mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
202 lines
5.7 KiB
202 lines
5.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _ASM_X86_KEXEC_H |
|
#define _ASM_X86_KEXEC_H |
|
|
|
#ifdef CONFIG_X86_32 |
|
# define PA_CONTROL_PAGE 0 |
|
# define VA_CONTROL_PAGE 1 |
|
# define PA_PGD 2 |
|
# define PA_SWAP_PAGE 3 |
|
# define PAGES_NR 4 |
|
#else |
|
# define PA_CONTROL_PAGE 0 |
|
# define VA_CONTROL_PAGE 1 |
|
# define PA_TABLE_PAGE 2 |
|
# define PA_SWAP_PAGE 3 |
|
# define PAGES_NR 4 |
|
#endif |
|
|
|
# define KEXEC_CONTROL_CODE_MAX_SIZE 2048 |
|
|
|
#ifndef __ASSEMBLY__ |
|
|
|
#include <linux/string.h> |
|
#include <linux/kernel.h> |
|
|
|
#include <asm/page.h> |
|
#include <asm/ptrace.h> |
|
#include <asm/bootparam.h> |
|
|
|
struct kimage; |
|
|
|
/* |
|
* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. |
|
* I.e. Maximum page that is mapped directly into kernel memory, |
|
* and kmap is not required. |
|
* |
|
* So far x86_64 is limited to 40 physical address bits. |
|
*/ |
|
#ifdef CONFIG_X86_32 |
|
/* Maximum physical address we can use pages from */ |
|
# define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) |
|
/* Maximum address we can reach in physical address mode */ |
|
# define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) |
|
/* Maximum address we can use for the control code buffer */ |
|
# define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE |
|
|
|
# define KEXEC_CONTROL_PAGE_SIZE 4096 |
|
|
|
/* The native architecture */ |
|
# define KEXEC_ARCH KEXEC_ARCH_386 |
|
|
|
/* We can also handle crash dumps from 64 bit kernel. */ |
|
# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64) |
|
#else |
|
/* Maximum physical address we can use pages from */ |
|
# define KEXEC_SOURCE_MEMORY_LIMIT (MAXMEM-1) |
|
/* Maximum address we can reach in physical address mode */ |
|
# define KEXEC_DESTINATION_MEMORY_LIMIT (MAXMEM-1) |
|
/* Maximum address we can use for the control pages */ |
|
# define KEXEC_CONTROL_MEMORY_LIMIT (MAXMEM-1) |
|
|
|
/* Allocate one page for the pdp and the second for the code */ |
|
# define KEXEC_CONTROL_PAGE_SIZE (4096UL + 4096UL) |
|
|
|
/* The native architecture */ |
|
# define KEXEC_ARCH KEXEC_ARCH_X86_64 |
|
#endif |
|
|
|
/* |
|
* This function is responsible for capturing register states if coming |
|
* via panic otherwise just fix up the ss and sp if coming via kernel |
|
* mode exception. |
|
*/ |
|
static inline void crash_setup_regs(struct pt_regs *newregs, |
|
struct pt_regs *oldregs) |
|
{ |
|
if (oldregs) { |
|
memcpy(newregs, oldregs, sizeof(*newregs)); |
|
} else { |
|
#ifdef CONFIG_X86_32 |
|
asm volatile("movl %%ebx,%0" : "=m"(newregs->bx)); |
|
asm volatile("movl %%ecx,%0" : "=m"(newregs->cx)); |
|
asm volatile("movl %%edx,%0" : "=m"(newregs->dx)); |
|
asm volatile("movl %%esi,%0" : "=m"(newregs->si)); |
|
asm volatile("movl %%edi,%0" : "=m"(newregs->di)); |
|
asm volatile("movl %%ebp,%0" : "=m"(newregs->bp)); |
|
asm volatile("movl %%eax,%0" : "=m"(newregs->ax)); |
|
asm volatile("movl %%esp,%0" : "=m"(newregs->sp)); |
|
asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss)); |
|
asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs)); |
|
asm volatile("movl %%ds, %%eax;" :"=a"(newregs->ds)); |
|
asm volatile("movl %%es, %%eax;" :"=a"(newregs->es)); |
|
asm volatile("pushfl; popl %0" :"=m"(newregs->flags)); |
|
#else |
|
asm volatile("movq %%rbx,%0" : "=m"(newregs->bx)); |
|
asm volatile("movq %%rcx,%0" : "=m"(newregs->cx)); |
|
asm volatile("movq %%rdx,%0" : "=m"(newregs->dx)); |
|
asm volatile("movq %%rsi,%0" : "=m"(newregs->si)); |
|
asm volatile("movq %%rdi,%0" : "=m"(newregs->di)); |
|
asm volatile("movq %%rbp,%0" : "=m"(newregs->bp)); |
|
asm volatile("movq %%rax,%0" : "=m"(newregs->ax)); |
|
asm volatile("movq %%rsp,%0" : "=m"(newregs->sp)); |
|
asm volatile("movq %%r8,%0" : "=m"(newregs->r8)); |
|
asm volatile("movq %%r9,%0" : "=m"(newregs->r9)); |
|
asm volatile("movq %%r10,%0" : "=m"(newregs->r10)); |
|
asm volatile("movq %%r11,%0" : "=m"(newregs->r11)); |
|
asm volatile("movq %%r12,%0" : "=m"(newregs->r12)); |
|
asm volatile("movq %%r13,%0" : "=m"(newregs->r13)); |
|
asm volatile("movq %%r14,%0" : "=m"(newregs->r14)); |
|
asm volatile("movq %%r15,%0" : "=m"(newregs->r15)); |
|
asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss)); |
|
asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs)); |
|
asm volatile("pushfq; popq %0" :"=m"(newregs->flags)); |
|
#endif |
|
newregs->ip = _THIS_IP_; |
|
} |
|
} |
|
|
|
#ifdef CONFIG_X86_32 |
|
asmlinkage unsigned long |
|
relocate_kernel(unsigned long indirection_page, |
|
unsigned long control_page, |
|
unsigned long start_address, |
|
unsigned int has_pae, |
|
unsigned int preserve_context); |
|
#else |
|
unsigned long |
|
relocate_kernel(unsigned long indirection_page, |
|
unsigned long page_list, |
|
unsigned long start_address, |
|
unsigned int preserve_context, |
|
unsigned int sme_active); |
|
#endif |
|
|
|
#define ARCH_HAS_KIMAGE_ARCH |
|
|
|
#ifdef CONFIG_X86_32 |
|
struct kimage_arch { |
|
pgd_t *pgd; |
|
#ifdef CONFIG_X86_PAE |
|
pmd_t *pmd0; |
|
pmd_t *pmd1; |
|
#endif |
|
pte_t *pte0; |
|
pte_t *pte1; |
|
}; |
|
#else |
|
struct kimage_arch { |
|
p4d_t *p4d; |
|
pud_t *pud; |
|
pmd_t *pmd; |
|
pte_t *pte; |
|
|
|
/* Core ELF header buffer */ |
|
void *elf_headers; |
|
unsigned long elf_headers_sz; |
|
unsigned long elf_load_addr; |
|
}; |
|
#endif /* CONFIG_X86_32 */ |
|
|
|
#ifdef CONFIG_X86_64 |
|
/* |
|
* Number of elements and order of elements in this structure should match |
|
* with the ones in arch/x86/purgatory/entry64.S. If you make a change here |
|
* make an appropriate change in purgatory too. |
|
*/ |
|
struct kexec_entry64_regs { |
|
uint64_t rax; |
|
uint64_t rcx; |
|
uint64_t rdx; |
|
uint64_t rbx; |
|
uint64_t rsp; |
|
uint64_t rbp; |
|
uint64_t rsi; |
|
uint64_t rdi; |
|
uint64_t r8; |
|
uint64_t r9; |
|
uint64_t r10; |
|
uint64_t r11; |
|
uint64_t r12; |
|
uint64_t r13; |
|
uint64_t r14; |
|
uint64_t r15; |
|
uint64_t rip; |
|
}; |
|
|
|
extern int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, |
|
gfp_t gfp); |
|
#define arch_kexec_post_alloc_pages arch_kexec_post_alloc_pages |
|
|
|
extern void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages); |
|
#define arch_kexec_pre_free_pages arch_kexec_pre_free_pages |
|
|
|
#endif |
|
|
|
typedef void crash_vmclear_fn(void); |
|
extern crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss; |
|
extern void kdump_nmi_shootdown_cpus(void); |
|
|
|
#endif /* __ASSEMBLY__ */ |
|
|
|
#endif /* _ASM_X86_KEXEC_H */
|
|
|