This defines KVM_DEV_VFIO_FILE* and make alias with KVM_DEV_VFIO_GROUP*.
Old userspace uses KVM_DEV_VFIO_GROUP* works as well.
Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
---
Documentation/virt/kvm/devices/vfio.rst | 32 ++++++++++++-------------
include/uapi/linux/kvm.h | 23 +++++++++++++-----
virt/kvm/vfio.c | 18 +++++++-------
3 files changed, 42 insertions(+), 31 deletions(-)
diff --git a/Documentation/virt/kvm/devices/vfio.rst b/Documentation/virt/kvm/devices/vfio.rst
index 2d20dc561069..ac4300ded398 100644
--- a/Documentation/virt/kvm/devices/vfio.rst
+++ b/Documentation/virt/kvm/devices/vfio.rst
@@ -9,23 +9,23 @@ Device types supported:
- KVM_DEV_TYPE_VFIO
Only one VFIO instance may be created per VM. The created device
-tracks VFIO groups in use by the VM and features of those groups
-important to the correctness and acceleration of the VM. As groups
-are enabled and disabled for use by the VM, KVM should be updated
-about their presence. When registered with KVM, a reference to the
-VFIO-group is held by KVM.
-
-Groups:
- KVM_DEV_VFIO_GROUP
-
-KVM_DEV_VFIO_GROUP attributes:
- KVM_DEV_VFIO_GROUP_ADD: Add a VFIO group to VFIO-KVM device tracking
- kvm_device_attr.addr points to an int32_t file descriptor
+tracks VFIO files (group or device) in use by the VM and features
+of those groups/devices important to the correctness and acceleration
+of the VM. As groups/device are enabled and disabled for use by the
+VM, KVM should be updated about their presence. When registered with
+KVM, a reference to the VFIO file is held by KVM.
+
+VFIO Files:
+ KVM_DEV_VFIO_FILE
+
+KVM_DEV_VFIO_FILE attributes:
+ KVM_DEV_VFIO_FILE_ADD: Add a VFIO file (group/device) to VFIO-KVM device
+ tracking kvm_device_attr.addr points to an int32_t file descriptor
+ for the VFIO file.
+ KVM_DEV_VFIO_FILE_DEL: Remove a VFIO file (group/device) from VFIO-KVM device
+ tracking kvm_device_attr.addr points to an int32_t file descriptor
for the VFIO group.
- KVM_DEV_VFIO_GROUP_DEL: Remove a VFIO group from VFIO-KVM device tracking
- kvm_device_attr.addr points to an int32_t file descriptor
- for the VFIO group.
- KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE: attaches a guest visible TCE table
+ KVM_DEV_VFIO_FILE_SET_SPAPR_TCE: attaches a guest visible TCE table
allocated by sPAPR KVM.
kvm_device_attr.addr points to a struct::
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 55155e262646..ad36e144a41d 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1396,15 +1396,26 @@ struct kvm_create_device {
struct kvm_device_attr {
__u32 flags; /* no flags currently defined */
- __u32 group; /* device-defined */
- __u64 attr; /* group-defined */
+ union {
+ __u32 group;
+ __u32 file;
+ }; /* device-defined */
+ __u64 attr; /* VFIO-file-defined or group-defined */
__u64 addr; /* userspace address of attr data */
};
-#define KVM_DEV_VFIO_GROUP 1
-#define KVM_DEV_VFIO_GROUP_ADD 1
-#define KVM_DEV_VFIO_GROUP_DEL 2
-#define KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE 3
+#define KVM_DEV_VFIO_FILE 1
+
+#define KVM_DEV_VFIO_FILE_ADD 1
+#define KVM_DEV_VFIO_FILE_DEL 2
+#define KVM_DEV_VFIO_FILE_SET_SPAPR_TCE 3
+
+/* Group aliases are for compile time uapi compatibility */
+#define KVM_DEV_VFIO_GROUP KVM_DEV_VFIO_FILE
+
+#define KVM_DEV_VFIO_GROUP_ADD KVM_DEV_VFIO_FILE_ADD
+#define KVM_DEV_VFIO_GROUP_DEL KVM_DEV_VFIO_FILE_DEL
+#define KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE KVM_DEV_VFIO_FILE_SET_SPAPR_TCE
enum kvm_device_type {
KVM_DEV_TYPE_FSL_MPIC_20 = 1,
diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c
index 525efe37ab6d..e73ca60af3ae 100644
--- a/virt/kvm/vfio.c
+++ b/virt/kvm/vfio.c
@@ -286,18 +286,18 @@ static int kvm_vfio_set_file(struct kvm_device *dev, long attr,
int32_t fd;
switch (attr) {
- case KVM_DEV_VFIO_GROUP_ADD:
+ case KVM_DEV_VFIO_FILE_ADD:
if (get_user(fd, argp))
return -EFAULT;
return kvm_vfio_file_add(dev, fd);
- case KVM_DEV_VFIO_GROUP_DEL:
+ case KVM_DEV_VFIO_FILE_DEL:
if (get_user(fd, argp))
return -EFAULT;
return kvm_vfio_file_del(dev, fd);
#ifdef CONFIG_SPAPR_TCE_IOMMU
- case KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE:
+ case KVM_DEV_VFIO_FILE_SET_SPAPR_TCE:
return kvm_vfio_file_set_spapr_tce(dev, arg);
#endif
}
@@ -309,7 +309,7 @@ static int kvm_vfio_set_attr(struct kvm_device *dev,
struct kvm_device_attr *attr)
{
switch (attr->group) {
- case KVM_DEV_VFIO_GROUP:
+ case KVM_DEV_VFIO_FILE:
return kvm_vfio_set_file(dev, attr->attr,
u64_to_user_ptr(attr->addr));
}
@@ -320,13 +320,13 @@ static int kvm_vfio_set_attr(struct kvm_device *dev,
static int kvm_vfio_has_attr(struct kvm_device *dev,
struct kvm_device_attr *attr)
{
- switch (attr->group) {
- case KVM_DEV_VFIO_GROUP:
+ switch (attr->file) {
+ case KVM_DEV_VFIO_FILE:
switch (attr->attr) {
- case KVM_DEV_VFIO_GROUP_ADD:
- case KVM_DEV_VFIO_GROUP_DEL:
+ case KVM_DEV_VFIO_FILE_ADD:
+ case KVM_DEV_VFIO_FILE_DEL:
#ifdef CONFIG_SPAPR_TCE_IOMMU
- case KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE:
+ case KVM_DEV_VFIO_FILE_SET_SPAPR_TCE:
#endif
return 0;
}
--
2.34.1
