6efb16b1d5
If tlbflush request is for page only, there is no need to do a complete local tlb shootdown. Just do a local tlb flush for the given address. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
57 lines
1.2 KiB
C
57 lines
1.2 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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void flush_tlb_all(void)
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{
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sbi_remote_sfence_vma(NULL, 0, -1);
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}
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/*
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* This function must not be called with cmask being null.
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* Kernel may panic if cmask is NULL.
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*/
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static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,
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unsigned long size)
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{
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struct cpumask hmask;
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unsigned int cpuid;
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if (cpumask_empty(cmask))
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return;
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cpuid = get_cpu();
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if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) {
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/* local cpu is the only cpu present in cpumask */
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if (size <= PAGE_SIZE)
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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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} else {
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riscv_cpuid_to_hartid_mask(cmask, &hmask);
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sbi_remote_sfence_vma(cpumask_bits(&hmask), start, size);
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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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__sbi_tlb_flush_range(mm_cpumask(mm), 0, -1);
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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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__sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), addr, 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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__sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), start, end - start);
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}
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