mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 04:37:57 +07:00
5f307be18b
Provide a generic tlb_flush() implementation that relies on flush_tlb_range(). This is a little awkward because flush_tlb_range() assumes a VMA for range invalidation, but we no longer have one. Audit of all flush_tlb_range() implementations shows only vma->vm_mm and vma->vm_flags are used, and of the latter only VM_EXEC (I-TLB invalidates) and VM_HUGETLB (large TLB invalidate) are used. Therefore, track VM_EXEC and VM_HUGETLB in two more bits, and create a 'fake' VMA. This allows architectures that have a reasonably efficient flush_tlb_range() to not require any additional effort. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
79 lines
2.0 KiB
C
79 lines
2.0 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);
|
|
}
|
|
|
|
#define tlb_flush tlb_flush
|
|
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
|