mirror of
https://github.com/torvalds/linux.git
synced 2026-04-25 18:12:26 -04:00
274d842fa1
Adds a local TLB flush operation that works given an mm_struct, VA to flush, and page size representation. Most implementations mirror the surrounding code. The book3s/32/tlbflush.h implementation is left as a BUILD_BUG because it is more complicated and not required for anything as yet. This removes the need to create a vm_area_struct, which the temporary patching mm work does not need. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221109045112.187069-8-bgray@linux.ibm.com
92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
|
|
#define _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
|
|
|
|
#include <linux/build_bug.h>
|
|
|
|
#define MMU_NO_CONTEXT (0)
|
|
/*
|
|
* TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
|
|
*/
|
|
void hash__flush_tlb_mm(struct mm_struct *mm);
|
|
void hash__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
|
|
void hash__flush_range(struct mm_struct *mm, unsigned long start, unsigned long end);
|
|
|
|
#ifdef CONFIG_SMP
|
|
void _tlbie(unsigned long address);
|
|
#else
|
|
static inline void _tlbie(unsigned long address)
|
|
{
|
|
asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
|
|
}
|
|
#endif
|
|
void _tlbia(void);
|
|
|
|
/*
|
|
* Called at the end of a mmu_gather operation to make sure the
|
|
* TLB flush is completely done.
|
|
*/
|
|
static inline void tlb_flush(struct mmu_gather *tlb)
|
|
{
|
|
/* 603 needs to flush the whole TLB here since it doesn't use a hash table. */
|
|
if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
|
|
_tlbia();
|
|
}
|
|
|
|
static inline void flush_range(struct mm_struct *mm, unsigned long start, unsigned long end)
|
|
{
|
|
start &= PAGE_MASK;
|
|
if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
|
|
hash__flush_range(mm, start, end);
|
|
else if (end - start <= PAGE_SIZE)
|
|
_tlbie(start);
|
|
else
|
|
_tlbia();
|
|
}
|
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
|
|
hash__flush_tlb_mm(mm);
|
|
else
|
|
_tlbia();
|
|
}
|
|
|
|
static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
|
|
{
|
|
if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
|
|
hash__flush_tlb_page(vma, vmaddr);
|
|
else
|
|
_tlbie(vmaddr);
|
|
}
|
|
|
|
static inline void
|
|
flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
|
|
{
|
|
flush_range(vma->vm_mm, start, end);
|
|
}
|
|
|
|
static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
|
|
{
|
|
flush_range(&init_mm, start, end);
|
|
}
|
|
|
|
static inline void local_flush_tlb_page(struct vm_area_struct *vma,
|
|
unsigned long vmaddr)
|
|
{
|
|
flush_tlb_page(vma, vmaddr);
|
|
}
|
|
|
|
static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
|
|
unsigned long vmaddr, int psize)
|
|
{
|
|
BUILD_BUG();
|
|
}
|
|
|
|
static inline void local_flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
flush_tlb_mm(mm);
|
|
}
|
|
|
|
#endif /* _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H */
|