cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kexec.h (2638B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright IBM Corp. 2005
      4 *
      5 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
      6 *
      7 */
      8
      9#ifndef _S390_KEXEC_H
     10#define _S390_KEXEC_H
     11
     12#include <linux/module.h>
     13
     14#include <asm/processor.h>
     15#include <asm/page.h>
     16#include <asm/setup.h>
     17/*
     18 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
     19 * I.e. Maximum page that is mapped directly into kernel memory,
     20 * and kmap is not required.
     21 */
     22
     23/* Maximum physical address we can use pages from */
     24#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
     25
     26/* Maximum address we can reach in physical address mode */
     27#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
     28
     29/* Maximum address we can use for the control pages */
     30/* Not more than 2GB */
     31#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
     32
     33/* Allocate control page with GFP_DMA */
     34#define KEXEC_CONTROL_MEMORY_GFP (GFP_DMA | __GFP_NORETRY)
     35
     36/* Maximum address we can use for the crash control pages */
     37#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
     38
     39/* Allocate one page for the pdp and the second for the code */
     40#define KEXEC_CONTROL_PAGE_SIZE 4096
     41
     42/* Alignment of crashkernel memory */
     43#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
     44
     45/* The native architecture */
     46#define KEXEC_ARCH KEXEC_ARCH_S390
     47
     48/* Allow kexec_file to load a segment to 0 */
     49#define KEXEC_BUF_MEM_UNKNOWN -1
     50
     51/* Provide a dummy definition to avoid build failures. */
     52static inline void crash_setup_regs(struct pt_regs *newregs,
     53					struct pt_regs *oldregs) { }
     54
     55struct kimage;
     56struct s390_load_data {
     57	/* Pointer to the kernel buffer. Used to register cmdline etc.. */
     58	void *kernel_buf;
     59
     60	/* Load address of the kernel_buf. */
     61	unsigned long kernel_mem;
     62
     63	/* Parmarea in the kernel buffer. */
     64	struct parmarea *parm;
     65
     66	/* Total size of loaded segments in memory. Used as an offset. */
     67	size_t memsz;
     68
     69	struct ipl_report *report;
     70};
     71
     72int s390_verify_sig(const char *kernel, unsigned long kernel_len);
     73void *kexec_file_add_components(struct kimage *image,
     74				int (*add_kernel)(struct kimage *image,
     75						  struct s390_load_data *data));
     76int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val,
     77			 unsigned long addr);
     78
     79#define ARCH_HAS_KIMAGE_ARCH
     80
     81struct kimage_arch {
     82	void *ipl_buf;
     83};
     84
     85extern const struct kexec_file_ops s390_kexec_image_ops;
     86extern const struct kexec_file_ops s390_kexec_elf_ops;
     87
     88#ifdef CONFIG_KEXEC_FILE
     89struct purgatory_info;
     90int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
     91				     Elf_Shdr *section,
     92				     const Elf_Shdr *relsec,
     93				     const Elf_Shdr *symtab);
     94#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
     95#endif
     96#endif /*_S390_KEXEC_H */