19 Jun, 2019
2 commits
-
Based on 2 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundationthis program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 4122 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Enrico Weigelt
Reviewed-by: Kate Stewart
Reviewed-by: Allison Randal
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not see http www gnu org
licensesextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 503 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Alexios Zavras
Reviewed-by: Allison Randal
Reviewed-by: Enrico Weigelt
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de
Signed-off-by: Greg Kroah-Hartman
14 Jun, 2019
1 commit
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Pull iommu fixes from Joerg Roedel:
- three fixes for Intel VT-d to fix a potential dead-lock, a formatting
fix and a bit setting fix- one fix for the ARM-SMMU to make it work on some platforms with
sub-optimal SMMU emulation* tag 'iommu-fixes-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/arm-smmu: Avoid constant zero in TLBI writes
iommu/vt-d: Set the right field for Page Walk Snoop
iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock
iommu: Add missing new line for dma type
12 Jun, 2019
1 commit
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Apparently, some Qualcomm arm64 platforms which appear to expose their
SMMU global register space are still, in fact, using a hypervisor to
mediate it by trapping and emulating register accesses. Sadly, some
deployed versions of said trapping code have bugs wherein they go
horribly wrong for stores using r31 (i.e. XZR/WZR) as the source
register.While this can be mitigated for GCC today by tweaking the constraints
for the implementation of writel_relaxed(), to avoid any potential
arms race with future compilers more aggressively optimising register
allocation, the simple way is to just remove all the problematic
constant zeros. For the write-only TLB operations, the actual value is
irrelevant anyway and any old nearby variable will provide a suitable
GPR to encode. The one point at which we really do need a zero to clear
a context bank happens before any of the TLB maintenance where crashes
have been reported, so is apparently not a problem... :/Reported-by: AngeloGioacchino Del Regno
Tested-by: Marc Gonzalez
Signed-off-by: Robin Murphy
Signed-off-by: Marc Gonzalez
Acked-by: Will Deacon
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel
05 Jun, 2019
6 commits
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not write to the free
software foundation inc 51 franklin st fifth floor boston ma 02110
1301 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 111 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Alexios Zavras
Reviewed-by: Allison Randal
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.567572064@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not write to the free
software foundation inc 59 temple place suite 330 boston ma 02111
1307 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 136 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Alexios Zavras
Reviewed-by: Allison Randal
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not write to the free
software foundation inc 59 temple place suite 330 boston ma 02111
1307 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 33 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Kate Stewart
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.254582722@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more detailsextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 263 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 and
only version 2 as published by the free software foundation this
program is distributed in the hope that it will be useful but
without any warranty without even the implied warranty of
merchantability or fitness for a particular purpose see the gnu
general public license for more details you should have received a
copy of the gnu general public license along with this program if
not write to the free software foundation inc 51 franklin street
fifth floor boston ma 02110 1301 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 94 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Richard Fontana
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141334.043630402@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not write to the free
software foundation 51 franklin street fifth floor boston ma 02110
1301 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 67 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Richard Fontana
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141333.953658117@linutronix.de
Signed-off-by: Greg Kroah-Hartman
02 Jun, 2019
1 commit
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Commit cf04eee8bf0e ("iommu/vt-d: Include ACPI devices in iommu=pt")
added for_each_active_iommu() in iommu_prepare_static_identity_mapping()
but never used the each element, i.e, "drhd->iommu".drivers/iommu/intel-iommu.c: In function
'iommu_prepare_static_identity_mapping':
drivers/iommu/intel-iommu.c:3037:22: warning: variable 'iommu' set but
not used [-Wunused-but-set-variable]
struct intel_iommu *iommu;Fixed the warning by appending a compiler attribute __maybe_unused for it.
Link: http://lkml.kernel.org/r/20190523013314.2732-1-cai@lca.pw
Signed-off-by: Qian Cai
Suggested-by: Andrew Morton
Cc: Joerg Roedel
Cc: David Woodhouse
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
31 May, 2019
1 commit
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more detailsextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 655 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Kate Stewart
Reviewed-by: Richard Fontana
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman
27 May, 2019
3 commits
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Set the page walk snoop to the right bit, otherwise the domain
id field will be overlapped.Reported-by: Dave Jiang
Fixes: 6f7db75e1c469 ("iommu/vt-d: Add second level page table interface")
Signed-off-by: Lu Baolu
Signed-off-by: Joerg Roedel -
Lockdep debug reported lock inversion related with the iommu code
caused by dmar_insert_one_dev_info() grabbing the iommu->lock and
the device_domain_lock out of order versus the code path in
iommu_flush_dev_iotlb(). Expanding the scope of the iommu->lock and
reversing the order of lock acquisition fixes the issue.[ 76.238180] dsa_bus wq0.0: dsa wq wq0.0 disabled
[ 76.248706]
[ 76.250486] ========================================================
[ 76.257113] WARNING: possible irq lock inversion dependency detected
[ 76.263736] 5.1.0-rc5+ #162 Not tainted
[ 76.267854] --------------------------------------------------------
[ 76.274485] systemd-journal/521 just changed the state of lock:
[ 76.280685] 0000000055b330f5 (device_domain_lock){..-.}, at: iommu_flush_dev_iotlb.part.63+0x29/0x90
[ 76.290099] but this lock took another, SOFTIRQ-unsafe lock in the past:
[ 76.297093] (&(&iommu->lock)->rlock){+.+.}
[ 76.297094]
[ 76.297094]
[ 76.297094] and interrupts could create inverse lock ordering between them.
[ 76.297094]
[ 76.314257]
[ 76.314257] other info that might help us debug this:
[ 76.321448] Possible interrupt unsafe locking scenario:
[ 76.321448]
[ 76.328907] CPU0 CPU1
[ 76.333777] ---- ----
[ 76.338642] lock(&(&iommu->lock)->rlock);
[ 76.343165] local_irq_disable();
[ 76.349422] lock(device_domain_lock);
[ 76.356116] lock(&(&iommu->lock)->rlock);
[ 76.363154]
[ 76.366134] lock(device_domain_lock);
[ 76.370548]
[ 76.370548] *** DEADLOCK ***Fixes: 745f2586e78e ("iommu/vt-d: Simplify function get_domain_for_dev()")
Signed-off-by: Dave Jiang
Reviewed-by: Lu Baolu
Signed-off-by: Joerg Roedel -
So that all types are printed in the same format.
Fixes: c52c72d3dee81 ("iommu: Add sysfs attribyte for domain type")
Signed-off-by: Lu Baolu
Signed-off-by: Joerg Roedel
21 May, 2019
2 commits
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Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:GPL-2.0-only
Signed-off-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman -
Add SPDX license identifiers to all files which:
- Have no license information of any form
- Have EXPORT_.*_SYMBOL_GPL inside which was used in the
initial scan/conversion to ignore the fileThese files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:GPL-2.0-only
Signed-off-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
20 May, 2019
1 commit
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Pull IRQ chip updates from Ingo Molnar:
"A late irqchips update:- New TI INTR/INTA set of drivers
- Rewrite of the stm32mp1-exti driver as a platform driver
- Update the IOMMU MSI mapping API to be RT friendly
- A number of cleanups and other low impact fixes"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
iommu/dma-iommu: Remove iommu_dma_map_msi_msg()
irqchip/gic-v3-mbi: Don't map the MSI page in mbi_compose_m{b, s}i_msg()
irqchip/ls-scfg-msi: Don't map the MSI page in ls_scfg_msi_compose_msg()
irqchip/gic-v3-its: Don't map the MSI page in its_irq_compose_msi_msg()
irqchip/gicv2m: Don't map the MSI page in gicv2m_compose_msi_msg()
iommu/dma-iommu: Split iommu_dma_map_msi_msg() in two parts
genirq/msi: Add a new field in msi_desc to store an IOMMU cookie
arm64: arch_k3: Enable interrupt controller drivers
irqchip/ti-sci-inta: Add msi domain support
soc: ti: Add MSI domain bus support for Interrupt Aggregator
irqchip/ti-sci-inta: Add support for Interrupt Aggregator driver
dt-bindings: irqchip: Introduce TISCI Interrupt Aggregator bindings
irqchip/ti-sci-intr: Add support for Interrupt Router driver
dt-bindings: irqchip: Introduce TISCI Interrupt router bindings
gpio: thunderx: Use the default parent apis for {request,release}_resources
genirq: Introduce irq_chip_{request,release}_resource_parent() apis
firmware: ti_sci: Add helper apis to manage resources
firmware: ti_sci: Add RM mapping table for am654
firmware: ti_sci: Add support for IRQ management
firmware: ti_sci: Add support for RM core ops
...
15 May, 2019
3 commits
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Since commit dccd2304cc90 ("ARM: 7430/1: sizes.h: move from asm-generic
to "), and are just
wrappers of .This commit replaces all and to
prepare for the removal.Link: http://lkml.kernel.org/r/1553267665-27228-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pull PCI updates from Bjorn Helgaas:
"Enumeration changes:- Add _HPX Type 3 settings support, which gives firmware more
influence over device configuration (Alexandru Gagniuc)- Support fixed bus numbers from bridge Enhanced Allocation
capabilities (Subbaraya Sundeep)- Add "external-facing" DT property to identify cases where we
require IOMMU protection against untrusted devices (Jean-Philippe
Brucker)- Enable PCIe services for host controller drivers that use managed
host bridge alloc (Jean-Philippe Brucker)- Log PCIe port service messages with pci_dev, not the pcie_device
(Frederick Lawler)- Convert pciehp from pciehp_debug module parameter to generic
dynamic debug (Frederick Lawler)Peer-to-peer DMA:
- Add whitelist of Root Complexes that support peer-to-peer DMA
between Root Ports (Christian König)Native controller drivers:
- Add PCI host bridge DMA ranges for bridges that can't DMA
everywhere, e.g., iProc (Srinath Mannam)- Add Amazon Annapurna Labs PCIe host controller driver (Jonathan
Chocron)- Fix Tegra MSI target allocation so DMA doesn't generate unwanted
MSIs (Vidya Sagar)- Fix of_node reference leaks (Wen Yang)
- Fix Hyper-V module unload & device removal issues (Dexuan Cui)
- Cleanup R-Car driver (Marek Vasut)
- Cleanup Keystone driver (Kishon Vijay Abraham I)
- Cleanup i.MX6 driver (Andrey Smirnov)
Significant bug fixes:
- Reset Lenovo ThinkPad P50 GPU so nouveau works after reboot (Lyude
Paul)- Fix Switchtec firmware update performance issue (Wesley Sheng)
- Work around Pericom switch link retraining erratum (Stefan Mätje)"
* tag 'pci-v5.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (141 commits)
MAINTAINERS: Add Karthikeyan Mitran and Hou Zhiqiang for Mobiveil PCI
PCI: pciehp: Remove pointless MY_NAME definition
PCI: pciehp: Remove pointless PCIE_MODULE_NAME definition
PCI: pciehp: Remove unused dbg/err/info/warn() wrappers
PCI: pciehp: Log messages with pci_dev, not pcie_device
PCI: pciehp: Replace pciehp_debug module param with dyndbg
PCI: pciehp: Remove pciehp_debug uses
PCI/AER: Log messages with pci_dev, not pcie_device
PCI/DPC: Log messages with pci_dev, not pcie_device
PCI/PME: Replace dev_printk(KERN_DEBUG) with dev_info()
PCI/AER: Replace dev_printk(KERN_DEBUG) with dev_info()
PCI: Replace dev_printk(KERN_DEBUG) with dev_info(), etc
PCI: Replace printk(KERN_INFO) with pr_info(), etc
PCI: Use dev_printk() when possible
PCI: Cleanup setup-bus.c comments and whitespace
PCI: imx6: Allow asynchronous probing
PCI: dwc: Save root bus for driver remove hooks
PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify code
PCI: dwc: Free MSI in dw_pcie_host_init() error path
PCI: dwc: Free MSI IRQ page in dw_pcie_free_msi()
... -
Convert to use vm_map_pages() to map range of kernel memory to user vma.
Link: http://lkml.kernel.org/r/80c3d220fc6ada73a88ce43ca049afb55a889258.1552921225.git.jrdr.linux@gmail.com
Signed-off-by: Souptick Joarder
Cc: Boris Ostrovsky
Cc: David Airlie
Cc: Heiko Stuebner
Cc: Joerg Roedel
Cc: Joonsoo Kim
Cc: Juergen Gross
Cc: Kees Cook
Cc: "Kirill A. Shutemov"
Cc: Kyungmin Park
Cc: Marek Szyprowski
Cc: Matthew Wilcox
Cc: Mauro Carvalho Chehab
Cc: Michal Hocko
Cc: Mike Rapoport
Cc: Oleksandr Andrushchenko
Cc: Pawel Osciak
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Robin Murphy
Cc: Russell King
Cc: Sandy Huang
Cc: Stefan Richter
Cc: Stephen Rothwell
Cc: Thierry Reding
Cc: Vlastimil Babka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 May, 2019
1 commit
-
- Add list of legal DMA address ranges to PCI host bridge (Srinath
Mannam)- Reserve inaccessible DMA ranges so IOMMU doesn't allocate them (Srinath
Mannam)- Parse iProc DT dma-ranges to learn what PCI devices can reach via DMA
(Srinath Mannam)* pci/iova-dma-ranges:
PCI: iproc: Add sorted dma ranges resource entries to host bridge
iommu/dma: Reserve IOVA for PCIe inaccessible DMA address
PCI: Add dma_ranges window list# Conflicts:
# drivers/pci/probe.c
13 May, 2019
1 commit
-
Pull IOMMU updates from Joerg Roedel:
- ATS support for ARM-SMMU-v3.
- AUX domain support in the IOMMU-API and the Intel VT-d driver. This
adds support for multiple DMA address spaces per (PCI-)device. The
use-case is to multiplex devices between host and KVM guests in a
more flexible way than supported by SR-IOV.- the rest are smaller cleanups and fixes, two of which needed to be
reverted after testing in linux-next.* tag 'iommu-updates-v5.2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (45 commits)
Revert "iommu/amd: Flush not present cache in iommu_map_page"
Revert "iommu/amd: Remove the leftover of bypass support"
iommu/vt-d: Fix leak in intel_pasid_alloc_table on error path
iommu/vt-d: Make kernel parameter igfx_off work with vIOMMU
iommu/vt-d: Set intel_iommu_gfx_mapped correctly
iommu/amd: Flush not present cache in iommu_map_page
iommu/vt-d: Cleanup: no spaces at the start of a line
iommu/vt-d: Don't request page request irq under dmar_global_lock
iommu/vt-d: Use struct_size() helper
iommu/mediatek: Fix leaked of_node references
iommu/amd: Remove amd_iommu_pd_list
iommu/arm-smmu: Log CBFRSYNRA register on context fault
iommu/arm-smmu-v3: Don't disable SMMU in kdump kernel
iommu/arm-smmu-v3: Disable tagged pointers
iommu/arm-smmu-v3: Add support for PCI ATS
iommu/arm-smmu-v3: Link domains and devices
iommu/arm-smmu-v3: Add a master->domain pointer
iommu/arm-smmu-v3: Store SteamIDs in master
iommu/arm-smmu-v3: Rename arm_smmu_master_data to arm_smmu_master
ACPI/IORT: Check ATS capability in root complex nodes
...
07 May, 2019
3 commits
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This reverts commit 1a1079011da32db87e19fcb39e70d082f89da921.
This commit caused a NULL-ptr deference bug and must be
reverted for now.Signed-off-by: Joerg Roedel
-
The dma_ranges list field of PCI host bridge structure has resource entries
in sorted order representing address ranges allowed for DMA transfers.Process the list and reserve IOVA addresses that are not present in its
resource entries (ie DMA memory holes) to prevent allocating IOVA addresses
that cannot be accessed by PCI devices.Based-on-a-patch-by: Oza Pawandeep
Signed-off-by: Srinath Mannam
Signed-off-by: Lorenzo Pieralisi
Signed-off-by: Bjorn Helgaas
Reviewed-by: Oza Pawandeep
Acked-by: Robin Murphy
06 May, 2019
1 commit
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This reverts commit 7a5dbf3ab2f04905cf8468c66fcdbfb643068bcb.
This commit not only removes the leftovers of bypass
support, it also mostly removes the checking of the return
value of the get_domain() function. This can lead to silent
data corruption bugs when a device is not attached to its
dma_ops domain and a DMA-API function is called for that
device.Signed-off-by: Joerg Roedel
03 May, 2019
7 commits
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If alloc_pages_node() fails, pasid_table is leaked. Free it.
Fixes: cc580e41260db ("iommu/vt-d: Per PCI device pasid table interfaces")
Signed-off-by: Eric Auger
Signed-off-by: Joerg Roedel -
The kernel parameter igfx_off is used by users to disable
DMA remapping for the Intel integrated graphic device. It
was designed for bare metal cases where a dedicated IOMMU
is used for graphic. This doesn't apply to virtual IOMMU
case where an include-all IOMMU is used. This makes the
kernel parameter work with virtual IOMMU as well.Cc: Ashok Raj
Cc: Jacob Pan
Suggested-by: Kevin Tian
Fixes: c0771df8d5297 ("intel-iommu: Export a flag indicating that the IOMMU is used for iGFX.")
Signed-off-by: Lu Baolu
Tested-by: Zhenyu Wang
Signed-off-by: Joerg Roedel -
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
Cc: Jacob Pan
Cc: Kevin Tian
Reported-by: Zhenyu Wang
Fixes: c0771df8d5297 ("intel-iommu: Export a flag indicating that the IOMMU is used for iGFX.")
Suggested-by: Kevin Tian
Signed-off-by: Lu Baolu
Signed-off-by: Joerg Roedel -
check if there is a not-present cache present and flush it if there is.
Signed-off-by: Tom Murphy
Signed-off-by: Joerg Roedel -
Replace the whitespaces at the start of a line with tabs. No
functional changes.Signed-off-by: Lu Baolu
Signed-off-by: Joerg Roedel -
A recent change split iommu_dma_map_msi_msg() in two new functions. The
function was still implemented to avoid modifying all the callers at
once.Now that all the callers have been reworked, iommu_dma_map_msi_msg() can
be removed.Signed-off-by: Julien Grall
Reviewed-by: Robin Murphy
Reviewed-by: Eric Auger
Acked-by: Joerg Roedel
Signed-off-by: Marc Zyngier -
On RT, iommu_dma_map_msi_msg() may be called from non-preemptible
context. This will lead to a splat with CONFIG_DEBUG_ATOMIC_SLEEP as
the function is using spin_lock (they can sleep on RT).iommu_dma_map_msi_msg() is used to map the MSI page in the IOMMU PT
and update the MSI message with the IOVA.Only the part to lookup for the MSI page requires to be called in
preemptible context. As the MSI page cannot change over the lifecycle
of the MSI interrupt, the lookup can be cached and re-used later on.iomma_dma_map_msi_msg() is now split in two functions:
- iommu_dma_prepare_msi(): This function will prepare the mapping
in the IOMMU and store the cookie in the structure msi_desc. This
function should be called in preemptible context.
- iommu_dma_compose_msi_msg(): This function will update the MSI
message with the IOVA when the device is behind an IOMMU.Signed-off-by: Julien Grall
Reviewed-by: Robin Murphy
Reviewed-by: Eric Auger
Acked-by: Joerg Roedel
Signed-off-by: Marc Zyngier
30 Apr, 2019
2 commits
-
Use new helper pci_dev_id() to simplify the code.
Signed-off-by: Heiner Kallweit
Signed-off-by: Bjorn Helgaas
Reviewed-by: Joerg Roedel -
Use new helper pci_dev_id() to simplify the code.
Signed-off-by: Heiner Kallweit
Signed-off-by: Bjorn Helgaas
Reviewed-by: Joerg Roedel
26 Apr, 2019
4 commits
-
Requesting page reqest irq under dmar_global_lock could cause
potential lock race condition (caught by lockdep).[ 4.100055] ======================================================
[ 4.100063] WARNING: possible circular locking dependency detected
[ 4.100072] 5.1.0-rc4+ #2169 Not tainted
[ 4.100078] ------------------------------------------------------
[ 4.100086] swapper/0/1 is trying to acquire lock:
[ 4.100094] 000000007dcbe3c3 (dmar_lock){+.+.}, at: dmar_alloc_hwirq+0x35/0x140
[ 4.100112] but task is already holding lock:
[ 4.100120] 0000000060bbe946 (dmar_global_lock){++++}, at: intel_iommu_init+0x191/0x1438
[ 4.100136] which lock already depends on the new lock.
[ 4.100146] the existing dependency chain (in reverse order) is:
[ 4.100155]
-> #2 (dmar_global_lock){++++}:
[ 4.100169] down_read+0x44/0xa0
[ 4.100178] intel_irq_remapping_alloc+0xb2/0x7b0
[ 4.100186] mp_irqdomain_alloc+0x9e/0x2e0
[ 4.100195] __irq_domain_alloc_irqs+0x131/0x330
[ 4.100203] alloc_isa_irq_from_domain.isra.4+0x9a/0xd0
[ 4.100212] mp_map_pin_to_irq+0x244/0x310
[ 4.100221] setup_IO_APIC+0x757/0x7ed
[ 4.100229] x86_late_time_init+0x17/0x1c
[ 4.100238] start_kernel+0x425/0x4e3
[ 4.100247] secondary_startup_64+0xa4/0xb0
[ 4.100254]
-> #1 (irq_domain_mutex){+.+.}:
[ 4.100265] __mutex_lock+0x7f/0x9d0
[ 4.100273] __irq_domain_add+0x195/0x2b0
[ 4.100280] irq_domain_create_hierarchy+0x3d/0x40
[ 4.100289] msi_create_irq_domain+0x32/0x110
[ 4.100297] dmar_alloc_hwirq+0x111/0x140
[ 4.100305] dmar_set_interrupt.part.14+0x1a/0x70
[ 4.100314] enable_drhd_fault_handling+0x2c/0x6c
[ 4.100323] apic_bsp_setup+0x75/0x7a
[ 4.100330] x86_late_time_init+0x17/0x1c
[ 4.100338] start_kernel+0x425/0x4e3
[ 4.100346] secondary_startup_64+0xa4/0xb0
[ 4.100352]
-> #0 (dmar_lock){+.+.}:
[ 4.100364] lock_acquire+0xb4/0x1c0
[ 4.100372] __mutex_lock+0x7f/0x9d0
[ 4.100379] dmar_alloc_hwirq+0x35/0x140
[ 4.100389] intel_svm_enable_prq+0x61/0x180
[ 4.100397] intel_iommu_init+0x1128/0x1438
[ 4.100406] pci_iommu_init+0x16/0x3f
[ 4.100414] do_one_initcall+0x5d/0x2be
[ 4.100422] kernel_init_freeable+0x1f0/0x27c
[ 4.100431] kernel_init+0xa/0x110
[ 4.100438] ret_from_fork+0x3a/0x50
[ 4.100444]
other info that might help us debug this:[ 4.100454] Chain exists of:
dmar_lock --> irq_domain_mutex --> dmar_global_lock
[ 4.100469] Possible unsafe locking scenario:[ 4.100476] CPU0 CPU1
[ 4.100483] ---- ----
[ 4.100488] lock(dmar_global_lock);
[ 4.100495] lock(irq_domain_mutex);
[ 4.100503] lock(dmar_global_lock);
[ 4.100512] lock(dmar_lock);
[ 4.100518]
*** DEADLOCK ***Cc: Ashok Raj
Cc: Jacob Pan
Cc: Kevin Tian
Reported-by: Dave Jiang
Fixes: a222a7f0bb6c9 ("iommu/vt-d: Implement page request handling")
Signed-off-by: Lu Baolu
Signed-off-by: Joerg Roedel -
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.So, replace code of the following form:
size = sizeof(*info) + level * sizeof(info->path[0]);
with:
size = struct_size(info, path, level);
Signed-off-by: Gustavo A. R. Silva
Signed-off-by: Joerg Roedel -
…kernel/git/will/linux into arm/smmu
