iommu/vt-d: Use iova over first level (b802d070) · Commits · 戴 / test

After we make all map/unmap paths support first level page table. Let's turn it on if hardware supports scalable mode. Signed-off-by:

drivers/iommu/intel-iommu.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -1770,15 +1770,13 @@ static void free_dmar_iommu(struct intel_iommu *iommu)

		/*
		* Check and return whether first level is used by default for
		* DMA translation. Currently, we make it off by setting
		* first_level_support = 0, and will change it to -1 after all
		* map/unmap paths support first level page table.
		* DMA translation.
		*/
		static bool first_level_by_default(void)
		{
		struct dmar_drhd_unit *drhd;
		struct intel_iommu *iommu;
		static int first_level_support = 0;
		static int first_level_support = -1;

		if (likely(first_level_support != -1))
		return first_level_support;