152 lines
3.4 KiB
C
152 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/sched.h>
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#include <asm/sbi.h>
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#include <asm/mmu_context.h>
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static inline void local_flush_tlb_all_asid(unsigned long asid)
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{
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__asm__ __volatile__ ("sfence.vma x0, %0"
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:
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: "r" (asid)
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: "memory");
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}
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static inline void local_flush_tlb_page_asid(unsigned long addr,
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unsigned long asid)
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{
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__asm__ __volatile__ ("sfence.vma %0, %1"
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:
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: "r" (addr), "r" (asid)
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: "memory");
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}
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static inline void local_flush_tlb_range(unsigned long start,
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unsigned long size, unsigned long stride)
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{
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if (size <= stride)
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local_flush_tlb_page(start);
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else
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local_flush_tlb_all();
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}
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static inline void local_flush_tlb_range_asid(unsigned long start,
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unsigned long size, unsigned long stride, unsigned long asid)
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{
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if (size <= stride)
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local_flush_tlb_page_asid(start, asid);
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else
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local_flush_tlb_all_asid(asid);
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}
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static void __ipi_flush_tlb_all(void *info)
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{
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local_flush_tlb_all();
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}
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void flush_tlb_all(void)
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{
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if (riscv_use_ipi_for_rfence())
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on_each_cpu(__ipi_flush_tlb_all, NULL, 1);
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else
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sbi_remote_sfence_vma(NULL, 0, -1);
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}
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struct flush_tlb_range_data {
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unsigned long asid;
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unsigned long start;
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unsigned long size;
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unsigned long stride;
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};
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static void __ipi_flush_tlb_range_asid(void *info)
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{
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struct flush_tlb_range_data *d = info;
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local_flush_tlb_range_asid(d->start, d->size, d->stride, d->asid);
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}
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static void __ipi_flush_tlb_range(void *info)
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{
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struct flush_tlb_range_data *d = info;
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local_flush_tlb_range(d->start, d->size, d->stride);
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}
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static void __flush_tlb_range(struct mm_struct *mm, unsigned long start,
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unsigned long size, unsigned long stride)
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{
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struct flush_tlb_range_data ftd;
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struct cpumask *cmask = mm_cpumask(mm);
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unsigned int cpuid;
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bool broadcast;
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if (cpumask_empty(cmask))
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return;
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cpuid = get_cpu();
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/* check if the tlbflush needs to be sent to other CPUs */
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broadcast = cpumask_any_but(cmask, cpuid) < nr_cpu_ids;
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if (static_branch_unlikely(&use_asid_allocator)) {
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unsigned long asid = atomic_long_read(&mm->context.id) & asid_mask;
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if (broadcast) {
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if (riscv_use_ipi_for_rfence()) {
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ftd.asid = asid;
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ftd.start = start;
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ftd.size = size;
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ftd.stride = stride;
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on_each_cpu_mask(cmask,
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__ipi_flush_tlb_range_asid,
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&ftd, 1);
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} else
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sbi_remote_sfence_vma_asid(cmask,
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start, size, asid);
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} else {
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local_flush_tlb_range_asid(start, size, stride, asid);
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}
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} else {
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if (broadcast) {
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if (riscv_use_ipi_for_rfence()) {
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ftd.asid = 0;
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ftd.start = start;
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ftd.size = size;
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ftd.stride = stride;
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on_each_cpu_mask(cmask,
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__ipi_flush_tlb_range,
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&ftd, 1);
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} else
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sbi_remote_sfence_vma(cmask, start, size);
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} else {
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local_flush_tlb_range(start, size, stride);
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}
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}
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put_cpu();
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}
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void flush_tlb_mm(struct mm_struct *mm)
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{
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__flush_tlb_range(mm, 0, -1, PAGE_SIZE);
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}
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void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
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{
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__flush_tlb_range(vma->vm_mm, addr, PAGE_SIZE, PAGE_SIZE);
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}
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void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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__flush_tlb_range(vma->vm_mm, start, end - start, PAGE_SIZE);
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}
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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__flush_tlb_range(vma->vm_mm, start, end - start, PMD_SIZE);
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}
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#endif
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