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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frame_vector.h (1447B)

      1// SPDX-License-Identifier: GPL-2.0
      2#ifndef _MEDIA_FRAME_VECTOR_H
      3#define _MEDIA_FRAME_VECTOR_H
      4
      5/* Container for pinned pfns / pages in frame_vector.c */
      6struct frame_vector {
      7	unsigned int nr_allocated;	/* Number of frames we have space for */
      8	unsigned int nr_frames;	/* Number of frames stored in ptrs array */
      9	bool got_ref;		/* Did we pin pages by getting page ref? */
     10	bool is_pfns;		/* Does array contain pages or pfns? */
     11	void *ptrs[];		/* Array of pinned pfns / pages. Use
     12				 * pfns_vector_pages() or pfns_vector_pfns()
     13				 * for access */
     14};
     15
     16struct frame_vector *frame_vector_create(unsigned int nr_frames);
     17void frame_vector_destroy(struct frame_vector *vec);
     18int get_vaddr_frames(unsigned long start, unsigned int nr_pfns,
     19		     struct frame_vector *vec);
     20void put_vaddr_frames(struct frame_vector *vec);
     21int frame_vector_to_pages(struct frame_vector *vec);
     22void frame_vector_to_pfns(struct frame_vector *vec);
     23
     24static inline unsigned int frame_vector_count(struct frame_vector *vec)
     25{
     26	return vec->nr_frames;
     27}
     28
     29static inline struct page **frame_vector_pages(struct frame_vector *vec)
     30{
     31	if (vec->is_pfns) {
     32		int err = frame_vector_to_pages(vec);
     33
     34		if (err)
     35			return ERR_PTR(err);
     36	}
     37	return (struct page **)(vec->ptrs);
     38}
     39
     40static inline unsigned long *frame_vector_pfns(struct frame_vector *vec)
     41{
     42	if (!vec->is_pfns)
     43		frame_vector_to_pfns(vec);
     44	return (unsigned long *)(vec->ptrs);
     45}
     46
     47#endif /* _MEDIA_FRAME_VECTOR_H */