35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdint.h>
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namespace cuttlefish {
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// Keep the full disk size a multiple of 64k, for crosvm's virtio_blk driver
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constexpr int DISK_SIZE_SHIFT = 16;
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// Keep all partitions 4k aligned, for host performance reasons
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constexpr int PARTITION_SIZE_SHIFT = 12;
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// Returns the smallest multiple of 2^align_log greater than or equal to val.
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constexpr uint64_t AlignToPowerOf2(uint64_t val, uint8_t align_log) {
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uint64_t align = 1ULL << align_log;
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return ((val + (align - 1)) / align) * align;
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}
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} // namespace cuttlefish
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