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Diffstat (limited to 'hw/hyperv/hv-balloon-internal.h')
| -rw-r--r-- | hw/hyperv/hv-balloon-internal.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/hw/hyperv/hv-balloon-internal.h b/hw/hyperv/hv-balloon-internal.h new file mode 100644 index 0000000000..164c2e5825 --- /dev/null +++ b/hw/hyperv/hv-balloon-internal.h @@ -0,0 +1,33 @@ +/* + * 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 + +#include "qemu/osdep.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 |