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 16static 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 45static 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 53static 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 61const 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