1
2#ifndef _ASM_X86_KEXEC_H
3#define _ASM_X86_KEXEC_H
4
5#ifdef CONFIG_X86_32
6# define PA_CONTROL_PAGE 0
7# define VA_CONTROL_PAGE 1
8# define PA_PGD 2
9# define PA_SWAP_PAGE 3
10# define PAGES_NR 4
11#else
12# define PA_CONTROL_PAGE 0
13# define VA_CONTROL_PAGE 1
14# define PA_TABLE_PAGE 2
15# define PA_SWAP_PAGE 3
16# define PAGES_NR 4
17#endif
18
19# define KEXEC_CONTROL_CODE_MAX_SIZE 2048
20
21#ifndef __ASSEMBLY__
22
23#include <linux/string.h>
24#include <linux/kernel.h>
25
26#include <asm/page.h>
27#include <asm/ptrace.h>
28#include <asm/bootparam.h>
29
30struct kimage;
31
32
33
34
35
36
37
38
39#ifdef CONFIG_X86_32
40
41# define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
42
43# define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
44
45# define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
46
47# define KEXEC_CONTROL_PAGE_SIZE 4096
48
49
50# define KEXEC_ARCH KEXEC_ARCH_386
51
52
53# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
54#else
55
56# define KEXEC_SOURCE_MEMORY_LIMIT (MAXMEM-1)
57
58# define KEXEC_DESTINATION_MEMORY_LIMIT (MAXMEM-1)
59
60# define KEXEC_CONTROL_MEMORY_LIMIT (MAXMEM-1)
61
62
63# define KEXEC_CONTROL_PAGE_SIZE (4096UL + 4096UL)
64
65
66# define KEXEC_ARCH KEXEC_ARCH_X86_64
67#endif
68
69
70
71
72
73
74static inline void crash_setup_regs(struct pt_regs *newregs,
75 struct pt_regs *oldregs)
76{
77 if (oldregs) {
78 memcpy(newregs, oldregs, sizeof(*newregs));
79 } else {
80#ifdef CONFIG_X86_32
81 asm volatile("movl %%ebx,%0" : "=m"(newregs->bx));
82 asm volatile("movl %%ecx,%0" : "=m"(newregs->cx));
83 asm volatile("movl %%edx,%0" : "=m"(newregs->dx));
84 asm volatile("movl %%esi,%0" : "=m"(newregs->si));
85 asm volatile("movl %%edi,%0" : "=m"(newregs->di));
86 asm volatile("movl %%ebp,%0" : "=m"(newregs->bp));
87 asm volatile("movl %%eax,%0" : "=m"(newregs->ax));
88 asm volatile("movl %%esp,%0" : "=m"(newregs->sp));
89 asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
90 asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
91 asm volatile("movl %%ds, %%eax;" :"=a"(newregs->ds));
92 asm volatile("movl %%es, %%eax;" :"=a"(newregs->es));
93 asm volatile("pushfl; popl %0" :"=m"(newregs->flags));
94#else
95 asm volatile("movq %%rbx,%0" : "=m"(newregs->bx));
96 asm volatile("movq %%rcx,%0" : "=m"(newregs->cx));
97 asm volatile("movq %%rdx,%0" : "=m"(newregs->dx));
98 asm volatile("movq %%rsi,%0" : "=m"(newregs->si));
99 asm volatile("movq %%rdi,%0" : "=m"(newregs->di));
100 asm volatile("movq %%rbp,%0" : "=m"(newregs->bp));
101 asm volatile("movq %%rax,%0" : "=m"(newregs->ax));
102 asm volatile("movq %%rsp,%0" : "=m"(newregs->sp));
103 asm volatile("movq %%r8,%0" : "=m"(newregs->r8));
104 asm volatile("movq %%r9,%0" : "=m"(newregs->r9));
105 asm volatile("movq %%r10,%0" : "=m"(newregs->r10));
106 asm volatile("movq %%r11,%0" : "=m"(newregs->r11));
107 asm volatile("movq %%r12,%0" : "=m"(newregs->r12));
108 asm volatile("movq %%r13,%0" : "=m"(newregs->r13));
109 asm volatile("movq %%r14,%0" : "=m"(newregs->r14));
110 asm volatile("movq %%r15,%0" : "=m"(newregs->r15));
111 asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
112 asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
113 asm volatile("pushfq; popq %0" :"=m"(newregs->flags));
114#endif
115 newregs->ip = _THIS_IP_;
116 }
117}
118
119#ifdef CONFIG_X86_32
120asmlinkage unsigned long
121relocate_kernel(unsigned long indirection_page,
122 unsigned long control_page,
123 unsigned long start_address,
124 unsigned int has_pae,
125 unsigned int preserve_context);
126#else
127unsigned long
128relocate_kernel(unsigned long indirection_page,
129 unsigned long page_list,
130 unsigned long start_address,
131 unsigned int preserve_context,
132 unsigned int sme_active);
133#endif
134
135#define ARCH_HAS_KIMAGE_ARCH
136
137#ifdef CONFIG_X86_32
138struct kimage_arch {
139 pgd_t *pgd;
140#ifdef CONFIG_X86_PAE
141 pmd_t *pmd0;
142 pmd_t *pmd1;
143#endif
144 pte_t *pte0;
145 pte_t *pte1;
146};
147#else
148struct kimage_arch {
149 p4d_t *p4d;
150 pud_t *pud;
151 pmd_t *pmd;
152 pte_t *pte;
153
154
155 void *elf_headers;
156 unsigned long elf_headers_sz;
157 unsigned long elf_load_addr;
158};
159#endif
160
161#ifdef CONFIG_X86_64
162
163
164
165
166
167struct kexec_entry64_regs {
168 uint64_t rax;
169 uint64_t rcx;
170 uint64_t rdx;
171 uint64_t rbx;
172 uint64_t rsp;
173 uint64_t rbp;
174 uint64_t rsi;
175 uint64_t rdi;
176 uint64_t r8;
177 uint64_t r9;
178 uint64_t r10;
179 uint64_t r11;
180 uint64_t r12;
181 uint64_t r13;
182 uint64_t r14;
183 uint64_t r15;
184 uint64_t rip;
185};
186
187extern int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages,
188 gfp_t gfp);
189#define arch_kexec_post_alloc_pages arch_kexec_post_alloc_pages
190
191extern void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages);
192#define arch_kexec_pre_free_pages arch_kexec_pre_free_pages
193
194#endif
195
196typedef void crash_vmclear_fn(void);
197extern crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss;
198extern void kdump_nmi_shootdown_cpus(void);
199
200#endif
201
202#endif
203