73ea68ad0d
update_mmu_cache() voids when hash page tables are not used. On PPC32 that means when MMU_FTR_HPTE_TABLE is not defined. On PPC64 that means when RADIX is enabled. Rename core part of update_mmu_cache() as __update_mmu_cache() and include the initial verification in an inlined caller. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/bea5ad0de7f83eff256116816d46c84fa0a444de.1662370698.git.christophe.leroy@csgroup.eu
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_BOOK3S_PGTABLE_H
|
|
#define _ASM_POWERPC_BOOK3S_PGTABLE_H
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#include <asm/book3s/64/pgtable.h>
|
|
#else
|
|
#include <asm/book3s/32/pgtable.h>
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/* Insert a PTE, top-level function is out of line. It uses an inline
|
|
* low level function in the respective pgtable-* files
|
|
*/
|
|
extern void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
|
|
pte_t pte);
|
|
|
|
|
|
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
|
|
extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address,
|
|
pte_t *ptep, pte_t entry, int dirty);
|
|
|
|
struct file;
|
|
extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
|
|
unsigned long size, pgprot_t vma_prot);
|
|
#define __HAVE_PHYS_MEM_ACCESS_PROT
|
|
|
|
void __update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep);
|
|
|
|
/*
|
|
* This gets called at the end of handling a page fault, when
|
|
* the kernel has put a new PTE into the page table for the process.
|
|
* We use it to ensure coherency between the i-cache and d-cache
|
|
* for the page which has just been mapped in.
|
|
* On machines which use an MMU hash table, we use this to put a
|
|
* corresponding HPTE into the hash table ahead of time, instead of
|
|
* waiting for the inevitable extra hash-table miss exception.
|
|
*/
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep)
|
|
{
|
|
if (IS_ENABLED(CONFIG_PPC32) && !mmu_has_feature(MMU_FTR_HPTE_TABLE))
|
|
return;
|
|
if (radix_enabled())
|
|
return;
|
|
__update_mmu_cache(vma, address, ptep);
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif
|