kvm/test/x86/vm.h

   1 #ifndef VM_H
   2 #define VM_H
   3
   4 #define PAGE_SIZE 4096ul
   5 #ifdef __x86_64__
   6 #define LARGE_PAGE_SIZE (512 * PAGE_SIZE)
   7 #else
   8 #define LARGE_PAGE_SIZE (1024 * PAGE_SIZE)
   9 #endif
  10
  11 #define PTE_PRESENT (1ull << 0)
  12 #define PTE_PSE     (1ull << 7)
  13 #define PTE_WRITE   (1ull << 1)
  14 #define PTE_ADDR    (0xffffffffff000ull)
  15
  16 void setup_vm();
  17
  18 void *vmalloc(unsigned long size);
  19 void vfree(void *mem);
  20 void *vmap(unsigned long long phys, unsigned long size);
  21
  22 void install_pte(unsigned long *cr3,
  23                         int pte_level,
  24                         void *virt,
  25                         unsigned long pte,
  26                         unsigned long *pt_page);
  27
  28 void *alloc_page();
  29
  30 void install_large_page(unsigned long *cr3,unsigned long phys,
  31                                void *virt);
  32 void install_page(unsigned long *cr3, unsigned long phys, void *virt);
  33
  34 static inline unsigned long virt_to_phys(const void *virt)
  35 {
  36     return (unsigned long)virt;
  37 }
  38
  39 static inline void *phys_to_virt(unsigned long phys)
  40 {
  41     return (void *)phys;
  42 }
  43
  44
  45 static inline void load_cr3(unsigned long cr3)
  46 {
  47     asm ( "mov %0, %%cr3" : : "r"(cr3) );
  48 }
  49
  50 static inline unsigned long read_cr3()
  51 {
  52     unsigned long cr3;
  53
  54     asm volatile ( "mov %%cr3, %0" : "=r"(cr3) );
  55     return cr3;
  56 }
  57
  58 static inline void load_cr0(unsigned long cr0)
  59 {
  60     asm volatile ( "mov %0, %%cr0" : : "r"(cr0) );
  61 }
  62
  63 static inline unsigned long read_cr0()
  64 {
  65     unsigned long cr0;
  66
  67     asm volatile ( "mov %%cr0, %0" : "=r"(cr0) );
  68     return cr0;
  69 }
  70
  71
  72 static inline void load_cr4(unsigned long cr4)
  73 {
  74     asm volatile ( "mov %0, %%cr4" : : "r"(cr4) );
  75 }
  76
  77 static inline unsigned long read_cr4()
  78 {
  79     unsigned long cr4;
  80
  81     asm volatile ( "mov %%cr4, %0" : "=r"(cr4) );
  82     return cr4;
  83 }
  84
  85 #endif