On 3/20/23 08:35, Minwoo Im wrote:
VF token was introduced [1] to kernel vfio-pci along with SR-IOV
support [2]. This patch adds support VF token among PF and VF(s). To
passthu PCIe VF to a VM, kernel >= v5.7 needs this.
It can be configured with UUID like:
-device vfio-pci,host=DDDD:BB:DD:F,vf-token=<uuid>,...
[1]
https://lore.kernel.org/linux-pci/158396393244.5601.10297430724964025753.st...@gimli.home/
[2]
https://lore.kernel.org/linux-pci/158396044753.5601.14804870681174789709.st...@gimli.home/
Cc: Alex Williamson <alex.william...@redhat.com>
Signed-off-by: Minwoo Im <minwoo...@samsung.com>
Reviewed-by: Klaus Jensen <k.jen...@samsung.com>
---
hw/vfio/pci.c | 13 ++++++++++++-
hw/vfio/pci.h | 1 +
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index ec9a854361..cf27f28936 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2856,6 +2856,8 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
int groupid;
int i, ret;
bool is_mdev;
+ char uuid[UUID_FMT_LEN];
+ char *name;
if (!vbasedev->sysfsdev) {
if (!(~vdev->host.domain || ~vdev->host.bus ||
@@ -2936,7 +2938,15 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
goto error;
}
- ret = vfio_get_device(group, vbasedev->name, vbasedev, errp);
+ if (!qemu_uuid_is_null(&vdev->vf_token)) {
+ qemu_uuid_unparse(&vdev->vf_token, uuid);
+ name = g_strdup_printf("%s vf_token=%s", vbasedev->name, uuid);
+ } else {
+ name = vbasedev->name;
+ }
+
+ ret = vfio_get_device(group, name, vbasedev, errp);
+ g_free(name);
if (ret) {
vfio_put_group(group);
goto error;
Shouldn't we set the VF token in the kernel also ? See this QEMU implementation
https://lore.kernel.org/lkml/20200204161737.34696...@w520.home/
May be I misunderstood.
Thanks,
C.
@@ -3268,6 +3278,7 @@ static void vfio_instance_init(Object *obj)
static Property vfio_pci_dev_properties[] = {
DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
+ DEFINE_PROP_UUID_NODEFAULT("vf-token", VFIOPCIDevice, vf_token),
DEFINE_PROP_STRING("sysfsdev", VFIOPCIDevice, vbasedev.sysfsdev),
DEFINE_PROP_ON_OFF_AUTO("x-pre-copy-dirty-page-tracking", VFIOPCIDevice,
vbasedev.pre_copy_dirty_page_tracking,
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index 177abcc8fb..2674476d6c 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -137,6 +137,7 @@ struct VFIOPCIDevice {
VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */
void *igd_opregion;
PCIHostDeviceAddress host;
+ QemuUUID vf_token;
EventNotifier err_notifier;
EventNotifier req_notifier;
int (*resetfn)(struct VFIOPCIDevice *);