3847231167
based on: Subject: x86: unify pgtable accessors which use supported_pte_mask From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
182 lines
6.7 KiB
C
182 lines
6.7 KiB
C
#ifndef _ASM_X86_PGTABLE_H
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#define _ASM_X86_PGTABLE_H
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#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
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#define FIRST_USER_ADDRESS 0
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#define _PAGE_BIT_PRESENT 0
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#define _PAGE_BIT_RW 1
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#define _PAGE_BIT_USER 2
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#define _PAGE_BIT_PWT 3
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#define _PAGE_BIT_PCD 4
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#define _PAGE_BIT_ACCESSED 5
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#define _PAGE_BIT_DIRTY 6
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#define _PAGE_BIT_FILE 6
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#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
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#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
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#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
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#define _PAGE_BIT_UNUSED2 10
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#define _PAGE_BIT_UNUSED3 11
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#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
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#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
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#define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW)
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#define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER)
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#define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT)
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#define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD)
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#define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED)
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#define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY)
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#define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */
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#define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */
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#define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1)
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#define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2)
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#define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3)
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#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
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#define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX)
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#else
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#define _PAGE_NX 0
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#endif
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/* If _PAGE_PRESENT is clear, we use these: */
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#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */
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#define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE;
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pte_present gives true */
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#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
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#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
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#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
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#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
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#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
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#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
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#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
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#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
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#define PAGE_COPY PAGE_COPY_NOEXEC
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#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
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#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
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#ifdef CONFIG_X86_32
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#define _PAGE_KERNEL_EXEC \
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(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
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#define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX)
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#ifndef __ASSEMBLY__
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extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
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#endif /* __ASSEMBLY__ */
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#else
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#define __PAGE_KERNEL_EXEC \
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(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
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#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
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#endif
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#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
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#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
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#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
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#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
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#define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
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#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
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#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
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#ifdef CONFIG_X86_32
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# define MAKE_GLOBAL(x) __pgprot((x))
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#else
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# define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL)
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#endif
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#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
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#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
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#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
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#define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
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#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
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#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
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#define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC)
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#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
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#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
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/* xwr */
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#define __P000 PAGE_NONE
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#define __P001 PAGE_READONLY
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#define __P010 PAGE_COPY
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#define __P011 PAGE_COPY
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#define __P100 PAGE_READONLY_EXEC
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#define __P101 PAGE_READONLY_EXEC
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#define __P110 PAGE_COPY_EXEC
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#define __P111 PAGE_COPY_EXEC
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#define __S000 PAGE_NONE
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#define __S001 PAGE_READONLY
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#define __S010 PAGE_SHARED
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#define __S011 PAGE_SHARED
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#define __S100 PAGE_READONLY_EXEC
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#define __S101 PAGE_READONLY_EXEC
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#define __S110 PAGE_SHARED_EXEC
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#define __S111 PAGE_SHARED_EXEC
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#ifndef __ASSEMBLY__
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/*
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* The following only work if pte_present() is true.
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* Undefined behaviour if not..
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*/
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static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
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static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
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static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
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static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
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static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; }
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static inline int pmd_large(pmd_t pte) {
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return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
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(_PAGE_PSE|_PAGE_PRESENT);
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}
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static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_DIRTY); }
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static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_ACCESSED); }
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static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_RW); }
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static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_NX); }
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static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | _PAGE_DIRTY); }
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static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | _PAGE_ACCESSED); }
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static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_RW); }
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static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); }
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static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_PSE); }
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extern pteval_t __supported_pte_mask;
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static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
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{
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return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) |
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pgprot_val(pgprot)) & __supported_pte_mask);
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}
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static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
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{
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return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) |
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pgprot_val(pgprot)) & __supported_pte_mask);
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}
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static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
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{
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pteval_t val = pte_val(pte);
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/*
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* Chop off the NX bit (if present), and add the NX portion of
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* the newprot (if present):
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*/
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val &= _PAGE_CHG_MASK & ~_PAGE_NX;
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val |= pgprot_val(newprot) & __supported_pte_mask;
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return __pte(val);
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}
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_X86_32
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# include "pgtable_32.h"
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#else
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# include "pgtable_64.h"
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#endif
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#endif /* _ASM_X86_PGTABLE_H */
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