71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright(c) 2018 Intel Corporation. All rights reserved.
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#ifndef _MM_SHUFFLE_H
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#define _MM_SHUFFLE_H
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#include <linux/jump_label.h>
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/*
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* SHUFFLE_ENABLE is called from the command line enabling path, or by
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* platform-firmware enabling that indicates the presence of a
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* direct-mapped memory-side-cache. SHUFFLE_FORCE_DISABLE is called from
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* the command line path and overrides any previous or future
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* SHUFFLE_ENABLE.
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*/
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enum mm_shuffle_ctl {
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SHUFFLE_ENABLE,
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SHUFFLE_FORCE_DISABLE,
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};
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#define SHUFFLE_ORDER (MAX_ORDER-1)
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#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR
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DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key);
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extern void page_alloc_shuffle(enum mm_shuffle_ctl ctl);
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extern void __shuffle_free_memory(pg_data_t *pgdat);
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extern bool shuffle_pick_tail(void);
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static inline void shuffle_free_memory(pg_data_t *pgdat)
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{
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if (!static_branch_unlikely(&page_alloc_shuffle_key))
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return;
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__shuffle_free_memory(pgdat);
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}
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extern void __shuffle_zone(struct zone *z);
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static inline void shuffle_zone(struct zone *z)
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{
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if (!static_branch_unlikely(&page_alloc_shuffle_key))
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return;
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__shuffle_zone(z);
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}
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static inline bool is_shuffle_order(int order)
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{
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if (!static_branch_unlikely(&page_alloc_shuffle_key))
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return false;
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return order >= SHUFFLE_ORDER;
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}
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#else
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static inline bool shuffle_pick_tail(void)
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{
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return false;
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}
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static inline void shuffle_free_memory(pg_data_t *pgdat)
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{
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}
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static inline void shuffle_zone(struct zone *z)
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{
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}
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static inline void page_alloc_shuffle(enum mm_shuffle_ctl ctl)
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{
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}
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static inline bool is_shuffle_order(int order)
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{
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return false;
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}
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#endif
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#endif /* _MM_SHUFFLE_H */
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