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Commit 60f723b4 authored Apr 05, 2011 by Joerg Roedel

x86/amd-iommu: Add flag to indicate IOTLB support



This patch adds a flag to the AMD IOMMU driver to indicate
that all IOMMUs present in the system support device IOTLBs.

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

parent cb41ed85

arch/x86/include/asm/amd_iommu_types.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -250,6 +250,8 @@ extern bool amd_iommu_dump;

		/* global flag if IOMMUs cache non-present entries */
		extern bool amd_iommu_np_cache;
		/* Only true if all IOMMUs support device IOTLBs */
		extern bool amd_iommu_iotlb_sup;

		/*
		* Make iterating over all IOMMUs easier

arch/x86/kernel/amd_iommu_init.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -137,6 +137,7 @@ int amd_iommus_present;

		/* IOMMUs have a non-present cache? */
		bool amd_iommu_np_cache __read_mostly;
		bool amd_iommu_iotlb_sup __read_mostly = true;

		/*
		* The ACPI table parsing functions set this variable on an error
		@@ -673,6 +674,9 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu)
		MMIO_GET_LD(range));
		iommu->evt_msi_num = MMIO_MSI_NUM(misc);

		if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB)))
		amd_iommu_iotlb_sup = false;

		if (!is_rd890_iommu(iommu->dev))
		return;