Re: [PATCH v4 01/21] tpm2: add new tpm2 commands according to TCG 1.36
From: Nayna Jain
Date: Wed Sep 26 2018 - 02:47:22 EST
On 09/21/2018 07:28 PM, Tomas Winkler wrote:
1. TPM2_CC_LAST has moved from 182 to 193
2. Convert tpm2_ordinal_duration from an array into a switch statement,
as there are not so many commands that require special duration
relative to a number of commands, the switch statement function
is called tpm2_ordinal_duration_index().
3. Fix kdoc comments for tpm2_calc_ordinal_duration().
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
---
V2-V3: Rebase.
V4: 1. Fix kdoc
2. Rename tpm2_ordinal_duration() to tpm2_ordinal_duration_index()
3. Move the two functions close to each other in the file.
drivers/char/tpm/tpm.h | 41 +++++---
drivers/char/tpm/tpm2-cmd.c | 236 +++++++++++++++++---------------------------
2 files changed, 113 insertions(+), 164 deletions(-)
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index f20dc8ece348..0f08518b525d 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -134,22 +134,31 @@ enum tpm2_algorithms {
};
enum tpm2_command_codes {
- TPM2_CC_FIRST = 0x011F,
- TPM2_CC_CREATE_PRIMARY = 0x0131,
- TPM2_CC_SELF_TEST = 0x0143,
- TPM2_CC_STARTUP = 0x0144,
- TPM2_CC_SHUTDOWN = 0x0145,
- TPM2_CC_CREATE = 0x0153,
- TPM2_CC_LOAD = 0x0157,
- TPM2_CC_UNSEAL = 0x015E,
- TPM2_CC_CONTEXT_LOAD = 0x0161,
- TPM2_CC_CONTEXT_SAVE = 0x0162,
- TPM2_CC_FLUSH_CONTEXT = 0x0165,
- TPM2_CC_GET_CAPABILITY = 0x017A,
- TPM2_CC_GET_RANDOM = 0x017B,
- TPM2_CC_PCR_READ = 0x017E,
- TPM2_CC_PCR_EXTEND = 0x0182,
- TPM2_CC_LAST = 0x018F,
+ TPM2_CC_FIRST = 0x011F,
+ TPM2_CC_HIERARCHY_CONTROL = 0x0121,
+ TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129,
+ TPM2_CC_CREATE_PRIMARY = 0x0131,
+ TPM2_CC_SEQUENCE_COMPLETE = 0x013E,
+ TPM2_CC_SELF_TEST = 0x0143,
+ TPM2_CC_STARTUP = 0x0144,
+ TPM2_CC_SHUTDOWN = 0x0145,
+ TPM2_CC_NV_READ = 0x014E,
+ TPM2_CC_CREATE = 0x0153,
+ TPM2_CC_LOAD = 0x0157,
+ TPM2_CC_SEQUENCE_UPDATE = 0x015C,
+ TPM2_CC_UNSEAL = 0x015E,
+ TPM2_CC_CONTEXT_LOAD = 0x0161,
+ TPM2_CC_CONTEXT_SAVE = 0x0162,
+ TPM2_CC_FLUSH_CONTEXT = 0x0165,
+ TPM2_CC_VERIFY_SIGNATURE = 0x0177,
+ TPM2_CC_GET_CAPABILITY = 0x017A,
+ TPM2_CC_GET_RANDOM = 0x017B,
+ TPM2_CC_PCR_READ = 0x017E,
+ TPM2_CC_PCR_EXTEND = 0x0182,
+ TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
+ TPM2_CC_HASH_SEQUENCE_START = 0x0186,
+ TPM2_CC_CREATE_LOADED = 0x0191,
+ TPM2_CC_LAST = 0x0193, /* Spec 1.36 */
};
enum tpm2_permanent_handles {
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 3acf4fd4e5a5..be0a9ebcd7d7 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -40,129 +40,95 @@ static struct tpm2_hash tpm2_hash_map[] = {
{HASH_ALGO_SM3_256, TPM2_ALG_SM3_256},
};
-/*
- * Array with one entry per ordinal defining the maximum amount
- * of time the chip could take to return the result. The values
- * of the SHORT, MEDIUM, and LONG durations are taken from the
- * PC Client Profile (PTP) specification.
- * LONG_LONG is for commands that generates keys which empirically
- * takes longer time on some systems.
+/**
+ * tpm2_ordinal_duration_index() - returns an index to the chip duration
+ * table (enum tpm_duration), that describes the maximum amount of
+ * time the chip could take to return the result for a particular ordinal.
+ *
+ * The values of the MEDIUM, and LONG durations are taken
+ * from the PC Client Profile (PTP) specification (750, 2000 msec)
+ *
+ * LONG_LONG is for commands that generates keys which empirically takes
+ * a longer time on some systems.
+ *
+ * @ordinal: TPM command ordinal.
+ *
+ * Return: TPM_MEDIUM, TPM_LONG, TPM_LONG_LONG, and TPM_UNDEFINED.
*/
-static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
- TPM_UNDEFINED, /* 11F */
- TPM_UNDEFINED, /* 120 */
- TPM_LONG, /* 121 */
- TPM_UNDEFINED, /* 122 */
- TPM_UNDEFINED, /* 123 */
- TPM_UNDEFINED, /* 124 */
- TPM_UNDEFINED, /* 125 */
- TPM_UNDEFINED, /* 126 */
- TPM_UNDEFINED, /* 127 */
- TPM_UNDEFINED, /* 128 */
- TPM_LONG, /* 129 */
- TPM_UNDEFINED, /* 12a */
- TPM_UNDEFINED, /* 12b */
- TPM_UNDEFINED, /* 12c */
- TPM_UNDEFINED, /* 12d */
- TPM_UNDEFINED, /* 12e */
- TPM_UNDEFINED, /* 12f */
- TPM_UNDEFINED, /* 130 */
- TPM_LONG_LONG, /* 131 */
- TPM_UNDEFINED, /* 132 */
- TPM_UNDEFINED, /* 133 */
- TPM_UNDEFINED, /* 134 */
- TPM_UNDEFINED, /* 135 */
- TPM_UNDEFINED, /* 136 */
- TPM_UNDEFINED, /* 137 */
- TPM_UNDEFINED, /* 138 */
- TPM_UNDEFINED, /* 139 */
- TPM_UNDEFINED, /* 13a */
- TPM_UNDEFINED, /* 13b */
- TPM_UNDEFINED, /* 13c */
- TPM_UNDEFINED, /* 13d */
- TPM_MEDIUM, /* 13e */
- TPM_UNDEFINED, /* 13f */
- TPM_UNDEFINED, /* 140 */
- TPM_UNDEFINED, /* 141 */
- TPM_UNDEFINED, /* 142 */
- TPM_LONG, /* 143 */
- TPM_MEDIUM, /* 144 */
- TPM_UNDEFINED, /* 145 */
- TPM_UNDEFINED, /* 146 */
- TPM_UNDEFINED, /* 147 */
- TPM_UNDEFINED, /* 148 */
- TPM_UNDEFINED, /* 149 */
- TPM_UNDEFINED, /* 14a */
- TPM_UNDEFINED, /* 14b */
- TPM_UNDEFINED, /* 14c */
- TPM_UNDEFINED, /* 14d */
- TPM_LONG, /* 14e */
- TPM_UNDEFINED, /* 14f */
- TPM_UNDEFINED, /* 150 */
- TPM_UNDEFINED, /* 151 */
- TPM_UNDEFINED, /* 152 */
- TPM_LONG_LONG, /* 153 */
- TPM_UNDEFINED, /* 154 */
- TPM_UNDEFINED, /* 155 */
- TPM_UNDEFINED, /* 156 */
- TPM_UNDEFINED, /* 157 */
- TPM_UNDEFINED, /* 158 */
- TPM_UNDEFINED, /* 159 */
- TPM_UNDEFINED, /* 15a */
- TPM_UNDEFINED, /* 15b */
- TPM_MEDIUM, /* 15c */
- TPM_UNDEFINED, /* 15d */
- TPM_UNDEFINED, /* 15e */
- TPM_UNDEFINED, /* 15f */
- TPM_UNDEFINED, /* 160 */
- TPM_UNDEFINED, /* 161 */
- TPM_UNDEFINED, /* 162 */
- TPM_UNDEFINED, /* 163 */
- TPM_UNDEFINED, /* 164 */
- TPM_UNDEFINED, /* 165 */
- TPM_UNDEFINED, /* 166 */
- TPM_UNDEFINED, /* 167 */
- TPM_UNDEFINED, /* 168 */
- TPM_UNDEFINED, /* 169 */
- TPM_UNDEFINED, /* 16a */
- TPM_UNDEFINED, /* 16b */
- TPM_UNDEFINED, /* 16c */
- TPM_UNDEFINED, /* 16d */
- TPM_UNDEFINED, /* 16e */
- TPM_UNDEFINED, /* 16f */
- TPM_UNDEFINED, /* 170 */
- TPM_UNDEFINED, /* 171 */
- TPM_UNDEFINED, /* 172 */
- TPM_UNDEFINED, /* 173 */
- TPM_UNDEFINED, /* 174 */
- TPM_UNDEFINED, /* 175 */
- TPM_UNDEFINED, /* 176 */
- TPM_LONG, /* 177 */
- TPM_UNDEFINED, /* 178 */
- TPM_UNDEFINED, /* 179 */
- TPM_MEDIUM, /* 17a */
- TPM_LONG, /* 17b */
- TPM_UNDEFINED, /* 17c */
- TPM_UNDEFINED, /* 17d */
- TPM_UNDEFINED, /* 17e */
- TPM_UNDEFINED, /* 17f */
- TPM_UNDEFINED, /* 180 */
- TPM_UNDEFINED, /* 181 */
- TPM_MEDIUM, /* 182 */
- TPM_UNDEFINED, /* 183 */
- TPM_UNDEFINED, /* 184 */
- TPM_MEDIUM, /* 185 */
- TPM_MEDIUM, /* 186 */
- TPM_UNDEFINED, /* 187 */
- TPM_UNDEFINED, /* 188 */
- TPM_UNDEFINED, /* 189 */
- TPM_UNDEFINED, /* 18a */
- TPM_UNDEFINED, /* 18b */
- TPM_UNDEFINED, /* 18c */
- TPM_UNDEFINED, /* 18d */
- TPM_UNDEFINED, /* 18e */
- TPM_UNDEFINED /* 18f */
-};
+static u8 tpm2_ordinal_duration_index(u32 ordinal)
+{
+ switch (ordinal) {
+ /* Startup */
+ case TPM2_CC_STARTUP: /* 144 */
+ return TPM_MEDIUM;
+
+ case TPM2_CC_SELF_TEST: /* 143 */
+ return TPM_LONG;
+
+ case TPM2_CC_GET_RANDOM: /* 17B */
+ return TPM_LONG;
+
+ case TPM2_CC_SEQUENCE_UPDATE: /* 15C */
+ return TPM_MEDIUM;
+ case TPM2_CC_SEQUENCE_COMPLETE: /* 13E */
+ return TPM_MEDIUM;
+ case TPM2_CC_EVENT_SEQUENCE_COMPLETE: /* 185 */
+ return TPM_MEDIUM;
+ case TPM2_CC_HASH_SEQUENCE_START: /* 186 */
+ return TPM_MEDIUM;
+
+ case TPM2_CC_VERIFY_SIGNATURE: /* 177 */
+ return TPM_LONG;
+
+ case TPM2_CC_PCR_EXTEND: /* 182 */
+ return TPM_MEDIUM;
+
+ case TPM2_CC_HIERARCHY_CONTROL: /* 121 */
+ return TPM_LONG;
+ case TPM2_CC_HIERARCHY_CHANGE_AUTH: /* 129 */
+ return TPM_LONG;
+
+ case TPM2_CC_GET_CAPABILITY: /* 17A */
+ return TPM_MEDIUM;
+
+ case TPM2_CC_NV_READ: /* 14E */
+ return TPM_LONG;
+
+ case TPM2_CC_CREATE_PRIMARY: /* 131 */
+ return TPM_LONG_LONG;
+ case TPM2_CC_CREATE: /* 153 */
+ return TPM_LONG_LONG;
+ case TPM2_CC_CREATE_LOADED: /* 191 */
+ return TPM_LONG_LONG;
+
+ default:
+ return TPM_UNDEFINED;
+ }
+}
+
+/**
+ * tpm2_calc_ordinal_duration() - returns the maximum amount of time
+ * the chip could take to return the result for a particular ordinal
+ * in jiffies.
+ *
+ * @chip: TPM chip to use.
+ * @ordinal: TPM command ordinal.
+ *
+ * Return: A maxiaml duration time for an ordinal in jiffies.
typo *maximal*
+ */
+unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
+{
+ unsigned int index;
+
+ index = tpm2_ordinal_duration_index(ordinal);
+
+ if (index != TPM_UNDEFINED)
+ return chip->duration[index];
+ else
+ return msecs_to_jiffies(TPM2_DURATION_DEFAULT);
+}
+EXPORT_SYMBOL_GPL(tpm2_calc_ordinal_duration);
+
struct tpm2_pcr_read_out {
__be32 update_cnt;
@@ -748,32 +714,6 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type)
tpm_buf_destroy(&buf);
}
-/*
- * tpm2_calc_ordinal_duration() - maximum duration for a command
- *
- * @chip: TPM chip to use.
- * @ordinal: command code number.
- *
- * Return: maximum duration for a command
- */
-unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
-{
- int index = TPM_UNDEFINED;
- int duration = 0;
-
- if (ordinal >= TPM2_CC_FIRST && ordinal <= TPM2_CC_LAST)
- index = tpm2_ordinal_duration[ordinal - TPM2_CC_FIRST];
-
- if (index != TPM_UNDEFINED)
- duration = chip->duration[index];
-
- if (duration <= 0)
- duration = msecs_to_jiffies(TPM2_DURATION_DEFAULT);
-
- return duration;
-}
-EXPORT_SYMBOL_GPL(tpm2_calc_ordinal_duration);
-
/**
* tpm2_do_selftest() - ensure that all self tests have passed
*