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 if (image->type == KEXEC_TYPE_CRASH) 28 buf.mem += crashk_res.start; 29 buf.memsz = buf.bufsz; 30 31 data->kernel_buf = image->kernel_buf; 32 data->kernel_mem = buf.mem; 33 data->parm = image->kernel_buf + PARMAREA; 34 data->memsz += buf.memsz; 35 36 ipl_report_add_component(data->report, &buf, 37 IPL_RB_COMPONENT_FLAG_SIGNED | 38 IPL_RB_COMPONENT_FLAG_VERIFIED, 39 IPL_RB_CERT_UNKNOWN); 40 return kexec_add_buffer(&buf); 41 } 42 43 static void *s390_image_load(struct kimage *image, 44 char *kernel, unsigned long kernel_len, 45 char *initrd, unsigned long initrd_len, 46 char *cmdline, unsigned long cmdline_len) 47 { 48 return kexec_file_add_components(image, kexec_file_add_kernel_image); 49 } 50 51 static int s390_image_probe(const char *buf, unsigned long len) 52 { 53 /* Can't reliably tell if an image is valid. Therefore give the 54 * user whatever he wants. 55 */ 56 return 0; 57 } 58 59 const struct kexec_file_ops s390_kexec_image_ops = { 60 .probe = s390_image_probe, 61 .load = s390_image_load, 62 #ifdef CONFIG_KEXEC_SIG 63 .verify_sig = s390_verify_sig, 64 #endif /* CONFIG_KEXEC_SIG */ 65 }; 66