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acpi/nfit, libnvdimm: Introduce nvdimm_security_ops

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Some NVDIMMs, like the ones defined by the NVDIMM_FAMILY_INTEL command
set, expose a security capability to lock the DIMMs at poweroff and
require a passphrase to unlock them. The security model is derived from
ATA security. In anticipation of other DIMMs implementing a similar
scheme, and to abstract the core security implementation away from the
device-specific details, introduce nvdimm_security_ops.

Initially only a status retrieval operation, ->state(), is defined,
along with the base infrastructure and definitions for future
operations.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang
2018-12-05 23:39:29 -08:00
committed by Dan Williams
parent 9db67581b9
commit f298939655
9 changed files with 158 additions and 4 deletions
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13
drivers/nvdimm/nd-core.h
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@@ -42,8 +42,21 @@ struct nvdimm {
int id, num_flush;
struct resource *flush_wpq;
const char *dimm_id;
struct {
const struct nvdimm_security_ops *ops;
enum nvdimm_security_state state;
} sec;
};
static inline enum nvdimm_security_state nvdimm_security_state(
struct nvdimm *nvdimm)
{
if (!nvdimm->sec.ops)
return -ENXIO;
return nvdimm->sec.ops->state(nvdimm);
}
/**
* struct blk_alloc_info - tracking info for BLK dpa scanning
* @nd_mapping: blk region mapping boundaries