diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2022-12-02 01:03:35 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-12-03 10:52:32 +0300 |
| commit | dc370b28c8425669e7ed5af4c01540645cfb00ec (patch) | |
| tree | 37e58358cc8be8750eca80a2342e7459d25c9464 /include/linux/libnvdimm.h | |
| parent | 07cb5f705b4fe9e1386a610da4cb3c063267714f (diff) | |
| download | linux-dc370b28c8425669e7ed5af4c01540645cfb00ec.tar.xz | |
nvdimm/region: Move cache management to the region driver
Now that cpu_cache_invalidate_memregion() is generically available, use
it to centralize CPU cache management in the nvdimm region driver.
This trades off removing redundant per-dimm CPU cache flushing with an
opportunistic flush on every region disable event to cover the case of
sensitive dirty data in the cache being written back to media after a
secure erase / overwrite event.
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166993221550.1995348.16843505129579060258.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/libnvdimm.h')
| -rw-r--r-- | include/linux/libnvdimm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index 3bf658a74ccb..af38252ad704 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -35,6 +35,11 @@ enum { NDD_WORK_PENDING = 4, /* dimm supports namespace labels */ NDD_LABELING = 6, + /* + * dimm contents have changed requiring invalidation of CPU caches prior + * to activation of a region that includes this device + */ + NDD_INCOHERENT = 7, /* need to set a limit somewhere, but yes, this is likely overkill */ ND_IOCTL_MAX_BUFLEN = SZ_4M, |