Pass the group flags to ->attach_group and remove the messy check for
the bus type.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
drivers/vfio/vfio.c | 23 +++++------------------
drivers/vfio/vfio.h | 18 +++++++++++++++++-
drivers/vfio/vfio_iommu_spapr_tce.c | 2 +-
drivers/vfio/vfio_iommu_type1.c | 19 ++-----------------
4 files changed, 25 insertions(+), 37 deletions(-)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index b2f2951f7fc759..3a668fe2ea96f7 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -68,21 +68,6 @@ struct vfio_unbound_dev {
struct list_head unbound_next;
};
-/*
- * Virtual device without IOMMU backing. The VFIO core fakes up an iommu_group
- * as the iommu_group sysfs interface is part of the userspace ABI. The user
- * of these devices must not be able to directly trigger unmediated DMA.
- */
-#define VFIO_EMULATED_IOMMU (1 << 0)
-
-/*
- * Physical device without IOMMU backing. The VFIO core fakes up an iommu_group
- * as the iommu_group sysfs interface is part of the userspace ABI. Users can
- * trigger unmediated DMA by the device, usage is highly dangerous, requires
- * an explicit opt-in and will taint the kernel.
- */
-#define VFIO_NO_IOMMU (1 << 1)
-
struct vfio_group {
struct kref kref;
int minor;
@@ -210,7 +195,7 @@ static long vfio_noiommu_ioctl(void *iommu_data,
}
static int vfio_noiommu_attach_group(void *iommu_data,
- struct iommu_group *iommu_group)
+ struct iommu_group *iommu_group, unsigned int flags)
{
return 0;
}
@@ -1119,7 +1104,8 @@ static int __vfio_container_attach_groups(struct vfio_container *container,
int ret = -ENODEV;
list_for_each_entry(group, &container->group_list, container_next) {
- ret = driver->ops->attach_group(data, group->iommu_group);
+ ret = driver->ops->attach_group(data, group->iommu_group,
+ group->flags);
if (ret)
goto unwind;
}
@@ -1377,7 +1363,8 @@ static int vfio_group_set_container(struct vfio_group *group, int container_fd)
driver = container->iommu_driver;
if (driver) {
ret = driver->ops->attach_group(container->iommu_data,
- group->iommu_group);
+ group->iommu_group,
+ group->flags);
if (ret)
goto unlock_out;
}
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h
index a78de649eb2f16..3bdf21416563a4 100644
--- a/drivers/vfio/vfio.h
+++ b/drivers/vfio/vfio.h
@@ -9,6 +9,21 @@ enum vfio_iommu_notify_type {
VFIO_IOMMU_CONTAINER_CLOSE = 0,
};
+/*
+ * Virtual device without IOMMU backing. The VFIO core fakes up an iommu_group
+ * as the iommu_group sysfs interface is part of the userspace ABI. The user
+ * of these devices must not be able to directly trigger unmediated DMA.
+ */
+#define VFIO_EMULATED_IOMMU (1 << 0)
+
+/*
+ * Physical device without IOMMU backing. The VFIO core fakes up an iommu_group
+ * as the iommu_group sysfs interface is part of the userspace ABI. Users can
+ * trigger unmediated DMA by the device, usage is highly dangerous, requires
+ * an explicit opt-in and will taint the kernel.
+ */
+#define VFIO_NO_IOMMU (1 << 1)
+
/**
* struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks
*/
@@ -20,7 +35,8 @@ struct vfio_iommu_driver_ops {
long (*ioctl)(void *iommu_data, unsigned int cmd,
unsigned long arg);
int (*attach_group)(void *iommu_data,
- struct iommu_group *group);
+ struct iommu_group *group,
+ unsigned int flags);
void (*detach_group)(void *iommu_data,
struct iommu_group *group);
int (*pin_pages)(void *iommu_data,
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 3efd09faeca4a8..7567328d347d25 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -1239,7 +1239,7 @@ static long tce_iommu_take_ownership_ddw(struct tce_container *container,
}
static int tce_iommu_attach_group(void *iommu_data,
- struct iommu_group *iommu_group)
+ struct iommu_group *iommu_group, unsigned int flags)
{
int ret = 0;
struct tce_container *container = iommu_data;
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 39e2706d0b3f34..ca3c995c84166f 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -36,7 +36,6 @@
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/workqueue.h>
-#include <linux/mdev.h>
#include <linux/notifier.h>
#include <linux/dma-iommu.h>
#include <linux/irqdomain.h>
@@ -1934,20 +1933,6 @@ static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions,
return ret;
}
-static bool vfio_bus_is_mdev(struct bus_type *bus)
-{
- struct bus_type *mdev_bus;
- bool ret = false;
-
- mdev_bus = symbol_get(mdev_bus_type);
- if (mdev_bus) {
- ret = (bus == mdev_bus);
- symbol_put(mdev_bus_type);
- }
-
- return ret;
-}
-
/*
* This is a helper function to insert an address range to iova list.
* The list is initially created with a single entry corresponding to
@@ -2172,7 +2157,7 @@ static void vfio_iommu_iova_insert_copy(struct vfio_iommu *iommu,
}
static int vfio_iommu_type1_attach_group(void *iommu_data,
- struct iommu_group *iommu_group)
+ struct iommu_group *iommu_group, unsigned int flags)
{
struct vfio_iommu *iommu = iommu_data;
struct vfio_iommu_group *group;
@@ -2207,7 +2192,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
if (ret)
goto out_free;
- if (vfio_bus_is_mdev(bus)) {
+ if (flags & VFIO_EMULATED_IOMMU) {
if (!iommu->external_domain) {
INIT_LIST_HEAD(&domain->group_list);
iommu->external_domain = domain;
--
2.30.2
