77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Image loader for kexec_file_load system call.
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*
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* Copyright IBM Corp. 2018
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*
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* Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com>
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/kexec.h>
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#include <asm/setup.h>
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static int kexec_file_add_image_kernel(struct kimage *image,
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struct s390_load_data *data,
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char *kernel, unsigned long kernel_len)
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{
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struct kexec_buf buf;
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int ret;
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buf.image = image;
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buf.buffer = kernel + STARTUP_NORMAL_OFFSET;
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buf.bufsz = kernel_len - STARTUP_NORMAL_OFFSET;
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buf.mem = STARTUP_NORMAL_OFFSET;
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if (image->type == KEXEC_TYPE_CRASH)
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buf.mem += crashk_res.start;
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buf.memsz = buf.bufsz;
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ret = kexec_add_buffer(&buf);
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data->kernel_buf = kernel;
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data->memsz += buf.memsz + STARTUP_NORMAL_OFFSET;
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return ret;
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}
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static void *s390_image_load(struct kimage *image,
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char *kernel, unsigned long kernel_len,
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char *initrd, unsigned long initrd_len,
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char *cmdline, unsigned long cmdline_len)
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{
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struct s390_load_data data = {0};
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int ret;
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ret = kexec_file_add_image_kernel(image, &data, kernel, kernel_len);
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if (ret)
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return ERR_PTR(ret);
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if (initrd) {
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ret = kexec_file_add_initrd(image, &data, initrd, initrd_len);
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if (ret)
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return ERR_PTR(ret);
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}
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ret = kexec_file_add_purgatory(image, &data);
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if (ret)
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return ERR_PTR(ret);
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return kexec_file_update_kernel(image, &data);
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}
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static int s390_image_probe(const char *buf, unsigned long len)
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{
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/* Can't reliably tell if an image is valid. Therefore give the
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* user whatever he wants.
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*/
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return 0;
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}
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const struct kexec_file_ops s390_kexec_image_ops = {
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.probe = s390_image_probe,
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.load = s390_image_load,
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};
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