backends/tpm/tpm_passthrough.c

164      * As of Linux 3.7 the tpm_tis driver does not properly cancel  in tpm_passthrough_cancel_cmd()
166      * Only cancel if we're busy so we don't cancel someone else's  in tpm_passthrough_cancel_cmd()
178             error_report("Cannot cancel TPM command due to missing "  in tpm_passthrough_cancel_cmd()
179                          "TPM sysfs cancel entry");  in tpm_passthrough_cancel_cmd()
206  * determine the sysfs cancel file following kernel documentation
208  * From /dev/tpm0 create /sys/class/tpm/tpm0/device/cancel
209  * before 4.0: /sys/class/misc/tpm0/device/cancel
220             error_report("tpm_passthrough: Could not open TPM cancel path: %s",  in tpm_passthrough_open_sysfs_cancel()
234     if (snprintf(path, sizeof(path), "/sys/class/tpm/%s/device/cancel",  in tpm_passthrough_open_sysfs_cancel()
238             if (snprintf(path, sizeof(path), "/sys/class/misc/%s/device/cancel",  in tpm_passthrough_open_sysfs_cancel()
246         error_report("tpm_passthrough: Could not guess TPM cancel path");  in tpm_passthrough_open_sysfs_cancel()
259     value = qemu_opt_get(opts, "cancel-path");  in tpm_passthrough_handle_device_opts()
331         .name = "cancel-path",