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acpi/nfit, libnvdimm: Add enable/update passphrase support for Intel nvdimms

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Add support for enabling and updating passphrase on the Intel nvdimms.
The passphrase is the an encrypted key in the kernel user keyring.
We trigger the update via writing "update <old_keyid> <new_keyid>" to the
sysfs attribute "security". If no <old_keyid> exists (for enabling
security) then a 0 should be used.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang
2018-12-07 13:29:09 -07:00
committed by Dan Williams
parent 03b65b22ad
commit d2a4ac73f5
3 changed files with 69 additions and 7 deletions
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7
drivers/nvdimm/nd-core.h
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@@ -59,12 +59,19 @@ static inline enum nvdimm_security_state nvdimm_security_state(
int nvdimm_security_freeze(struct nvdimm *nvdimm);
#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid);
int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
unsigned int new_keyid);
#else
static inline int nvdimm_security_disable(struct nvdimm *nvdimm,
unsigned int keyid)
{
return -EOPNOTSUPP;
}
static inline int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
unsigned int new_keyid)
{
return -EOPNOTSUPP;
}
#endif
/**