94171b19c3
Add newer helpers to make the function usage simpler. It is always recommended to use find_current_mm_pte() for walking the page table. If we cannot use find_current_mm_pte(), it should be documented why the said usage of __find_linux_pte() is safe against a parallel THP split. For now we have KVM code using __find_linux_pte(). This is because kvm code ends up calling __find_linux_pte() in real mode with MSR_EE=0 but with PACA soft_enabled = 1. We may want to fix that later and make sure we keep the MSR_EE and PACA soft_enabled in sync. When we do that we can switch kvm to use find_linux_pte(). Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
#ifndef _ASM_POWERPC_PGTABLE_H
|
|
#define _ASM_POWERPC_PGTABLE_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/mmdebug.h>
|
|
#include <linux/mmzone.h>
|
|
#include <asm/processor.h> /* For TASK_SIZE */
|
|
#include <asm/mmu.h>
|
|
#include <asm/page.h>
|
|
|
|
struct mm_struct;
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S
|
|
#include <asm/book3s/pgtable.h>
|
|
#else
|
|
#include <asm/nohash/pgtable.h>
|
|
#endif /* !CONFIG_PPC_BOOK3S */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/tlbflush.h>
|
|
|
|
/* Keep these as a macros to avoid include dependency mess */
|
|
#define pte_page(x) pfn_to_page(pte_pfn(x))
|
|
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
|
|
|
|
/*
|
|
* ZERO_PAGE is a global shared page that is always zero: used
|
|
* for zero-mapped memory areas etc..
|
|
*/
|
|
extern unsigned long empty_zero_page[];
|
|
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
|
|
|
|
extern pgd_t swapper_pg_dir[];
|
|
|
|
void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn);
|
|
int dma_pfn_limit_to_zone(u64 pfn_limit);
|
|
extern void paging_init(void);
|
|
|
|
/*
|
|
* kern_addr_valid is intended to indicate whether an address is a valid
|
|
* kernel address. Most 32-bit archs define it as always true (like this)
|
|
* but most 64-bit archs actually perform a test. What should we do here?
|
|
*/
|
|
#define kern_addr_valid(addr) (1)
|
|
|
|
#include <asm-generic/pgtable.h>
|
|
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
|
|
|
|
extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
|
|
unsigned long end, int write,
|
|
struct page **pages, int *nr);
|
|
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
|
|
#define pmd_large(pmd) 0
|
|
#endif
|
|
|
|
/* can we use this in kvm */
|
|
unsigned long vmalloc_to_phys(void *vmalloc_addr);
|
|
|
|
void pgtable_cache_add(unsigned shift, void (*ctor)(void *));
|
|
void pgtable_cache_init(void);
|
|
|
|
#ifdef CONFIG_STRICT_KERNEL_RWX
|
|
void mark_initmem_nx(void);
|
|
#else
|
|
static inline void mark_initmem_nx(void) { }
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_POWERPC_PGTABLE_H */
|