d8d89827fc
&ptep->pte isn't always an unsigned long *, so cast it to avoid a warning. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
289 lines
10 KiB
C
289 lines
10 KiB
C
#ifndef _ASM_X86_PGTABLE_H
|
|
#define _ASM_X86_PGTABLE_H
|
|
|
|
#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
|
|
#define FIRST_USER_ADDRESS 0
|
|
|
|
#define _PAGE_BIT_PRESENT 0
|
|
#define _PAGE_BIT_RW 1
|
|
#define _PAGE_BIT_USER 2
|
|
#define _PAGE_BIT_PWT 3
|
|
#define _PAGE_BIT_PCD 4
|
|
#define _PAGE_BIT_ACCESSED 5
|
|
#define _PAGE_BIT_DIRTY 6
|
|
#define _PAGE_BIT_FILE 6
|
|
#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
|
|
#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
|
|
#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
|
|
#define _PAGE_BIT_UNUSED2 10
|
|
#define _PAGE_BIT_UNUSED3 11
|
|
#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
|
|
|
|
#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
|
|
#define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW)
|
|
#define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER)
|
|
#define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT)
|
|
#define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD)
|
|
#define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED)
|
|
#define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY)
|
|
#define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */
|
|
#define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */
|
|
#define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1)
|
|
#define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2)
|
|
#define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3)
|
|
|
|
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
|
|
#define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX)
|
|
#else
|
|
#define _PAGE_NX 0
|
|
#endif
|
|
|
|
/* If _PAGE_PRESENT is clear, we use these: */
|
|
#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */
|
|
#define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE;
|
|
pte_present gives true */
|
|
|
|
#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
|
|
#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
|
|
|
|
#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
|
|
|
|
#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
|
|
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
|
|
|
|
#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
|
|
#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
|
|
#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
|
|
#define PAGE_COPY PAGE_COPY_NOEXEC
|
|
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
|
|
#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
|
|
|
|
#ifdef CONFIG_X86_32
|
|
#define _PAGE_KERNEL_EXEC \
|
|
(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
|
|
#define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
|
|
#endif /* __ASSEMBLY__ */
|
|
#else
|
|
#define __PAGE_KERNEL_EXEC \
|
|
(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
|
|
#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
|
|
#endif
|
|
|
|
#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
|
|
#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
|
|
#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
|
|
#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
|
|
#define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
|
|
#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
|
|
#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# define MAKE_GLOBAL(x) __pgprot((x))
|
|
#else
|
|
# define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL)
|
|
#endif
|
|
|
|
#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
|
|
#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
|
|
#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
|
|
#define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
|
|
#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
|
|
#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
|
|
#define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC)
|
|
#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
|
|
#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
|
|
|
|
/* xwr */
|
|
#define __P000 PAGE_NONE
|
|
#define __P001 PAGE_READONLY
|
|
#define __P010 PAGE_COPY
|
|
#define __P011 PAGE_COPY
|
|
#define __P100 PAGE_READONLY_EXEC
|
|
#define __P101 PAGE_READONLY_EXEC
|
|
#define __P110 PAGE_COPY_EXEC
|
|
#define __P111 PAGE_COPY_EXEC
|
|
|
|
#define __S000 PAGE_NONE
|
|
#define __S001 PAGE_READONLY
|
|
#define __S010 PAGE_SHARED
|
|
#define __S011 PAGE_SHARED
|
|
#define __S100 PAGE_READONLY_EXEC
|
|
#define __S101 PAGE_READONLY_EXEC
|
|
#define __S110 PAGE_SHARED_EXEC
|
|
#define __S111 PAGE_SHARED_EXEC
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* The following only work if pte_present() is true.
|
|
* Undefined behaviour if not..
|
|
*/
|
|
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
|
|
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
|
|
static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
|
|
static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
|
|
static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; }
|
|
|
|
static inline int pmd_large(pmd_t pte) {
|
|
return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
|
|
(_PAGE_PSE|_PAGE_PRESENT);
|
|
}
|
|
|
|
static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_DIRTY); }
|
|
static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_ACCESSED); }
|
|
static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_RW); }
|
|
static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_NX); }
|
|
static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | _PAGE_DIRTY); }
|
|
static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | _PAGE_ACCESSED); }
|
|
static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_RW); }
|
|
static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); }
|
|
static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_PSE); }
|
|
|
|
extern pteval_t __supported_pte_mask;
|
|
|
|
static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
|
|
{
|
|
return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) |
|
|
pgprot_val(pgprot)) & __supported_pte_mask);
|
|
}
|
|
|
|
static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
|
|
{
|
|
return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) |
|
|
pgprot_val(pgprot)) & __supported_pte_mask);
|
|
}
|
|
|
|
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 & ~_PAGE_NX;
|
|
val |= pgprot_val(newprot) & __supported_pte_mask;
|
|
|
|
return __pte(val);
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# include "pgtable_32.h"
|
|
#else
|
|
# include "pgtable_64.h"
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#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
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
|
|
#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
|
|
({ \
|
|
int __changed = !pte_same(*(ptep), entry); \
|
|
if (__changed && dirty) { \
|
|
*ptep = entry; \
|
|
pte_update_defer((vma)->vm_mm, (address), (ptep)); \
|
|
flush_tlb_page(vma, address); \
|
|
} \
|
|
__changed; \
|
|
})
|
|
|
|
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
|
|
#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
|
|
int __ret = 0; \
|
|
if (pte_young(*(ptep))) \
|
|
__ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
|
|
&(ptep)->pte); \
|
|
if (__ret) \
|
|
pte_update((vma)->vm_mm, addr, ptep); \
|
|
__ret; \
|
|
})
|
|
|
|
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
|
|
#define ptep_clear_flush_young(vma, address, ptep) \
|
|
({ \
|
|
int __young; \
|
|
__young = ptep_test_and_clear_young((vma), (address), (ptep)); \
|
|
if (__young) \
|
|
flush_tlb_page(vma, address); \
|
|
__young; \
|
|
})
|
|
|
|
#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);
|
|
}
|
|
|
|
#ifndef CONFIG_PARAVIRT
|
|
#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
|
|
#endif /* !CONFIG_PARAVIRT */
|
|
|
|
#include <asm-generic/pgtable.h>
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_PGTABLE_H */
|