On 10/30/2017 06:08 PM, Balbir Singh wrote:
+
+static void pnv_npu2_invalidate_helper(struct npu_context *npu_context,
+ struct mm_struct *mm, unsigned long start,
+ unsigned long end, bool flush)
+{
+ unsigned long address;
+ bool is_thp;
+ unsigned int hshift, shift;
+
+ address = start;
+ do {
+ local_irq_disable();
+ find_linux_pte(mm->pgd, address, &is_thp, &hshift);
+ if (!is_thp)
+ shift = PAGE_SHIFT;
+ else
+ shift = hshift;
Is that correct? if is_thp is 0 can we derive shift from hshift? IIUC we
set hshift only
if it is a hugepage.
+ mmio_invalidate(npu_context, address > 0, address, flush,
+ shift);
+ local_irq_enable();
+ address += (1ull << shift);
+ } while (address < end);
}
-aneesh
