387e220a2e
Compiling out hash support code when CONFIG_PPC_64S_HASH_MMU=n saves
128kB kernel image size (90kB text) on powernv_defconfig minus KVM,
350kB on pseries_defconfig minus KVM, 40kB on a tiny config.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Fixup defined(ARCH_HAS_MEMREMAP_COMPAT_ALIGN), which needs CONFIG.
Fix radix_enabled() use in setup_initial_memory_limit(). Add some
stubs to reduce number of ifdefs.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-18-npiggin@gmail.com
44 lines
1.5 KiB
C
44 lines
1.5 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
|
|
|
|
#if defined(CONFIG_PPC32) || defined(CONFIG_PPC_64S_HASH_MMU)
|
|
/*
|
|
* 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.
|
|
*/
|
|
void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep);
|
|
#else
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) {}
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif
|