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// SPDX-License-Identifier: GPL-2.0-only
/*
* ppc64 code to implement the kexec_file_load syscall
*
* Copyright (C) 2004 Adam Litke (agl@us.ibm.com)
* Copyright (C) 2004 IBM Corp.
* Copyright (C) 2004,2005 Milton D Miller II, IBM Corporation
* Copyright (C) 2005 R Sharada (sharada@in.ibm.com)
* Copyright (C) 2006 Mohan Kumar M (mohan@in.ibm.com)
* Copyright (C) 2020 IBM Corporation
*
* Based on kexec-tools' kexec-ppc64.c, kexec-elf-rel-ppc64.c, fs2dt.c.
* Heavily modified for the kernel by
* Hari Bathini, IBM Corporation.
*/
#include <linux/kexec.h>
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
const struct kexec_file_ops * const kexec_file_loaders[] = {
&kexec_elf64_ops,
NULL
};
/**
* setup_purgatory_ppc64 - initialize PPC64 specific purgatory's global
* variables and call setup_purgatory() to initialize
* common global variable.
* @image: kexec image.
* @slave_code: Slave code for the purgatory.
* @fdt: Flattened device tree for the next kernel.
* @kernel_load_addr: Address where the kernel is loaded.
* @fdt_load_addr: Address where the flattened device tree is loaded.
*
* Returns 0 on success, negative errno on error.
*/
int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
const void *fdt, unsigned long kernel_load_addr,
unsigned long fdt_load_addr)
{
int ret;
ret = setup_purgatory(image, slave_code, fdt, kernel_load_addr,
fdt_load_addr);
if (ret)
pr_err("Failed to setup purgatory symbols");
return ret;
}
/**
* setup_new_fdt_ppc64 - Update the flattend device-tree of the kernel
* being loaded.
* @image: kexec image being loaded.
* @fdt: Flattened device tree for the next kernel.
* @initrd_load_addr: Address where the next initrd will be loaded.
* @initrd_len: Size of the next initrd, or 0 if there will be none.
* @cmdline: Command line for the next kernel, or NULL if there will
* be none.
*
* Returns 0 on success, negative errno on error.
*/
int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
unsigned long initrd_load_addr,
unsigned long initrd_len, const char *cmdline)
{
return setup_new_fdt(image, fdt, initrd_load_addr, initrd_len, cmdline);
}
/**
* arch_kexec_kernel_image_probe - Does additional handling needed to setup
* kexec segments.
* @image: kexec image being loaded.
* @buf: Buffer pointing to elf data.
* @buf_len: Length of the buffer.
*
* Returns 0 on success, negative errno on error.
*/
int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
unsigned long buf_len)
{
/* We don't support crash kernels yet. */
if (image->type == KEXEC_TYPE_CRASH)
return -EOPNOTSUPP;
return kexec_image_probe_default(image, buf, buf_len);
}
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