da181a8b39
Add the three bare TLB accessor functions to paravirt-ops. Most amusingly, flush_tlb is redefined on SMP, so I can't call the paravirt op flush_tlb. Instead, I chose to indicate the actual flush type, kernel (global) vs. user (non-global). Global in this sense means using the global bit in the page table entry, which makes TLB entries persistent across CR3 reloads, not global as in the SMP sense of invoking remote shootdowns, so the term is confusingly overloaded. AK: folded in fix from Zach for PAE compilation Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@osdl.org>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
#ifndef _I386_PGTABLE_2LEVEL_H
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#define _I386_PGTABLE_2LEVEL_H
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#include <asm-generic/pgtable-nopmd.h>
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#define pte_ERROR(e) \
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printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
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#define pgd_ERROR(e) \
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printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
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/*
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* Certain architectures need to do special things when PTEs
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* within a page table are directly modified. Thus, the following
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* hook is made available.
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*/
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#ifndef CONFIG_PARAVIRT
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#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
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#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
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#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
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#endif
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#define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
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#define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval)
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#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
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#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
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#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
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#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte_low, 0))
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#define pte_page(x) pfn_to_page(pte_pfn(x))
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#define pte_none(x) (!(x).pte_low)
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#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
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#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
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#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
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/*
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* All present user pages are user-executable:
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*/
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static inline int pte_exec(pte_t pte)
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{
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return pte_user(pte);
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}
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/*
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* All present pages are kernel-executable:
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*/
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static inline int pte_exec_kernel(pte_t pte)
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{
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return 1;
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}
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/*
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* Bits 0, 6 and 7 are taken, split up the 29 bits of offset
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* into this range:
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*/
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#define PTE_FILE_MAX_BITS 29
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#define pte_to_pgoff(pte) \
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((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 ))
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#define pgoff_to_pte(off) \
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((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
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/* Encode and de-code a swap entry */
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#define __swp_type(x) (((x).val >> 1) & 0x1f)
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#define __swp_offset(x) ((x).val >> 8)
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#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
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#define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
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#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
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void vmalloc_sync_all(void);
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#endif /* _I386_PGTABLE_2LEVEL_H */
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