mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
ace8cb7545
By selecting HAVE_RCU_TABLE_INVALIDATE, we can rely on tlb_flush() being called if we fail to batch table pages for freeing. This in turn allows us to postpone walk-cache invalidation until tlb_finish_mmu(), which avoids lots of unnecessary DSBs and means we can shoot down the ASID if the range is large enough. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
77 lines
2 KiB
C
77 lines
2 KiB
C
/*
|
|
* Based on arch/arm/include/asm/tlb.h
|
|
*
|
|
* Copyright (C) 2002 Russell King
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_TLB_H
|
|
#define __ASM_TLB_H
|
|
|
|
#include <linux/pagemap.h>
|
|
#include <linux/swap.h>
|
|
|
|
static inline void __tlb_remove_table(void *_table)
|
|
{
|
|
free_page_and_swap_cache((struct page *)_table);
|
|
}
|
|
|
|
static void tlb_flush(struct mmu_gather *tlb);
|
|
|
|
#include <asm-generic/tlb.h>
|
|
|
|
static inline void tlb_flush(struct mmu_gather *tlb)
|
|
{
|
|
struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
|
|
bool last_level = !tlb->freed_tables;
|
|
unsigned long stride = tlb_get_unmap_size(tlb);
|
|
|
|
/*
|
|
* If we're tearing down the address space then we only care about
|
|
* invalidating the walk-cache, since the ASID allocator won't
|
|
* reallocate our ASID without invalidating the entire TLB.
|
|
*/
|
|
if (tlb->fullmm) {
|
|
if (!last_level)
|
|
flush_tlb_mm(tlb->mm);
|
|
return;
|
|
}
|
|
|
|
__flush_tlb_range(&vma, tlb->start, tlb->end, stride, last_level);
|
|
}
|
|
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
|
|
unsigned long addr)
|
|
{
|
|
pgtable_page_dtor(pte);
|
|
tlb_remove_table(tlb, pte);
|
|
}
|
|
|
|
#if CONFIG_PGTABLE_LEVELS > 2
|
|
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
|
|
unsigned long addr)
|
|
{
|
|
tlb_remove_table(tlb, virt_to_page(pmdp));
|
|
}
|
|
#endif
|
|
|
|
#if CONFIG_PGTABLE_LEVELS > 3
|
|
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
|
|
unsigned long addr)
|
|
{
|
|
tlb_remove_table(tlb, virt_to_page(pudp));
|
|
}
|
|
#endif
|
|
|
|
#endif
|