@@ -61,6 +61,7 @@ struct idxd_group {
enum idxd_wq_state {
IDXD_WQ_DISABLED = 0,
IDXD_WQ_ENABLED,
+ IDXD_WQ_LOCKED,
};
enum idxd_wq_flag {
@@ -84,8 +84,10 @@ static void idxd_vdcm_init(struct vdcm_idxd *vidxd)
vidxd_mmio_init(vidxd);
- if (wq_dedicated(wq) && wq->state == IDXD_WQ_ENABLED)
+ if (wq_dedicated(wq) && wq->state == IDXD_WQ_ENABLED) {
idxd_wq_disable(wq, NULL);
+ wq->state = IDXD_WQ_LOCKED;
+ }
}
static void idxd_vdcm_release(struct mdev_device *mdev)
@@ -821,6 +821,8 @@ static ssize_t wq_state_show(struct device *dev,
return sprintf(buf, "disabled\n");
case IDXD_WQ_ENABLED:
return sprintf(buf, "enabled\n");
+ case IDXD_WQ_LOCKED:
+ return sprintf(buf, "locked\n");
}
return sprintf(buf, "unknown\n");
When a dedicated wq is enabled as mdev, we must disable the wq on the device in order to program the pasid to the wq. Introduce a wq state IDXD_WQ_LOCKED that is software state only in order to prevent the user from modifying the configuration while mdev wq is in this state. While in this state, the wq is not in DISABLED state and will prevent any modifications to the configuration. It is also not in the ENABLED state and therefore prevents any actions allowed in the ENABLED state. Signed-off-by: Dave Jiang <dave.jiang@intel.com> --- drivers/dma/idxd/idxd.h | 1 + drivers/dma/idxd/mdev.c | 4 +++- drivers/dma/idxd/sysfs.c | 2 ++ 3 files changed, 6 insertions(+), 1 deletion(-)