64f60841c0
Give the page fault code a specialized path. There is only one page to look at, so there's no point in going into the general page table walking code. There's only going to be one host operation, so there are no opportunities for merging. So, we go straight to the pte we want, figure out what needs doing, and do it. While I was in here, I fixed the wart where the address passed to unmap was a void *, but an unsigned long to map and protect. This gives me just under 10% on a kernel build. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __SKAS_MODE_KERN_H__
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#define __SKAS_MODE_KERN_H__
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#include "linux/sched.h"
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#include "asm/page.h"
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#include "asm/ptrace.h"
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extern void flush_thread_skas(void);
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extern void switch_to_skas(void *prev, void *next);
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extern void start_thread_skas(struct pt_regs *regs, unsigned long eip,
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unsigned long esp);
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extern int copy_thread_skas(int nr, unsigned long clone_flags,
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unsigned long sp, unsigned long stack_top,
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struct task_struct *p, struct pt_regs *regs);
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extern void release_thread_skas(struct task_struct *task);
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extern void init_idle_skas(void);
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extern void flush_tlb_kernel_range_skas(unsigned long start,
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unsigned long end);
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extern void flush_tlb_kernel_vm_skas(void);
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extern void __flush_tlb_one_skas(unsigned long addr);
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extern void flush_tlb_range_skas(struct vm_area_struct *vma,
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unsigned long start, unsigned long end);
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extern void flush_tlb_mm_skas(struct mm_struct *mm);
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extern void force_flush_all_skas(void);
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extern long execute_syscall_skas(void *r);
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extern void before_mem_skas(unsigned long unused);
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extern unsigned long set_task_sizes_skas(unsigned long *task_size_out);
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extern int start_uml_skas(void);
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extern int external_pid_skas(struct task_struct *task);
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extern int thread_pid_skas(struct task_struct *task);
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extern void flush_tlb_page_skas(struct vm_area_struct *vma,
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unsigned long address);
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#define kmem_end_skas (host_task_size - 1024 * 1024)
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#endif
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