mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 13:42:05 +07:00
2ef14f465b
Pull x86 mm changes from Peter Anvin:
"This is a huge set of several partly interrelated (and concurrently
developed) changes, which is why the branch history is messier than
one would like.
The *really* big items are two humonguous patchsets mostly developed
by Yinghai Lu at my request, which completely revamps the way we
create initial page tables. In particular, rather than estimating how
much memory we will need for page tables and then build them into that
memory -- a calculation that has shown to be incredibly fragile -- we
now build them (on 64 bits) with the aid of a "pseudo-linear mode" --
a #PF handler which creates temporary page tables on demand.
This has several advantages:
1. It makes it much easier to support things that need access to data
very early (a followon patchset uses this to load microcode way
early in the kernel startup).
2. It allows the kernel and all the kernel data objects to be invoked
from above the 4 GB limit. This allows kdump to work on very large
systems.
3. It greatly reduces the difference between Xen and native (Xen's
equivalent of the #PF handler are the temporary page tables created
by the domain builder), eliminating a bunch of fragile hooks.
The patch series also gets us a bit closer to W^X.
Additional work in this pull is the 64-bit get_user() work which you
were also involved with, and a bunch of cleanups/speedups to
__phys_addr()/__pa()."
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (105 commits)
x86, mm: Move reserving low memory later in initialization
x86, doc: Clarify the use of asm("%edx") in uaccess.h
x86, mm: Redesign get_user with a __builtin_choose_expr hack
x86: Be consistent with data size in getuser.S
x86, mm: Use a bitfield to mask nuisance get_user() warnings
x86/kvm: Fix compile warning in kvm_register_steal_time()
x86-32: Add support for 64bit get_user()
x86-32, mm: Remove reference to alloc_remap()
x86-32, mm: Remove reference to resume_map_numa_kva()
x86-32, mm: Rip out x86_32 NUMA remapping code
x86/numa: Use __pa_nodebug() instead
x86: Don't panic if can not alloc buffer for swiotlb
mm: Add alloc_bootmem_low_pages_nopanic()
x86, 64bit, mm: hibernate use generic mapping_init
x86, 64bit, mm: Mark data/bss/brk to nx
x86: Merge early kernel reserve for 32bit and 64bit
x86: Add Crash kernel low reservation
x86, kdump: Remove crashkernel range find limit for 64bit
memblock: Add memblock_mem_size()
x86, boot: Not need to check setup_header version for setup_data
...
823 lines
20 KiB
C
823 lines
20 KiB
C
#ifndef _ASM_X86_PGTABLE_H
|
|
#define _ASM_X86_PGTABLE_H
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/e820.h>
|
|
|
|
#include <asm/pgtable_types.h>
|
|
|
|
/*
|
|
* Macro to mark a page protection value as UC-
|
|
*/
|
|
#define pgprot_noncached(prot) \
|
|
((boot_cpu_data.x86 > 3) \
|
|
? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \
|
|
: (prot))
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/x86_init.h>
|
|
|
|
/*
|
|
* ZERO_PAGE is a global shared page that is always zero: used
|
|
* for zero-mapped memory areas etc..
|
|
*/
|
|
extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
|
|
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
|
|
|
|
extern spinlock_t pgd_lock;
|
|
extern struct list_head pgd_list;
|
|
|
|
extern struct mm_struct *pgd_page_get_mm(struct page *page);
|
|
|
|
#ifdef CONFIG_PARAVIRT
|
|
#include <asm/paravirt.h>
|
|
#else /* !CONFIG_PARAVIRT */
|
|
#define set_pte(ptep, pte) native_set_pte(ptep, pte)
|
|
#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
|
|
#define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd)
|
|
|
|
#define set_pte_atomic(ptep, pte) \
|
|
native_set_pte_atomic(ptep, pte)
|
|
|
|
#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
|
|
|
|
#ifndef __PAGETABLE_PUD_FOLDED
|
|
#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
|
|
#define pgd_clear(pgd) native_pgd_clear(pgd)
|
|
#endif
|
|
|
|
#ifndef set_pud
|
|
# define set_pud(pudp, pud) native_set_pud(pudp, pud)
|
|
#endif
|
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
#define pud_clear(pud) native_pud_clear(pud)
|
|
#endif
|
|
|
|
#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
|
|
#define pmd_clear(pmd) native_pmd_clear(pmd)
|
|
|
|
#define pte_update(mm, addr, ptep) do { } while (0)
|
|
#define pte_update_defer(mm, addr, ptep) do { } while (0)
|
|
#define pmd_update(mm, addr, ptep) do { } while (0)
|
|
#define pmd_update_defer(mm, addr, ptep) do { } while (0)
|
|
|
|
#define pgd_val(x) native_pgd_val(x)
|
|
#define __pgd(x) native_make_pgd(x)
|
|
|
|
#ifndef __PAGETABLE_PUD_FOLDED
|
|
#define pud_val(x) native_pud_val(x)
|
|
#define __pud(x) native_make_pud(x)
|
|
#endif
|
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
#define pmd_val(x) native_pmd_val(x)
|
|
#define __pmd(x) native_make_pmd(x)
|
|
#endif
|
|
|
|
#define pte_val(x) native_pte_val(x)
|
|
#define __pte(x) native_make_pte(x)
|
|
|
|
#define arch_end_context_switch(prev) do {} while(0)
|
|
|
|
#endif /* CONFIG_PARAVIRT */
|
|
|
|
/*
|
|
* The following only work if pte_present() is true.
|
|
* Undefined behaviour if not..
|
|
*/
|
|
static inline int pte_dirty(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_DIRTY;
|
|
}
|
|
|
|
static inline int pte_young(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_ACCESSED;
|
|
}
|
|
|
|
static inline int pmd_young(pmd_t pmd)
|
|
{
|
|
return pmd_flags(pmd) & _PAGE_ACCESSED;
|
|
}
|
|
|
|
static inline int pte_write(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_RW;
|
|
}
|
|
|
|
static inline int pte_file(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_FILE;
|
|
}
|
|
|
|
static inline int pte_huge(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_PSE;
|
|
}
|
|
|
|
static inline int pte_global(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_GLOBAL;
|
|
}
|
|
|
|
static inline int pte_exec(pte_t pte)
|
|
{
|
|
return !(pte_flags(pte) & _PAGE_NX);
|
|
}
|
|
|
|
static inline int pte_special(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_SPECIAL;
|
|
}
|
|
|
|
static inline unsigned long pte_pfn(pte_t pte)
|
|
{
|
|
return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT;
|
|
}
|
|
|
|
static inline unsigned long pmd_pfn(pmd_t pmd)
|
|
{
|
|
return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;
|
|
}
|
|
|
|
static inline unsigned long pud_pfn(pud_t pud)
|
|
{
|
|
return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT;
|
|
}
|
|
|
|
#define pte_page(pte) pfn_to_page(pte_pfn(pte))
|
|
|
|
static inline int pmd_large(pmd_t pte)
|
|
{
|
|
return pmd_flags(pte) & _PAGE_PSE;
|
|
}
|
|
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
static inline int pmd_trans_splitting(pmd_t pmd)
|
|
{
|
|
return pmd_val(pmd) & _PAGE_SPLITTING;
|
|
}
|
|
|
|
static inline int pmd_trans_huge(pmd_t pmd)
|
|
{
|
|
return pmd_val(pmd) & _PAGE_PSE;
|
|
}
|
|
|
|
static inline int has_transparent_hugepage(void)
|
|
{
|
|
return cpu_has_pse;
|
|
}
|
|
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
|
|
|
static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
|
|
{
|
|
pteval_t v = native_pte_val(pte);
|
|
|
|
return native_make_pte(v | set);
|
|
}
|
|
|
|
static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
|
|
{
|
|
pteval_t v = native_pte_val(pte);
|
|
|
|
return native_make_pte(v & ~clear);
|
|
}
|
|
|
|
static inline pte_t pte_mkclean(pte_t pte)
|
|
{
|
|
return pte_clear_flags(pte, _PAGE_DIRTY);
|
|
}
|
|
|
|
static inline pte_t pte_mkold(pte_t pte)
|
|
{
|
|
return pte_clear_flags(pte, _PAGE_ACCESSED);
|
|
}
|
|
|
|
static inline pte_t pte_wrprotect(pte_t pte)
|
|
{
|
|
return pte_clear_flags(pte, _PAGE_RW);
|
|
}
|
|
|
|
static inline pte_t pte_mkexec(pte_t pte)
|
|
{
|
|
return pte_clear_flags(pte, _PAGE_NX);
|
|
}
|
|
|
|
static inline pte_t pte_mkdirty(pte_t pte)
|
|
{
|
|
return pte_set_flags(pte, _PAGE_DIRTY);
|
|
}
|
|
|
|
static inline pte_t pte_mkyoung(pte_t pte)
|
|
{
|
|
return pte_set_flags(pte, _PAGE_ACCESSED);
|
|
}
|
|
|
|
static inline pte_t pte_mkwrite(pte_t pte)
|
|
{
|
|
return pte_set_flags(pte, _PAGE_RW);
|
|
}
|
|
|
|
static inline pte_t pte_mkhuge(pte_t pte)
|
|
{
|
|
return pte_set_flags(pte, _PAGE_PSE);
|
|
}
|
|
|
|
static inline pte_t pte_clrhuge(pte_t pte)
|
|
{
|
|
return pte_clear_flags(pte, _PAGE_PSE);
|
|
}
|
|
|
|
static inline pte_t pte_mkglobal(pte_t pte)
|
|
{
|
|
return pte_set_flags(pte, _PAGE_GLOBAL);
|
|
}
|
|
|
|
static inline pte_t pte_clrglobal(pte_t pte)
|
|
{
|
|
return pte_clear_flags(pte, _PAGE_GLOBAL);
|
|
}
|
|
|
|
static inline pte_t pte_mkspecial(pte_t pte)
|
|
{
|
|
return pte_set_flags(pte, _PAGE_SPECIAL);
|
|
}
|
|
|
|
static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
|
|
{
|
|
pmdval_t v = native_pmd_val(pmd);
|
|
|
|
return __pmd(v | set);
|
|
}
|
|
|
|
static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
|
|
{
|
|
pmdval_t v = native_pmd_val(pmd);
|
|
|
|
return __pmd(v & ~clear);
|
|
}
|
|
|
|
static inline pmd_t pmd_mkold(pmd_t pmd)
|
|
{
|
|
return pmd_clear_flags(pmd, _PAGE_ACCESSED);
|
|
}
|
|
|
|
static inline pmd_t pmd_wrprotect(pmd_t pmd)
|
|
{
|
|
return pmd_clear_flags(pmd, _PAGE_RW);
|
|
}
|
|
|
|
static inline pmd_t pmd_mkdirty(pmd_t pmd)
|
|
{
|
|
return pmd_set_flags(pmd, _PAGE_DIRTY);
|
|
}
|
|
|
|
static inline pmd_t pmd_mkhuge(pmd_t pmd)
|
|
{
|
|
return pmd_set_flags(pmd, _PAGE_PSE);
|
|
}
|
|
|
|
static inline pmd_t pmd_mkyoung(pmd_t pmd)
|
|
{
|
|
return pmd_set_flags(pmd, _PAGE_ACCESSED);
|
|
}
|
|
|
|
static inline pmd_t pmd_mkwrite(pmd_t pmd)
|
|
{
|
|
return pmd_set_flags(pmd, _PAGE_RW);
|
|
}
|
|
|
|
static inline pmd_t pmd_mknotpresent(pmd_t pmd)
|
|
{
|
|
return pmd_clear_flags(pmd, _PAGE_PRESENT);
|
|
}
|
|
|
|
/*
|
|
* Mask out unsupported bits in a present pgprot. Non-present pgprots
|
|
* can use those bits for other purposes, so leave them be.
|
|
*/
|
|
static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
|
|
{
|
|
pgprotval_t protval = pgprot_val(pgprot);
|
|
|
|
if (protval & _PAGE_PRESENT)
|
|
protval &= __supported_pte_mask;
|
|
|
|
return protval;
|
|
}
|
|
|
|
static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
|
|
{
|
|
return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |
|
|
massage_pgprot(pgprot));
|
|
}
|
|
|
|
static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
|
|
{
|
|
return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |
|
|
massage_pgprot(pgprot));
|
|
}
|
|
|
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
|
|
{
|
|
pteval_t val = pte_val(pte);
|
|
|
|
/*
|
|
* Chop off the NX bit (if present), and add the NX portion of
|
|
* the newprot (if present):
|
|
*/
|
|
val &= _PAGE_CHG_MASK;
|
|
val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;
|
|
|
|
return __pte(val);
|
|
}
|
|
|
|
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
|
|
{
|
|
pmdval_t val = pmd_val(pmd);
|
|
|
|
val &= _HPAGE_CHG_MASK;
|
|
val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK;
|
|
|
|
return __pmd(val);
|
|
}
|
|
|
|
/* mprotect needs to preserve PAT bits when updating vm_page_prot */
|
|
#define pgprot_modify pgprot_modify
|
|
static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
|
|
{
|
|
pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
|
|
pgprotval_t addbits = pgprot_val(newprot);
|
|
return __pgprot(preservebits | addbits);
|
|
}
|
|
|
|
#define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
|
|
|
|
#define canon_pgprot(p) __pgprot(massage_pgprot(p))
|
|
|
|
static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
|
|
unsigned long flags,
|
|
unsigned long new_flags)
|
|
{
|
|
/*
|
|
* PAT type is always WB for untracked ranges, so no need to check.
|
|
*/
|
|
if (x86_platform.is_untracked_pat_range(paddr, paddr + size))
|
|
return 1;
|
|
|
|
/*
|
|
* Certain new memtypes are not allowed with certain
|
|
* requested memtype:
|
|
* - request is uncached, return cannot be write-back
|
|
* - request is write-combine, return cannot be write-back
|
|
*/
|
|
if ((flags == _PAGE_CACHE_UC_MINUS &&
|
|
new_flags == _PAGE_CACHE_WB) ||
|
|
(flags == _PAGE_CACHE_WC &&
|
|
new_flags == _PAGE_CACHE_WB)) {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
pmd_t *populate_extra_pmd(unsigned long vaddr);
|
|
pte_t *populate_extra_pte(unsigned long vaddr);
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# include <asm/pgtable_32.h>
|
|
#else
|
|
# include <asm/pgtable_64.h>
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/mm_types.h>
|
|
#include <linux/log2.h>
|
|
|
|
static inline int pte_none(pte_t pte)
|
|
{
|
|
return !pte.pte;
|
|
}
|
|
|
|
#define __HAVE_ARCH_PTE_SAME
|
|
static inline int pte_same(pte_t a, pte_t b)
|
|
{
|
|
return a.pte == b.pte;
|
|
}
|
|
|
|
static inline int pte_present(pte_t a)
|
|
{
|
|
return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE |
|
|
_PAGE_NUMA);
|
|
}
|
|
|
|
#define pte_accessible pte_accessible
|
|
static inline int pte_accessible(pte_t a)
|
|
{
|
|
return pte_flags(a) & _PAGE_PRESENT;
|
|
}
|
|
|
|
static inline int pte_hidden(pte_t pte)
|
|
{
|
|
return pte_flags(pte) & _PAGE_HIDDEN;
|
|
}
|
|
|
|
static inline int pmd_present(pmd_t pmd)
|
|
{
|
|
/*
|
|
* Checking for _PAGE_PSE is needed too because
|
|
* split_huge_page will temporarily clear the present bit (but
|
|
* the _PAGE_PSE flag will remain set at all times while the
|
|
* _PAGE_PRESENT bit is clear).
|
|
*/
|
|
return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE |
|
|
_PAGE_NUMA);
|
|
}
|
|
|
|
static inline int pmd_none(pmd_t pmd)
|
|
{
|
|
/* Only check low word on 32-bit platforms, since it might be
|
|
out of sync with upper half. */
|
|
return (unsigned long)native_pmd_val(pmd) == 0;
|
|
}
|
|
|
|
static inline unsigned long pmd_page_vaddr(pmd_t pmd)
|
|
{
|
|
return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
|
|
}
|
|
|
|
/*
|
|
* Currently stuck as a macro due to indirect forward reference to
|
|
* linux/mmzone.h's __section_mem_map_addr() definition:
|
|
*/
|
|
#define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT)
|
|
|
|
/*
|
|
* the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
|
|
*
|
|
* this macro returns the index of the entry in the pmd page which would
|
|
* control the given virtual address
|
|
*/
|
|
static inline unsigned long pmd_index(unsigned long address)
|
|
{
|
|
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
|
|
}
|
|
|
|
/*
|
|
* Conversion functions: convert a page and protection to a page entry,
|
|
* and a page entry and page directory to the page they refer to.
|
|
*
|
|
* (Currently stuck as a macro because of indirect forward reference
|
|
* to linux/mm.h:page_to_nid())
|
|
*/
|
|
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
|
|
|
|
/*
|
|
* the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
|
|
*
|
|
* this function returns the index of the entry in the pte page which would
|
|
* control the given virtual address
|
|
*/
|
|
static inline unsigned long pte_index(unsigned long address)
|
|
{
|
|
return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
|
|
}
|
|
|
|
static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
|
|
{
|
|
return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
|
|
}
|
|
|
|
static inline int pmd_bad(pmd_t pmd)
|
|
{
|
|
#ifdef CONFIG_NUMA_BALANCING
|
|
/* pmd_numa check */
|
|
if ((pmd_flags(pmd) & (_PAGE_NUMA|_PAGE_PRESENT)) == _PAGE_NUMA)
|
|
return 0;
|
|
#endif
|
|
return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
|
|
}
|
|
|
|
static inline unsigned long pages_to_mb(unsigned long npg)
|
|
{
|
|
return npg >> (20 - PAGE_SHIFT);
|
|
}
|
|
|
|
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
|
|
remap_pfn_range(vma, vaddr, pfn, size, prot)
|
|
|
|
#if PAGETABLE_LEVELS > 2
|
|
static inline int pud_none(pud_t pud)
|
|
{
|
|
return native_pud_val(pud) == 0;
|
|
}
|
|
|
|
static inline int pud_present(pud_t pud)
|
|
{
|
|
return pud_flags(pud) & _PAGE_PRESENT;
|
|
}
|
|
|
|
static inline unsigned long pud_page_vaddr(pud_t pud)
|
|
{
|
|
return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);
|
|
}
|
|
|
|
/*
|
|
* Currently stuck as a macro due to indirect forward reference to
|
|
* linux/mmzone.h's __section_mem_map_addr() definition:
|
|
*/
|
|
#define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
|
|
|
|
/* Find an entry in the second-level page table.. */
|
|
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
|
|
{
|
|
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
|
|
}
|
|
|
|
static inline int pud_large(pud_t pud)
|
|
{
|
|
return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
|
|
(_PAGE_PSE | _PAGE_PRESENT);
|
|
}
|
|
|
|
static inline int pud_bad(pud_t pud)
|
|
{
|
|
return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
|
|
}
|
|
#else
|
|
static inline int pud_large(pud_t pud)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* PAGETABLE_LEVELS > 2 */
|
|
|
|
#if PAGETABLE_LEVELS > 3
|
|
static inline int pgd_present(pgd_t pgd)
|
|
{
|
|
return pgd_flags(pgd) & _PAGE_PRESENT;
|
|
}
|
|
|
|
static inline unsigned long pgd_page_vaddr(pgd_t pgd)
|
|
{
|
|
return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
|
|
}
|
|
|
|
/*
|
|
* Currently stuck as a macro due to indirect forward reference to
|
|
* linux/mmzone.h's __section_mem_map_addr() definition:
|
|
*/
|
|
#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
|
|
|
|
/* to find an entry in a page-table-directory. */
|
|
static inline unsigned long pud_index(unsigned long address)
|
|
{
|
|
return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
|
|
}
|
|
|
|
static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
|
|
{
|
|
return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
|
|
}
|
|
|
|
static inline int pgd_bad(pgd_t pgd)
|
|
{
|
|
return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
|
|
}
|
|
|
|
static inline int pgd_none(pgd_t pgd)
|
|
{
|
|
return !native_pgd_val(pgd);
|
|
}
|
|
#endif /* PAGETABLE_LEVELS > 3 */
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
/*
|
|
* the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
|
|
*
|
|
* this macro returns the index of the entry in the pgd page which would
|
|
* control the given virtual address
|
|
*/
|
|
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
|
|
|
|
/*
|
|
* pgd_offset() returns a (pgd_t *)
|
|
* pgd_index() is used get the offset into the pgd page's array of pgd_t's;
|
|
*/
|
|
#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
|
|
/*
|
|
* a shortcut which implies the use of the kernel's pgd, instead
|
|
* of a process's
|
|
*/
|
|
#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
|
|
|
|
|
|
#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
|
|
#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
extern int direct_gbpages;
|
|
void init_mem_mapping(void);
|
|
void early_alloc_pgt_buf(void);
|
|
|
|
/* local pte updates need not use xchg for locking */
|
|
static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
|
|
{
|
|
pte_t res = *ptep;
|
|
|
|
/* Pure native function needs no input for mm, addr */
|
|
native_pte_clear(NULL, 0, ptep);
|
|
return res;
|
|
}
|
|
|
|
static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
|
|
{
|
|
pmd_t res = *pmdp;
|
|
|
|
native_pmd_clear(pmdp);
|
|
return res;
|
|
}
|
|
|
|
static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep , pte_t pte)
|
|
{
|
|
native_set_pte(ptep, pte);
|
|
}
|
|
|
|
static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
|
|
pmd_t *pmdp , pmd_t pmd)
|
|
{
|
|
native_set_pmd(pmdp, pmd);
|
|
}
|
|
|
|
#ifndef CONFIG_PARAVIRT
|
|
/*
|
|
* Rules for using pte_update - it must be called after any PTE update which
|
|
* has not been done using the set_pte / clear_pte interfaces. It is used by
|
|
* shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
|
|
* updates should either be sets, clears, or set_pte_atomic for P->P
|
|
* transitions, which means this hook should only be called for user PTEs.
|
|
* This hook implies a P->P protection or access change has taken place, which
|
|
* requires a subsequent TLB flush. The notification can optionally be delayed
|
|
* until the TLB flush event by using the pte_update_defer form of the
|
|
* interface, but care must be taken to assure that the flush happens while
|
|
* still holding the same page table lock so that the shadow and primary pages
|
|
* do not become out of sync on SMP.
|
|
*/
|
|
#define pte_update(mm, addr, ptep) do { } while (0)
|
|
#define pte_update_defer(mm, addr, ptep) do { } while (0)
|
|
#endif
|
|
|
|
/*
|
|
* We only update the dirty/accessed state if we set
|
|
* the dirty bit by hand in the kernel, since the hardware
|
|
* will do the accessed bit for us, and we don't want to
|
|
* race with other CPU's that might be updating the dirty
|
|
* bit at the same time.
|
|
*/
|
|
struct vm_area_struct;
|
|
|
|
#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);
|
|
|
|
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
|
|
extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep);
|
|
|
|
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
|
|
extern int ptep_clear_flush_young(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t *ptep);
|
|
|
|
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
|
|
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep)
|
|
{
|
|
pte_t pte = native_ptep_get_and_clear(ptep);
|
|
pte_update(mm, addr, ptep);
|
|
return pte;
|
|
}
|
|
|
|
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
|
|
static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep,
|
|
int full)
|
|
{
|
|
pte_t pte;
|
|
if (full) {
|
|
/*
|
|
* Full address destruction in progress; paravirt does not
|
|
* care about updates and native needs no locking
|
|
*/
|
|
pte = native_local_ptep_get_and_clear(ptep);
|
|
} else {
|
|
pte = ptep_get_and_clear(mm, addr, ptep);
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
|
|
static inline void ptep_set_wrprotect(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
|
|
pte_update(mm, addr, ptep);
|
|
}
|
|
|
|
#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
|
|
|
|
#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
|
|
|
|
#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
|
|
extern int pmdp_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long address, pmd_t *pmdp,
|
|
pmd_t entry, int dirty);
|
|
|
|
#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
|
|
extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
|
|
unsigned long addr, pmd_t *pmdp);
|
|
|
|
#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
|
|
extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
|
|
unsigned long address, pmd_t *pmdp);
|
|
|
|
|
|
#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
|
|
extern void pmdp_splitting_flush(struct vm_area_struct *vma,
|
|
unsigned long addr, pmd_t *pmdp);
|
|
|
|
#define __HAVE_ARCH_PMD_WRITE
|
|
static inline int pmd_write(pmd_t pmd)
|
|
{
|
|
return pmd_flags(pmd) & _PAGE_RW;
|
|
}
|
|
|
|
#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
|
|
static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
|
|
pmd_t *pmdp)
|
|
{
|
|
pmd_t pmd = native_pmdp_get_and_clear(pmdp);
|
|
pmd_update(mm, addr, pmdp);
|
|
return pmd;
|
|
}
|
|
|
|
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
|
|
static inline void pmdp_set_wrprotect(struct mm_struct *mm,
|
|
unsigned long addr, pmd_t *pmdp)
|
|
{
|
|
clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
|
|
pmd_update(mm, addr, pmdp);
|
|
}
|
|
|
|
/*
|
|
* clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
|
|
*
|
|
* dst - pointer to pgd range anwhere on a pgd page
|
|
* src - ""
|
|
* count - the number of pgds to copy.
|
|
*
|
|
* dst and src can be on the same page, but the range must not overlap,
|
|
* and must not cross a page boundary.
|
|
*/
|
|
static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
|
|
{
|
|
memcpy(dst, src, count * sizeof(pgd_t));
|
|
}
|
|
|
|
#define PTE_SHIFT ilog2(PTRS_PER_PTE)
|
|
static inline int page_level_shift(enum pg_level level)
|
|
{
|
|
return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;
|
|
}
|
|
static inline unsigned long page_level_size(enum pg_level level)
|
|
{
|
|
return 1UL << page_level_shift(level);
|
|
}
|
|
static inline unsigned long page_level_mask(enum pg_level level)
|
|
{
|
|
return ~(page_level_size(level) - 1);
|
|
}
|
|
|
|
/*
|
|
* The x86 doesn't have any external MMU info: the kernel page
|
|
* tables contain all the necessary information.
|
|
*/
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
}
|
|
static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
|
|
unsigned long addr, pmd_t *pmd)
|
|
{
|
|
}
|
|
|
|
#include <asm-generic/pgtable.h>
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_PGTABLE_H */
|