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| author | Dan Williams <dan.j.williams@intel.com> | 2019-02-03 01:35:26 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-02-03 01:35:26 +0100 |
| commit | d5d30d5a5c60628de5e77e3f292a8f9012d51350 (patch) | |
| tree | e026c86f918fee7ca9c7c4f1bee6a54dbe21c9ef /drivers/nvdimm/dimm_devs.c | |
| parent | MAINTAINERS: Update filesystem-dax and NVDIMM entries (diff) | |
| download | linux-d5d30d5a5c60628de5e77e3f292a8f9012d51350.tar.xz linux-d5d30d5a5c60628de5e77e3f292a8f9012d51350.zip | |
libnvdimm/dimm: Add a no-BLK quirk based on NVDIMM family
As Dexuan reports the NVDIMM_FAMILY_HYPERV platform is incompatible with
the existing Linux namespace implementation because it uses
NSLABEL_FLAG_LOCAL for x1-width PMEM interleave sets. Quirk it as an
platform / DIMM that does not provide BLK-aperture access. Allow the
libnvdimm core to assume no potential for aliasing. In case other
implementations make the same mistake, provide a "noblk" module
parameter to force-enable the quirk.
Link: https://lkml.kernel.org/r/PU1P153MB0169977604493B82B662A01CBF920@PU1P153MB0169.APCP153.PROD.OUTLOOK.COM
Reported-by: Dexuan Cui <decui@microsoft.com>
Tested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/dimm_devs.c')
| -rw-r--r-- | drivers/nvdimm/dimm_devs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 4890310df874..553aa78abeee 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -11,6 +11,7 @@ * General Public License for more details. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/moduleparam.h> #include <linux/vmalloc.h> #include <linux/device.h> #include <linux/ndctl.h> @@ -25,6 +26,10 @@ static DEFINE_IDA(dimm_ida); +static bool noblk; +module_param(noblk, bool, 0444); +MODULE_PARM_DESC(noblk, "force disable BLK / local alias support"); + /* * Retrieve bus and dimm handle and return if this bus supports * get_config_data commands @@ -551,6 +556,8 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus, nvdimm->dimm_id = dimm_id; nvdimm->provider_data = provider_data; + if (noblk) + flags |= 1 << NDD_NOBLK; nvdimm->flags = flags; nvdimm->cmd_mask = cmd_mask; nvdimm->num_flush = num_flush; |