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s390-bios: Use control unit type to determine boot method

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The boot method is different depending on which device type we are
booting from. Let's examine the control unit type to determine if we're
a virtio device. We'll eventually add a case to check for a real dasd device
here as well.

Since we have to call enable_subchannel() in main now, might as well
remove that call from virtio.c : run_ccw(). This requires adding some
additional enable_subchannel calls to not break calls to
virtio_is_supported().

Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-14-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Jason J. Herne 2019-04-04 10:34:32 -04:00 • committed by Thomas Huth
parent 9de6cbb152
commit 3668cb7ce8
3 changed files with 15 additions and 3 deletions
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1
pc-bios/s390-ccw/netmain.c
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@ -476,6 +476,7 @@ static bool find_net_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
enable_subchannel(net_schid);
if (!virtio_is_supported(net_schid)) {
continue;
}