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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-11-05 10:00:15 +0800 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2019-03-07 05:29:35 +0800 |
| commit | 195568a10a264a733ec7151a657ab054a0af768f (patch) | |
| tree | a2db0ec2f201c8fd492d4807ecb89e0c8aa44707 | |
| parent | ef5cbcb6bfc8cfc7bba58c74c0765c471ef86277 (diff) | |
| download | linux-195568a10a264a733ec7151a657ab054a0af768f.tar.bz2 | |
nios2: flush_tlb_page use PID based flush
flush_tlb_page is for flushing user pages, so it should not be using
flush_tlb_one (which flushes all pages).
This patch implements it with the flush_tlb_range, which is a user
flush that does the right thing.
flush_tlb_one is made static to mm/tlb.c because it's a bit confusing.
It is used in do_page_fault to flush the kernel non-linear mappings,
so that is replaced with flush_tlb_kernel_page. The end result is that
functionality is identical.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
| -rw-r--r-- | arch/nios2/include/asm/tlbflush.h | 13 | ||||
| -rw-r--r-- | arch/nios2/mm/fault.c | 2 | ||||
| -rw-r--r-- | arch/nios2/mm/tlb.c | 18 |
3 files changed, 19 insertions, 14 deletions
diff --git a/arch/nios2/include/asm/tlbflush.h b/arch/nios2/include/asm/tlbflush.h index e19652fca1c6..982a7ecf221f 100644 --- a/arch/nios2/include/asm/tlbflush.h +++ b/arch/nios2/include/asm/tlbflush.h @@ -26,21 +26,26 @@ struct mm_struct; * * - flush_tlb_all() flushes all processes TLB entries * - flush_tlb_mm(mm) flushes the specified mm context TLB entries - * - flush_tlb_page(vma, vmaddr) flushes one page * - flush_tlb_range(vma, start, end) flushes a range of pages + * - flush_tlb_page(vma, address) flushes a page * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages + * - flush_tlb_kernel_page(address) flushes a kernel page */ extern void flush_tlb_all(void); extern void flush_tlb_mm(struct mm_struct *mm); 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); -extern void flush_tlb_one(unsigned long vaddr); static inline void flush_tlb_page(struct vm_area_struct *vma, - unsigned long addr) + unsigned long address) { - flush_tlb_one(addr); + flush_tlb_range(vma, address, address + PAGE_SIZE); +} + +static inline void flush_tlb_kernel_page(unsigned long address) +{ + flush_tlb_kernel_range(address, address + PAGE_SIZE); } #endif /* _ASM_NIOS2_TLBFLUSH_H */ diff --git a/arch/nios2/mm/fault.c b/arch/nios2/mm/fault.c index 24fd84cf6006..cf76fa3f457b 100644 --- a/arch/nios2/mm/fault.c +++ b/arch/nios2/mm/fault.c @@ -271,7 +271,7 @@ vmalloc_fault: if (!pte_present(*pte_k)) goto no_context; - flush_tlb_one(address); + flush_tlb_kernel_page(address); return; } } diff --git a/arch/nios2/mm/tlb.c b/arch/nios2/mm/tlb.c index cf10326aab1c..99e047082993 100644 --- a/arch/nios2/mm/tlb.c +++ b/arch/nios2/mm/tlb.c @@ -102,19 +102,11 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, } } -void flush_tlb_kernel_range(unsigned long start, unsigned long end) -{ - while (start < end) { - flush_tlb_one(start); - start += PAGE_SIZE; - } -} - /* * This one is only used for pages with the global bit set so we don't care * much about the ASID. */ -void flush_tlb_one(unsigned long addr) +static void flush_tlb_one(unsigned long addr) { unsigned int way; unsigned long org_misc, pid_misc; @@ -154,6 +146,14 @@ void flush_tlb_one(unsigned long addr) WRCTL(CTL_TLBMISC, org_misc); } +void flush_tlb_kernel_range(unsigned long start, unsigned long end) +{ + while (start < end) { + flush_tlb_one(start); + start += PAGE_SIZE; + } +} + void dump_tlb_line(unsigned long line) { unsigned int way; |