From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Thu, 2 May 2019 09:34:25 +0800
Subject: iommu/vt-d: Set intel_iommu_gfx_mapped correctly
Git-commit: cf1ec4539a50bdfe688caad4615ca47646884316
References: bsc#1135008
Patch-mainline: v5.2-rc1
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>
---
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
@@ -4131,9 +4131,7 @@ 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)
@@ -4933,6 +4931,9 @@ 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();