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| author | Tomas Winkler <tomas.winkler@intel.com> | 2018-10-19 20:23:05 +0200 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-11-13 12:46:31 +0100 |
| commit | 9315e73ac87065acd898d3f15b9f524ca86736a7 (patch) | |
| tree | 5a66cb3fbb13557b0881ea6e1ecfe33077ea6bca /drivers/char/tpm/tpm1-cmd.c | |
| parent | tpm1: rename tpm1_pcr_read_dev to tpm1_pcr_read() (diff) | |
| download | linux-9315e73ac87065acd898d3f15b9f524ca86736a7.tar.xz linux-9315e73ac87065acd898d3f15b9f524ca86736a7.zip | |
tpm1: reimplement SAVESTATE using tpm_buf
In tpm1_pm_suspend() function reimplement,
TPM_ORD_SAVESTATE comamnd using tpm_buf.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char/tpm/tpm1-cmd.c')
| -rw-r--r-- | drivers/char/tpm/tpm1-cmd.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index 05b772477bac..d418a27a75e0 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -718,12 +718,6 @@ out: } #define TPM_ORD_SAVESTATE 152 -#define SAVESTATE_RESULT_SIZE 10 -static const struct tpm_input_header savestate_header = { - .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND), - .length = cpu_to_be32(10), - .ordinal = cpu_to_be32(TPM_ORD_SAVESTATE) -}; /** * tpm1_pm_suspend() - pm suspend handler @@ -739,18 +733,22 @@ static const struct tpm_input_header savestate_header = { int tpm1_pm_suspend(struct tpm_chip *chip, int tpm_suspend_pcr) { u8 dummy_hash[TPM_DIGEST_SIZE] = { 0 }; - struct tpm_cmd_t cmd; - int rc, try; + struct tpm_buf buf; + unsigned int try; + int rc; + /* for buggy tpm, flush pcrs with extend to selected dummy */ if (tpm_suspend_pcr) rc = tpm1_pcr_extend(chip, tpm_suspend_pcr, dummy_hash, "extending dummy pcr before suspend"); + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_SAVESTATE); + if (rc) + return rc; /* now do the actual savestate */ for (try = 0; try < TPM_RETRY; try++) { - cmd.header.in = savestate_header; - rc = tpm_transmit_cmd(chip, NULL, &cmd, SAVESTATE_RESULT_SIZE, + rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, NULL); /* @@ -766,6 +764,8 @@ int tpm1_pm_suspend(struct tpm_chip *chip, int tpm_suspend_pcr) if (rc != TPM_WARN_RETRY) break; tpm_msleep(TPM_TIMEOUT_RETRY); + + tpm_buf_reset(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_SAVESTATE); } if (rc) @@ -775,6 +775,8 @@ int tpm1_pm_suspend(struct tpm_chip *chip, int tpm_suspend_pcr) dev_warn(&chip->dev, "TPM savestate took %dms\n", try * TPM_TIMEOUT_RETRY); + tpm_buf_destroy(&buf); + return rc; } |