mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-28 13:34:38 +08:00
6210230725
BenH's commit a741e67969 in powerpc.git,
although (AFAICT) only intended to affect ppc64, also has side-effects
which break 44x. I think 40x, 8xx and Freescale Book E are also
affected, though I haven't tested them.
The problem lies in unconditionally removing flush_tlb_pending() from
the versions of flush_tlb_mm(), flush_tlb_range() and
flush_tlb_kernel_range() used on ppc64 - which are also used the
embedded platforms mentioned above.
The patch below cleans up the convoluted #ifdef logic in tlbflush.h,
in the process restoring the necessary flushes for the software TLB
platforms. There are three sets of definitions for the flushing
hooks: the software TLB versions (revised to avoid using names which
appear to related to TLB batching), the 32-bit hash based versions
(external functions) amd the 64-bit hash based versions (which
implement batching).
It also moves the declaration of update_mmu_cache() to always be in
tlbflush.h (previously it was in tlbflush.h except for PPC64, where it
was in pgtable.h).
Booted on Ebony (440GP) and compiled for 64-bit and 32-bit
multiplatform.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
#ifndef _ASM_POWERPC_TLBFLUSH_H
|
|
#define _ASM_POWERPC_TLBFLUSH_H
|
|
/*
|
|
* TLB flushing:
|
|
*
|
|
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
|
|
* - flush_tlb_page(vma, vmaddr) flushes one page
|
|
* - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
|
|
* - flush_tlb_range(vma, start, end) flushes a range of pages
|
|
* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
|
|
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#ifdef __KERNEL__
|
|
|
|
struct mm_struct;
|
|
struct vm_area_struct;
|
|
|
|
#if defined(CONFIG_4xx) || defined(CONFIG_8xx) || defined(CONFIG_FSL_BOOKE)
|
|
/*
|
|
* TLB flushing for software loaded TLB chips
|
|
*
|
|
* TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
|
|
* flush_tlb_kernel_range are best implemented as tlbia vs
|
|
* specific tlbie's
|
|
*/
|
|
|
|
extern void _tlbie(unsigned long address);
|
|
|
|
#if defined(CONFIG_40x) || defined(CONFIG_8xx)
|
|
#define _tlbia() asm volatile ("tlbia; sync" : : : "memory")
|
|
#else /* CONFIG_44x || CONFIG_FSL_BOOKE */
|
|
extern void _tlbia(void);
|
|
#endif
|
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
_tlbia();
|
|
}
|
|
|
|
static inline void flush_tlb_page(struct vm_area_struct *vma,
|
|
unsigned long vmaddr)
|
|
{
|
|
_tlbie(vmaddr);
|
|
}
|
|
|
|
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
|
|
unsigned long vmaddr)
|
|
{
|
|
_tlbie(vmaddr);
|
|
}
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
_tlbia();
|
|
}
|
|
|
|
static inline void flush_tlb_kernel_range(unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
_tlbia();
|
|
}
|
|
|
|
#elif defined(CONFIG_PPC32)
|
|
/*
|
|
* TLB flushing for "classic" hash-MMMU 32-bit CPUs, 6xx, 7xx, 7xxx
|
|
*/
|
|
extern void _tlbie(unsigned long address);
|
|
extern void _tlbia(void);
|
|
|
|
extern void flush_tlb_mm(struct mm_struct *mm);
|
|
extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
|
|
extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
|
|
extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
|
|
unsigned long end);
|
|
extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
|
|
|
|
#else
|
|
/*
|
|
* TLB flushing for 64-bit has-MMU CPUs
|
|
*/
|
|
|
|
#include <linux/percpu.h>
|
|
#include <asm/page.h>
|
|
|
|
#define PPC64_TLB_BATCH_NR 192
|
|
|
|
struct ppc64_tlb_batch {
|
|
int active;
|
|
unsigned long index;
|
|
struct mm_struct *mm;
|
|
real_pte_t pte[PPC64_TLB_BATCH_NR];
|
|
unsigned long vaddr[PPC64_TLB_BATCH_NR];
|
|
unsigned int psize;
|
|
};
|
|
DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
|
|
|
|
extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
|
|
|
|
extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, unsigned long pte, int huge);
|
|
|
|
#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
|
|
|
|
static inline void arch_enter_lazy_mmu_mode(void)
|
|
{
|
|
struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
|
|
|
|
batch->active = 1;
|
|
}
|
|
|
|
static inline void arch_leave_lazy_mmu_mode(void)
|
|
{
|
|
struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
|
|
|
|
if (batch->index)
|
|
__flush_tlb_pending(batch);
|
|
batch->active = 0;
|
|
}
|
|
|
|
#define arch_flush_lazy_mmu_mode() do {} while (0)
|
|
|
|
|
|
extern void flush_hash_page(unsigned long va, real_pte_t pte, int psize,
|
|
int local);
|
|
extern void flush_hash_range(unsigned long number, int local);
|
|
|
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
}
|
|
|
|
static inline void flush_tlb_page(struct vm_area_struct *vma,
|
|
unsigned long vmaddr)
|
|
{
|
|
}
|
|
|
|
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
|
|
unsigned long vmaddr)
|
|
{
|
|
}
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
}
|
|
|
|
static inline void flush_tlb_kernel_range(unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* This gets called at the end of handling a page fault, when
|
|
* the kernel has put a new PTE into the page table for the process.
|
|
* We use it to ensure coherency between the i-cache and d-cache
|
|
* for the page which has just been mapped in.
|
|
* On machines which use an MMU hash table, we use this to put a
|
|
* corresponding HPTE into the hash table ahead of time, instead of
|
|
* waiting for the inevitable extra hash-table miss exception.
|
|
*/
|
|
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
|
|
|
|
/*
|
|
* This is called in munmap when we have freed up some page-table
|
|
* pages. We don't need to do anything here, there's nothing special
|
|
* about our page-table pages. -- paulus
|
|
*/
|
|
static inline void flush_tlb_pgtables(struct mm_struct *mm,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
}
|
|
|
|
#endif /*__KERNEL__ */
|
|
#endif /* _ASM_POWERPC_TLBFLUSH_H */
|