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| author | Peter Zijlstra <peterz@infradead.org> | 2018-08-27 13:00:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-04-03 10:32:41 +0200 |
| commit | e7fd28a706bfaf9cd65dccf18140187f7ad04839 (patch) | |
| tree | 23077332371304ff92fd2b9ac64286afd5c69e16 /include/asm-generic/tlb.h | |
| parent | ed6a79352cad00e9a49d6e438be40e45107207bf (diff) | |
| download | linux-e7fd28a706bfaf9cd65dccf18140187f7ad04839.tar.gz linux-e7fd28a706bfaf9cd65dccf18140187f7ad04839.tar.bz2 linux-e7fd28a706bfaf9cd65dccf18140187f7ad04839.zip | |
asm-generic/tlb, arch: Provide generic VIPT cache flush
The one obvious thing SH and ARM want is a sensible default for
tlb_start_vma(). (also: https://lkml.org/lkml/2004/1/15/6 )
Avoid all VIPT architectures providing their own tlb_start_vma()
implementation and rely on architectures to provide a no-op
flush_cache_range() when it is not relevant.
This patch makes tlb_start_vma() default to flush_cache_range(), which
should be right and sufficient. The only exceptions that I found where
(oddly):
- m68k-mmu
- sparc64
- unicore
Those architectures appear to have flush_cache_range(), but their
current tlb_start_vma() does not call it.
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: David Miller <davem@davemloft.net>
Cc: Guan Xuetao <gxt@pku.edu.cn>
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>
Diffstat (limited to 'include/asm-generic/tlb.h')
| -rw-r--r-- | include/asm-generic/tlb.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h index e75620e41ba4..f0aa53db5e60 100644 --- a/include/asm-generic/tlb.h +++ b/include/asm-generic/tlb.h @@ -19,6 +19,7 @@ #include <linux/swap.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> +#include <asm/cacheflush.h> #ifdef CONFIG_MMU @@ -356,17 +357,19 @@ static inline unsigned long tlb_get_unmap_size(struct mmu_gather *tlb) * the vmas are adjusted to only cover the region to be torn down. */ #ifndef tlb_start_vma -#define tlb_start_vma(tlb, vma) do { } while (0) +#define tlb_start_vma(tlb, vma) \ +do { \ + if (!tlb->fullmm) \ + flush_cache_range(vma, vma->vm_start, vma->vm_end); \ +} while (0) #endif -#define __tlb_end_vma(tlb, vma) \ - do { \ - if (!tlb->fullmm) \ - tlb_flush_mmu_tlbonly(tlb); \ - } while (0) - #ifndef tlb_end_vma -#define tlb_end_vma __tlb_end_vma +#define tlb_end_vma(tlb, vma) \ +do { \ + if (!tlb->fullmm) \ + tlb_flush_mmu_tlbonly(tlb); \ +} while (0) #endif #ifndef __tlb_remove_tlb_entry |