1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Image loader for kexec_file_load system call. 4 * 5 * Copyright IBM Corp. 2018 6 * 7 * Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com> 8 */ 9 10 #include <linux/errno.h> 11 #include <linux/kernel.h> 12 #include <linux/kexec.h> 13 #include <asm/ipl.h> 14 #include <asm/setup.h> 15 16 static int kexec_file_add_kernel_image(struct kimage *image, 17 struct s390_load_data *data) 18 { 19 struct kexec_buf buf; 20 21 buf.image = image; 22 23 buf.buffer = image->kernel_buf; 24 buf.bufsz = image->kernel_buf_len; 25 26 buf.mem = 0; 27 #ifdef CONFIG_CRASH_DUMP 28 if (image->type == KEXEC_TYPE_CRASH) 29 buf.mem += crashk_res.start; 30 #endif 31 buf.memsz = buf.bufsz; 32 33 data->kernel_buf = image->kernel_buf; 34 data->kernel_mem = buf.mem; 35 data->parm = image->kernel_buf + PARMAREA; 36 data->memsz += buf.memsz; 37 38 ipl_report_add_component(data->report, &buf, 39 IPL_RB_COMPONENT_FLAG_SIGNED | 40 IPL_RB_COMPONENT_FLAG_VERIFIED, 41 IPL_RB_CERT_UNKNOWN); 42 return kexec_add_buffer(&buf); 43 } 44 45 static void *s390_image_load(struct kimage *image, 46 char *kernel, unsigned long kernel_len, 47 char *initrd, unsigned long initrd_len, 48 char *cmdline, unsigned long cmdline_len) 49 { 50 return kexec_file_add_components(image, kexec_file_add_kernel_image); 51 } 52 53 static int s390_image_probe(const char *buf, unsigned long len) 54 { 55 /* Can't reliably tell if an image is valid. Therefore give the 56 * user whatever he wants. 57 */ 58 return 0; 59 } 60 61 const struct kexec_file_ops s390_kexec_image_ops = { 62 .probe = s390_image_probe, 63 .load = s390_image_load, 64 #ifdef CONFIG_KEXEC_SIG 65 .verify_sig = s390_verify_sig, 66 #endif /* CONFIG_KEXEC_SIG */ 67 }; 68