arch/mips/include/asm/kvm_para.h

   1 #ifndef _ASM_MIPS_KVM_PARA_H
   2 #define _ASM_MIPS_KVM_PARA_H
   3
   4 #include <uapi/asm/kvm_para.h>
   5
   6 #define KVM_HYPERCALL ".word 0x42000028"
   7
   8 /*
   9  * Hypercalls for KVM.
  10  *
  11  * Hypercall number is passed in v0.
  12  * Return value will be placed in v0.
  13  * Up to 3 arguments are passed in a0, a1, and a2.
  14  */
  15 static inline unsigned long kvm_hypercall0(unsigned long num)
  16 {
  17         register unsigned long n asm("v0");
  18         register unsigned long r asm("v0");
  19
  20         n = num;
  21         __asm__ __volatile__(
  22                 KVM_HYPERCALL
  23                 : "=r" (r) : "r" (n) : "memory"
  24                 );
  25
  26         return r;
  27 }
  28
  29 static inline unsigned long kvm_hypercall1(unsigned long num,
  30                                         unsigned long arg0)
  31 {
  32         register unsigned long n asm("v0");
  33         register unsigned long r asm("v0");
  34         register unsigned long a0 asm("a0");
  35
  36         n = num;
  37         a0 = arg0;
  38         __asm__ __volatile__(
  39                 KVM_HYPERCALL
  40                 : "=r" (r) : "r" (n), "r" (a0) : "memory"
  41                 );
  42
  43         return r;
  44 }
  45
  46 static inline unsigned long kvm_hypercall2(unsigned long num,
  47                                         unsigned long arg0, unsigned long arg1)
  48 {
  49         register unsigned long n asm("v0");
  50         register unsigned long r asm("v0");
  51         register unsigned long a0 asm("a0");
  52         register unsigned long a1 asm("a1");
  53
  54         n = num;
  55         a0 = arg0;
  56         a1 = arg1;
  57         __asm__ __volatile__(
  58                 KVM_HYPERCALL
  59                 : "=r" (r) : "r" (n), "r" (a0), "r" (a1) : "memory"
  60                 );
  61
  62         return r;
  63 }
  64
  65 static inline unsigned long kvm_hypercall3(unsigned long num,
  66         unsigned long arg0, unsigned long arg1, unsigned long arg2)
  67 {
  68         register unsigned long n asm("v0");
  69         register unsigned long r asm("v0");
  70         register unsigned long a0 asm("a0");
  71         register unsigned long a1 asm("a1");
  72         register unsigned long a2 asm("a2");
  73
  74         n = num;
  75         a0 = arg0;
  76         a1 = arg1;
  77         a2 = arg2;
  78         __asm__ __volatile__(
  79                 KVM_HYPERCALL
  80                 : "=r" (r) : "r" (n), "r" (a0), "r" (a1), "r" (a2) : "memory"
  81                 );
  82
  83         return r;
  84 }
  85
  86 static inline bool kvm_check_and_clear_guest_paused(void)
  87 {
  88         return false;
  89 }
  90
  91 static inline unsigned int kvm_arch_para_features(void)
  92 {
  93         return 0;
  94 }
  95
  96 #ifdef CONFIG_MIPS_PARAVIRT
  97 static inline bool kvm_para_available(void)
  98 {
  99         return true;
 100 }
 101 #else
 102 static inline bool kvm_para_available(void)
 103 {
 104         return false;
 105 }
 106 #endif
 107
 108
 109 #endif /* _ASM_MIPS_KVM_PARA_H */