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a7050fbde3
linux/drivers/iommu/intel
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Jacob Pan a7050fbde3 iommu/vt-d: Use non-privileged mode for all PASIDs 
Supervisor Request Enable (SRE) bit in a PASID entry is for permission
checking on DMA requests. When SRE = 0, DMA with supervisor privilege
will be blocked. However, for in-kernel DMA this is not necessary in that
we are targeting kernel memory anyway. There's no need to differentiate
user and kernel for in-kernel DMA.

Let's use non-privileged (user) permission for all PASIDs used in kernel,
it will be consistent with DMA without PASID (RID_PASID) as well.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Link: https://lore.kernel.org/r/20230331231137.1947675-2-jacob.jun.pan@linux.intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2023-04-13 12:05:49 +02:00
..
cap_audit.c iommu/vt-d: Rename cap_5lp_support to cap_fl5lp_support 2022-09-26 15:52:25 +02:00
cap_audit.h iommu/vt-d: Check FL and SL capability sanity in scalable mode 2021-10-18 12:31:48 +02:00
debugfs.c iommu/vt-d: Replace spin_lock_irqsave() with spin_lock() 2022-07-15 10:21:36 +02:00
dmar.c iommu/vt-d: Enable IOMMU perfmon support 2023-02-03 11:06:09 +01:00
iommu.c iommu/vt-d: Use non-privileged mode for all PASIDs 2023-04-13 12:05:49 +02:00
iommu.h iommu/vt-d: Remove extern from function prototypes 2023-04-13 12:05:49 +02:00
irq_remapping.c iommu/vt-d: Do not use GFP_ATOMIC when not needed 2023-04-13 12:05:48 +02:00
Kconfig iommu/vt-d: Retrieve IOMMU perfmon capability information 2023-02-03 11:06:04 +01:00
Makefile iommu/vt-d: Retrieve IOMMU perfmon capability information 2023-02-03 11:06:04 +01:00
pasid.c Merge branches 'apple/dart', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next 2023-02-18 15:43:04 +01:00
pasid.h iommu/vt-d: Remove clearing translation data in disable_dmar_iommu() 2022-07-15 10:21:34 +02:00
perf.c iommu/vt-d: Move include/linux/intel-iommu.h under iommu 2022-07-15 10:21:31 +02:00
perf.h iommu/vt-d: Add common code for dmar latency performance monitors 2021-06-10 09:06:13 +02:00
perfmon.c iommu/vt-d: Add IOMMU perfmon overflow handler support 2023-02-03 11:06:08 +01:00
perfmon.h iommu/vt-d: Add IOMMU perfmon support 2023-02-03 11:06:06 +01:00
svm.c iommu/vt-d: Add IOMMU perfmon overflow handler support 2023-02-03 11:06:08 +01:00
trace.c iommu/vt-d: Move trace/events/intel_iommu.h under iommu 2022-07-15 10:21:28 +02:00
trace.h iommu/vt-d: Move include/linux/intel-iommu.h under iommu 2022-07-15 10:21:31 +02:00