Merge branches 'iommu/fixes', 'arm/rockchip', 'arm/smmu', 'x86/vt-d',...

					  allowed anymore to lift isolation

					  requirements as needed. This option

					  does not override iommu=pt

			force_enable - Force enable the IOMMU on platforms known

				       to be buggy with IOMMU enabled. Use this

				       option with care.

	amd_iommu_dump=	[HW,X86-64]

			Enable AMD IOMMU driver option to dump the ACPI table

			  forcing Dual Address Cycle for PCI cards supporting

			  greater than 32-bit addressing.

	iommu.strict=	[ARM64] Configure TLB invalidation behaviour

	iommu.strict=	[ARM64, X86] Configure TLB invalidation behaviour

			Format: { "0" | "1" }

			0 - Lazy mode.

			  Request that DMA unmap operations use deferred

			1 - Strict mode (default).

			  DMA unmap operations invalidate IOMMU hardware TLBs

			  synchronously.

			Note: on x86, the default behaviour depends on the

			equivalent driver-specific parameters, but a strict

			mode explicitly specified by either method takes

			precedence.

	iommu.passthrough=

			[ARM64, X86] Configure DMA to bypass the IOMMU by default.

  tagging DMA transactions with an address space identifier. By default,

  this is 0, which means that the device only has one address space.

- dma-can-stall: When present, the master can wait for a transaction to

  complete for an indefinite amount of time. Upon translation fault some

  IOMMUs, instead of aborting the translation immediately, may first

  notify the driver and keep the transaction in flight. This allows the OS

  to inspect the fault and, for example, make physical pages resident

  before updating the mappings and completing the transaction. Such IOMMU

  accepts a limited number of simultaneous stalled transactions before

  having to either put back-pressure on the master, or abort new faulting

  transactions.

  Firmware has to opt-in stalling, because most buses and masters don't

  support it. In particular it isn't compatible with PCI, where

  transactions have to complete before a time limit. More generally it

  won't work in systems and masters that haven't been designed for

  stalling. For example the OS, in order to handle a stalled transaction,

  may attempt to retrieve pages from secondary storage in a stalled

  domain, leading to a deadlock.

Notes:

======

Rockchip IOMMU

==============

A Rockchip DRM iommu translates io virtual addresses to physical addresses for

its master device.  Each slave device is bound to a single master device, and

shares its clocks, power domain and irq.

Required properties:

- compatible      : Should be "rockchip,iommu"

- reg             : Address space for the configuration registers

- interrupts      : Interrupt specifier for the IOMMU instance

- interrupt-names : Interrupt name for the IOMMU instance

- #iommu-cells    : Should be <0>.  This indicates the iommu is a

                    "single-master" device, and needs no additional information

                    to associate with its master device.  See:

                    Documentation/devicetree/bindings/iommu/iommu.txt

- clocks          : A list of clocks required for the IOMMU to be accessible by

                    the host CPU.

- clock-names     : Should contain the following:

	"iface" - Main peripheral bus clock (PCLK/HCL) (required)

	"aclk"  - AXI bus clock (required)

Optional properties:

- rockchip,disable-mmu-reset : Don't use the mmu reset operation.

			       Some mmu instances may produce unexpected results

			       when the reset operation is used.

Example:

	vopl_mmu: iommu@ff940300 {

		compatible = "rockchip,iommu";

		reg = <0xff940300 0x100>;

		interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;

		interrupt-names = "vopl_mmu";

		clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;

		clock-names = "aclk", "iface";

		#iommu-cells = <0>;

	};

# SPDX-License-Identifier: GPL-2.0-only

%YAML 1.2

---

$id: http://devicetree.org/schemas/iommu/rockchip,iommu.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Rockchip IOMMU

maintainers:

  - Heiko Stuebner <heiko@sntech.de>

description: |+

  A Rockchip DRM iommu translates io virtual addresses to physical addresses for

  its master device. Each slave device is bound to a single master device and

  shares its clocks, power domain and irq.

  For information on assigning IOMMU controller to its peripheral devices,

  see generic IOMMU bindings.

properties:

  compatible:

    enum:

      - rockchip,iommu

      - rockchip,rk3568-iommu

  reg:

    items:

      - description: configuration registers for MMU instance 0

      - description: configuration registers for MMU instance 1

    minItems: 1

    maxItems: 2

  interrupts:

    items:

      - description: interruption for MMU instance 0

      - description: interruption for MMU instance 1

    minItems: 1

    maxItems: 2

  clocks:

    items:

      - description: Core clock

      - description: Interface clock

  clock-names:

    items:

      - const: aclk

      - const: iface

  "#iommu-cells":

    const: 0

  power-domains:

    maxItems: 1

  rockchip,disable-mmu-reset:

    $ref: /schemas/types.yaml#/definitions/flag

    description: |

      Do not use the mmu reset operation.

      Some mmu instances may produce unexpected results

      when the reset operation is used.

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

  - "#iommu-cells"

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/rk3399-cru.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    vopl_mmu: iommu@ff940300 {

      compatible = "rockchip,iommu";

      reg = <0xff940300 0x100>;

      interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;

      clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;

      clock-names = "aclk", "iface";

      #iommu-cells = <0>;

    };

B:	https://bugzilla.kernel.org

F:	drivers/acpi/acpi_video.c

ACPI VIOT DRIVER

M:	Jean-Philippe Brucker <jean-philippe@linaro.org>

L:	linux-acpi@vger.kernel.org

L:	iommu@lists.linux-foundation.org

S:	Maintained

F:	drivers/acpi/viot.c

F:	include/linux/acpi_viot.h

ACPI WMI DRIVER

L:	platform-driver-x86@vger.kernel.org

S:	Orphan