acpi/nfit: Add support for Intel DSM 1.8 commands

Add command definition for security commands defined in Intel DSM
specification v1.8 [1]. This includes "get security state", "set
passphrase", "unlock unit", "freeze lock", "secure erase", "overwrite",
"overwrite query", "master passphrase enable/disable", and "master
erase", . Since this adds several Intel definitions, move the relevant
bits to their own header.

These commands mutate physical data, but that manipulation is not cache
coherent. The requirement to flush and invalidate caches makes these
commands unsuitable to be called from userspace, so extra logic is added
to detect and block these commands from being submitted via the ioctl
command submission path.

Lastly, the commands may contain sensitive key material that should not
be dumped in a standard debug session. Update the nvdimm-command
payload-dump facility to move security command payloads behind a
default-off compile time switch.

[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>

1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/acpi/nfit/intel.h b/drivers/acpi/nfit/intel.h
index 86746312381f..1802bd398c23 100644
--- a/drivers/acpi/nfit/intel.h
+++ b/drivers/acpi/nfit/intel.h
@@ -35,4 +35,78 @@ struct nd_intel_smart {
 	};
 } __packed;
 
+#define ND_INTEL_STATUS_SIZE		4
+#define ND_INTEL_PASSPHRASE_SIZE	32
+
+#define ND_INTEL_STATUS_NOT_SUPPORTED	1
+#define ND_INTEL_STATUS_RETRY		5
+#define ND_INTEL_STATUS_NOT_READY	9
+#define ND_INTEL_STATUS_INVALID_STATE	10
+#define ND_INTEL_STATUS_INVALID_PASS	11
+#define ND_INTEL_STATUS_OVERWRITE_UNSUPPORTED	0x10007
+#define ND_INTEL_STATUS_OQUERY_INPROGRESS	0x10007
+#define ND_INTEL_STATUS_OQUERY_SEQUENCE_ERR	0x20007
+
+#define ND_INTEL_SEC_STATE_ENABLED	0x02
+#define ND_INTEL_SEC_STATE_LOCKED	0x04
+#define ND_INTEL_SEC_STATE_FROZEN	0x08
+#define ND_INTEL_SEC_STATE_PLIMIT	0x10
+#define ND_INTEL_SEC_STATE_UNSUPPORTED	0x20
+#define ND_INTEL_SEC_STATE_OVERWRITE	0x40
+
+#define ND_INTEL_SEC_ESTATE_ENABLED	0x01
+#define ND_INTEL_SEC_ESTATE_PLIMIT	0x02
+
+struct nd_intel_get_security_state {
+	u32 status;
+	u8 extended_state;
+	u8 reserved[3];
+	u8 state;
+	u8 reserved1[3];
+} __packed;
+
+struct nd_intel_set_passphrase {
+	u8 old_pass[ND_INTEL_PASSPHRASE_SIZE];
+	u8 new_pass[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
+
+struct nd_intel_unlock_unit {
+	u8 passphrase[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
+
+struct nd_intel_disable_passphrase {
+	u8 passphrase[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
+
+struct nd_intel_freeze_lock {
+	u32 status;
+} __packed;
+
+struct nd_intel_secure_erase {
+	u8 passphrase[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
+
+struct nd_intel_overwrite {
+	u8 passphrase[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
+
+struct nd_intel_query_overwrite {
+	u32 status;
+} __packed;
+
+struct nd_intel_set_master_passphrase {
+	u8 old_pass[ND_INTEL_PASSPHRASE_SIZE];
+	u8 new_pass[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
+
+struct nd_intel_master_secure_erase {
+	u8 passphrase[ND_INTEL_PASSPHRASE_SIZE];
+	u32 status;
+} __packed;
 #endif