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Tue, 8 Apr 2025 15:55:52 +0000 (GMT) From: Zhuoying Cai To: thuth@redhat.com, richard.henderson@linaro.org, david@redhat.com, pbonzini@redhat.com Cc: walling@linux.ibm.com, jjherne@linux.ibm.com, jrossi@linux.ibm.com, fiuczy@linux.ibm.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, iii@linux.ibm.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org, zycai@linux.ibm.com Subject: [PATCH v1 15/24] pc-bios/s390-ccw: Refactor zipl_run() Date: Tue, 8 Apr 2025 11:55:17 -0400 Message-ID: <20250408155527.123341-16-zycai@linux.ibm.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408155527.123341-1-zycai@linux.ibm.com> References: <20250408155527.123341-1-zycai@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: TTrIdDISqhBkvdlDzmqNJpwvocvTkMUs X-Proofpoint-ORIG-GUID: TTrIdDISqhBkvdlDzmqNJpwvocvTkMUs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-08_06,2025-04-08_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 clxscore=1015 malwarescore=0 mlxscore=0 priorityscore=1501 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504080107 Received-SPF: pass client-ip=148.163.156.1; envelope-from=zycai@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Tue, 08 Apr 2025 12:17:35 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Refactor to enhance readability before enabling secure IPL in later patches. Signed-off-by: Zhuoying Cai --- pc-bios/s390-ccw/bootmap.c | 58 ++++++++++++++++++++++---------------- 1 file changed, 34 insertions(+), 24 deletions(-) diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index 0f8baa0198..485b55f1bf 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -674,6 +674,38 @@ static int zipl_load_segment(ComponentEntry *entry) return 0; } +static int zipl_run_normal(ComponentEntry *entry, uint8_t *tmp_sec) +{ + while (entry->component_type == ZIPL_COMP_ENTRY_LOAD || + entry->component_type == ZIPL_COMP_ENTRY_SIGNATURE) { + + /* Secure boot is off, so we skip signature entries */ + if (entry->component_type == ZIPL_COMP_ENTRY_SIGNATURE) { + entry++; + continue; + } + + if (zipl_load_segment(entry)) { + return -1; + } + + entry++; + + if ((uint8_t *)(&entry[1]) > (tmp_sec + MAX_SECTOR_SIZE)) { + puts("Wrong entry value"); + return -EINVAL; + } + } + + if (entry->component_type != ZIPL_COMP_ENTRY_EXEC) { + puts("No EXEC entry"); + return -EINVAL; + } + + write_reset_psw(entry->compdat.load_psw); + return 0; +} + /* Run a zipl program */ static int zipl_run(ScsiBlockPtr *pte) { @@ -700,34 +732,12 @@ static int zipl_run(ScsiBlockPtr *pte) /* Load image(s) into RAM */ entry = (ComponentEntry *)(&header[1]); - while (entry->component_type == ZIPL_COMP_ENTRY_LOAD || - entry->component_type == ZIPL_COMP_ENTRY_SIGNATURE) { - - /* We don't support secure boot yet, so we skip signature entries */ - if (entry->component_type == ZIPL_COMP_ENTRY_SIGNATURE) { - entry++; - continue; - } - - if (zipl_load_segment(entry)) { - return -1; - } - entry++; - - if ((uint8_t *)(&entry[1]) > (tmp_sec + MAX_SECTOR_SIZE)) { - puts("Wrong entry value"); - return -EINVAL; - } - } - - if (entry->component_type != ZIPL_COMP_ENTRY_EXEC) { - puts("No EXEC entry"); - return -EINVAL; + if (zipl_run_normal(entry, tmp_sec)) { + return -1; } /* should not return */ - write_reset_psw(entry->compdat.load_psw); jump_to_IPL_code(0); return -1; }