mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
1c7037db50
Nobody uses flush_tlb_pgtables anymore, this patch removes all remaining traces of it from all archs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
#ifndef _X8664_TLBFLUSH_H
|
|
#define _X8664_TLBFLUSH_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/system.h>
|
|
|
|
static inline void __flush_tlb(void)
|
|
{
|
|
write_cr3(read_cr3());
|
|
}
|
|
|
|
static inline void __flush_tlb_all(void)
|
|
{
|
|
unsigned long cr4 = read_cr4();
|
|
write_cr4(cr4 & ~X86_CR4_PGE); /* clear PGE */
|
|
write_cr4(cr4); /* write old PGE again and flush TLBs */
|
|
}
|
|
|
|
#define __flush_tlb_one(addr) \
|
|
__asm__ __volatile__("invlpg (%0)" :: "r" (addr) : "memory")
|
|
|
|
|
|
/*
|
|
* TLB flushing:
|
|
*
|
|
* - flush_tlb() flushes the current mm struct TLBs
|
|
* - flush_tlb_all() flushes all processes TLBs
|
|
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
|
|
* - flush_tlb_page(vma, vmaddr) flushes one page
|
|
* - flush_tlb_range(vma, start, end) flushes a range of pages
|
|
* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
|
|
*
|
|
* x86-64 can only flush individual pages or full VMs. For a range flush
|
|
* we always do the full VM. Might be worth trying if for a small
|
|
* range a few INVLPGs in a row are a win.
|
|
*/
|
|
|
|
#ifndef CONFIG_SMP
|
|
|
|
#define flush_tlb() __flush_tlb()
|
|
#define flush_tlb_all() __flush_tlb_all()
|
|
#define local_flush_tlb() __flush_tlb()
|
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
if (mm == current->active_mm)
|
|
__flush_tlb();
|
|
}
|
|
|
|
static inline void flush_tlb_page(struct vm_area_struct *vma,
|
|
unsigned long addr)
|
|
{
|
|
if (vma->vm_mm == current->active_mm)
|
|
__flush_tlb_one(addr);
|
|
}
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
if (vma->vm_mm == current->active_mm)
|
|
__flush_tlb();
|
|
}
|
|
|
|
#else
|
|
|
|
#include <asm/smp.h>
|
|
|
|
#define local_flush_tlb() \
|
|
__flush_tlb()
|
|
|
|
extern void flush_tlb_all(void);
|
|
extern void flush_tlb_current_task(void);
|
|
extern void flush_tlb_mm(struct mm_struct *);
|
|
extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
|
|
|
|
#define flush_tlb() flush_tlb_current_task()
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
|
|
{
|
|
flush_tlb_mm(vma->vm_mm);
|
|
}
|
|
|
|
#define TLBSTATE_OK 1
|
|
#define TLBSTATE_LAZY 2
|
|
|
|
/* Roughly an IPI every 20MB with 4k pages for freeing page table
|
|
ranges. Cost is about 42k of memory for each CPU. */
|
|
#define ARCH_FREE_PTE_NR 5350
|
|
|
|
#endif
|
|
|
|
static inline void flush_tlb_kernel_range(unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
flush_tlb_all();
|
|
}
|
|
|
|
#endif /* _X8664_TLBFLUSH_H */
|