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From f5ff3821c1171718af9164be9002d3acfeb12cf2 Mon Sep 17 00:00:00 2001
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Message-Id: <f5ff3821c1171718af9164be9002d3acfeb12cf2@dist-git>
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From: Farhan Ali <alifm@linux.ibm.com>
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Date: Mon, 3 Sep 2018 09:58:50 +0200
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Subject: [PATCH] qemu: mdev: Use vfio-pci 'display' property only with
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vfio-pci mdevs
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S390 is aware of both vfio-pci and vfio-ccw devices, so
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on S390 the capability QEMU_CAPS_VFIO_PCI_DISPLAY will be
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available. Add an extra check to make sure we only set the
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display to off for vfio-pci mediated devices. Otherwise we
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add display for vfio-ccw device and this breaks vfio-ccw
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device qemu command line.
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Fixes: d54e45b6e conf: Introduce new <hostdev> attribute 'display'
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Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
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Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
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Reviewed-by: Erik Skultety <eskultet@redhat.com>
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(cherry picked from commit d6f97d1338ba9470f7c745fab317d272cde84d38)
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RHEL-7.6: https://bugzilla.redhat.com/show_bug.cgi?id=1624735
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RHEL-8.0: https://bugzilla.redhat.com/show_bug.cgi?id=1624740
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Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/qemu/qemu_domain.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
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index 508846116b..17be6e5537 100644
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--- a/src/qemu/qemu_domain.c
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+++ b/src/qemu/qemu_domain.c
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@@ -6272,6 +6272,7 @@ qemuDomainHostdevDefMdevPostParse(virDomainHostdevSubsysMediatedDevPtr mdevsrc,
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/* QEMU 2.12 added support for vfio-pci display type, we default to
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* 'display=off' to stay safe from future changes */
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if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_VFIO_PCI_DISPLAY) &&
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+ mdevsrc->model == VIR_MDEV_MODEL_TYPE_VFIO_PCI &&
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mdevsrc->display == VIR_TRISTATE_SWITCH_ABSENT)
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mdevsrc->display = VIR_TRISTATE_SWITCH_OFF;
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--
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2.18.0
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