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56 lines
1.2 KiB
56 lines
1.2 KiB
// 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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