lkml.org 
[lkml]   [2018]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC PATCH 10/10] vfio/type1: Allocate domain for mediated device
Date
This allocates a domain for the mediated device if it is able to
be isolated and protected individually by IOMMU.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/vfio/vfio_iommu_type1.c | 43 ++++++++++++++++++++++++++++++-----------
1 file changed, 32 insertions(+), 11 deletions(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 3e5b177..496bea6 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1177,6 +1177,22 @@ static int vfio_bus_type(struct device *dev, void *data)
return 0;
}

+static int mdev_private_domain(struct device *dev, void *data)
+{
+ enum mdev_domain_type type;
+ enum mdev_domain_type (*fn)(struct device *dev);
+
+ fn = symbol_get(mdev_get_domain_type);
+ if (fn) {
+ type = fn(dev);
+ symbol_put(mdev_get_domain_type);
+
+ return type != DOMAIN_TYPE_PRIVATE;
+ }
+
+ return -EINVAL;
+}
+
static int vfio_iommu_replay(struct vfio_iommu *iommu,
struct vfio_domain *domain)
{
@@ -1371,18 +1387,23 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
mdev_bus = symbol_get(mdev_bus_type);

if (mdev_bus) {
- if ((bus == mdev_bus) && !iommu_present(bus)) {
- symbol_put(mdev_bus_type);
- if (!iommu->external_domain) {
- INIT_LIST_HEAD(&domain->group_list);
- iommu->external_domain = domain;
- } else
- kfree(domain);
+ if (bus == mdev_bus) {
+ ret = iommu_group_for_each_dev(iommu_group, NULL,
+ mdev_private_domain);
+ if (!iommu_present(bus) || ret) {
+ symbol_put(mdev_bus_type);
+ if (!iommu->external_domain) {
+ INIT_LIST_HEAD(&domain->group_list);
+ iommu->external_domain = domain;
+ } else {
+ kfree(domain);
+ }

- list_add(&group->next,
- &iommu->external_domain->group_list);
- mutex_unlock(&iommu->lock);
- return 0;
+ list_add(&group->next,
+ &iommu->external_domain->group_list);
+ mutex_unlock(&iommu->lock);
+ return 0;
+ }
}
symbol_put(mdev_bus_type);
}
--
2.7.4
\
 
 \ /
  Last update: 2018-07-22 08:12    [W:0.075 / U:5.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site