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Subject[PATCH -next 3/4] riscv: mm: add param stride for __sbi_tlb_flush_range
Date
Add a parameter: stride for __sbi_tlb_flush_range(),
represent the page stride between the address of start and end.
Normally, the stride is PAGE_SIZE, and when flush huge page
address, the stride can be the huge page size such as:PMD_SIZE,
then it only need to flush one tlb entry if the address range
within PMD_SIZE.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
arch/riscv/mm/tlbflush.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c
index 720b443c4..382781abf 100644
--- a/arch/riscv/mm/tlbflush.c
+++ b/arch/riscv/mm/tlbflush.c
@@ -15,7 +15,7 @@ void flush_tlb_all(void)
* Kernel may panic if cmask is NULL.
*/
static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,
- unsigned long size)
+ unsigned long size, unsigned long stride)
{
struct cpumask hmask;
unsigned int cpuid;
@@ -27,7 +27,7 @@ static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,

if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) {
/* local cpu is the only cpu present in cpumask */
- if (size <= PAGE_SIZE)
+ if (size <= stride)
local_flush_tlb_page(start);
else
local_flush_tlb_all();
@@ -41,16 +41,16 @@ static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,

void flush_tlb_mm(struct mm_struct *mm)
{
- __sbi_tlb_flush_range(mm_cpumask(mm), 0, -1);
+ __sbi_tlb_flush_range(mm_cpumask(mm), 0, -1, PAGE_SIZE);
}

void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
- __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), addr, PAGE_SIZE);
+ __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), addr, PAGE_SIZE, PAGE_SIZE);
}

void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
- __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), start, end - start);
+ __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), start, end - start, PAGE_SIZE);
}
--
2.25.1
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