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 <[email protected]> --- drivers/acpi/nfit/core.c | 2 + drivers/acpi/nfit/intel.c | 61 ++++++++++++++++++++++++++++++++------------ drivers/nvdimm/dimm_devs.c | 33 +++++++++++++++++++++--- drivers/nvdimm/nd-core.h | 10 ++++--- drivers/nvdimm/security.c | 41 ++++++++++++++++++++---------- include/linux/libnvdimm.h | 9 ++++-- 6 files changed, 115 insertions(+), 41 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 173517eb35b1..2e92b9d51c38 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -389,6 +389,8 @@ static u8 nfit_dsm_revid(unsigned family, unsigned func) [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; diff --git a/drivers/acpi/nfit/intel.c b/drivers/acpi/nfit/intel.c index 3c3f99dfc32c..09317ea23e72 100644 --- a/drivers/acpi/nfit/intel.c +++ b/drivers/acpi/nfit/intel.c @@ -6,7 +6,8 @@ #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, + bool master) { struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); struct { @@ -34,17 +35,28 @@ static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm) 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 - return NVDIMM_SECURITY_UNLOCKED; + if (master) { + if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_ENABLED) + return NVDIMM_SECURITY_MASTER_ENABLED; + else if (nd_cmd.cmd.extended_state & + ND_INTEL_SEC_ESTATE_PLIMIT) + return NVDIMM_SECURITY_MASTER_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; } @@ -77,7 +89,8 @@ static int intel_security_freeze(struct nvdimm *nvdimm) 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, + bool master) { struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); struct { @@ -85,7 +98,6 @@ static int intel_security_change_key(struct nvdimm *nvdimm, 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, @@ -94,7 +106,15 @@ static int intel_security_change_key(struct nvdimm *nvdimm, }; int rc; - if (!test_bit(NVDIMM_INTEL_SET_PASSPHRASE, &nfit_mem->dsm_mask)) + if (master) + nd_cmd.pkg.nd_command = NVDIMM_INTEL_SET_MASTER_PASSPHRASE; + else + nd_cmd.pkg.nd_command = NVDIMM_INTEL_SET_PASSPHRASE; + + if (!test_bit(NVDIMM_INTEL_SET_PASSPHRASE, &nfit_mem->dsm_mask) || + (master && + !test_bit(NVDIMM_INTEL_SET_MASTER_PASSPHRASE, + &nfit_mem->dsm_mask))) return -ENOTTY; if (old_data) @@ -206,7 +226,7 @@ static int intel_security_disable(struct nvdimm *nvdimm, } static int intel_security_erase(struct nvdimm *nvdimm, - const struct nvdimm_key_data *key) + const struct nvdimm_key_data *key, bool master) { int rc; struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); @@ -219,14 +239,21 @@ static int intel_security_erase(struct nvdimm *nvdimm, .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, }, .cmd = { .status = 0, }, }; - if (!test_bit(NVDIMM_INTEL_SECURE_ERASE, &nfit_mem->dsm_mask)) + if (master) + nd_cmd.pkg.nd_command = NVDIMM_INTEL_MASTER_SECURE_ERASE; + else + nd_cmd.pkg.nd_command = NVDIMM_INTEL_SECURE_ERASE; + + if (!test_bit(NVDIMM_INTEL_SECURE_ERASE, &nfit_mem->dsm_mask) || + (master && + !test_bit(NVDIMM_INTEL_MASTER_SECURE_ERASE, + &nfit_mem->dsm_mask))) return -ENOTTY; /* flush all cache before we erase DIMM */ diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index fa42774efb15..8825551aad84 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -387,6 +387,8 @@ static ssize_t security_show(struct device *dev, return sprintf(buf, "frozen\n"); case NVDIMM_SECURITY_OVERWRITE: return sprintf(buf, "overwrite\n"); + default: + return -ENOTTY; } return -ENOTTY; @@ -428,7 +430,7 @@ static ssize_t __security_store(struct device *dev, const char *buf, size_t len) rc = kstrtouint(nkeystr, 0, &newkey); if (rc < 0) return rc; - rc = nvdimm_security_update(nvdimm, key, newkey); + rc = nvdimm_security_update(nvdimm, key, newkey, false); if (rc < 0) return rc; } else if (sysfs_streq(cmd, "erase")) { @@ -437,7 +439,7 @@ static ssize_t __security_store(struct device *dev, const char *buf, size_t len) rc = kstrtouint(keystr, 0, &key); if (rc < 0) return rc; - rc = nvdimm_security_erase(nvdimm, key); + rc = nvdimm_security_erase(nvdimm, key, false); if (rc < 0) return rc; } else if (sysfs_streq(cmd, "overwite")) { @@ -449,6 +451,27 @@ static ssize_t __security_store(struct device *dev, const char *buf, size_t len) rc = nvdimm_security_overwrite(nvdimm, key); if (rc < 0) return rc; + } else if (sysfs_streq(cmd, "master_update")) { + if (rc != 3) + return -EINVAL; + rc = kstrtouint(keystr, 0, &key); + if (rc < 0) + return rc; + rc = kstrtouint(nkeystr, 0, &newkey); + if (rc < 0) + return rc; + rc = nvdimm_security_update(nvdimm, key, newkey, true); + if (rc < 0) + return rc; + } else if (sysfs_streq(cmd, "master_erase")) { + if (rc != 2) + return -EINVAL; + rc = kstrtouint(keystr, 0, &key); + if (rc < 0) + return rc; + rc = nvdimm_security_erase(nvdimm, key, true); + if (rc < 0) + return rc; } else return -EINVAL; @@ -551,7 +574,9 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus, * 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, false); + nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, true); nd_device_register(dev); return nvdimm; @@ -587,7 +612,7 @@ int nvdimm_security_freeze(struct nvdimm *nvdimm) } rc = nvdimm->sec.ops->freeze(nvdimm); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); return rc; } diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h index 2c93e2139346..f3e05e32c530 100644 --- 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; @@ -53,18 +54,19 @@ 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); 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, bool master); +int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid, + bool master); static inline int nvdimm_security_check_busy(struct nvdimm *nvdimm) { if (test_bit(NDD_SECURITY_BUSY, &nvdimm->flags)) diff --git a/drivers/nvdimm/security.c b/drivers/nvdimm/security.c index 3603c5fda1cf..a10eaf4e23c3 100644 --- a/drivers/nvdimm/security.c +++ b/drivers/nvdimm/security.c @@ -121,7 +121,8 @@ static struct key *nvdimm_key_revalidate(struct nvdimm *nvdimm) * 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), false); if (rc < 0) { nvdimm_put_key(key); key = NULL; @@ -174,7 +175,7 @@ static int __nvdimm_security_unlock(struct nvdimm *nvdimm) rc == 0 ? "success" : "fail"); nvdimm_put_key(key); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); return rc; } @@ -224,12 +225,12 @@ int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid) rc == 0 ? "success" : "fail"); nvdimm_put_key(key); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); return rc; } int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid, - unsigned int new_keyid) + unsigned int new_keyid, bool master) { struct device *dev = &nvdimm->dev; struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); @@ -264,18 +265,23 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid, } 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), master); + dev_dbg(dev, "key: %d %d update%s: %s\n", key_serial(key), key_serial(newkey), + master ? "(master)" : "", rc == 0 ? "success" : "fail"); nvdimm_put_key(newkey); nvdimm_put_key(key); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + if (master) + nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, true); + else + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); return rc; } -int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid) +int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid, + bool master) { struct device *dev = &nvdimm->dev; struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); @@ -306,16 +312,24 @@ int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid) return rc; } + if (nvdimm->sec.ext_state != + NVDIMM_SECURITY_MASTER_ENABLED && 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), master); + dev_dbg(dev, "key: %d erase%s: %s\n", key_serial(key), + master ? "(master)" : "", rc == 0 ? "success" : "fail"); nvdimm_put_key(key); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); return rc; } @@ -370,7 +384,7 @@ int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid) rc == 0 ? "success" : "fail"); nvdimm_put_key(key); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); nvdimm_set_security_busy(nvdimm); return rc; } @@ -412,5 +426,6 @@ void nvdimm_security_overwrite_query(struct work_struct *work) sysfs_notify_dirent(nvdimm->sec.overwrite_state); nvdimm->sec.overwrite_tmo = 0; nvdimm_clear_security_busy(nvdimm); - nvdimm->sec.state = nvdimm_security_state(nvdimm); + nvdimm->sec.state = nvdimm_security_state(nvdimm, false); + nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, true); } diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index b728952ccb28..5383a22d6ba0 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -163,6 +163,8 @@ enum nvdimm_security_state { NVDIMM_SECURITY_LOCKED, NVDIMM_SECURITY_FROZEN, NVDIMM_SECURITY_OVERWRITE, + NVDIMM_SECURITY_MASTER_ENABLED, + NVDIMM_SECURITY_MASTER_FROZEN, }; #define NVDIMM_PASSPHRASE_LEN 32 @@ -173,17 +175,18 @@ struct nvdimm_key_data { }; struct nvdimm_security_ops { - enum nvdimm_security_state (*state)(struct nvdimm *nvdimm); + enum nvdimm_security_state (*state)(struct nvdimm *nvdimm, + bool master); 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, bool master); 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, bool master); int (*overwrite)(struct nvdimm *nvdimm, const struct nvdimm_key_data *key_data); int (*query_overwrite)(struct nvdimm *nvdimm); _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
