|
 |
b38b0f |
From 9f13c7165566f442484fa6c335950465ed6a2050 Mon Sep 17 00:00:00 2001
|
|
|
b38b0f |
From: Cornelia Huck <cohuck@redhat.com>
|
|
|
b38b0f |
Date: Wed, 17 Apr 2019 13:57:38 +0100
|
|
|
b38b0f |
Subject: [PATCH 21/24] s390x/pci: Warn when adding PCI devices without the
|
|
|
b38b0f |
'zpci' feature
|
|
|
b38b0f |
|
|
|
b38b0f |
RH-Author: Cornelia Huck <cohuck@redhat.com>
|
|
|
b38b0f |
Message-id: <20190417135741.25297-22-cohuck@redhat.com>
|
|
|
b38b0f |
Patchwork-id: 85803
|
|
|
b38b0f |
O-Subject: [RHEL-8.1.0 qemu-kvm PATCH v2 21/24] s390x/pci: Warn when adding PCI devices without the 'zpci' feature
|
|
|
b38b0f |
Bugzilla: 1699070
|
|
|
b38b0f |
RH-Acked-by: David Hildenbrand <david@redhat.com>
|
|
|
b38b0f |
RH-Acked-by: Thomas Huth <thuth@redhat.com>
|
|
|
b38b0f |
RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
|
|
|
b38b0f |
|
|
|
b38b0f |
From: David Hildenbrand <david@redhat.com>
|
|
|
b38b0f |
|
|
|
b38b0f |
We decided to always create the PCI host bridge, even if 'zpci' is not
|
|
|
b38b0f |
enabled (due to migration compatibility). This however right now allows
|
|
|
b38b0f |
to add zPCI/PCI devices to a VM although the guest will never actually see
|
|
|
b38b0f |
them, confusing people that are using a simple CPU model that has no
|
|
|
b38b0f |
'zpci' enabled - "Why isn't this working" (David Hildenbrand)
|
|
|
b38b0f |
|
|
|
b38b0f |
Let's check for 'zpci' and at least print a warning that this will not
|
|
|
b38b0f |
work as expected. We could also bail out, however that might break
|
|
|
b38b0f |
existing QEMU commandlines.
|
|
|
b38b0f |
|
|
|
b38b0f |
Reviewed-by: Thomas Huth <thuth@redhat.com>
|
|
|
b38b0f |
Signed-off-by: David Hildenbrand <david@redhat.com>
|
|
|
b38b0f |
Message-Id: <20190130155733.32742-4-david@redhat.com>
|
|
|
b38b0f |
Reviewed-by: Collin Walling <walling@linux.ibm.com>
|
|
|
b38b0f |
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
|
|
|
b38b0f |
(cherry picked from commit 703fef6fcf3edcbf169c90b6196fcf88f9e9765a)
|
|
|
b38b0f |
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
|
|
|
b38b0f |
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
|
b38b0f |
---
|
|
|
b38b0f |
hw/s390x/s390-pci-bus.c | 6 ++++++
|
|
|
b38b0f |
1 file changed, 6 insertions(+)
|
|
|
b38b0f |
|
|
|
b38b0f |
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
|
|
|
b38b0f |
index a0f7245..1ba7873 100644
|
|
|
b38b0f |
--- a/hw/s390x/s390-pci-bus.c
|
|
|
b38b0f |
+++ b/hw/s390x/s390-pci-bus.c
|
|
|
b38b0f |
@@ -864,6 +864,12 @@ static void s390_pcihost_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
|
|
|
b38b0f |
{
|
|
|
b38b0f |
S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
|
|
|
b38b0f |
|
|
|
b38b0f |
+ if (!s390_has_feat(S390_FEAT_ZPCI)) {
|
|
|
b38b0f |
+ warn_report("Plugging a PCI/zPCI device without the 'zpci' CPU "
|
|
|
b38b0f |
+ "feature enabled; the guest will not be able to see/use "
|
|
|
b38b0f |
+ "this device");
|
|
|
b38b0f |
+ }
|
|
|
b38b0f |
+
|
|
|
b38b0f |
if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
|
|
|
b38b0f |
PCIDevice *pdev = PCI_DEVICE(dev);
|
|
|
b38b0f |
|
|
|
b38b0f |
--
|
|
|
b38b0f |
1.8.3.1
|
|
|
b38b0f |
|