linux/arch/x86/include/asm/crash_reserve.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _X86_CRASH_RESERVE_H
#define _X86_CRASH_RESERVE_H

/* 16M alignment for crash kernel regions */
#define CRASH_ALIGN …

/*
 * Keep the crash kernel below this limit.
 *
 * Earlier 32-bits kernels would limit the kernel to the low 512 MB range
 * due to mapping restrictions.
 *
 * 64-bit kdump kernels need to be restricted to be under 64 TB, which is
 * the upper limit of system RAM in 4-level paging mode. Since the kdump
 * jump could be from 5-level paging to 4-level paging, the jump will fail if
 * the kernel is put above 64 TB, and during the 1st kernel bootup there's
 * no good way to detect the paging mode of the target kernel which will be
 * loaded for dumping.
 */
extern unsigned long swiotlb_size_or_default(void);

#ifdef CONFIG_X86_32
#define CRASH_ADDR_LOW_MAX …
#define CRASH_ADDR_HIGH_MAX …
#else
#define CRASH_ADDR_LOW_MAX …
#define CRASH_ADDR_HIGH_MAX …
#endif

#define DEFAULT_CRASH_KERNEL_LOW_SIZE …

static inline unsigned long crash_low_size_default(void)
{ … }

#define HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY

#endif /* _X86_CRASH_RESERVE_H */