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authorLu Baolu <baolu.lu@linux.intel.com>2019-05-02 04:34:25 +0300
committerJoerg Roedel <jroedel@suse.de>2019-05-03 18:31:32 +0300
commitcf1ec4539a50bdfe688caad4615ca47646884316 (patch)
tree405dc1e48cfd537083692f94bf6566b86b08d2a6 /drivers/iommu
parent095303e0eb566e408435ef1cfa25aef2af2e403e (diff)
downloadlinux-cf1ec4539a50bdfe688caad4615ca47646884316.tar.xz
iommu/vt-d: Set intel_iommu_gfx_mapped correctly
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>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index de47bdb57e48..a814c95f73ce 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4053,9 +4053,7 @@ 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)
@@ -4894,6 +4892,9 @@ 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();