From: Dave Jiang <dave.jiang@intel.com>
Date: Mon, 10 Dec 2018 10:53:22 -0700
Subject: acpi/nfit, libnvdimm/security: add Intel DSM 1.8 master passphrase
support
Git-commit: 89fa9d8ea7bdfa841d19044485cec5f4171069e5
Patch-mainline: v5.0-rc1
References: FATE#325581
With Intel DSM 1.8 [1] two new security DSMs are introduced. Enable/update
master passphrase and master secure erase. The master passphrase allows
a secure erase to be performed without the user passphrase that is set on
the NVDIMM. The commands of master_update and master_erase are added to
the sysfs knob in order to initiate the DSMs. They are similar in opeartion
mechanism compare to update and erase.
[1]: http://pmem.io/documents/NVDIMM_DSM_Interface-V1.8.pdf
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/acpi/nfit/core.c | 2 +
drivers/acpi/nfit/intel.c | 53 ++++++++++++++++++++++++++++++---------------
drivers/nvdimm/dimm_devs.c | 34 ++++++++++++++++++++--------
drivers/nvdimm/nd-core.h | 21 +++++++++++------
drivers/nvdimm/security.c | 43 ++++++++++++++++++++++++++----------
include/linux/libnvdimm.h | 14 +++++++++--
6 files changed, 118 insertions(+), 49 deletions(-)
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -389,6 +389,8 @@ static u8 nfit_dsm_revid(unsigned family
[NVDIMM_INTEL_SECURE_ERASE] = 2,
[NVDIMM_INTEL_OVERWRITE] = 2,
[NVDIMM_INTEL_QUERY_OVERWRITE] = 2,
+ [NVDIMM_INTEL_SET_MASTER_PASSPHRASE] = 2,
+ [NVDIMM_INTEL_MASTER_SECURE_ERASE] = 2,
},
};
u8 id;
--- a/drivers/acpi/nfit/intel.c
+++ b/drivers/acpi/nfit/intel.c
@@ -7,7 +7,8 @@
#include "intel.h"
#include "nfit.h"
-static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm)
+static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm,
+ enum nvdimm_passphrase_type ptype)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
@@ -33,7 +34,7 @@ static enum nvdimm_security_state intel_
* The DSM spec states that the security state is indeterminate
* until the overwrite DSM completes.
*/
- if (nvdimm_in_overwrite(nvdimm))
+ if (nvdimm_in_overwrite(nvdimm) && ptype == NVDIMM_USER)
return NVDIMM_SECURITY_OVERWRITE;
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
@@ -43,17 +44,28 @@ static enum nvdimm_security_state intel_
return -EIO;
/* check and see if security is enabled and locked */
- if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_UNSUPPORTED)
- return -ENXIO;
- else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_ENABLED) {
- if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_LOCKED)
- return NVDIMM_SECURITY_LOCKED;
- else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN ||
- nd_cmd.cmd.state & ND_INTEL_SEC_STATE_PLIMIT)
- return NVDIMM_SECURITY_FROZEN;
- else
+ if (ptype == NVDIMM_MASTER) {
+ if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_ENABLED)
return NVDIMM_SECURITY_UNLOCKED;
+ else if (nd_cmd.cmd.extended_state &
+ ND_INTEL_SEC_ESTATE_PLIMIT)
+ return NVDIMM_SECURITY_FROZEN;
+ } else {
+ if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_UNSUPPORTED)
+ return -ENXIO;
+ else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_ENABLED) {
+ if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_LOCKED)
+ return NVDIMM_SECURITY_LOCKED;
+ else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN
+ || nd_cmd.cmd.state &
+ ND_INTEL_SEC_STATE_PLIMIT)
+ return NVDIMM_SECURITY_FROZEN;
+ else
+ return NVDIMM_SECURITY_UNLOCKED;
+ }
}
+
+ /* this should cover master security disabled as well */
return NVDIMM_SECURITY_DISABLED;
}
@@ -86,24 +98,28 @@ static int intel_security_freeze(struct
static int intel_security_change_key(struct nvdimm *nvdimm,
const struct nvdimm_key_data *old_data,
- const struct nvdimm_key_data *new_data)
+ const struct nvdimm_key_data *new_data,
+ enum nvdimm_passphrase_type ptype)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
+ unsigned int cmd = ptype == NVDIMM_MASTER ?
+ NVDIMM_INTEL_SET_MASTER_PASSPHRASE :
+ NVDIMM_INTEL_SET_PASSPHRASE;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_set_passphrase cmd;
} nd_cmd = {
.pkg = {
- .nd_command = NVDIMM_INTEL_SET_PASSPHRASE,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE * 2,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
+ .nd_command = cmd,
},
};
int rc;
- if (!test_bit(NVDIMM_INTEL_SET_PASSPHRASE, &nfit_mem->dsm_mask))
+ if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
if (old_data)
@@ -212,10 +228,13 @@ static int intel_security_disable(struct
}
static int intel_security_erase(struct nvdimm *nvdimm,
- const struct nvdimm_key_data *key)
+ const struct nvdimm_key_data *key,
+ enum nvdimm_passphrase_type ptype)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
+ unsigned int cmd = ptype == NVDIMM_MASTER ?
+ NVDIMM_INTEL_MASTER_SECURE_ERASE : NVDIMM_INTEL_SECURE_ERASE;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_secure_erase cmd;
@@ -225,11 +244,11 @@ static int intel_security_erase(struct n
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
- .nd_command = NVDIMM_INTEL_SECURE_ERASE,
+ .nd_command = cmd,
},
};
- if (!test_bit(NVDIMM_INTEL_SECURE_ERASE, &nfit_mem->dsm_mask))
+ if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
/* flush all cache before we erase DIMM */
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -387,17 +387,21 @@ static ssize_t security_show(struct devi
return sprintf(buf, "frozen\n");
case NVDIMM_SECURITY_OVERWRITE:
return sprintf(buf, "overwrite\n");
+ default:
+ return -ENOTTY;
}
return -ENOTTY;
}
-#define OPS \
- C( OP_FREEZE, "freeze", 1), \
- C( OP_DISABLE, "disable", 2), \
- C( OP_UPDATE, "update", 3), \
- C( OP_ERASE, "erase", 2), \
- C( OP_OVERWRITE, "overwrite", 2)
+#define OPS \
+ C( OP_FREEZE, "freeze", 1), \
+ C( OP_DISABLE, "disable", 2), \
+ C( OP_UPDATE, "update", 3), \
+ C( OP_ERASE, "erase", 2), \
+ C( OP_OVERWRITE, "overwrite", 2), \
+ C( OP_MASTER_UPDATE, "master_update", 3), \
+ C( OP_MASTER_ERASE, "master_erase", 2)
#undef C
#define C(a, b, c) a
enum nvdimmsec_op_ids { OPS };
@@ -450,13 +454,21 @@ static ssize_t __security_store(struct d
rc = nvdimm_security_disable(nvdimm, key);
} else if (i == OP_UPDATE) {
dev_dbg(dev, "update %u %u\n", key, newkey);
- rc = nvdimm_security_update(nvdimm, key, newkey);
+ rc = nvdimm_security_update(nvdimm, key, newkey, NVDIMM_USER);
} else if (i == OP_ERASE) {
dev_dbg(dev, "erase %u\n", key);
- rc = nvdimm_security_erase(nvdimm, key);
+ rc = nvdimm_security_erase(nvdimm, key, NVDIMM_USER);
} else if (i == OP_OVERWRITE) {
dev_dbg(dev, "overwrite %u\n", key);
rc = nvdimm_security_overwrite(nvdimm, key);
+ } else if (i == OP_MASTER_UPDATE) {
+ dev_dbg(dev, "master_update %u %u\n", key, newkey);
+ rc = nvdimm_security_update(nvdimm, key, newkey,
+ NVDIMM_MASTER);
+ } else if (i == OP_MASTER_ERASE) {
+ dev_dbg(dev, "master_erase %u\n", key);
+ rc = nvdimm_security_erase(nvdimm, key,
+ NVDIMM_MASTER);
} else
return -EINVAL;
@@ -558,7 +570,9 @@ struct nvdimm *__nvdimm_create(struct nv
* Security state must be initialized before device_add() for
* attribute visibility.
*/
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ /* get security state and extended (master) state */
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
+ nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
nd_device_register(dev);
return nvdimm;
@@ -599,7 +613,7 @@ int nvdimm_security_freeze(struct nvdimm
}
rc = nvdimm->sec.ops->freeze(nvdimm);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -46,6 +46,7 @@ struct nvdimm {
struct {
const struct nvdimm_security_ops *ops;
enum nvdimm_security_state state;
+ enum nvdimm_security_state ext_state;
unsigned int overwrite_tmo;
struct kernfs_node *overwrite_state;
} sec;
@@ -53,19 +54,21 @@ struct nvdimm {
};
static inline enum nvdimm_security_state nvdimm_security_state(
- struct nvdimm *nvdimm)
+ struct nvdimm *nvdimm, bool master)
{
if (!nvdimm->sec.ops)
return -ENXIO;
- return nvdimm->sec.ops->state(nvdimm);
+ return nvdimm->sec.ops->state(nvdimm, master);
}
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);
-int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid);
+ unsigned int new_keyid,
+ enum nvdimm_passphrase_type pass_type);
+int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
+ enum nvdimm_passphrase_type pass_type);
int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid);
void nvdimm_security_overwrite_query(struct work_struct *work);
#else
@@ -74,12 +77,16 @@ static inline int nvdimm_security_disabl
{
return -EOPNOTSUPP;
}
-static inline int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
- unsigned int new_keyid)
+static inline int nvdimm_security_update(struct nvdimm *nvdimm,
+ unsigned int keyid,
+ unsigned int new_keyid,
+ enum nvdimm_passphrase_type pass_type)
{
return -EOPNOTSUPP;
}
-static inline int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
+static inline int nvdimm_security_erase(struct nvdimm *nvdimm,
+ unsigned int keyid,
+ enum nvdimm_passphrase_type pass_type)
{
return -EOPNOTSUPP;
}
--- a/drivers/nvdimm/security.c
+++ b/drivers/nvdimm/security.c
@@ -121,7 +121,8 @@ static struct key *nvdimm_key_revalidate
* Send the same key to the hardware as new and old key to
* verify that the key is good.
*/
- rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key), key_data(key));
+ rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key),
+ key_data(key), NVDIMM_USER);
if (rc < 0) {
nvdimm_put_key(key);
key = NULL;
@@ -173,7 +174,7 @@ static int __nvdimm_security_unlock(stru
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
@@ -222,12 +223,13 @@ int nvdimm_security_disable(struct nvdim
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
- unsigned int new_keyid)
+ unsigned int new_keyid,
+ enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@@ -262,18 +264,25 @@ int nvdimm_security_update(struct nvdimm
}
rc = nvdimm->sec.ops->change_key(nvdimm, key ? key_data(key) : NULL,
- key_data(newkey));
- dev_dbg(dev, "key: %d %d update: %s\n",
+ key_data(newkey), pass_type);
+ dev_dbg(dev, "key: %d %d update%s: %s\n",
key_serial(key), key_serial(newkey),
+ pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
nvdimm_put_key(newkey);
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ if (pass_type == NVDIMM_MASTER)
+ nvdimm->sec.ext_state = nvdimm_security_state(nvdimm,
+ NVDIMM_MASTER);
+ else
+ nvdimm->sec.state = nvdimm_security_state(nvdimm,
+ NVDIMM_USER);
return rc;
}
-int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
+int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
+ enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@@ -303,16 +312,24 @@ int nvdimm_security_erase(struct nvdimm
return -EBUSY;
}
+ if (nvdimm->sec.ext_state != NVDIMM_SECURITY_UNLOCKED
+ && pass_type == NVDIMM_MASTER) {
+ dev_warn(dev,
+ "Attempt to secure erase in wrong master state.\n");
+ return -EOPNOTSUPP;
+ }
+
key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY);
if (!key)
return -ENOKEY;
- rc = nvdimm->sec.ops->erase(nvdimm, key_data(key));
- dev_dbg(dev, "key: %d erase: %s\n", key_serial(key),
+ rc = nvdimm->sec.ops->erase(nvdimm, key_data(key), pass_type);
+ dev_dbg(dev, "key: %d erase%s: %s\n", key_serial(key),
+ pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
@@ -375,6 +392,7 @@ int nvdimm_security_overwrite(struct nvd
get_device(dev);
queue_delayed_work(system_wq, &nvdimm->dwork, 0);
}
+
return rc;
}
@@ -421,7 +439,8 @@ void __nvdimm_security_overwrite_query(s
clear_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags);
clear_bit(NDD_WORK_PENDING, &nvdimm->flags);
put_device(&nvdimm->dev);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
+ nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
}
void nvdimm_security_overwrite_query(struct work_struct *work)
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -174,18 +174,26 @@ struct nvdimm_key_data {
u8 data[NVDIMM_PASSPHRASE_LEN];
};
+enum nvdimm_passphrase_type {
+ NVDIMM_USER,
+ NVDIMM_MASTER,
+};
+
struct nvdimm_security_ops {
- enum nvdimm_security_state (*state)(struct nvdimm *nvdimm);
+ enum nvdimm_security_state (*state)(struct nvdimm *nvdimm,
+ enum nvdimm_passphrase_type pass_type);
int (*freeze)(struct nvdimm *nvdimm);
int (*change_key)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *old_data,
- const struct nvdimm_key_data *new_data);
+ const struct nvdimm_key_data *new_data,
+ enum nvdimm_passphrase_type pass_type);
int (*unlock)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
int (*disable)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
int (*erase)(struct nvdimm *nvdimm,
- const struct nvdimm_key_data *key_data);
+ const struct nvdimm_key_data *key_data,
+ enum nvdimm_passphrase_type pass_type);
int (*overwrite)(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data);
int (*query_overwrite)(struct nvdimm *nvdimm);