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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
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/*
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* Copyright (C) 2016 Imagination Technologies
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* Author: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kexec.h>
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#include <linux/libfdt.h>
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#include <linux/uaccess.h>
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static int generic_kexec_prepare(struct kimage *image)
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{
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int i;
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for (i = 0; i < image->nr_segments; i++) {
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struct fdt_header fdt;
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if (image->segment[i].memsz <= sizeof(fdt))
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continue;
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if (copy_from_user(&fdt, image->segment[i].buf, sizeof(fdt)))
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continue;
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if (fdt_check_header(&fdt))
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continue;
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kexec_args[0] = -2;
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kexec_args[1] = (unsigned long)
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phys_to_virt((unsigned long)image->segment[i].mem);
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break;
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}
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return 0;
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}
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static int __init register_generic_kexec(void)
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{
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_machine_kexec_prepare = generic_kexec_prepare;
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return 0;
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}
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arch_initcall(register_generic_kexec);
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