user/sven/linux.git/include/linux/dmar.h, branch v5.3.2

include/linux/dmar.h: replace single-char identifiers in macros

2019-07-12T18:05:41Z

There are a few macros in IOMMU have single-char identifiers make the code hard to read and debug. Replace them with meaningful names. Link: http://lkml.kernel.org/r/1559566783-13627-1-git-send-email-cai@lca.pw Signed-off-by: Qian Cai Suggested-by: Andrew Morton Cc: Joerg Roedel Cc: Robin Murphy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320

2019-06-05T15:37:05Z

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 usa extracted 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

iommu/vt-d: Force IOMMU on for platform opt in hint

2018-12-05T09:01:55Z

Intel VT-d spec added a new DMA_CTRL_PLATFORM_OPT_IN_FLAG flag in DMAR ACPI table [1] for BIOS to report compliance about platform initiated DMA restricted to RMRR ranges when transferring control to the OS. This means that during OS boot, before it enables IOMMU none of the connected devices can bypass DMA protection for instance by overwriting the data structures used by the IOMMU. The OS also treats this as a hint that the IOMMU should be enabled to prevent DMA attacks from possible malicious devices. A use of this flag is Kernel DMA protection for Thunderbolt [2] which in practice means that IOMMU should be enabled for PCIe devices connected to the Thunderbolt ports. With IOMMU enabled for these devices, all DMA operations are limited in the range reserved for it, thus the DMA attacks are prevented. All these devices are enumerated in the PCI/PCIe module and marked with an untrusted flag. This forces IOMMU to be enabled if DMA_CTRL_PLATFORM_OPT_IN_FLAG is set in DMAR ACPI table and there are PCIe devices marked as untrusted in the system. This can be turned off by adding "intel_iommu=off" in the kernel command line, if any problems are found. [1] https://software.intel.com/sites/default/files/managed/c5/15/vt-directed-io-spec.pdf [2] https://docs.microsoft.com/en-us/windows/security/information-protection/kernel-dma-protection-for-thunderbolt Cc: Jacob Pan Cc: Sohil Mehta Signed-off-by: Lu Baolu Signed-off-by: Mika Westerberg Reviewed-by: Ashok Raj Reviewed-by: Joerg Roedel Acked-by: Joerg Roedel

x86: irq_remapping: Move irq remapping mode enum

2018-07-06T12:43:47Z

The enum is currently defined in Intel-specific DMAR header file, but it is also used by APIC common code. Therefore, move it to a more appropriate interrupt-remapping common header file. This will also be used by subsequent patches. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Joerg Roedel Signed-off-by: Suravee Suthikulpanit Signed-off-by: Joerg Roedel

iommu/vt-d: Don't register bus-notifier under dmar_global_lock

2017-10-06T13:09:30Z

The notifier function will take the dmar_global_lock too, so lockdep complains about inverse locking order when the notifier is registered under the dmar_global_lock. Reported-by: Jan Kiszka Fixes: 59ce0515cdaf ('iommu/vt-d: Update DRHD/RMRR/ATSR device scope caches when PCI hotplug happens') Signed-off-by: Joerg Roedel

sched/headers: Prepare to use instead of in

2017-03-02T07:42:38Z

We don't actually need the full rculist.h header in sched.h anymore, we will be able to include the smaller rcupdate.h header instead. But first update code that relied on the implicit header inclusion. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

iommu: dmar: Provide helper to copy shared irte fields

2015-06-12T09:33:52Z

Instead of open coding, provide a helper function to copy the shared irte fields. Signed-off-by: Thomas Gleixner Cc: jiang.liu@linux.intel.com Cc: iommu@lists.linux-foundation.org Cc: joro@8bytes.org Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/1433827237-3382-4-git-send-email-feng.wu@intel.com Signed-off-by: Thomas Gleixner

iommu: dmar: Extend struct irte for VT-d Posted-Interrupts

2015-06-12T09:33:51Z

The IRTE (Interrupt Remapping Table Entry) is either an entry for remapped or for posted interrupts. The hardware distiguishes between remapped and posted entries by bit 15 in the low 64 bit of the IRTE. If cleared the entry is remapped, if set it's posted. The entries have common fields and dependent on the posted bit fields with different meanings. Extend struct irte to handle the differences between remap and posted mode by having three structs in the unions: - Shared - Remapped - Posted Signed-off-by: Thomas Gleixner Signed-off-by: Feng Wu Acked-by: Joerg Roedel Cc: jiang.liu@linux.intel.com Cc: iommu@lists.linux-foundation.org Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/1433827237-3382-3-git-send-email-feng.wu@intel.com Signed-off-by: Thomas Gleixner

iommu/vt-d: Refine the interfaces to create IRQ for DMAR unit

2015-04-24T13:36:49Z

Refine the interfaces to create IRQ for DMAR unit. It's a preparation for converting DMAR IRQ to hierarchical irqdomain on x86. It also moves dmar_alloc_hwirq()/dmar_free_hwirq() from irq_remapping.h to dmar.h. They are not irq_remapping specific. Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: David Cohen Cc: Sander Eikelenboom Cc: David Vrabel Cc: Greg Kroah-Hartman Cc: iommu@lists.linux-foundation.org Cc: Vinod Koul Cc: Bjorn Helgaas Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Cc: Dimitri Sivanich Cc: Tony Luck Cc: Fenghua Yu Cc: Joerg Roedel Link: http://lkml.kernel.org/r/1428905519-23704-20-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner

iommu/vt-d: Implement DMAR unit hotplug framework

2014-11-18T10:18:35Z

On Intel platforms, an IO Hub (PCI/PCIe host bridge) may contain DMAR units, so we need to support DMAR hotplug when supporting PCI host bridge hotplug on Intel platforms. According to Section 8.8 "Remapping Hardware Unit Hot Plug" in "Intel Virtualization Technology for Directed IO Architecture Specification Rev 2.2", ACPI BIOS should implement ACPI _DSM method under the ACPI object for the PCI host bridge to support DMAR hotplug. This patch introduces interfaces to parse ACPI _DSM method for DMAR unit hotplug. It also implements state machines for DMAR unit hot-addition and hot-removal. The PCI host bridge hotplug driver should call dmar_hotplug_hotplug() before scanning PCI devices connected for hot-addition and after destroying all PCI devices for hot-removal. Signed-off-by: Jiang Liu Reviewed-by: Yijing Wang Signed-off-by: Joerg Roedel