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Sat, 25 Jul 2020 00:22:34 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 99F05B2068; Sat, 25 Jul 2020 00:22:34 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Sat, 25 Jul 2020 00:22:34 +0000 (GMT) From: Stefan Berger To: qemu-devel@nongnu.org Subject: [PULL v1 2/3] tpm: Improve help on TPM types when none are available Date: Fri, 24 Jul 2020 20:22:27 -0400 Message-Id: <20200725002228.2629410-3-stefanb@linux.vnet.ibm.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200725002228.2629410-1-stefanb@linux.vnet.ibm.com> References: <20200725002228.2629410-1-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-24_10:2020-07-24, 2020-07-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 adultscore=0 priorityscore=1501 lowpriorityscore=0 mlxscore=0 bulkscore=0 impostorscore=0 spamscore=0 clxscore=1015 malwarescore=0 phishscore=0 suspectscore=1 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007240162 Received-SPF: none client-ip=148.163.158.5; envelope-from=stefanb@linux.vnet.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 19:07:46 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Markus Armbruster , Stefan Berger Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Markus Armbruster Help is a bit awkward when no TPM types are built into QEMU: $ qemu-system-x86_64 -tpmdev nonexistent,id=tpm0 qemu-system-x86_64: -tpmdev nonexistent,id=tpm0: Parameter 'type' expects a TPM backend type Supported TPM types (choose only one): Improve to qemu-system-x86_64: -tpmdev nonexistent,id=tpm0: Parameter 'type' expects a TPM backend type No TPM backend types are available Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Stefan Berger Signed-off-by: Stefan Berger --- tpm.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/tpm.c b/tpm.c index f6045bb6da..cab206355a 100644 --- a/tpm.c +++ b/tpm.c @@ -47,18 +47,23 @@ tpm_be_find_by_type(enum TpmType type) */ static void tpm_display_backend_drivers(void) { + bool got_one = false; int i; - fprintf(stderr, "Supported TPM types (choose only one):\n"); - for (i = 0; i < TPM_TYPE__MAX; i++) { const TPMBackendClass *bc = tpm_be_find_by_type(i); if (!bc) { continue; } - fprintf(stderr, "%12s %s\n", TpmType_str(i), bc->desc); + if (!got_one) { + error_printf("Supported TPM types (choose only one):\n"); + got_one = true; + } + error_printf("%12s %s\n", TpmType_str(i), bc->desc); + } + if (!got_one) { + error_printf("No TPM backend types are available\n"); } - fprintf(stderr, "\n"); } /*