user/test/x86/hypercall.c

   1 #include "printf.h"
   2
   3 #define KVM_HYPERCALL ".byte 0x0f,0x01,0xc1"
   4
   5 static inline long kvm_hypercall0(unsigned int nr)
   6 {
   7         long ret;
   8         asm volatile(KVM_HYPERCALL
   9                      : "=a"(ret)
  10                      : "a"(nr));
  11         return ret;
  12 }
  13
  14 int main(int ac, char **av)
  15 {
  16         kvm_hypercall0(-1u);
  17         printf("Hypercall: OK\n");
  18         return 0;
  19 }