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This allows the amd iommu non present cache to be flushed if amd_iommu_np_cache is set. Signed-off-by: Tom Murphy --- drivers/iommu/amd_iommu.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index b319e51c379b..2d4ee10626b4 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1319,6 +1319,18 @@ static void domain_flush_devices(struct protection_domain *domain) device_flush_dte(dev_data); } +static void amd_iommu_flush_np_cache(struct iommu_domain *domain, + unsigned long iova, size_t size) +{ + struct protection_domain *dom = to_pdomain(domain); + + if (unlikely(amd_iommu_np_cache)) { + domain_flush_pages(dom, iova, size); + domain_flush_complete(dom); + } +} + + /**************************************************************************** * * The functions below are used the create the page table mappings for @@ -3263,6 +3275,7 @@ const struct iommu_ops amd_iommu_ops = { .flush_iotlb_all = amd_iommu_flush_iotlb_all, .iotlb_range_add = amd_iommu_iotlb_range_add, .iotlb_sync = amd_iommu_flush_iotlb_all, + .flush_np_cache = amd_iommu_flush_np_cache, }; /*****************************************************************************