tpm: TPM 2.0 baseline support
TPM 2.0 devices are separated by adding a field 'flags' to struct
tpm_chip and defining a flag TPM_CHIP_FLAG_TPM2 for tagging them.
This patch adds the following internal functions:
- tpm2_get_random()
- tpm2_get_tpm_pt()
- tpm2_pcr_extend()
- tpm2_pcr_read()
- tpm2_startup()
Additionally, the following exported functions are implemented for
implementing TPM 2.0 device drivers:
- tpm2_do_selftest()
- tpm2_calc_ordinal_durations()
- tpm2_gen_interrupt()
The existing functions that are exported for the use for existing
subsystems have been changed to check the flags field in struct
tpm_chip and use appropriate TPM 2.0 counterpart if
TPM_CHIP_FLAG_TPM2 is est.
The code for tpm2_calc_ordinal_duration() and tpm2_startup() were
originally written by Will Arthur.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Will Arthur <will.c.arthur@intel.com>
Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Peter Huewe <peterhuewe@gmx.de>
Tested-by: Peter Huewe <peterhuewe@gmx.de>
[phuewe: Fixed copy paste error * 2]
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index d46765b..cc421cf 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -62,6 +62,59 @@
#define TPM_ERR_INVALID_POSTINIT 38
#define TPM_HEADER_SIZE 10
+
+enum tpm2_const {
+ TPM2_PLATFORM_PCR = 24,
+ TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
+ TPM2_TIMEOUT_A = 750,
+ TPM2_TIMEOUT_B = 2000,
+ TPM2_TIMEOUT_C = 200,
+ TPM2_TIMEOUT_D = 30,
+ TPM2_DURATION_SHORT = 20,
+ TPM2_DURATION_MEDIUM = 750,
+ TPM2_DURATION_LONG = 2000,
+};
+
+enum tpm2_structures {
+ TPM2_ST_NO_SESSIONS = 0x8001,
+ TPM2_ST_SESSIONS = 0x8002,
+};
+
+enum tpm2_return_codes {
+ TPM2_RC_INITIALIZE = 0x0100,
+ TPM2_RC_TESTING = 0x090A,
+ TPM2_RC_DISABLED = 0x0120,
+};
+
+enum tpm2_algorithms {
+ TPM2_ALG_SHA1 = 0x0004,
+};
+
+enum tpm2_command_codes {
+ TPM2_CC_FIRST = 0x011F,
+ TPM2_CC_SELF_TEST = 0x0143,
+ TPM2_CC_STARTUP = 0x0144,
+ TPM2_CC_SHUTDOWN = 0x0145,
+ TPM2_CC_GET_CAPABILITY = 0x017A,
+ TPM2_CC_GET_RANDOM = 0x017B,
+ TPM2_CC_PCR_READ = 0x017E,
+ TPM2_CC_PCR_EXTEND = 0x0182,
+ TPM2_CC_LAST = 0x018F,
+};
+
+enum tpm2_permanent_handles {
+ TPM2_RS_PW = 0x40000009,
+};
+
+enum tpm2_capabilities {
+ TPM2_CAP_TPM_PROPERTIES = 6,
+};
+
+enum tpm2_startup_types {
+ TPM2_SU_CLEAR = 0x0000,
+ TPM2_SU_STATE = 0x0001,
+};
+
struct tpm_chip;
struct tpm_vendor_specific {
@@ -99,6 +152,7 @@
enum tpm_chip_flags {
TPM_CHIP_FLAG_REGISTERED = BIT(0),
TPM_CHIP_FLAG_PPI = BIT(1),
+ TPM_CHIP_FLAG_TPM2 = BIT(2),
};
struct tpm_chip {
@@ -370,3 +424,15 @@
{
}
#endif
+
+int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
+int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
+int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
+ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
+ u32 *value, const char *desc);
+
+extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
+extern int tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
+extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
+extern int tpm2_do_selftest(struct tpm_chip *chip);
+extern int tpm2_gen_interrupt(struct tpm_chip *chip, bool quiet);