been specific to only virtio devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-11-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 930072d2bf30986e57dac5c5945a32492f288944)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
pc-bios/s390-ccw/main.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index e403b5f..d04ea89 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -52,6 +52,12 @@ unsigned int get_loadparm_index(void)
return atoui(loadparm_str);
}
+/*
+ * Find the subchannel connected to the given device (dev_no) and fill in the
+ * subchannel information block (schib) with the connected subchannel's info.
+ * NOTE: The global variable blk_schid is updated to contain the subchannel
+ * information.
+ */
static bool find_dev(Schib *schib, int dev_no)
{
int i, r;
@@ -65,15 +71,15 @@ static bool find_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
- if (!virtio_is_supported(blk_schid)) {
- continue;
- }
+
/* Skip net devices since no IPLB is created and therefore no
- * no network bootloader has been loaded
+ * network bootloader has been loaded
*/
- if (virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
+ if (virtio_is_supported(blk_schid) &&
+ virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
}
+
if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
return true;
}
--
1.8.3.1