mirror of https://gitee.com/openkylin/linux.git
88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
|
// 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);
|
||
|
|
}
|