linux-stable.git/include/linux/intel-iommu.h, branch v4.4.166

iommu/vt-d: Fix dev iotlb pfsid use

2018-09-09T18:04:35+00:00

commit 1c48db44924298ad0cb5a6386b88017539be8822 upstream.

PFSID should be used in the invalidation descriptor for flushing
device IOTLBs on SRIOV VFs.

Signed-off-by: Jacob Pan 
Cc: stable@vger.kernel.org
Cc: "Ashok Raj" 
Cc: "Lu Baolu" 
Signed-off-by: Joerg Roedel 
Signed-off-by: Greg Kroah-Hartman

iommu/vt-d: Add definitions for PFSID

2018-09-09T18:04:35+00:00

commit 0f725561e168485eff7277d683405c05b192f537 upstream.

When SRIOV VF device IOTLB is invalidated, we need to provide
the PF source ID such that IOMMU hardware can gauge the depth
of invalidation queue which is shared among VFs. This is needed
when device invalidation throttle (DIT) capability is supported.

This patch adds bit definitions for checking and tracking PFSID.

Signed-off-by: Jacob Pan 
Cc: stable@vger.kernel.org
Cc: "Ashok Raj" 
Cc: "Lu Baolu" 
Signed-off-by: Joerg Roedel 
Signed-off-by: Greg Kroah-Hartman

iommu/vt-d: Fix some macros that are incorrectly specified in intel-iommu

2017-03-12T05:37:25+00:00

commit aaa59306b0b7e0ca4ba92cc04c5db101cbb1c096 upstream.

Some of the macros are incorrect with wrong bit-shifts resulting in picking
the incorrect invalidation granularity. Incorrect Source-ID in extended
devtlb invalidation caused device side errors.

To: Joerg Roedel 
To: David Woodhouse 
Cc: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Cc: CQ Tang 
Cc: Ashok Raj 

Fixes: 2f26e0a9 ("iommu/vt-d: Add basic SVM PASID support")
Signed-off-by: CQ Tang 
Signed-off-by: Ashok Raj 
Tested-by: CQ Tang 
Signed-off-by: Joerg Roedel 
Signed-off-by: Greg Kroah-Hartman

iommu/vt-d: Fix PASID table allocation

2016-12-02T08:09:00+00:00

commit 910170442944e1f8674fd5ddbeeb8ccd1877ea98 upstream.

Somehow I ended up with an off-by-three error in calculating the size of
the PASID and PASID State tables, which triggers allocations failures as
those tables unfortunately have to be physically contiguous.

In fact, even the *correct* maximum size of 8MiB is problematic and is
wont to lead to allocation failures. Since I have extracted a promise
that this *will* be fixed in hardware, I'm happy to limit it on the
current hardware to a maximum of 0x20000 PASIDs, which gives us 1MiB
tables — still not ideal, but better than before.

Reported by Mika Kuoppala  and also by
Xunlei Pang  who submitted a simpler patch to fix
only the allocation (and not the free) to the "correct" limit... which
was still problematic.

Signed-off-by: David Woodhouse 
Signed-off-by: Greg Kroah-Hartman

iommu/vt-d: Clear PPR bit to ensure we get more page request interrupts

2016-02-25T20:01:22+00:00

commit 46924008273ed03bd11dbb32136e3da4cfe056e1 upstream.

According to the VT-d specification we need to clear the PPR bit in
the Page Request Status register when handling page requests, or the
hardware won't generate any more interrupts.

This wasn't actually necessary on SKL/KBL (which may well be the
subject of a hardware erratum, although it's harmless enough). But
other implementations do appear to get it right, and we only ever get
one interrupt unless we clear the PPR bit.

Reported-by: CQ Tang 
Signed-off-by: David Woodhouse 
Signed-off-by: Greg Kroah-Hartman

iommu/vt-d: Implement SVM_FLAG_PRIVATE_PASID to allocate unique PASIDs

2015-10-15T14:35:32+00:00

Signed-off-by: David Woodhouse

iommu/vt-d: Add callback to device driver on page faults

2015-10-15T14:35:28+00:00

Signed-off-by: David Woodhouse

iommu/vt-d: Implement page request handling

2015-10-15T14:35:19+00:00

Largely based on the driver-mode implementation by Jesse Barnes.

Signed-off-by: David Woodhouse

iommu/vt-d: Generalise DMAR MSI setup to allow for page request events

2015-10-15T12:22:41+00:00

Signed-off-by: David Woodhouse

iommu/vt-d: Add basic SVM PASID support

2015-10-15T11:55:45+00:00

This provides basic PASID support for endpoint devices, tested with a
version of the i915 driver.

Signed-off-by: David Woodhouse