aboutsummaryrefslogtreecommitdiff
path: root/hw/tpm/tpm_passthrough.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/tpm/tpm_passthrough.c')
-rw-r--r--hw/tpm/tpm_passthrough.c37
1 files changed, 32 insertions, 5 deletions
diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c
index 2bf3c6fd61..a94c7c5a24 100644
--- a/hw/tpm/tpm_passthrough.c
+++ b/hw/tpm/tpm_passthrough.c
@@ -112,14 +112,31 @@ static void tpm_write_fatal_error_response(uint8_t *out, uint32_t out_len)
}
}
+static bool tpm_passthrough_is_selftest(const uint8_t *in, uint32_t in_len)
+{
+ struct tpm_req_hdr *hdr = (struct tpm_req_hdr *)in;
+
+ if (in_len >= sizeof(*hdr)) {
+ return (be32_to_cpu(hdr->ordinal) == TPM_ORD_ContinueSelfTest);
+ }
+
+ return false;
+}
+
static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt,
const uint8_t *in, uint32_t in_len,
- uint8_t *out, uint32_t out_len)
+ uint8_t *out, uint32_t out_len,
+ bool *selftest_done)
{
int ret;
+ bool is_selftest;
+ const struct tpm_resp_hdr *hdr;
tpm_pt->tpm_op_canceled = false;
tpm_pt->tpm_executing = true;
+ *selftest_done = false;
+
+ is_selftest = tpm_passthrough_is_selftest(in, in_len);
ret = tpm_passthrough_unix_write(tpm_pt->tpm_fd, in, in_len);
if (ret != in_len) {
@@ -149,6 +166,11 @@ static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt,
"packet from TPM\n");
}
+ if (is_selftest && (ret >= sizeof(struct tpm_resp_hdr))) {
+ hdr = (struct tpm_resp_hdr *)out;
+ *selftest_done = (be32_to_cpu(hdr->errcode) == 0);
+ }
+
err_exit:
if (ret < 0) {
tpm_write_fatal_error_response(out, out_len);
@@ -160,13 +182,15 @@ err_exit:
}
static int tpm_passthrough_unix_transfer(TPMPassthruState *tpm_pt,
- const TPMLocality *locty_data)
+ const TPMLocality *locty_data,
+ bool *selftest_done)
{
return tpm_passthrough_unix_tx_bufs(tpm_pt,
locty_data->w_buffer.buffer,
locty_data->w_offset,
locty_data->r_buffer.buffer,
- locty_data->r_buffer.size);
+ locty_data->r_buffer.size,
+ selftest_done);
}
static void tpm_passthrough_worker_thread(gpointer data,
@@ -175,16 +199,19 @@ static void tpm_passthrough_worker_thread(gpointer data,
TPMPassthruThreadParams *thr_parms = user_data;
TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(thr_parms->tb);
TPMBackendCmd cmd = (TPMBackendCmd)data;
+ bool selftest_done = false;
DPRINTF("tpm_passthrough: processing command type %d\n", cmd);
switch (cmd) {
case TPM_BACKEND_CMD_PROCESS_CMD:
tpm_passthrough_unix_transfer(tpm_pt,
- thr_parms->tpm_state->locty_data);
+ thr_parms->tpm_state->locty_data,
+ &selftest_done);
thr_parms->recv_data_callback(thr_parms->tpm_state,
- thr_parms->tpm_state->locty_number);
+ thr_parms->tpm_state->locty_number,
+ selftest_done);
break;
case TPM_BACKEND_CMD_INIT:
case TPM_BACKEND_CMD_END: