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authorNicholas Piggin <npiggin@gmail.com>2018-11-05 10:00:15 +0800
committerLey Foon Tan <ley.foon.tan@intel.com>2019-03-07 05:29:35 +0800
commit195568a10a264a733ec7151a657ab054a0af768f (patch)
treea2db0ec2f201c8fd492d4807ecb89e0c8aa44707 /arch/nios2
parentnios2: update_mmu_cache clear the old entry from the TLB (diff)
downloadlinux-dev-195568a10a264a733ec7151a657ab054a0af768f.tar.xz
linux-dev-195568a10a264a733ec7151a657ab054a0af768f.zip
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>
Diffstat (limited to 'arch/nios2')
-rw-r--r--arch/nios2/include/asm/tlbflush.h13
-rw-r--r--arch/nios2/mm/fault.c2
-rw-r--r--arch/nios2/mm/tlb.c18
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;