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iommu/vt-d: Unnecessary to handle default identity domain

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The iommu default domain framework has been designed to take
care of setting identity default domain type. It's unnecessary
to handle this again in the VT-d driver. Hence, remove it.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2020-01-15 11:03:59 +08:00 committed by Joerg Roedel
parent 9235cb13d7
commit b89b6605b8
1 changed files with 2 additions and 7 deletions
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9
drivers/iommu/intel-iommu.c
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@ -387,7 +387,6 @@ static int intel_iommu_superpage = 1;
static int iommu_identity_mapping;
static int intel_no_bounce;
#define IDENTMAP_ALL 1
#define IDENTMAP_GFX 2
#define IDENTMAP_AZALIA 4
@ -3079,8 +3078,7 @@ static int device_def_domain_type(struct device *dev)
return IOMMU_DOMAIN_DMA;
}
return (iommu_identity_mapping & IDENTMAP_ALL) ?
IOMMU_DOMAIN_IDENTITY : 0;
return 0;
}
static void intel_iommu_init_qi(struct intel_iommu *iommu)
@ -3424,9 +3422,6 @@ static int __init init_dmars(void)
iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);
}
if (iommu_default_passthrough())
iommu_identity_mapping |= IDENTMAP_ALL;
#ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA
dmar_map_gfx = 0;
#endif
@ -5038,7 +5033,7 @@ static int __init platform_optin_force_iommu(void)
* map for all devices except those marked as being untrusted.
*/
if (dmar_disabled)
iommu_identity_mapping |= IDENTMAP_ALL;
iommu_set_default_passthrough(false);
dmar_disabled = 0;
no_iommu = 0;