1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/sched.h>
7 #include <asm/mmu_context.h>
9 static inline void local_flush_tlb_all_asid(unsigned long asid)
11 __asm__ __volatile__ ("sfence.vma x0, %0"
17 static inline void local_flush_tlb_page_asid(unsigned long addr,
20 __asm__ __volatile__ ("sfence.vma %0, %1"
22 : "r" (addr), "r" (asid)
26 void flush_tlb_all(void)
28 sbi_remote_sfence_vma(NULL, 0, -1);
31 static void __sbi_tlb_flush_range(struct mm_struct *mm, unsigned long start,
32 unsigned long size, unsigned long stride)
34 struct cpumask *cmask = mm_cpumask(mm);
39 if (cpumask_empty(cmask))
43 /* check if the tlbflush needs to be sent to other CPUs */
44 broadcast = cpumask_any_but(cmask, cpuid) < nr_cpu_ids;
45 if (static_branch_unlikely(&use_asid_allocator)) {
46 unsigned long asid = atomic_long_read(&mm->context.id);
49 riscv_cpuid_to_hartid_mask(cmask, &hmask);
50 sbi_remote_sfence_vma_asid(cpumask_bits(&hmask),
52 } else if (size <= stride) {
53 local_flush_tlb_page_asid(start, asid);
55 local_flush_tlb_all_asid(asid);
59 riscv_cpuid_to_hartid_mask(cmask, &hmask);
60 sbi_remote_sfence_vma(cpumask_bits(&hmask),
62 } else if (size <= stride) {
63 local_flush_tlb_page(start);
65 local_flush_tlb_all();
72 void flush_tlb_mm(struct mm_struct *mm)
74 __sbi_tlb_flush_range(mm, 0, -1, PAGE_SIZE);
77 void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
79 __sbi_tlb_flush_range(vma->vm_mm, addr, PAGE_SIZE, PAGE_SIZE);
82 void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
85 __sbi_tlb_flush_range(vma->vm_mm, start, end - start, PAGE_SIZE);
87 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
88 void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
91 __sbi_tlb_flush_range(vma->vm_mm, start, end - start, PMD_SIZE);