cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cma.h (2059B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __CMA_H__
      3#define __CMA_H__
      4
      5#include <linux/init.h>
      6#include <linux/types.h>
      7#include <linux/numa.h>
      8
      9/*
     10 * There is always at least global CMA area and a few optional
     11 * areas configured in kernel .config.
     12 */
     13#ifdef CONFIG_CMA_AREAS
     14#define MAX_CMA_AREAS	(1 + CONFIG_CMA_AREAS)
     15#endif
     16
     17#define CMA_MAX_NAME 64
     18
     19/*
     20 *  the buddy -- especially pageblock merging and alloc_contig_range()
     21 * -- can deal with only some pageblocks of a higher-order page being
     22 *  MIGRATE_CMA, we can use pageblock_nr_pages.
     23 */
     24#define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages
     25#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES)
     26
     27struct cma;
     28
     29extern unsigned long totalcma_pages;
     30extern phys_addr_t cma_get_base(const struct cma *cma);
     31extern unsigned long cma_get_size(const struct cma *cma);
     32extern const char *cma_get_name(const struct cma *cma);
     33
     34extern int __init cma_declare_contiguous_nid(phys_addr_t base,
     35			phys_addr_t size, phys_addr_t limit,
     36			phys_addr_t alignment, unsigned int order_per_bit,
     37			bool fixed, const char *name, struct cma **res_cma,
     38			int nid);
     39static inline int __init cma_declare_contiguous(phys_addr_t base,
     40			phys_addr_t size, phys_addr_t limit,
     41			phys_addr_t alignment, unsigned int order_per_bit,
     42			bool fixed, const char *name, struct cma **res_cma)
     43{
     44	return cma_declare_contiguous_nid(base, size, limit, alignment,
     45			order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
     46}
     47extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
     48					unsigned int order_per_bit,
     49					const char *name,
     50					struct cma **res_cma);
     51extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align,
     52			      bool no_warn);
     53extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned long count);
     54extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count);
     55
     56extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
     57
     58extern void cma_reserve_pages_on_error(struct cma *cma);
     59#endif