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iommu/vt-d: Set intel_iommu_gfx_mapped correctly

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[ Upstream commit cf1ec4539a50bdfe688caad4615ca47646884316 ]

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: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lu Baolu 2019-05-02 09:34:25 +08:00 committed by Greg Kroah-Hartman
parent 9e4ed17b94
commit 09ad374f23
1 changed files with 4 additions and 3 deletions
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7
drivers/iommu/intel-iommu.c
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@ -3983,9 +3983,7 @@ static void __init init_no_remapping_devices(void)
/* 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)
@ -4694,6 +4692,9 @@ 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();