1// SPDX-License-Identifier: GPL-2.0 2// Copyright(c) 2018 Intel Corporation. All rights reserved. 3#ifndef _MM_SHUFFLE_H 4#define _MM_SHUFFLE_H 5#include <linux/jump_label.h> 6 7/* 8 * SHUFFLE_ENABLE is called from the command line enabling path, or by 9 * platform-firmware enabling that indicates the presence of a 10 * direct-mapped memory-side-cache. SHUFFLE_FORCE_DISABLE is called from 11 * the command line path and overrides any previous or future 12 * SHUFFLE_ENABLE. 13 */ 14enum mm_shuffle_ctl { 15 SHUFFLE_ENABLE, 16 SHUFFLE_FORCE_DISABLE, 17}; 18 19#define SHUFFLE_ORDER (MAX_ORDER-1) 20 21#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR 22DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key); 23extern void page_alloc_shuffle(enum mm_shuffle_ctl ctl); 24extern void __shuffle_free_memory(pg_data_t *pgdat); 25static inline void shuffle_free_memory(pg_data_t *pgdat) 26{ 27 if (!static_branch_unlikely(&page_alloc_shuffle_key)) 28 return; 29 __shuffle_free_memory(pgdat); 30} 31 32extern void __shuffle_zone(struct zone *z); 33static inline void shuffle_zone(struct zone *z) 34{ 35 if (!static_branch_unlikely(&page_alloc_shuffle_key)) 36 return; 37 __shuffle_zone(z); 38} 39 40static inline bool is_shuffle_order(int order) 41{ 42 if (!static_branch_unlikely(&page_alloc_shuffle_key)) 43 return false; 44 return order >= SHUFFLE_ORDER; 45} 46#else 47static inline void shuffle_free_memory(pg_data_t *pgdat) 48{ 49} 50 51static inline void shuffle_zone(struct zone *z) 52{ 53} 54 55static inline void page_alloc_shuffle(enum mm_shuffle_ctl ctl) 56{ 57} 58 59static inline bool is_shuffle_order(int order) 60{ 61 return false; 62} 63#endif 64#endif /* _MM_SHUFFLE_H */ 65