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