From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: ashok.raj@intel.com, jacob.jun.pan@intel.com,
kevin.tian@intel.com, iommu@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH 2/2] iommu/vt-d: Unnecessary to handle default identity domain
Date: Fri, 10 Jan 2020 14:10:58 +0800 [thread overview]
Message-ID: <20200110061058.26958-2-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20200110061058.26958-1-baolu.lu@linux.intel.com>
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>
---
drivers/iommu/intel-iommu.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 6aeaad2cf8a9..e7942bc05e4e 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -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
@@ -5017,7 +5012,7 @@ 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;
--
2.17.1
prev parent reply other threads:[~2020-01-10 6:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 6:10 [PATCH 1/2] iommu/vt-d: Allow devices with RMRRs to use identity domain Lu Baolu
2020-01-10 6:10 ` Lu Baolu [this message]
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