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From 2bbc164594e03b4ab2b436433c7757990801ef49 Mon Sep 17 00:00:00 2001
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From: Cornelia Huck <cohuck@redhat.com>
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Date: Wed, 17 Apr 2019 13:57:32 +0100
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Subject: [PATCH 15/24] s390x/pci: Move some hotplug checks to the pre_plug
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handler
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RH-Author: Cornelia Huck <cohuck@redhat.com>
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Message-id: <20190417135741.25297-16-cohuck@redhat.com>
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Patchwork-id: 85797
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O-Subject: [RHEL-8.1.0 qemu-kvm PATCH v2 15/24] s390x/pci: Move some hotplug checks to the pre_plug handler
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Bugzilla: 1699070
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
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From: David Hildenbrand <david@redhat.com>
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Let's move most of the checks to the new pre_plug handler. As a PCI
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bridge is just a PCI device, we can simplify the code.
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Notes: We cannot yet move the MSIX check or device ID creation +
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zPCI device creation to the pre_plug handler as both parts are not
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fixed before actual device realization (and therefore after pre_plug and
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before plug). Once that part is factored out, we can move these parts to
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the pre_plug handler, too and therefore remove all possible errors from
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the plug handler.
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Reviewed-by: Collin Walling <walling@linux.ibm.com>
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Signed-off-by: David Hildenbrand <david@redhat.com>
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Message-Id: <20190114103110.10909-3-david@redhat.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 6069bcdeaceebb91f43bc4762e3f63eee48cd390)
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/s390x/s390-pci-bus.c | 41 +++++++++++++++++++++++++----------------
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1 file changed, 25 insertions(+), 16 deletions(-)
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diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
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index f1b3334..e3f576a 100644
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--- a/hw/s390x/s390-pci-bus.c
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+++ b/hw/s390x/s390-pci-bus.c
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@@ -822,11 +822,31 @@ static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev)
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}
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pbdev->idx = idx;
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- s->next_idx = (idx + 1) & FH_MASK_INDEX;
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-
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return true;
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}
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+static void s390_pcihost_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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+ Error **errp)
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+{
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+ S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
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+
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+ if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
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+ PCIDevice *pdev = PCI_DEVICE(dev);
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+
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+ if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
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+ error_setg(errp, "multifunction not supported in s390");
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+ return;
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+ }
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+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
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+ S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev);
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+
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+ if (!s390_pci_alloc_idx(s, pbdev)) {
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+ error_setg(errp, "no slot for plugging zpci device");
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+ return;
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+ }
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+ }
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+}
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+
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static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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Error **errp)
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{
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@@ -839,11 +859,6 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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PCIBridge *pb = PCI_BRIDGE(dev);
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PCIDevice *pdev = PCI_DEVICE(dev);
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- if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
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- error_setg(errp, "multifunction not supported in s390");
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- return;
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- }
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-
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pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq);
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pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s);
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@@ -863,11 +878,6 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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} else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
pdev = PCI_DEVICE(dev);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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- if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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- error_setg(errp, "multifunction not supported in s390");
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
- return;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
- }
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
-
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
if (!dev->id) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
/* In the case the PCI device does not define an id */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
/* we generate one based on the PCI address */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
@@ -909,10 +919,8 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
} else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
pbdev = S390_PCI_DEVICE(dev);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
- if (!s390_pci_alloc_idx(s, pbdev)) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
- error_setg(errp, "no slot for plugging zpci device");
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
- return;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
- }
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
+ /* the allocated idx is actually getting used */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
+ s->next_idx = (pbdev->idx + 1) & FH_MASK_INDEX;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
pbdev->fh = pbdev->idx;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
@@ -1052,6 +1060,7 @@ static void s390_pcihost_class_init(ObjectClass *klass, void *data)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
dc->reset = s390_pcihost_reset;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
dc->realize = s390_pcihost_realize;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
+ hc->pre_plug = s390_pcihost_pre_plug;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
hc->plug = s390_pcihost_plug;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
hc->unplug = s390_pcihost_unplug;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
msi_nonbroken = true;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
--
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
1.8.3.1
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
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