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// 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;
if (image->type == KEXEC_TYPE_CRASH)
buf.mem += crashk_res.start;
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;
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,
};
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