summaryrefslogtreecommitdiffstats
path: root/drivers/xen
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/events/events_base.c11
-rw-r--r--drivers/xen/gntdev.c4
-rw-r--r--drivers/xen/swiotlb-xen.c5
-rw-r--r--drivers/xen/unpopulated-alloc.c4
-rw-r--r--drivers/xen/xen-pciback/vpci.c14
-rw-r--r--drivers/xen/xen-pciback/xenbus.c22
6 files changed, 46 insertions, 14 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 7bbfd58958bc..d7e361fb0548 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -642,6 +642,9 @@ static void xen_irq_lateeoi_locked(struct irq_info *info, bool spurious)
}
info->eoi_time = 0;
+
+ /* is_active hasn't been reset yet, do it now. */
+ smp_store_release(&info->is_active, 0);
do_unmask(info, EVT_MASK_REASON_EOI_PENDING);
}
@@ -811,6 +814,7 @@ static void xen_evtchn_close(evtchn_port_t port)
BUG();
}
+/* Not called for lateeoi events. */
static void event_handler_exit(struct irq_info *info)
{
smp_store_release(&info->is_active, 0);
@@ -1883,7 +1887,12 @@ static void lateeoi_ack_dynirq(struct irq_data *data)
if (VALID_EVTCHN(evtchn)) {
do_mask(info, EVT_MASK_REASON_EOI_PENDING);
- event_handler_exit(info);
+ /*
+ * Don't call event_handler_exit().
+ * Need to keep is_active non-zero in order to ignore re-raised
+ * events after cpu affinity changes while a lateeoi is pending.
+ */
+ clear_evtchn(evtchn);
}
}
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index f01d58c7a042..a3e7be96527d 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -1017,8 +1017,10 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
err = mmu_interval_notifier_insert_locked(
&map->notifier, vma->vm_mm, vma->vm_start,
vma->vm_end - vma->vm_start, &gntdev_mmu_ops);
- if (err)
+ if (err) {
+ map->vma = NULL;
goto out_unlock_put;
+ }
}
mutex_unlock(&priv->lock);
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 4c89afc0df62..24d11861ac7d 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -164,6 +164,11 @@ int __ref xen_swiotlb_init(void)
int rc = -ENOMEM;
char *start;
+ if (io_tlb_default_mem != NULL) {
+ pr_warn("swiotlb buffer already initialized\n");
+ return -EEXIST;
+ }
+
retry:
m_ret = XEN_SWIOTLB_ENOMEM;
order = get_order(bytes);
diff --git a/drivers/xen/unpopulated-alloc.c b/drivers/xen/unpopulated-alloc.c
index e64e6befc63b..87e6b7db892f 100644
--- a/drivers/xen/unpopulated-alloc.c
+++ b/drivers/xen/unpopulated-alloc.c
@@ -39,8 +39,10 @@ static int fill_list(unsigned int nr_pages)
}
pgmap = kzalloc(sizeof(*pgmap), GFP_KERNEL);
- if (!pgmap)
+ if (!pgmap) {
+ ret = -ENOMEM;
goto err_pgmap;
+ }
pgmap->type = MEMORY_DEVICE_GENERIC;
pgmap->range = (struct range) {
diff --git a/drivers/xen/xen-pciback/vpci.c b/drivers/xen/xen-pciback/vpci.c
index 4162d0e7e00d..cc7450f2b2a9 100644
--- a/drivers/xen/xen-pciback/vpci.c
+++ b/drivers/xen/xen-pciback/vpci.c
@@ -70,7 +70,7 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
struct pci_dev *dev, int devid,
publish_pci_dev_cb publish_cb)
{
- int err = 0, slot, func = -1;
+ int err = 0, slot, func = PCI_FUNC(dev->devfn);
struct pci_dev_entry *t, *dev_entry;
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
@@ -95,22 +95,25 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
/*
* Keep multi-function devices together on the virtual PCI bus, except
- * virtual functions.
+ * that we want to keep virtual functions at func 0 on their own. They
+ * aren't multi-function devices and hence their presence at func 0
+ * may cause guests to not scan the other functions.
*/
- if (!dev->is_virtfn) {
+ if (!dev->is_virtfn || func) {
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
if (list_empty(&vpci_dev->dev_list[slot]))
continue;
t = list_entry(list_first(&vpci_dev->dev_list[slot]),
struct pci_dev_entry, list);
+ if (t->dev->is_virtfn && !PCI_FUNC(t->dev->devfn))
+ continue;
if (match_slot(dev, t->dev)) {
dev_info(&dev->dev, "vpci: assign to virtual slot %d func %d\n",
- slot, PCI_FUNC(dev->devfn));
+ slot, func);
list_add_tail(&dev_entry->list,
&vpci_dev->dev_list[slot]);
- func = PCI_FUNC(dev->devfn);
goto unlock;
}
}
@@ -123,7 +126,6 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
slot);
list_add_tail(&dev_entry->list,
&vpci_dev->dev_list[slot]);
- func = dev->is_virtfn ? 0 : PCI_FUNC(dev->devfn);
goto unlock;
}
}
diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c
index 5188f02e75fb..c09c7ebd6968 100644
--- a/drivers/xen/xen-pciback/xenbus.c
+++ b/drivers/xen/xen-pciback/xenbus.c
@@ -359,7 +359,8 @@ out:
return err;
}
-static int xen_pcibk_reconfigure(struct xen_pcibk_device *pdev)
+static int xen_pcibk_reconfigure(struct xen_pcibk_device *pdev,
+ enum xenbus_state state)
{
int err = 0;
int num_devs;
@@ -373,9 +374,7 @@ static int xen_pcibk_reconfigure(struct xen_pcibk_device *pdev)
dev_dbg(&pdev->xdev->dev, "Reconfiguring device ...\n");
mutex_lock(&pdev->dev_lock);
- /* Make sure we only reconfigure once */
- if (xenbus_read_driver_state(pdev->xdev->nodename) !=
- XenbusStateReconfiguring)
+ if (xenbus_read_driver_state(pdev->xdev->nodename) != state)
goto out;
err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename, "num_devs", "%d",
@@ -500,6 +499,10 @@ static int xen_pcibk_reconfigure(struct xen_pcibk_device *pdev)
}
}
+ if (state != XenbusStateReconfiguring)
+ /* Make sure we only reconfigure once. */
+ goto out;
+
err = xenbus_switch_state(pdev->xdev, XenbusStateReconfigured);
if (err) {
xenbus_dev_fatal(pdev->xdev, err,
@@ -525,7 +528,7 @@ static void xen_pcibk_frontend_changed(struct xenbus_device *xdev,
break;
case XenbusStateReconfiguring:
- xen_pcibk_reconfigure(pdev);
+ xen_pcibk_reconfigure(pdev, XenbusStateReconfiguring);
break;
case XenbusStateConnected:
@@ -664,6 +667,15 @@ static void xen_pcibk_be_watch(struct xenbus_watch *watch,
xen_pcibk_setup_backend(pdev);
break;
+ case XenbusStateInitialised:
+ /*
+ * We typically move to Initialised when the first device was
+ * added. Hence subsequent devices getting added may need
+ * reconfiguring.
+ */
+ xen_pcibk_reconfigure(pdev, XenbusStateInitialised);
+ break;
+
default:
break;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 17:15:40 +0100