Hi Alexy,
On Thu, 27 Jun 2013 15:02:31 +1000 Alexey Kardashevskiy a...@ozlabs.ru wrote:
index c488da5..54192b2 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1370,6 +1370,59 @@ static const struct file_operations vfio_device_fops =
{
};
/**
+ * External user API,
Hi Alexy,
On Thu, 27 Jun 2013 15:02:31 +1000 Alexey Kardashevskiy a...@ozlabs.ru wrote:
+/* Allows an external user (for example, KVM) to unlock an IOMMU group */
+static void vfio_group_del_external_user(struct file *filep)
+{
+ struct vfio_group *group = filep-private_data;
+
+
On Thu, 2013-06-27 at 16:59 +1000, Stephen Rothwell wrote:
+/* Allows an external user (for example, KVM) to unlock an IOMMU
group */
+static void vfio_group_del_external_user(struct file *filep)
+{
+ struct vfio_group *group = filep-private_data;
+
+ BUG_ON(filep-f_op !=
On 06/27/2013 07:42 PM, Benjamin Herrenschmidt wrote:
On Thu, 2013-06-27 at 16:59 +1000, Stephen Rothwell wrote:
+/* Allows an external user (for example, KVM) to unlock an IOMMU
group */
+static void vfio_group_del_external_user(struct file *filep)
+{
+ struct vfio_group *group =
On Sun, Jun 23, 2013 at 10:41:24PM -0600, Alex Williamson wrote:
On Mon, 2013-06-24 at 13:52 +1000, David Gibson wrote:
On Sat, Jun 22, 2013 at 08:28:06AM -0600, Alex Williamson wrote:
On Sat, 2013-06-22 at 22:03 +1000, David Gibson wrote:
On Thu, Jun 20, 2013 at 08:55:13AM -0600, Alex
On 06/27/2013 12:02:36 AM, Alexey Kardashevskiy wrote:
+/*
+ * The KVM guest can be backed with 16MB pages.
+ * In this case, we cannot do page counting from the real mode
+ * as the compound pages are used - they are linked in a list
+ * with pointers as virtual addresses which are inaccessible
Once stop_machine() is gone from the CPU offline path, we won't be able
to depend on disabling preemption to prevent CPUs from going offline
from under us.
Use the get/put_online_cpus_atomic() APIs to prevent CPUs from going
offline, while invoking from atomic context.
Cc: Benjamin Herrenschmidt
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