+#define __HYPERCALL "call hypercall_page+%c[offset]"
+#define __HYPERCALL_ENTRY(x) \
+ [offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))
+
+#ifdef CONFIG_X86_32
+#define __HYPERCALL_RETREG "eax"
+#define __HYPERCALL_ARG1REG "ebx"
+#define __HYPERCALL_ARG2REG "ecx"
+#define __HYPERCALL_ARG3REG "edx"
+#define __HYPERCALL_ARG4REG "esi"
+#define __HYPERCALL_ARG5REG "edi"
+#else
+#define __HYPERCALL_RETREG "rax"
+#define __HYPERCALL_ARG1REG "rdi"
+#define __HYPERCALL_ARG2REG "rsi"
+#define __HYPERCALL_ARG3REG "rdx"
+#define __HYPERCALL_ARG4REG "r10"
+#define __HYPERCALL_ARG5REG "r8"
+#endif
+
+#define __HYPERCALL_DECLS \
+ register unsigned long __res asm(__HYPERCALL_RETREG); \
+ register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
+ register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
+ register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
+ register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
+ register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5;
+
+#define __HYPERCALL_0PARAM "=r" (__res)
+#define __HYPERCALL_1PARAM __HYPERCALL_0PARAM, "+r" (__arg1)
+#define __HYPERCALL_2PARAM __HYPERCALL_1PARAM, "+r" (__arg2)
+#define __HYPERCALL_3PARAM __HYPERCALL_2PARAM, "+r" (__arg3)
+#define __HYPERCALL_4PARAM __HYPERCALL_3PARAM, "+r" (__arg4)
+#define __HYPERCALL_5PARAM __HYPERCALL_4PARAM, "+r" (__arg5)
+
+#define __HYPERCALL_0ARG()
+#define __HYPERCALL_1ARG(a1) \
+ __HYPERCALL_0ARG() __arg1 = (unsigned long)(a1);
+#define __HYPERCALL_2ARG(a1,a2) \
+ __HYPERCALL_1ARG(a1) __arg2 = (unsigned long)(a2);
+#define __HYPERCALL_3ARG(a1,a2,a3) \
+ __HYPERCALL_2ARG(a1,a2) __arg3 = (unsigned long)(a3);
+#define __HYPERCALL_4ARG(a1,a2,a3,a4) \
+ __HYPERCALL_3ARG(a1,a2,a3) __arg4 = (unsigned long)(a4);
+#define __HYPERCALL_5ARG(a1,a2,a3,a4,a5) \
+ __HYPERCALL_4ARG(a1,a2,a3,a4) __arg5 = (unsigned long)(a5);
+
+#define __HYPERCALL_CLOBBER5 "memory"
+#define __HYPERCALL_CLOBBER4 __HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
+#define __HYPERCALL_CLOBBER3 __HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
+#define __HYPERCALL_CLOBBER2 __HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
+#define __HYPERCALL_CLOBBER1 __HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
+#define __HYPERCALL_CLOBBER0 __HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG
+