10 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
19 * @v hv Hyper-V hypervisor
21 * @v in Input parameters
22 * @v out Output parameters
23 * @ret status Status code
25 static inline __attribute__ (( always_inline )) int
26 hv_call ( struct hv_hypervisor *hv, unsigned int code, const void *in,
28 void *hypercall = hv->hypercall;
35 in_phys = ( ( __builtin_constant_p ( in ) && ( in == NULL ) )
36 ? 0 : virt_to_phys ( in ) );
37 out_phys = ( ( __builtin_constant_p ( out ) && ( out == NULL ) )
38 ? 0 : virt_to_phys ( out ) );
39 __asm__ __volatile__ ( "call *%9"
40 : "=a" ( result ), "=c" ( discard_ecx ),
42 : "d" ( 0 ), "a" ( code ),
43 "b" ( 0 ), "c" ( in_phys ),
44 "D" ( 0 ), "S" ( out_phys ),
55 static inline __attribute__ (( always_inline )) void
56 hv_set_bit ( void *bits, unsigned int bit ) {
58 uint32_t dword[ ( bit / 32 ) + 1 ];
61 /* Set bit using "lock bts". Inform compiler that any memory
62 * from the start of the bit field up to and including the
63 * dword containing this bit may be modified. (This is
64 * overkill but shouldn't matter in practice since we're
65 * unlikely to subsequently read other bits from the same bit
68 __asm__ __volatile__ ( "lock bts %1, %0"
69 : "+m" ( *dwords ) : "Ir" ( bit ) );
72 #endif /* _BITS_HYPERV_H */