3.16.74-rc1 review patch. If anyone has any objections, please let me know.
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From: Lu Baolu baolu.lu@linux.intel.com
commit cf1ec4539a50bdfe688caad4615ca47646884316 upstream.
The intel_iommu_gfx_mapped flag is exported by the Intel IOMMU driver to indicate whether an IOMMU is used for the graphic device. In a virtualized IOMMU environment (e.g. QEMU), an include-all IOMMU is used for graphic device. This flag is found to be clear even the IOMMU is used.
Cc: Ashok Raj ashok.raj@intel.com Cc: Jacob Pan jacob.jun.pan@linux.intel.com Cc: Kevin Tian kevin.tian@intel.com Reported-by: Zhenyu Wang zhenyuw@linux.intel.com Fixes: c0771df8d5297 ("intel-iommu: Export a flag indicating that the IOMMU is used for iGFX.") Suggested-by: Kevin Tian kevin.tian@intel.com Signed-off-by: Lu Baolu baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/iommu/intel-iommu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3578,9 +3578,7 @@ static void __init init_no_remapping_dev
/* This IOMMU has *only* gfx devices. Either bypass it or set the gfx_mapped flag, as appropriate */ - if (dmar_map_gfx) { - intel_iommu_gfx_mapped = 1; - } else { + if (!dmar_map_gfx) { drhd->ignored = 1; for_each_active_dev_scope(drhd->devices, drhd->devices_cnt, i, dev) @@ -4074,6 +4072,9 @@ int __init intel_iommu_init(void) goto out_free_reserved_range; }
+ if (dmar_map_gfx) + intel_iommu_gfx_mapped = 1; + init_no_remapping_devices();
ret = init_dmars();