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authorLuigi Semenzato <semenzato@chromium.org>2012-12-05 14:46:44 +0000
committerTom Rini <trini@ti.com>2012-12-11 13:18:13 -0700
commiteea3f4d3e14d21c1a00b332f3b5c8a2b8c8bc386 (patch)
treef6945a0398c75a7cc1cbc529cacd25516b029065 /common
parent78c112c9f9eb3cd06ea53e1c414cabc55560e9cd (diff)
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tpm: Add TPM stress test
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>
Diffstat (limited to 'common')
-rw-r--r--common/cmd_tpm.c93
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"
+);