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-rw-r--r--arch/parisc/kernel/cache.c41
1 files changed, 32 insertions, 9 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 79089778725b..e3b45546d589 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -543,7 +543,8 @@ void flush_cache_mm(struct mm_struct *mm)
rp3440, etc. So, avoid it if the mm isn't too big. */
if ((!IS_ENABLED(CONFIG_SMP) || !arch_irqs_disabled()) &&
mm_total_size(mm) >= parisc_cache_flush_threshold) {
- flush_tlb_all();
+ if (mm->context)
+ flush_tlb_all();
flush_cache_all();
return;
}
@@ -571,6 +572,8 @@ void flush_cache_mm(struct mm_struct *mm)
pfn = pte_pfn(*ptep);
if (!pfn_valid(pfn))
continue;
+ if (unlikely(mm->context))
+ flush_tlb_page(vma, addr);
__flush_cache_page(vma, addr, PFN_PHYS(pfn));
}
}
@@ -579,26 +582,46 @@ void flush_cache_mm(struct mm_struct *mm)
void flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
+ pgd_t *pgd;
+ unsigned long addr;
+
if ((!IS_ENABLED(CONFIG_SMP) || !arch_irqs_disabled()) &&
end - start >= parisc_cache_flush_threshold) {
- flush_tlb_range(vma, start, end);
+ if (vma->vm_mm->context)
+ flush_tlb_range(vma, start, end);
flush_cache_all();
return;
}
- flush_user_dcache_range_asm(start, end);
- if (vma->vm_flags & VM_EXEC)
- flush_user_icache_range_asm(start, end);
- flush_tlb_range(vma, start, end);
+ if (vma->vm_mm->context == mfsp(3)) {
+ flush_user_dcache_range_asm(start, end);
+ if (vma->vm_flags & VM_EXEC)
+ flush_user_icache_range_asm(start, end);
+ flush_tlb_range(vma, start, end);
+ return;
+ }
+
+ pgd = vma->vm_mm->pgd;
+ for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) {
+ unsigned long pfn;
+ pte_t *ptep = get_ptep(pgd, addr);
+ if (!ptep)
+ continue;
+ pfn = pte_pfn(*ptep);
+ if (pfn_valid(pfn)) {
+ if (unlikely(vma->vm_mm->context))
+ flush_tlb_page(vma, addr);
+ __flush_cache_page(vma, addr, PFN_PHYS(pfn));
+ }
+ }
}
void
flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
{
- BUG_ON(!vma->vm_mm->context);
-
if (pfn_valid(pfn)) {
- flush_tlb_page(vma, vmaddr);
+ if (likely(vma->vm_mm->context))
+ flush_tlb_page(vma, vmaddr);
__flush_cache_page(vma, vmaddr, PFN_PHYS(pfn));
}
}