linux/arch/x86/kernel/crash_dump_64.c

// SPDX-License-Identifier: GPL-2.0
/*
 *	Memory preserving reboot related code.
 *
 *	Created by: Hariprasad Nellitheertha ([email protected])
 *	Copyright (C) IBM Corporation, 2004. All rights reserved
 */

#include <linux/errno.h>
#include <linux/crash_dump.h>
#include <linux/uio.h>
#include <linux/io.h>
#include <linux/cc_platform.h>

static ssize_t __copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
				  size_t csize, unsigned long offset,
				  bool encrypted)
{ … }

ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn, size_t csize,
			 unsigned long offset)
{ … }

/*
 * copy_oldmem_page_encrypted - same as copy_oldmem_page() above but ioremap the
 * memory with the encryption mask set to accommodate kdump on SME-enabled
 * machines.
 */
ssize_t copy_oldmem_page_encrypted(struct iov_iter *iter, unsigned long pfn,
				   size_t csize, unsigned long offset)
{ … }

ssize_t elfcorehdr_read(char *buf, size_t count, u64 *ppos)
{ … }