aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-x86/kexec.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/kexec.h')
-rw-r--r--include/asm-x86/kexec.h175
1 files changed, 0 insertions, 175 deletions
diff --git a/include/asm-x86/kexec.h b/include/asm-x86/kexec.h
deleted file mode 100644
index 4246ab7dc988..000000000000
--- a/include/asm-x86/kexec.h
+++ /dev/null
@@ -1,175 +0,0 @@
1#ifndef _KEXEC_H
2#define _KEXEC_H
3
4#ifdef CONFIG_X86_32
5# define PA_CONTROL_PAGE 0
6# define VA_CONTROL_PAGE 1
7# define PA_PGD 2
8# define VA_PGD 3
9# define PA_PTE_0 4
10# define VA_PTE_0 5
11# define PA_PTE_1 6
12# define VA_PTE_1 7
13# define PA_SWAP_PAGE 8
14# ifdef CONFIG_X86_PAE
15# define PA_PMD_0 9
16# define VA_PMD_0 10
17# define PA_PMD_1 11
18# define VA_PMD_1 12
19# define PAGES_NR 13
20# else
21# define PAGES_NR 9
22# endif
23#else
24# define PA_CONTROL_PAGE 0
25# define VA_CONTROL_PAGE 1
26# define PA_PGD 2
27# define VA_PGD 3
28# define PA_PUD_0 4
29# define VA_PUD_0 5
30# define PA_PMD_0 6
31# define VA_PMD_0 7
32# define PA_PTE_0 8
33# define VA_PTE_0 9
34# define PA_PUD_1 10
35# define VA_PUD_1 11
36# define PA_PMD_1 12
37# define VA_PMD_1 13
38# define PA_PTE_1 14
39# define VA_PTE_1 15
40# define PA_TABLE_PAGE 16
41# define PAGES_NR 17
42#endif
43
44#ifdef CONFIG_X86_32
45# define KEXEC_CONTROL_CODE_MAX_SIZE 2048
46#endif
47
48#ifndef __ASSEMBLY__
49
50#include <linux/string.h>
51
52#include <asm/page.h>
53#include <asm/ptrace.h>
54
55/*
56 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
57 * I.e. Maximum page that is mapped directly into kernel memory,
58 * and kmap is not required.
59 *
60 * So far x86_64 is limited to 40 physical address bits.
61 */
62#ifdef CONFIG_X86_32
63/* Maximum physical address we can use pages from */
64# define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
65/* Maximum address we can reach in physical address mode */
66# define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
67/* Maximum address we can use for the control code buffer */
68# define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
69
70# define KEXEC_CONTROL_PAGE_SIZE 4096
71
72/* The native architecture */
73# define KEXEC_ARCH KEXEC_ARCH_386
74
75/* We can also handle crash dumps from 64 bit kernel. */
76# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
77#else
78/* Maximum physical address we can use pages from */
79# define KEXEC_SOURCE_MEMORY_LIMIT (0xFFFFFFFFFFUL)
80/* Maximum address we can reach in physical address mode */
81# define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL)
82/* Maximum address we can use for the control pages */
83# define KEXEC_CONTROL_MEMORY_LIMIT (0xFFFFFFFFFFUL)
84
85/* Allocate one page for the pdp and the second for the code */
86# define KEXEC_CONTROL_PAGE_SIZE (4096UL + 4096UL)
87
88/* The native architecture */
89# define KEXEC_ARCH KEXEC_ARCH_X86_64
90#endif
91
92/*
93 * CPU does not save ss and sp on stack if execution is already
94 * running in kernel mode at the time of NMI occurrence. This code
95 * fixes it.
96 */
97static inline void crash_fixup_ss_esp(struct pt_regs *newregs,
98 struct pt_regs *oldregs)
99{
100#ifdef CONFIG_X86_32
101 newregs->sp = (unsigned long)&(oldregs->sp);
102 asm volatile("xorl %%eax, %%eax\n\t"
103 "movw %%ss, %%ax\n\t"
104 :"=a"(newregs->ss));
105#endif
106}
107
108/*
109 * This function is responsible for capturing register states if coming
110 * via panic otherwise just fix up the ss and sp if coming via kernel
111 * mode exception.
112 */
113static inline void crash_setup_regs(struct pt_regs *newregs,
114 struct pt_regs *oldregs)
115{
116 if (oldregs) {
117 memcpy(newregs, oldregs, sizeof(*newregs));
118 crash_fixup_ss_esp(newregs, oldregs);
119 } else {
120#ifdef CONFIG_X86_32
121 asm volatile("movl %%ebx,%0" : "=m"(newregs->bx));
122 asm volatile("movl %%ecx,%0" : "=m"(newregs->cx));
123 asm volatile("movl %%edx,%0" : "=m"(newregs->dx));
124 asm volatile("movl %%esi,%0" : "=m"(newregs->si));
125 asm volatile("movl %%edi,%0" : "=m"(newregs->di));
126 asm volatile("movl %%ebp,%0" : "=m"(newregs->bp));
127 asm volatile("movl %%eax,%0" : "=m"(newregs->ax));
128 asm volatile("movl %%esp,%0" : "=m"(newregs->sp));
129 asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
130 asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
131 asm volatile("movl %%ds, %%eax;" :"=a"(newregs->ds));
132 asm volatile("movl %%es, %%eax;" :"=a"(newregs->es));
133 asm volatile("pushfl; popl %0" :"=m"(newregs->flags));
134#else
135 asm volatile("movq %%rbx,%0" : "=m"(newregs->bx));
136 asm volatile("movq %%rcx,%0" : "=m"(newregs->cx));
137 asm volatile("movq %%rdx,%0" : "=m"(newregs->dx));
138 asm volatile("movq %%rsi,%0" : "=m"(newregs->si));
139 asm volatile("movq %%rdi,%0" : "=m"(newregs->di));
140 asm volatile("movq %%rbp,%0" : "=m"(newregs->bp));
141 asm volatile("movq %%rax,%0" : "=m"(newregs->ax));
142 asm volatile("movq %%rsp,%0" : "=m"(newregs->sp));
143 asm volatile("movq %%r8,%0" : "=m"(newregs->r8));
144 asm volatile("movq %%r9,%0" : "=m"(newregs->r9));
145 asm volatile("movq %%r10,%0" : "=m"(newregs->r10));
146 asm volatile("movq %%r11,%0" : "=m"(newregs->r11));
147 asm volatile("movq %%r12,%0" : "=m"(newregs->r12));
148 asm volatile("movq %%r13,%0" : "=m"(newregs->r13));
149 asm volatile("movq %%r14,%0" : "=m"(newregs->r14));
150 asm volatile("movq %%r15,%0" : "=m"(newregs->r15));
151 asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
152 asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
153 asm volatile("pushfq; popq %0" :"=m"(newregs->flags));
154#endif
155 newregs->ip = (unsigned long)current_text_addr();
156 }
157}
158
159#ifdef CONFIG_X86_32
160asmlinkage unsigned long
161relocate_kernel(unsigned long indirection_page,
162 unsigned long control_page,
163 unsigned long start_address,
164 unsigned int has_pae,
165 unsigned int preserve_context);
166#else
167NORET_TYPE void
168relocate_kernel(unsigned long indirection_page,
169 unsigned long page_list,
170 unsigned long start_address) ATTRIB_NORET;
171#endif
172
173#endif /* __ASSEMBLY__ */
174
175#endif /* _KEXEC_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-02 09:52:41 -0500