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tpm: Add TPM stress test

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Add a simple command to stress-test a TPM (Trusted Platform Module).

Signed-off-by: Luigi Semenzato <semenzato@chromium.org>

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Luigi Semenzato 2012-12-05 14:46:44 +00:00 committed by Tom Rini
parent 78c112c9f9
commit eea3f4d3e1
1 changed files with 87 additions and 6 deletions
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93
common/cmd_tpm.c
View file

@ -63,19 +63,68 @@ static int tpm_process(int argc, char * const argv[], cmd_tbl_t *cmdtp)
return rv;
}
static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#define CHECK(exp) do { \
int _rv = exp; \
if (_rv) { \
printf("CHECK: %s %d %x\n", #exp, __LINE__, _rv);\
} \
} while (0)
static int tpm_process_stress(int repeat_count)
{
int i;
int rv = 0;
u8 request[] = {0x0, 0xc1,
0x0, 0x0, 0x0, 0x16,
0x0, 0x0, 0x0, 0x65,
0x0, 0x0, 0x0, 0x4,
0x0, 0x0, 0x0, 0x4,
0x0, 0x0, 0x1, 0x9};
u8 response[MAX_TRANSACTION_SIZE];
u32 rlength = MAX_TRANSACTION_SIZE;
CHECK(tis_init());
for (i = 0; i < repeat_count; i++) {
CHECK(tis_open());
rv = tis_sendrecv(request, sizeof(request), response, &rlength);
if (rv) {
printf("tpm test failed at step %d with 0x%x\n", i, rv);
CHECK(tis_close());
break;
}
CHECK(tis_close());
if ((response[6] || response[7] || response[8] || response[9])
&& response[9] != 0x26) {
/* Ignore postinit errors */
printf("tpm command failed at step %d\n"
"tpm error code: %02x%02x%02x%02x\n", i,
response[6], response[7],
response[8], response[9]);
rv = -1;
break;
}
}
return rv;
}
static int do_tpm_many(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[], int repeat_count)
{
int rv = 0;
/*
* Verify that in case it is present, the first argument, it is
* exactly one character in size.
*/
if (argc < 7) {
if (argc < 7 && repeat_count == 0) {
puts("command should be at least six bytes in size\n");
return -1;
}
if (repeat_count > 0) {
rv = tpm_process_stress(repeat_count);
return rv;
}
if (tis_init()) {
puts("tis_init() failed!\n");
return -1;
@ -96,8 +145,40 @@ static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return rv;
}
static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
return do_tpm_many(cmdtp, flag, argc, argv, 0);
}
U_BOOT_CMD(tpm, MAX_TRANSACTION_SIZE, 1, do_tpm,
"<byte> [<byte> ...] - write data and read response",
"send arbitrary data (at least 6 bytes) to the TPM "
"device and read the response"
);
static int do_tpm_stress(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
long unsigned int n;
int rv;
if (argc != 2) {
puts("usage: tpm_stress <count>\n");
return -1;
}
rv = strict_strtoul(argv[1], 10, &n);
if (rv) {
puts("tpm_stress: bad count");
return -1;
}
return do_tpm_many(cmdtp, flag, argc, argv, n);
}
U_BOOT_CMD(tpm_stress, 2, 1, do_tpm_stress,
"<n> - stress-test communication with TPM",
"Repeat a TPM transaction (request-response) N times"
);