diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2018-12-07 10:33:30 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-12-21 12:44:41 -0800 |
| commit | 03b65b22ada8115a7a7bfdf0789f6a94adfd6070 (patch) | |
| tree | d8ac0a260db2dcac8b52ed36566bd9b89ab2d116 /drivers/acpi | |
| parent | 4c6926a23b76ea23403976290cd45a7a143f6500 (diff) | |
| download | linux-03b65b22ada8115a7a7bfdf0789f6a94adfd6070.tar.bz2 | |
acpi/nfit, libnvdimm: Add disable passphrase support to Intel nvdimm.
Add support to disable passphrase (security) for the Intel nvdimm. The
passphrase used for disabling is pulled from an encrypted-key in the kernel
user keyring. The action is triggered by writing "disable <keyid>" to the
sysfs attribute "security".
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/nfit/intel.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/acpi/nfit/intel.c b/drivers/acpi/nfit/intel.c index 38f2cb364853..bb033b74bff0 100644 --- a/drivers/acpi/nfit/intel.c +++ b/drivers/acpi/nfit/intel.c @@ -163,6 +163,46 @@ static int intel_security_unlock(struct nvdimm *nvdimm, return 0; } +static int intel_security_disable(struct nvdimm *nvdimm, + const struct nvdimm_key_data *key_data) +{ + int rc; + struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); + struct { + struct nd_cmd_pkg pkg; + struct nd_intel_disable_passphrase cmd; + } nd_cmd = { + .pkg = { + .nd_command = NVDIMM_INTEL_DISABLE_PASSPHRASE, + .nd_family = NVDIMM_FAMILY_INTEL, + .nd_size_in = ND_INTEL_PASSPHRASE_SIZE, + .nd_size_out = ND_INTEL_STATUS_SIZE, + .nd_fw_size = ND_INTEL_STATUS_SIZE, + }, + }; + + if (!test_bit(NVDIMM_INTEL_DISABLE_PASSPHRASE, &nfit_mem->dsm_mask)) + return -ENOTTY; + + memcpy(nd_cmd.cmd.passphrase, key_data->data, + sizeof(nd_cmd.cmd.passphrase)); + rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL); + if (rc < 0) + return rc; + + switch (nd_cmd.cmd.status) { + case 0: + break; + case ND_INTEL_STATUS_INVALID_PASS: + return -EINVAL; + case ND_INTEL_STATUS_INVALID_STATE: + default: + return -ENXIO; + } + + return 0; +} + /* * TODO: define a cross arch wbinvd equivalent when/if * NVDIMM_FAMILY_INTEL command support arrives on another arch. @@ -183,6 +223,7 @@ static const struct nvdimm_security_ops __intel_security_ops = { .state = intel_security_state, .freeze = intel_security_freeze, .change_key = intel_security_change_key, + .disable = intel_security_disable, #ifdef CONFIG_X86 .unlock = intel_security_unlock, #endif |