cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

pgalloc-track.h (1298B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _LINUX_PGALLOC_TRACK_H
      3#define _LINUX_PGALLOC_TRACK_H
      4
      5#if defined(CONFIG_MMU)
      6static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd,
      7				     unsigned long address,
      8				     pgtbl_mod_mask *mod_mask)
      9{
     10	if (unlikely(pgd_none(*pgd))) {
     11		if (__p4d_alloc(mm, pgd, address))
     12			return NULL;
     13		*mod_mask |= PGTBL_PGD_MODIFIED;
     14	}
     15
     16	return p4d_offset(pgd, address);
     17}
     18
     19static inline pud_t *pud_alloc_track(struct mm_struct *mm, p4d_t *p4d,
     20				     unsigned long address,
     21				     pgtbl_mod_mask *mod_mask)
     22{
     23	if (unlikely(p4d_none(*p4d))) {
     24		if (__pud_alloc(mm, p4d, address))
     25			return NULL;
     26		*mod_mask |= PGTBL_P4D_MODIFIED;
     27	}
     28
     29	return pud_offset(p4d, address);
     30}
     31
     32static inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud,
     33				     unsigned long address,
     34				     pgtbl_mod_mask *mod_mask)
     35{
     36	if (unlikely(pud_none(*pud))) {
     37		if (__pmd_alloc(mm, pud, address))
     38			return NULL;
     39		*mod_mask |= PGTBL_PUD_MODIFIED;
     40	}
     41
     42	return pmd_offset(pud, address);
     43}
     44#endif /* CONFIG_MMU */
     45
     46#define pte_alloc_kernel_track(pmd, address, mask)			\
     47	((unlikely(pmd_none(*(pmd))) &&					\
     48	  (__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\
     49		NULL: pte_offset_kernel(pmd, address))
     50
     51#endif /* _LINUX_PGALLOC_TRACK_H */