Unverified Commit c3b2d670 authored by Nanyong Sun's avatar Nanyong Sun Committed by Palmer Dabbelt
Browse files

riscv: mm: add param stride for __sbi_tlb_flush_range 



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: default avatarNanyong Sun <sunnanyong@huawei.com>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent 141682f5

arch/riscv/mm/tlbflush.c

+5 −5
Original line number Diff line number Diff line
@@ -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);

}