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riscv: mm: add param stride for __sbi_tlb_flush_range

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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>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Nanyong Sun 2021-04-30 16:28:49 +08:00 committed by Palmer Dabbelt
parent 141682f5b9
commit c3b2d67046
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GPG Key ID: 2E1319F35FBB1889
1 changed files with 5 additions and 5 deletions
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10
arch/riscv/mm/tlbflush.c
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@ -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);
}