x86/amd-iommu: Make np-cache a global flag

The non-present cache flag was IOMMU local until now which
doesn't make sense. Make this a global flag so we can remove
the lase user of 'struct iommu' in the map/unmap path.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index a1bd99d390ab..5ebd24e4fc57 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -131,12 +131,6 @@ static void amd_iommu_stats_init(void)
 
 #endif
 
-/* returns !0 if the IOMMU is caching non-present entries in its TLB */
-static int iommu_has_npcache(struct amd_iommu *iommu)
-{
-        return iommu->cap & (1UL << IOMMU_CAP_NPCACHE);
-}
-
 /****************************************************************************
  *
  * Interrupt handling functions
@@ -1713,7 +1707,7 @@ retry:
         if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {
                 iommu_flush_tlb(&dma_dom->domain);
                 dma_dom->need_flush = false;
-        } else if (unlikely(iommu_has_npcache(iommu)))
+        } else if (unlikely(amd_iommu_np_cache))
                 iommu_flush_pages(&dma_dom->domain, address, size);
 
 out: