Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

8 files changed, 451 insertions, 0 deletions

diff --git a/kernel/Documentation/devicetree/bindings/iommu/arm,smmu.txt b/kernel/Documentation/devicetree/bindings/iommu/arm,smmu.txt
new file mode 100644
index 000000000..06760503a
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/arm,smmu.txt
@@ -0,0 +1,71 @@
+* ARM System MMU Architecture Implementation
+
+ARM SoCs may contain an implementation of the ARM System Memory
+Management Unit Architecture, which can be used to provide 1 or 2 stages
+of address translation to bus masters external to the CPU.
+
+The SMMU may also raise interrupts in response to various fault
+conditions.
+
+** System MMU required properties:
+
+- compatible    : Should be one of:
+
+                        "arm,smmu-v1"
+                        "arm,smmu-v2"
+                        "arm,mmu-400"
+                        "arm,mmu-401"
+                        "arm,mmu-500"
+
+                  depending on the particular implementation and/or the
+                  version of the architecture implemented.
+
+- reg           : Base address and size of the SMMU.
+
+- #global-interrupts : The number of global interrupts exposed by the
+                       device.
+
+- interrupts    : Interrupt list, with the first #global-irqs entries
+                  corresponding to the global interrupts and any
+                  following entries corresponding to context interrupts,
+                  specified in order of their indexing by the SMMU.
+
+                  For SMMUv2 implementations, there must be exactly one
+                  interrupt per context bank. In the case of a single,
+                  combined interrupt, it must be listed multiple times.
+
+- mmu-masters   : A list of phandles to device nodes representing bus
+                  masters for which the SMMU can provide a translation
+                  and their corresponding StreamIDs (see example below).
+                  Each device node linked from this list must have a
+                  "#stream-id-cells" property, indicating the number of
+                  StreamIDs associated with it.
+
+** System MMU optional properties:
+
+- calxeda,smmu-secure-config-access : Enable proper handling of buggy
+                  implementations that always use secure access to
+                  SMMU configuration registers. In this case non-secure
+                  aliases of secure registers have to be used during
+                  SMMU configuration.
+
+Example:
+
+        smmu {
+                compatible = "arm,smmu-v1";
+                reg = <0xba5e0000 0x10000>;
+                #global-interrupts = <2>;
+                interrupts = <0 32 4>,
+                             <0 33 4>,
+                             <0 34 4>, /* This is the first context interrupt */
+                             <0 35 4>,
+                             <0 36 4>,
+                             <0 37 4>;
+
+                /*
+                 * Two DMA controllers, the first with two StreamIDs (0xd01d
+                 * and 0xd01e) and the second with only one (0xd11c).
+                 */
+                mmu-masters = <&dma0 0xd01d 0xd01e>,
+                              <&dma1 0xd11c>;
+        };
diff --git a/kernel/Documentation/devicetree/bindings/iommu/iommu.txt b/kernel/Documentation/devicetree/bindings/iommu/iommu.txt
new file mode 100644
index 000000000..5a8b4624d
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/iommu.txt
@@ -0,0 +1,182 @@
+This document describes the generic device tree binding for IOMMUs and their
+master(s).
+
+
+IOMMU device node:
+==================
+
+An IOMMU can provide the following services:
+
+* Remap address space to allow devices to access physical memory ranges that
+  they otherwise wouldn't be capable of accessing.
+
+  Example: 32-bit DMA to 64-bit physical addresses
+
+* Implement scatter-gather at page level granularity so that the device does
+  not have to.
+
+* Provide system protection against "rogue" DMA by forcing all accesses to go
+  through the IOMMU and faulting when encountering accesses to unmapped
+  address regions.
+
+* Provide address space isolation between multiple contexts.
+
+  Example: Virtualization
+
+Device nodes compatible with this binding represent hardware with some of the
+above capabilities.
+
+IOMMUs can be single-master or multiple-master. Single-master IOMMU devices
+typically have a fixed association to the master device, whereas multiple-
+master IOMMU devices can translate accesses from more than one master.
+
+The device tree node of the IOMMU device's parent bus must contain a valid
+"dma-ranges" property that describes how the physical address space of the
+IOMMU maps to memory. An empty "dma-ranges" property means that there is a
+1:1 mapping from IOMMU to memory.
+
+Required properties:
+--------------------
+- #iommu-cells: The number of cells in an IOMMU specifier needed to encode an
+  address.
+
+The meaning of the IOMMU specifier is defined by the device tree binding of
+the specific IOMMU. Below are a few examples of typical use-cases:
+
+- #iommu-cells = <0>: Single master IOMMU devices are not configurable and
+  therefore no additional information needs to be encoded in the specifier.
+  This may also apply to multiple master IOMMU devices that do not allow the
+  association of masters to be configured. Note that an IOMMU can by design
+  be multi-master yet only expose a single master in a given configuration.
+  In such cases the number of cells will usually be 1 as in the next case.
+- #iommu-cells = <1>: Multiple master IOMMU devices may need to be configured
+  in order to enable translation for a given master. In such cases the single
+  address cell corresponds to the master device's ID. In some cases more than
+  one cell can be required to represent a single master ID.
+- #iommu-cells = <4>: Some IOMMU devices allow the DMA window for masters to
+  be configured. The first cell of the address in this may contain the master
+  device's ID for example, while the second cell could contain the start of
+  the DMA window for the given device. The length of the DMA window is given
+  by the third and fourth cells.
+
+Note that these are merely examples and real-world use-cases may use different
+definitions to represent their individual needs. Always refer to the specific
+IOMMU binding for the exact meaning of the cells that make up the specifier.
+
+
+IOMMU master node:
+==================
+
+Devices that access memory through an IOMMU are called masters. A device can
+have multiple master interfaces (to one or more IOMMU devices).
+
+Required properties:
+--------------------
+- iommus: A list of phandle and IOMMU specifier pairs that describe the IOMMU
+  master interfaces of the device. One entry in the list describes one master
+  interface of the device.
+
+When an "iommus" property is specified in a device tree node, the IOMMU will
+be used for address translation. If a "dma-ranges" property exists in the
+device's parent node it will be ignored. An exception to this rule is if the
+referenced IOMMU is disabled, in which case the "dma-ranges" property of the
+parent shall take effect. Note that merely disabling a device tree node does
+not guarantee that the IOMMU is really disabled since the hardware may not
+have a means to turn off translation. But it is invalid in such cases to
+disable the IOMMU's device tree node in the first place because it would
+prevent any driver from properly setting up the translations.
+
+
+Notes:
+======
+
+One possible extension to the above is to use an "iommus" property along with
+a "dma-ranges" property in a bus device node (such as PCI host bridges). This
+can be useful to describe how children on the bus relate to the IOMMU if they
+are not explicitly listed in the device tree (e.g. PCI devices). However, the
+requirements of that use-case haven't been fully determined yet. Implementing
+this is therefore not recommended without further discussion and extension of
+this binding.
+
+
+Examples:
+=========
+
+Single-master IOMMU:
+--------------------
+
+	iommu {
+		#iommu-cells = <0>;
+	};
+
+	master {
+		iommus = <&{/iommu}>;
+	};
+
+Multiple-master IOMMU with fixed associations:
+----------------------------------------------
+
+	/* multiple-master IOMMU */
+	iommu {
+		/*
+		 * Masters are statically associated with this IOMMU and share
+		 * the same address translations because the IOMMU does not
+		 * have sufficient information to distinguish between masters.
+		 *
+		 * Consequently address translation is always on or off for
+		 * all masters at any given point in time.
+		 */
+		#iommu-cells = <0>;
+	};
+
+	/* static association with IOMMU */
+	master@1 {
+		reg = <1>;
+		iommus = <&{/iommu}>;
+	};
+
+	/* static association with IOMMU */
+	master@2 {
+		reg = <2>;
+		iommus = <&{/iommu}>;
+	};
+
+Multiple-master IOMMU:
+----------------------
+
+	iommu {
+		/* the specifier represents the ID of the master */
+		#iommu-cells = <1>;
+	};
+
+	master@1 {
+		/* device has master ID 42 in the IOMMU */
+		iommus = <&{/iommu} 42>;
+	};
+
+	master@2 {
+		/* device has master IDs 23 and 24 in the IOMMU */
+		iommus = <&{/iommu} 23>, <&{/iommu} 24>;
+	};
+
+Multiple-master IOMMU with configurable DMA window:
+---------------------------------------------------
+
+	/ {
+		iommu {
+			/*
+			 * One cell for the master ID and one cell for the
+			 * address of the DMA window. The length of the DMA
+			 * window is encoded in two cells.
+			 *
+			 * The DMA window is the range addressable by the
+			 * master (i.e. the I/O virtual address space).
+			 */
+			#iommu-cells = <4>;
+		};
+
+		master {
+			/* master ID 42, 4 GiB DMA window starting at 0 */
+			iommus = <&{/iommu}  42  0  0x1 0x0>;
+		};
+	};
diff --git a/kernel/Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt b/kernel/Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt
new file mode 100644
index 000000000..099d9362e
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt
@@ -0,0 +1,14 @@
+NVIDIA Tegra 20 GART
+
+Required properties:
+- compatible: "nvidia,tegra20-gart"
+- reg: Two pairs of cells specifying the physical address and size of
+  the memory controller registers and the GART aperture respectively.
+
+Example:
+
+	gart {
+		compatible = "nvidia,tegra20-gart";
+		reg = <0x7000f024 0x00000018	/* controller registers */
+		       0x58000000 0x02000000>;	/* GART aperture */
+	};
diff --git a/kernel/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt b/kernel/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt
new file mode 100644
index 000000000..89fb5434b
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt
@@ -0,0 +1,21 @@
+NVIDIA Tegra 30 IOMMU H/W, SMMU (System Memory Management Unit)
+
+Required properties:
+- compatible : "nvidia,tegra30-smmu"
+- reg : Should contain 3 register banks(address and length) for each
+  of the SMMU register blocks.
+- interrupts : Should contain MC General interrupt.
+- nvidia,#asids : # of ASIDs
+- dma-window : IOVA start address and length.
+- nvidia,ahb : phandle to the ahb bus connected to SMMU.
+
+Example:
+	smmu {
+		compatible = "nvidia,tegra30-smmu";
+		reg = <0x7000f010 0x02c
+		       0x7000f1f0 0x010
+		       0x7000f228 0x05c>;
+		nvidia,#asids = <4>;		/* # of ASIDs */
+		dma-window = <0 0x40000000>;	/* IOVA start & length */
+		nvidia,ahb = <&ahb>;
+	};
diff --git a/kernel/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt b/kernel/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt
new file mode 100644
index 000000000..cd29083e1
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt
@@ -0,0 +1,41 @@
+* Renesas VMSA-Compatible IOMMU
+
+The IPMMU is an IOMMU implementation compatible with the ARM VMSA page tables.
+It provides address translation for bus masters outside of the CPU, each
+connected to the IPMMU through a port called micro-TLB.
+
+
+Required Properties:
+
+  - compatible: Must contain "renesas,ipmmu-vmsa".
+  - reg: Base address and size of the IPMMU registers.
+  - interrupts: Specifiers for the MMU fault interrupts. For instances that
+    support secure mode two interrupts must be specified, for non-secure and
+    secure mode, in that order. For instances that don't support secure mode a
+    single interrupt must be specified.
+
+  - #iommu-cells: Must be 1.
+
+Each bus master connected to an IPMMU must reference the IPMMU in its device
+node with the following property:
+
+  - iommus: A reference to the IPMMU in two cells. The first cell is a phandle
+    to the IPMMU and the second cell the number of the micro-TLB that the
+    device is connected to.
+
+
+Example: R8A7791 IPMMU-MX and VSP1-D0 bus master
+
+	ipmmu_mx: mmu@fe951000 {
+		compatible = "renasas,ipmmu-vmsa";
+		reg = <0 0xfe951000 0 0x1000>;
+		interrupts = <0 222 IRQ_TYPE_LEVEL_HIGH>,
+			     <0 221 IRQ_TYPE_LEVEL_HIGH>;
+		#iommu-cells = <1>;
+	};
+
+	vsp1@fe928000 {
+		...
+		iommus = <&ipmmu_mx 13>;
+		...
+	};
diff --git a/kernel/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/kernel/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
new file mode 100644
index 000000000..9a55ac373
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
@@ -0,0 +1,26 @@
+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
+
+Example:
+
+	vopl_mmu: iommu@ff940300 {
+		compatible = "rockchip,iommu";
+		reg = <0xff940300 0x100>;
+		interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "vopl_mmu";
+		#iommu-cells = <0>;
+	};
diff --git a/kernel/Documentation/devicetree/bindings/iommu/samsung,sysmmu.txt b/kernel/Documentation/devicetree/bindings/iommu/samsung,sysmmu.txt
new file mode 100644
index 000000000..729543c47
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/samsung,sysmmu.txt
@@ -0,0 +1,70 @@
+Samsung Exynos IOMMU H/W, System MMU (System Memory Management Unit)
+
+Samsung's Exynos architecture contains System MMUs that enables scattered
+physical memory chunks visible as a contiguous region to DMA-capable peripheral
+devices like MFC, FIMC, FIMD, GScaler, FIMC-IS and so forth.
+
+System MMU is an IOMMU and supports identical translation table format to
+ARMv7 translation tables with minimum set of page properties including access
+permissions, shareability and security protection. In addition, System MMU has
+another capabilities like L2 TLB or block-fetch buffers to minimize translation
+latency.
+
+System MMUs are in many to one relation with peripheral devices, i.e. single
+peripheral device might have multiple System MMUs (usually one for each bus
+master), but one System MMU can handle transactions from only one peripheral
+device. The relation between a System MMU and the peripheral device needs to be
+defined in device node of the peripheral device.
+
+MFC in all Exynos SoCs and FIMD, M2M Scalers and G2D in Exynos5420 has 2 System
+MMUs.
+* MFC has one System MMU on its left and right bus.
+* FIMD in Exynos5420 has one System MMU for window 0 and 4, the other system MMU
+  for window 1, 2 and 3.
+* M2M Scalers and G2D in Exynos5420 has one System MMU on the read channel and
+  the other System MMU on the write channel.
+The drivers must consider how to handle those System MMUs. One of the idea is
+to implement child devices or sub-devices which are the client devices of the
+System MMU.
+
+Note:
+The current DT binding for the Exynos System MMU is incomplete.
+The following properties can be removed or changed, if found incompatible with
+the "Generic IOMMU Binding" support for attaching devices to the IOMMU.
+
+Required properties:
+- compatible: Should be "samsung,exynos-sysmmu"
+- reg: A tuple of base address and size of System MMU registers.
+- interrupt-parent: The phandle of the interrupt controller of System MMU
+- interrupts: An interrupt specifier for interrupt signal of System MMU,
+	      according to the format defined by a particular interrupt
+	      controller.
+- clock-names: Should be "sysmmu" if the System MMU is needed to gate its clock.
+	       Optional "master" if the clock to the System MMU is gated by
+	       another gate clock other than "sysmmu".
+	       Exynos4 SoCs, there needs no "master" clock.
+	       Exynos5 SoCs, some System MMUs must have "master" clocks.
+- clocks: Required if the System MMU is needed to gate its clock.
+- power-domains: Required if the System MMU is needed to gate its power.
+	  Please refer to the following document:
+	  Documentation/devicetree/bindings/arm/exynos/power_domain.txt
+
+Examples:
+	gsc_0: gsc@13e00000 {
+		compatible = "samsung,exynos5-gsc";
+		reg = <0x13e00000 0x1000>;
+		interrupts = <0 85 0>;
+		power-domains = <&pd_gsc>;
+		clocks = <&clock CLK_GSCL0>;
+		clock-names = "gscl";
+	};
+
+	sysmmu_gsc0: sysmmu@13E80000 {
+		compatible = "samsung,exynos-sysmmu";
+		reg = <0x13E80000 0x1000>;
+		interrupt-parent = <&combiner>;
+		interrupts = <2 0>;
+		clock-names = "sysmmu", "master";
+		clocks = <&clock CLK_SMMU_GSCL0>, <&clock CLK_GSCL0>;
+		power-domains = <&pd_gsc>;
+	};
diff --git a/kernel/Documentation/devicetree/bindings/iommu/ti,omap-iommu.txt b/kernel/Documentation/devicetree/bindings/iommu/ti,omap-iommu.txt
new file mode 100644
index 000000000..42531dc38
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/iommu/ti,omap-iommu.txt
@@ -0,0 +1,26 @@
+OMAP2+ IOMMU
+
+Required properties:
+- compatible : Should be one of,
+		"ti,omap2-iommu" for OMAP2/OMAP3 IOMMU instances
+		"ti,omap4-iommu" for OMAP4/OMAP5 IOMMU instances
+		"ti,dra7-iommu" for DRA7xx IOMMU instances
+- ti,hwmods  : Name of the hwmod associated with the IOMMU instance
+- reg        : Address space for the configuration registers
+- interrupts : Interrupt specifier for the IOMMU instance
+
+Optional properties:
+- ti,#tlb-entries : Number of entries in the translation look-aside buffer.
+                    Should be either 8 or 32 (default: 32)
+- ti,iommu-bus-err-back : Indicates the IOMMU instance supports throwing
+		          back a bus error response on MMU faults.
+
+Example:
+	/* OMAP3 ISP MMU */
+	mmu_isp: mmu@480bd400 {
+		compatible = "ti,omap2-iommu";
+		reg = <0x480bd400 0x80>;
+		interrupts = <24>;
+		ti,hwmods = "mmu_isp";
+		ti,#tlb-entries = <8>;
+	};