blob: ee53a28a26679b5b3384fb6370c59ff69288b292 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/*
* QEMU Hyper-V Dynamic Memory Protocol driver
*
* Copyright (C) 2020-2023 Oracle and/or its affiliates.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_HYPERV_HV_BALLOON_INTERNAL_H
#define HW_HYPERV_HV_BALLOON_INTERNAL_H
#define HV_BALLOON_PFN_SHIFT 12
#define HV_BALLOON_PAGE_SIZE (1 << HV_BALLOON_PFN_SHIFT)
#define SUM_OVERFLOW_U64(in1, in2) ((in1) > UINT64_MAX - (in2))
#define SUM_SATURATE_U64(in1, in2) \
({ \
uint64_t _in1 = (in1), _in2 = (in2); \
uint64_t _result; \
\
if (!SUM_OVERFLOW_U64(_in1, _in2)) { \
_result = _in1 + _in2; \
} else { \
_result = UINT64_MAX; \
} \
\
_result; \
})
#endif
|
