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| author | Stefan Berger <stefanb@linux.ibm.com> | 2024-10-29 08:49:33 -0400 |
|---|---|---|
| committer | Alexey Kardashevskiy <aik@ozlabs.ru> | 2024-11-06 14:48:54 +1100 |
| commit | 4ef07b9071a8601457ac7a55c981a69e03c5ea06 (patch) | |
| tree | 5c120828f3f8f29d9d678f6ee8419d49a7717edb | |
| parent | 2451d058b3261939f106f6e26da99ef86384c574 (diff) | |
| download | SLOF-4ef07b9071a8601457ac7a55c981a69e03c5ea06.zip SLOF-4ef07b9071a8601457ac7a55c981a69e03c5ea06.tar.gz SLOF-4ef07b9071a8601457ac7a55c981a69e03c5ea06.tar.bz2 | |
tpm: Implement firmware API call get-maximum-cmd-size
Implement the firmware API call get-maximum-cmd-size that returns a TPM's
maximum command size. The caller should use the size returned by this
function to allocate a buffer large enough for TPM commands and also
responses.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
| -rw-r--r-- | board-qemu/slof/vio-vtpm-cdriver.fs | 8 | ||||
| -rw-r--r-- | lib/libtpm/tcgbios.c | 5 | ||||
| -rw-r--r-- | lib/libtpm/tcgbios.h | 1 | ||||
| -rw-r--r-- | lib/libtpm/tpm.code | 10 | ||||
| -rw-r--r-- | lib/libtpm/tpm.in | 1 |
5 files changed, 25 insertions, 0 deletions
diff --git a/board-qemu/slof/vio-vtpm-cdriver.fs b/board-qemu/slof/vio-vtpm-cdriver.fs index df966a2..21c2190 100644 --- a/board-qemu/slof/vio-vtpm-cdriver.fs +++ b/board-qemu/slof/vio-vtpm-cdriver.fs @@ -57,6 +57,14 @@ LOG-SIZE BUFFER: log-base THEN ; +\ firmware API call +: get-maximum-cmd-size ( -- max-size ) + vtpm-debug? IF + ." Call to get-maximum-cmd-size" cr + THEN + tpm-get-maximum-cmd-size ( max-size ) +; + 0 0 s" ibm,sml-efi-reformat-supported" property \ firmware API call diff --git a/lib/libtpm/tcgbios.c b/lib/libtpm/tcgbios.c index aefa865..a64afde 100644 --- a/lib/libtpm/tcgbios.c +++ b/lib/libtpm/tcgbios.c @@ -967,6 +967,11 @@ uint32_t tpm_2hash_ext_log(uint32_t pcrindex, return 0; // FALSE } +uint32_t tpm_get_maximum_cmd_size(void) +{ + return PAPR_VTPM_MAX_BUFFER_SIZE; +} + /* * Add an EV_ACTION measurement to the list of measurements */ diff --git a/lib/libtpm/tcgbios.h b/lib/libtpm/tcgbios.h index 021e219..83148e0 100644 --- a/lib/libtpm/tcgbios.h +++ b/lib/libtpm/tcgbios.h @@ -41,5 +41,6 @@ uint32_t tpm_2hash_ext_log(uint32_t pcrindex, uint32_t eventtype, const char *info, uint32_t infolen, const void *data, uint64_t datalen); +uint32_t tpm_get_maximum_cmd_size(void); #endif /* TCGBIOS_H */ diff --git a/lib/libtpm/tpm.code b/lib/libtpm/tpm.code index f5e1d39..23075b8 100644 --- a/lib/libtpm/tpm.code +++ b/lib/libtpm/tpm.code @@ -206,3 +206,13 @@ PRIM(tpm_X2d_2hash_X2d_ext_X2d_log) info, infolen, data, datalen); MIRP + +/****************************************************************************************/ +/* Firmware API */ +/* SLOF: tpm-get-maximum-cmd-size ( -- max-size ) */ +/* LIBTPM: maxsize = tpm-get-maximum-cmd-size */ +/****************************************************************************************/ +PRIM(tpm_X2d_get_X2d_maximum_X2d_cmd_X2d_size) + PUSH; + TOS.u = tpm_get_maximum_cmd_size(); +MIRP diff --git a/lib/libtpm/tpm.in b/lib/libtpm/tpm.in index 2f80624..d76c479 100644 --- a/lib/libtpm/tpm.in +++ b/lib/libtpm/tpm.in @@ -30,3 +30,4 @@ cod(tpm-gpt-add-entry) cod(tpm-measure-gpt) cod(tpm-hash-log-extend-event-buffer) cod(tpm-2hash-ext-log) +cod(tpm-get-maximum-cmd-size) |