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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pgalloc.h (1809B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_POWERPC_NOHASH_PGALLOC_H
      3#define _ASM_POWERPC_NOHASH_PGALLOC_H
      4
      5#include <linux/mm.h>
      6#include <linux/slab.h>
      7
      8extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
      9#ifdef CONFIG_PPC64
     10extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
     11#else
     12/* 44x etc which is BOOKE not BOOK3E */
     13static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
     14				     unsigned long address)
     15{
     16
     17}
     18#endif /* !CONFIG_PPC_BOOK3E */
     19
     20static inline pgd_t *pgd_alloc(struct mm_struct *mm)
     21{
     22	return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
     23			pgtable_gfp_flags(mm, GFP_KERNEL));
     24}
     25
     26static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
     27{
     28	kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
     29}
     30
     31#ifdef CONFIG_PPC64
     32#include <asm/nohash/64/pgalloc.h>
     33#else
     34#include <asm/nohash/32/pgalloc.h>
     35#endif
     36
     37static inline void pgtable_free(void *table, int shift)
     38{
     39	if (!shift) {
     40		pte_fragment_free((unsigned long *)table, 0);
     41	} else {
     42		BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
     43		kmem_cache_free(PGT_CACHE(shift), table);
     44	}
     45}
     46
     47#define get_hugepd_cache_index(x)	(x)
     48
     49static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
     50{
     51	unsigned long pgf = (unsigned long)table;
     52
     53	BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
     54	pgf |= shift;
     55	tlb_remove_table(tlb, (void *)pgf);
     56}
     57
     58static inline void __tlb_remove_table(void *_table)
     59{
     60	void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
     61	unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
     62
     63	pgtable_free(table, shift);
     64}
     65
     66static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
     67				  unsigned long address)
     68{
     69	tlb_flush_pgtable(tlb, address);
     70	pgtable_free_tlb(tlb, table, 0);
     71}
     72#endif /* _ASM_POWERPC_NOHASH_PGALLOC_H */