From: Luigi Semenzato semenzato@chromium.org
Add a simple command to stress-test a TPM (Trusted Platform Module).
Signed-off-by: Luigi Semenzato semenzato@chromium.org
Commit-Ready: Stefan Reinauer reinauer@google.com Signed-off-by: Simon Glass sjg@chromium.org --- common/cmd_tpm.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 files changed, 87 insertions(+), 6 deletions(-)
diff --git a/common/cmd_tpm.c b/common/cmd_tpm.c index 6f5cd48..0970a6f 100644 --- a/common/cmd_tpm.c +++ b/common/cmd_tpm.c @@ -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; +}
- /* - * Verify that in case it is present, the first argument, it is - * exactly one character in size. - */ - if (argc < 7) { + +static int do_tpm_many(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[], int repeat_count) + +{ + int rv = 0; + + 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" +);