diff options
| -rw-r--r-- | arch/parisc/kernel/cache.c | 34 |
1 files changed, 14 insertions, 20 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index c32a09095216..3a64ebb39ac7 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -539,6 +539,10 @@ void flush_cache_mm(struct mm_struct *mm) struct vm_area_struct *vma; pgd_t *pgd; + /* Flush the TLB to avoid speculation if coherency is required. */ + if (parisc_requires_coherency()) + flush_tlb_all(); + /* Flushing the whole cache on each cpu takes forever on rp3440, etc. So, avoid it if the mm isn't too big. */ if (mm_total_size(mm) >= parisc_cache_flush_threshold) { @@ -577,33 +581,22 @@ void flush_cache_mm(struct mm_struct *mm) void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { - unsigned long addr; - pgd_t *pgd; - BUG_ON(!vma->vm_mm->context); + /* Flush the TLB to avoid speculation if coherency is required. */ + if (parisc_requires_coherency()) + flush_tlb_range(vma, start, end); + if ((end - start) >= parisc_cache_flush_threshold) { flush_cache_all(); return; } - 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); - return; - } + BUG_ON(vma->vm_mm->context != mfsp(3)); - pgd = vma->vm_mm->pgd; - for (addr = start & PAGE_MASK; addr < 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)) - __flush_cache_page(vma, addr, PFN_PHYS(pfn)); - } + flush_user_dcache_range_asm(start, end); + if (vma->vm_flags & VM_EXEC) + flush_user_icache_range_asm(start, end); } void @@ -612,7 +605,8 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long BUG_ON(!vma->vm_mm->context); if (pfn_valid(pfn)) { - flush_tlb_page(vma, vmaddr); + if (parisc_requires_coherency()) + flush_tlb_page(vma, vmaddr); __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn)); } } |