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Diffstat (limited to 'mm/shuffle.h')
| -rw-r--r-- | mm/shuffle.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/mm/shuffle.h b/mm/shuffle.h new file mode 100644 index 000000000000..644c8ee97b9e --- /dev/null +++ b/mm/shuffle.h @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright(c) 2018 Intel Corporation. All rights reserved. +#ifndef _MM_SHUFFLE_H +#define _MM_SHUFFLE_H +#include <linux/jump_label.h> + +/* + * SHUFFLE_ENABLE is called from the command line enabling path, or by + * platform-firmware enabling that indicates the presence of a + * direct-mapped memory-side-cache. SHUFFLE_FORCE_DISABLE is called from + * the command line path and overrides any previous or future + * SHUFFLE_ENABLE. + */ +enum mm_shuffle_ctl { + SHUFFLE_ENABLE, + SHUFFLE_FORCE_DISABLE, +}; + +#define SHUFFLE_ORDER (MAX_ORDER-1) + +#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR +DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key); +extern void page_alloc_shuffle(enum mm_shuffle_ctl ctl); +extern void __shuffle_free_memory(pg_data_t *pgdat); +static inline void shuffle_free_memory(pg_data_t *pgdat) +{ + if (!static_branch_unlikely(&page_alloc_shuffle_key)) + return; + __shuffle_free_memory(pgdat); +} + +extern void __shuffle_zone(struct zone *z); +static inline void shuffle_zone(struct zone *z) +{ + if (!static_branch_unlikely(&page_alloc_shuffle_key)) + return; + __shuffle_zone(z); +} +#else +static inline void shuffle_free_memory(pg_data_t *pgdat) +{ +} + +static inline void shuffle_zone(struct zone *z) +{ +} + +static inline void page_alloc_shuffle(enum mm_shuffle_ctl ctl) +{ +} +#endif +#endif /* _MM_SHUFFLE_H */ |