Merge 28e7241cb8 ("Merge tag 'mips_6.11_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux") into android-mainline

Steps on the way to v6.11-rc1 Signed-off-by: Lee Jones <joneslee@google.com> Change-Id: I7e64f7c84ed94fecda8ec270c55d57eb2bc10499
2024-08-21 16:56:14 +01:00
parent 00fecad397 28e7241cb8
commit 994171408a
450 changed files with 11124 additions and 3583 deletions
@@ -454,7 +454,7 @@ ignore-unaligned-usertrap

 On architectures where unaligned accesses cause traps, and where this
 feature is supported (``CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN``;
-currently, ``arc`` and ``loongarch``), controls whether all
+currently, ``arc``, ``parisc`` and ``loongarch``), controls whether all
 unaligned traps are logged.

 = =============================================================
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/fsl,imx-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Direct Memory Access (DMA) Controller for i.MX
+
+maintainers:
+  - Animesh Agarwal <animeshagarwal28@gmail.com>
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx1-dma
+      - fsl,imx21-dma
+      - fsl,imx27-dma
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: DMA complete interrupt
+      - description: DMA Error interrupt
+    minItems: 1
+
+  "#dma-cells":
+    const: 1
+
+  dma-channels:
+    const: 16
+
+  dma-requests:
+    description: Number of DMA requests supported.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#dma-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    dma-controller@10001000 {
+      compatible = "fsl,imx27-dma";
+      reg = <0x10001000 0x1000>;
+      interrupts = <32 33>;
+      #dma-cells = <1>;
+      dma-channels = <16>;
+    };
@@ -1,50 +0,0 @@
-* Freescale Direct Memory Access (DMA) Controller for i.MX
-
-This document will only describe differences to the generic DMA Controller and
-DMA request bindings as described in dma/dma.txt .
-
-* DMA controller
-
-Required properties:
- compatible : Should be "fsl,<chip>-dma". chip can be imx1, imx21 or imx27
- reg : Should contain DMA registers location and length
- interrupts : First item should be DMA interrupt, second one is optional and
-    should contain DMA Error interrupt
- #dma-cells : Has to be 1. imx-dma does not support anything else.
-
-Optional properties:
- dma-channels : Number of DMA channels supported. Should be 16.
- #dma-channels : deprecated
- dma-requests : Number of DMA requests supported.
- #dma-requests : deprecated
-
-Example:
-
-	dma: dma@10001000 {
-		compatible = "fsl,imx27-dma";
-		reg = <0x10001000 0x1000>;
-		interrupts = <32 33>;
-		#dma-cells = <1>;
-		dma-channels = <16>;
-	};
-
-
-* DMA client
-
-Clients have to specify the DMA requests with phandles in a list.
-
-Required properties:
- dmas: List of one or more DMA request specifiers. One DMA request specifier
-    consists of a phandle to the DMA controller followed by the integer
-    specifying the request line.
- dma-names: List of string identifiers for the DMA requests. For the correct
-    names, have a look at the specific client driver.
-
-Example:
-
-	sdhci1: sdhci@10013000 {
-		...
-		dmas = <&dma 7>;
-		dma-names = "rx-tx";
-		...
-	};
@@ -1,58 +0,0 @@
-NXP Layerscape SoC qDMA Controller
-==================================
-
-This device follows the generic DMA bindings defined in dma/dma.txt.
-
-Required properties:
-
- compatible:		Must be one of
-			 "fsl,ls1021a-qdma": for LS1021A Board
-			 "fsl,ls1028a-qdma": for LS1028A Board
-			 "fsl,ls1043a-qdma": for ls1043A Board
-			 "fsl,ls1046a-qdma": for ls1046A Board
- reg:			Should contain the register's base address and length.
- interrupts:		Should contain a reference to the interrupt used by this
-			device.
- interrupt-names:	Should contain interrupt names:
-			 "qdma-queue0": the block0 interrupt
-			 "qdma-queue1": the block1 interrupt
-			 "qdma-queue2": the block2 interrupt
-			 "qdma-queue3": the block3 interrupt
-			 "qdma-error":  the error interrupt
- fsl,dma-queues:	Should contain number of queues supported.
- dma-channels:	Number of DMA channels supported
- block-number:	the virtual block number
- block-offset:	the offset of different virtual block
- status-sizes:	status queue size of per virtual block
- queue-sizes:		command queue size of per virtual block, the size number
-			based on queues
-
-Optional properties:
-
- dma-channels:		Number of DMA channels supported by the controller.
- big-endian:		If present registers and hardware scatter/gather descriptors
-			of the qDMA are implemented in big endian mode, otherwise in little
-			mode.
-
-Examples:
-
-	qdma: dma-controller@8390000 {
-			compatible = "fsl,ls1021a-qdma";
-			reg = <0x0 0x8388000 0x0 0x1000>, /* Controller regs */
-			      <0x0 0x8389000 0x0 0x1000>, /* Status regs */
-			      <0x0 0x838a000 0x0 0x2000>; /* Block regs */
-			interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>,
-				     <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
-				     <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
-			interrupt-names = "qdma-error",
-				"qdma-queue0", "qdma-queue1";
-			dma-channels = <8>;
-			block-number = <2>;
-			block-offset = <0x1000>;
-			fsl,dma-queues = <2>;
-			status-sizes = <64>;
-			queue-sizes = <64 64>;
-			big-endian;
-		};
-
-DMA clients must use the format described in dma/dma.txt file.
@@ -0,0 +1,132 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/fsl-qdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP Layerscape SoC qDMA Controller
+
+maintainers:
+  - Frank Li <Frank.Li@nxp.com>
+
+properties:
+  compatible:
+    enum:
+      - fsl,ls1021a-qdma
+      - fsl,ls1028a-qdma
+      - fsl,ls1043a-qdma
+      - fsl,ls1046a-qdma
+
+  reg:
+    items:
+      - description: Controller regs
+      - description: Status regs
+      - description: Block regs
+
+  interrupts:
+    minItems: 2
+    maxItems: 5
+
+  interrupt-names:
+    minItems: 2
+    items:
+      - const: qdma-error
+      - const: qdma-queue0
+      - const: qdma-queue1
+      - const: qdma-queue2
+      - const: qdma-queue3
+
+  dma-channels:
+    minimum: 1
+    maximum: 64
+
+  fsl,dma-queues:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Should contain number of queues supported.
+    minimum: 1
+    maximum: 4
+
+  block-number:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: the virtual block number
+
+  block-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: the offset of different virtual block
+
+  status-sizes:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: status queue size of per virtual block
+
+  queue-sizes:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      command queue size of per virtual block, the size number
+      based on queues
+
+  big-endian:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      If present registers and hardware scatter/gather descriptors
+      of the qDMA are implemented in big endian mode, otherwise in little
+      mode.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - fsl,dma-queues
+  - block-number
+  - block-offset
+  - status-sizes
+  - queue-sizes
+
+allOf:
+  - $ref: dma-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,ls1028a-qdma
+              - fsl,ls1043a-qdma
+              - fsl,ls1046a-qdma
+    then:
+      properties:
+        interrupts:
+          minItems: 5
+        interrupt-names:
+          minItems: 5
+    else:
+      properties:
+        interrupts:
+          maxItems: 3
+        interrupt-names:
+          maxItems: 3
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    dma-controller@8390000 {
+        compatible = "fsl,ls1021a-qdma";
+        reg = <0x8388000 0x1000>, /* Controller regs */
+              <0x8389000 0x1000>, /* Status regs */
+              <0x838a000 0x2000>; /* Block regs */
+        interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "qdma-error", "qdma-queue0", "qdma-queue1";
+        #dma-cells = <1>;
+        dma-channels = <8>;
+        block-number = <2>;
+        block-offset = <0x1000>;
+        status-sizes = <64>;
+        queue-sizes = <64 64>;
+        big-endian;
+        fsl,dma-queues = <2>;
+    };
+
@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/sprd,sc9860-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spreadtrum SC9860 DMA controller
+
+description: |
+  There are three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP
+  DMA controller, it can or do not request the IRQ, which will save
+  system power without resuming system by DMA interrupts if AGCP DMA
+  does not request the IRQ.
+
+maintainers:
+  - Orson Zhai <orsonzhai@gmail.com>
+  - Baolin Wang <baolin.wang7@gmail.com>
+  - Chunyan Zhang <zhang.lyra@gmail.com>
+
+properties:
+  compatible:
+    const: sprd,sc9860-dma
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    items:
+      - description: DMA enable clock
+      - description: optional ashb_eb clock, only for the AGCP DMA controller
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: enable
+      - const: ashb_eb
+
+  '#dma-cells':
+    const: 1
+
+  dma-channels:
+    const: 32
+
+  '#dma-channels':
+    const: 32
+    deprecated: true
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#dma-cells'
+  - dma-channels
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    /* AP DMA controller */
+    dma-controller@20100000 {
+      compatible = "sprd,sc9860-dma";
+      reg = <0x20100000 0x4000>;
+      interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&apahb_gate CLK_DMA_EB>;
+      clock-names = "enable";
+      #dma-cells = <1>;
+      dma-channels = <32>;
+    };
+
+    /* AGCP DMA controller */
+    dma-controller@41580000 {
+      compatible = "sprd,sc9860-dma";
+      reg = <0x41580000 0x4000>;
+      clocks = <&agcp_gate CLK_AGCP_DMAAP_EB>,
+               <&agcp_gate CLK_AGCP_AP_ASHB_EB>;
+      clock-names = "enable", "ashb_eb";
+      #dma-cells = <1>;
+      dma-channels = <32>;
+    };
+...
@@ -1,44 +0,0 @@
-* Spreadtrum DMA controller
-
-This binding follows the generic DMA bindings defined in dma.txt.
-
-Required properties:
- compatible: Should be "sprd,sc9860-dma".
- reg: Should contain DMA registers location and length.
- interrupts: Should contain one interrupt shared by all channel.
- #dma-cells: must be <1>. Used to represent the number of integer
-	cells in the dmas property of client device.
- dma-channels : Number of DMA channels supported. Should be 32.
- clock-names: Should contain the clock of the DMA controller.
- clocks: Should contain a clock specifier for each entry in clock-names.
-
-Deprecated properties:
- #dma-channels : Number of DMA channels supported. Should be 32.
-
-Example:
-
-Controller:
-apdma: dma-controller@20100000 {
-	compatible = "sprd,sc9860-dma";
-	reg = <0x20100000 0x4000>;
-	interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
-	#dma-cells = <1>;
-	dma-channels = <32>;
-	clock-names = "enable";
-	clocks = <&clk_ap_ahb_gates 5>;
-};
-
-
-Client:
-DMA clients connected to the Spreadtrum DMA controller must use the format
-described in the dma.txt file, using a two-cell specifier for each channel.
-The two cells in order are:
-1. A phandle pointing to the DMA controller.
-2. The slave id.
-
-spi0: spi@70a00000{
-	...
-	dma-names = "rx_chn", "tx_chn";
-	dmas = <&apdma 11>, <&apdma 12>;
-	...
-};
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/dma/st,stm32-dma.yaml#
+$id: http://devicetree.org/schemas/dma/stm32/st,stm32-dma.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#

 title: STMicroelectronics STM32 DMA Controller
@@ -53,7 +53,7 @@ maintainers:
  - Amelie Delaunay <amelie.delaunay@foss.st.com>

 allOf:
-  - $ref: dma-controller.yaml#
+  - $ref: /schemas/dma/dma-controller.yaml#

 properties:
  "#dma-cells":
@@ -0,0 +1,135 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/stm32/st,stm32-dma3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 DMA3 Controller
+
+description: |
+  The STM32 DMA3 is a direct memory access controller with different features
+  depending on its hardware configuration.
+  It is either called LPDMA (Low Power), GPDMA (General Purpose) or HPDMA (High
+  Performance).
+  Its hardware configuration registers allow to dynamically expose its features.
+
+  GPDMA and HPDMA support 16 independent DMA channels, while only 4 for LPDMA.
+  GPDMA and HPDMA support 256 DMA requests from peripherals, 8 for LPDMA.
+
+  Bindings are generic for these 3 STM32 DMA3 configurations.
+
+  DMA clients connected to the STM32 DMA3 controller must use the format
+  described in "#dma-cells" property description below, using a three-cell
+  specifier for each channel.
+
+maintainers:
+  - Amelie Delaunay <amelie.delaunay@foss.st.com>
+
+allOf:
+  - $ref: /schemas/dma/dma-controller.yaml#
+
+properties:
+  compatible:
+    const: st,stm32mp25-dma3
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 4
+    maxItems: 16
+    description:
+      Should contain all of the per-channel DMA interrupts in ascending order
+      with respect to the DMA channel index.
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  "#dma-cells":
+    const: 3
+    description: |
+      Specifies the number of cells needed to provide DMA controller specific
+      information.
+      The first cell is the request line number.
+      The second cell is a 32-bit mask specifying the DMA channel requirements:
+        -bit 0-1: The priority level
+          0x0: low priority, low weight
+          0x1: low priority, mid weight
+          0x2: low priority, high weight
+          0x3: high priority
+        -bit 4-7: The FIFO requirement for queuing source/destination transfers
+          0x0: no FIFO requirement/any channel can fit
+          0x2: FIFO of 8 bytes (2^2+1)
+          0x4: FIFO of 32 bytes (2^4+1)
+          0x6: FIFO of 128 bytes (2^6+1)
+          0x7: FIFO of 256 bytes (2^7+1)
+      The third cell is a 32-bit mask specifying the DMA transfer requirements:
+        -bit 0: The source incrementing burst
+          0x0: fixed burst
+          0x1: contiguously incremented burst
+        -bit 1: The source allocated port
+          0x0: port 0 is allocated to the source transfer
+          0x1: port 1 is allocated to the source transfer
+        -bit 4: The destination incrementing burst
+          0x0: fixed burst
+          0x1: contiguously incremented burst
+        -bit 5: The destination allocated port
+          0x0: port 0 is allocated to the destination transfer
+          0x1: port 1 is allocated to the destination transfer
+        -bit 8: The type of hardware request
+          0x0: burst
+          0x1: block
+        -bit 9: The control mode
+          0x0: DMA controller control mode
+          0x1: peripheral control mode
+        -bit 12-13: The transfer complete event mode
+          0x0: at block level, transfer complete event is generated at the end
+               of a block
+          0x2: at LLI level, the transfer complete event is generated at the end
+               of the LLI transfer
+               including the update of the LLI if any
+          0x3: at channel level, the transfer complete event is generated at the
+               end of the last LLI
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - "#dma-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
+    dma-controller@40400000 {
+      compatible = "st,stm32mp25-dma3";
+      reg = <0x40400000 0x1000>;
+      interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&rcc CK_BUS_HPDMA1>;
+      #dma-cells = <3>;
+    };
+...
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/dma/st,stm32-dmamux.yaml#
+$id: http://devicetree.org/schemas/dma/stm32/st,stm32-dmamux.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#

 title: STMicroelectronics STM32 DMA MUX (DMA request router)
@@ -10,7 +10,7 @@ maintainers:
  - Amelie Delaunay <amelie.delaunay@foss.st.com>

 allOf:
-  - $ref: dma-router.yaml#
+  - $ref: /schemas/dma/dma-router.yaml#

 properties:
  "#dma-cells":
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/dma/st,stm32-mdma.yaml#
+$id: http://devicetree.org/schemas/dma/stm32/st,stm32-mdma.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#

 title: STMicroelectronics STM32 MDMA Controller
@@ -53,7 +53,7 @@ maintainers:
  - Amelie Delaunay <amelie.delaunay@foss.st.com>

 allOf:
-  - $ref: dma-controller.yaml#
+  - $ref: /schemas/dma/dma-controller.yaml#

 properties:
  "#dma-cells":
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/airoha,en7581-pcie-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha EN7581 PCI-Express PHY
+
+maintainers:
+  - Lorenzo Bianconi <lorenzo@kernel.org>
+
+description:
+  The PCIe PHY supports physical layer functionality for PCIe Gen2/Gen3 port.
+
+properties:
+  compatible:
+    const: airoha,en7581-pcie-phy
+
+  reg:
+    items:
+      - description: PCIE analog base address
+      - description: PCIE lane0 base address
+      - description: PCIE lane1 base address
+      - description: PCIE lane0 detection time base address
+      - description: PCIE lane1 detection time base address
+      - description: PCIE Rx AEQ base address
+
+  reg-names:
+    items:
+      - const: csr-2l
+      - const: pma0
+      - const: pma1
+      - const: p0-xr-dtime
+      - const: p1-xr-dtime
+      - const: rx-aeq
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/phy/phy.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        phy@11e80000 {
+            compatible = "airoha,en7581-pcie-phy";
+            #phy-cells = <0>;
+            reg = <0x0 0x1fa5a000 0x0 0xfff>,
+                  <0x0 0x1fa5b000 0x0 0xfff>,
+                  <0x0 0x1fa5c000 0x0 0xfff>,
+                  <0x0 0x1fc10044 0x0 0x4>,
+                  <0x0 0x1fc30044 0x0 0x4>,
+                  <0x0 0x1fc15030 0x0 0x104>;
+            reg-names = "csr-2l", "pma0", "pma1",
+                        "p0-xr-dtime", "p1-xr-dtime",
+                        "rx-aeq";
+        };
+    };
@@ -41,6 +41,9 @@ properties:
      Phandle to a regulator that provides power to the PHY. This
      regulator will be managed during the PHY power on/off sequence.

+  power-domains:
+    maxItems: 1
+
 required:
  - compatible
  - reg
@@ -0,0 +1,164 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/fsl,imx8qm-hsio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8QM SoC series High Speed IO(HSIO) SERDES PHY
+
+maintainers:
+  - Richard Zhu <hongxing.zhu@nxp.com>
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx8qm-hsio
+      - fsl,imx8qxp-hsio
+  reg:
+    items:
+      - description: Base address and length of the PHY block
+      - description: HSIO control and status registers(CSR) of the PHY
+      - description: HSIO CSR of the controller bound to the PHY
+      - description: HSIO CSR for MISC
+
+  reg-names:
+    items:
+      - const: reg
+      - const: phy
+      - const: ctrl
+      - const: misc
+
+  "#phy-cells":
+    const: 3
+    description:
+      The first defines lane index.
+      The second defines the type of the PHY refer to the include phy.h.
+      The third defines the controller index, indicated which controller
+      is bound to the lane.
+
+  clocks:
+    minItems: 5
+    maxItems: 14
+
+  clock-names:
+    minItems: 5
+    maxItems: 14
+
+  fsl,hsio-cfg:
+    description: |
+      Specifies the use case of the HSIO module in the hardware design.
+      Regarding the design of i.MX8QM HSIO subsystem, HSIO module can be
+      confiured as following three use cases.
+      +---------------------------------------+
+      |                  | i.MX8QM            |
+      |------------------|--------------------|
+      |                  | Lane0| Lane1| Lane2|
+      |------------------|------|------|------|
+      | pciea-x2-sata    | PCIEA| PCIEA| SATA |
+      |------------------|------|------|------|
+      | pciea-x2-pcieb   | PCIEA| PCIEA| PCIEB|
+      |------------------|------|------|------|
+      | pciea-pcieb-sata | PCIEA| PCIEB| SATA |
+      +---------------------------------------+
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ pciea-x2-sata, pciea-x2-pcieb, pciea-pcieb-sata]
+    default: pciea-pcieb-sata
+
+  fsl,refclk-pad-mode:
+    description:
+      Specifies the mode of the refclk pad used. INPUT(PHY refclock is
+      provided externally via the refclk pad) or OUTPUT(PHY refclock is
+      derived from SoC internal source and provided on the refclk pad).
+      This property not exists means unused(PHY refclock is derived from
+      SoC internal source).
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ input, output, unused ]
+    default: unused
+
+  power-domains:
+    minItems: 1
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - "#phy-cells"
+  - clocks
+  - clock-names
+  - fsl,hsio-cfg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qxp-hsio
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pclk0
+            - const: apb_pclk0
+            - const: phy0_crr
+            - const: ctl0_crr
+            - const: misc_crr
+        power-domains:
+          maxItems: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qm-hsio
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pclk0
+            - const: pclk1
+            - const: apb_pclk0
+            - const: apb_pclk1
+            - const: pclk2
+            - const: epcs_tx
+            - const: epcs_rx
+            - const: apb_pclk2
+            - const: phy0_crr
+            - const: phy1_crr
+            - const: ctl0_crr
+            - const: ctl1_crr
+            - const: ctl2_crr
+            - const: misc_crr
+        power-domains:
+          minItems: 2
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8-clock.h>
+    #include <dt-bindings/clock/imx8-lpcg.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    #include <dt-bindings/phy/phy-imx8-pcie.h>
+
+    phy@5f1a0000 {
+        compatible = "fsl,imx8qxp-hsio";
+        reg = <0x5f1a0000 0x10000>,
+              <0x5f120000 0x10000>,
+              <0x5f140000 0x10000>,
+              <0x5f160000 0x10000>;
+        reg-names = "reg", "phy", "ctrl", "misc";
+        clocks = <&phyx1_lpcg IMX_LPCG_CLK_0>,
+                 <&phyx1_lpcg IMX_LPCG_CLK_4>,
+                 <&phyx1_crr1_lpcg IMX_LPCG_CLK_4>,
+                 <&pcieb_crr3_lpcg IMX_LPCG_CLK_4>,
+                 <&misc_crr5_lpcg IMX_LPCG_CLK_4>;
+        clock-names = "pclk0", "apb_pclk0", "phy0_crr", "ctl0_crr", "misc_crr";
+        power-domains = <&pd IMX_SC_R_SERDES_1>;
+        #phy-cells = <3>;
+        fsl,hsio-cfg = "pciea-pcieb-sata";
+        fsl,refclk-pad-mode = "input";
+    };
+...
@@ -41,6 +41,12 @@ properties:
      Phandle to the system controller node
    $ref: /schemas/types.yaml#/definitions/phandle

+  swap-dx-lanes:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: |
+      Specifies the ports which will swap the differential-pair (D+/D-),
+      default is not-swapped.
+
 # Required child nodes:

 patternProperties:
@@ -19,6 +19,8 @@ properties:
      - qcom,ipq6018-qmp-pcie-phy
      - qcom,ipq8074-qmp-gen3-pcie-phy
      - qcom,ipq8074-qmp-pcie-phy
+      - qcom,ipq9574-qmp-gen3x1-pcie-phy
+      - qcom,ipq9574-qmp-gen3x2-pcie-phy

  reg:
    items:
@@ -91,8 +91,7 @@ properties:
  "#clock-cells": true

  clock-output-names:
-    minItems: 1
-    maxItems: 2
+    maxItems: 1

  "#phy-cells":
    const: 0
@@ -222,14 +221,10 @@ allOf:
              - qcom,sm8650-qmp-gen4x2-pcie-phy
    then:
      properties:
-        clock-output-names:
-          minItems: 2
        "#clock-cells":
          const: 1
    else:
      properties:
-        clock-output-names:
-          maxItems: 1
        "#clock-cells":
          const: 0

@@ -20,8 +20,9 @@ properties:
      - qcom,ipq8074-qmp-usb3-phy
      - qcom,ipq9574-qmp-usb3-phy
      - qcom,msm8996-qmp-usb3-phy
-      - com,qdu1000-qmp-usb3-uni-phy
+      - qcom,qdu1000-qmp-usb3-uni-phy
      - qcom,sa8775p-qmp-usb3-uni-phy
+      - qcom,sc8180x-qmp-usb3-uni-phy
      - qcom,sc8280xp-qmp-usb3-uni-phy
      - qcom,sdm845-qmp-usb3-uni-phy
      - qcom,sdx55-qmp-usb3-uni-phy
@@ -112,6 +113,7 @@ allOf:
            enum:
              - qcom,qdu1000-qmp-usb3-uni-phy
              - qcom,sa8775p-qmp-usb3-uni-phy
+              - qcom,sc8180x-qmp-usb3-uni-phy
              - qcom,sc8280xp-qmp-usb3-uni-phy
              - qcom,sm8150-qmp-usb3-uni-phy
              - qcom,sm8250-qmp-usb3-uni-phy
@@ -152,6 +154,7 @@ allOf:
          contains:
            enum:
              - qcom,sa8775p-qmp-usb3-uni-phy
+              - qcom,sc8180x-qmp-usb3-uni-phy
              - qcom,sc8280xp-qmp-usb3-uni-phy
              - qcom,x1e80100-qmp-usb3-uni-phy
    then:
@@ -15,6 +15,7 @@ if:
      contains:
        enum:
          - qcom,usb-hs-phy-apq8064
+          - qcom,usb-hs-phy-msm8660
          - qcom,usb-hs-phy-msm8960
 then:
  properties:
@@ -41,6 +42,7 @@ properties:
      - enum:
          - qcom,usb-hs-phy-apq8064
          - qcom,usb-hs-phy-msm8226
+          - qcom,usb-hs-phy-msm8660
          - qcom,usb-hs-phy-msm8916
          - qcom,usb-hs-phy-msm8960
          - qcom,usb-hs-phy-msm8974
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/rockchip,rk3399-emmc-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip EMMC PHY
+
+maintainers:
+  - Heiko Stuebner <heiko@sntech.de>
+
+properties:
+  compatible:
+    const: rockchip,rk3399-emmc-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: emmcclk
+
+  drive-impedance-ohm:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Specifies the drive impedance in Ohm.
+    enum: [33, 40, 50, 66, 100]
+    default: 50
+
+  rockchip,enable-strobe-pulldown:
+    type: boolean
+    description: |
+      Enable internal pull-down for the strobe
+      line.  If not set, pull-down is not used.
+
+  rockchip,output-tapdelay-select:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Specifies the phyctrl_otapdlysec register.
+    default: 0x4
+    maximum: 0xf
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@f780 {
+      compatible = "rockchip,rk3399-emmc-phy";
+      reg = <0xf780 0x20>;
+      clocks = <&sdhci>;
+      clock-names = "emmcclk";
+      drive-impedance-ohm = <50>;
+      #phy-cells = <0>;
+    };
@@ -1,43 +0,0 @@
-Rockchip EMMC PHY
-----------------------
-
-Required properties:
- - compatible: rockchip,rk3399-emmc-phy
- - #phy-cells: must be 0
- - reg: PHY register address offset and length in "general
-   register files"
-
-Optional properties:
- - clock-names: Should contain "emmcclk".  Although this is listed as optional
-		(because most boards can get basic functionality without having
-		access to it), it is strongly suggested.
-		See ../clock/clock-bindings.txt for details.
- - clocks: Should have a phandle to the card clock exported by the SDHCI driver.
- - drive-impedance-ohm: Specifies the drive impedance in Ohm.
-                        Possible values are 33, 40, 50, 66 and 100.
-                        If not set, the default value of 50 will be applied.
- - rockchip,enable-strobe-pulldown: Enable internal pull-down for the strobe
-                                    line.  If not set, pull-down is not used.
- - rockchip,output-tapdelay-select: Specifies the phyctrl_otapdlysec register.
-                                    If not set, the register defaults to 0x4.
-                                    Maximum value 0xf.
-
-Example:
-
-
-grf: syscon@ff770000 {
-	compatible = "rockchip,rk3399-grf", "syscon", "simple-mfd";
-	#address-cells = <1>;
-	#size-cells = <1>;
-
-...
-
-	emmcphy: phy@f780 {
-		compatible = "rockchip,rk3399-emmc-phy";
-		reg = <0xf780 0x20>;
-		clocks = <&sdhci>;
-		clock-names = "emmcclk";
-		drive-impedance-ohm = <50>;
-		#phy-cells = <0>;
-	};
-};
@@ -25,6 +25,7 @@ description: |
 properties:
  compatible:
    enum:
+      - google,gs101-usb31drd-phy
      - samsung,exynos5250-usbdrd-phy
      - samsung,exynos5420-usbdrd-phy
      - samsung,exynos5433-usbdrd-phy
@@ -57,7 +58,15 @@ properties:
      the OF graph bindings specified.

  reg:
-    maxItems: 1
+    minItems: 1
+    maxItems: 3
+
+  reg-names:
+    minItems: 1
+    items:
+      - const: phy
+      - const: pcs
+      - const: pma

  samsung,pmu-syscon:
    $ref: /schemas/types.yaml#/definitions/phandle
@@ -72,6 +81,19 @@ properties:
    description:
      VBUS Boost 5V power source.

+  pll-supply:
+    description: Power supply for the USB PLL.
+  dvdd-usb20-supply:
+    description: DVDD power supply for the USB 2.0 phy.
+  vddh-usb20-supply:
+    description: VDDh power supply for the USB 2.0 phy.
+  vdd33-usb20-supply:
+    description: 3.3V power supply for the USB 2.0 phy.
+  vdda-usbdp-supply:
+    description: VDDa power supply for the USB DP phy.
+  vddh-usbdp-supply:
+    description: VDDh power supply for the USB DP phy.
+
 required:
  - compatible
  - clocks
@@ -81,6 +103,40 @@ required:
  - samsung,pmu-syscon

 allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: google,gs101-usb31drd-phy
+    then:
+      properties:
+        clocks:
+          items:
+            - description: Gate of main PHY clock
+            - description: Gate of PHY reference clock
+            - description: Gate of control interface AXI clock
+            - description: Gate of control interface APB clock
+            - description: Gate of SCL APB clock
+        clock-names:
+          items:
+            - const: phy
+            - const: ref
+            - const: ctrl_aclk
+            - const: ctrl_pclk
+            - const: scl_pclk
+        reg:
+          minItems: 3
+        reg-names:
+          minItems: 3
+      required:
+        - reg-names
+        - pll-supply
+        - dvdd-usb20-supply
+        - vddh-usb20-supply
+        - vdd33-usb20-supply
+        - vdda-usbdp-supply
+        - vddh-usbdp-supply
+
  - if:
      properties:
        compatible:
@@ -100,7 +156,20 @@ allOf:
            - const: phy_utmi
            - const: phy_pipe
            - const: itp
-    else:
+        reg:
+          maxItems: 1
+        reg-names:
+          maxItems: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos5250-usbdrd-phy
+              - samsung,exynos5420-usbdrd-phy
+              - samsung,exynos850-usbdrd-phy
+    then:
      properties:
        clocks:
          minItems: 2
@@ -109,6 +178,10 @@ allOf:
          items:
            - const: phy
            - const: ref
+        reg:
+          maxItems: 1
+        reg-names:
+          maxItems: 1

 additionalProperties: false

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/starfive,jh7110-dphy-tx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Starfive SoC MIPI D-PHY Tx Controller
+
+maintainers:
+  - Keith Zhao <keith.zhao@starfivetech.com>
+  - Shengyang Chen <shengyang.chen@starfivetech.com>
+
+description:
+  The Starfive SoC uses the MIPI DSI D-PHY based on M31 IP to transfer
+  DSI data.
+
+properties:
+  compatible:
+    const: starfive,jh7110-dphy-tx
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: txesc
+
+  resets:
+    items:
+      - description: MIPITX_DPHY_SYS reset
+
+  reset-names:
+    items:
+      - const: sys
+
+  power-domains:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+  - power-domains
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@295e0000 {
+      compatible = "starfive,jh7110-dphy-tx";
+      reg = <0x295e0000 0x10000>;
+      clocks = <&voutcrg 14>;
+      clock-names = "txesc";
+      resets = <&syscrg 10>;
+      reset-names = "sys";
+      power-domains = <&aon_syscon 0>;
+      #phy-cells = <0>;
+    };
@@ -176,9 +176,10 @@ allOf:
            Documentation/devicetree/bindings/phy/rockchip-pcie-phy.txt

      patternProperties:
-        "phy@[0-9a-f]+$":
-          description:
-            Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
+        "^phy@[0-9a-f]+$":
+          type: object
+          $ref: /schemas/phy/rockchip,rk3399-emmc-phy.yaml#
+          unevaluatedProperties: false

  - if:
      properties:
@@ -292,6 +293,15 @@ examples:
        #phy-cells = <0>;
      };

+      phy@f780 {
+        compatible = "rockchip,rk3399-emmc-phy";
+        reg = <0xf780 0x20>;
+        clocks = <&sdhci>;
+        clock-names = "emmcclk";
+        drive-impedance-ohm = <50>;
+        #phy-cells = <0>;
+      };
+
      u2phy0: usb2phy@e450 {
        compatible = "rockchip,rk3399-usb2phy";
        reg = <0xe450 0x10>;
@@ -42,7 +42,7 @@ properties:
  dmas:
    description: |
      DMA specifiers for tx and rx dma. DMA fifo mode must be used. See
-      the STM32 DMA bindings Documentation/devicetree/bindings/dma/st,stm32-dma.yaml.
+      the STM32 DMA controllers bindings Documentation/devicetree/bindings/dma/stm32/*.yaml.
    items:
      - description: rx DMA channel
      - description: tx DMA channel
@@ -28,7 +28,7 @@ properties:
      Add this property to disable the watchdog during suspend.
      Only use this option if you can't use the watchdog automatic suspend
      function during a suspend (see register CONTROL_B).
-  
+
  dlg,wdt-sd:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]
@@ -29,6 +29,7 @@ properties:
              - renesas,r9a07g043-wdt    # RZ/G2UL and RZ/Five
              - renesas,r9a07g044-wdt    # RZ/G2{L,LC}
              - renesas,r9a07g054-wdt    # RZ/V2L
+              - renesas,r9a08g045-wdt    # RZ/G3S
          - const: renesas,rzg2l-wdt

      - items:
@@ -18,7 +18,7 @@ Architecture   Level of support  Constraints
 ``arm64``      Maintained        Little Endian only.
 ``loongarch``  Maintained        \-
 ``riscv``      Maintained        ``riscv64`` only.
-``um``         Maintained        ``x86_64`` only.
+``um``         Maintained        \-
 ``x86``        Maintained        ``x86_64`` only.
 =============  ================  ==============================================

@@ -223,8 +223,6 @@ remote UML and other VM instances.
 +-----------+--------+------------------------------------+------------+
 | socket    | legacy | none                               | ~ 450Mbit  |
 +-----------+--------+------------------------------------+------------+
-| pcap      | legacy | rx only                            | ~ 450Mbit  |
-+-----------+--------+------------------------------------+------------+
 | ethertap  | legacy | obsolete                           | ~ 500Mbit  |
 +-----------+--------+------------------------------------+------------+
 | vde       | legacy | obsolete                           | ~ 500Mbit  |
@@ -702,6 +702,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml
 F:	drivers/net/ethernet/mediatek/airoha_eth.c

+AIROHA PCIE PHY DRIVER
+M:	Lorenzo Bianconi <lorenzo@kernel.org>
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/phy/airoha,en7581-pcie-phy.yaml
+F:	drivers/phy/phy-airoha-pcie-regs.h
+F:	drivers/phy/phy-airoha-pcie.c
+
 AIROHA SPI SNFI DRIVER
 M:	Lorenzo Bianconi <lorenzo@kernel.org>
 M:	Ray Liu <ray.liu@airoha.com>
@@ -6842,6 +6850,7 @@ F:	include/linux/fwnode.h
 F:	include/linux/kobj*
 F:	include/linux/property.h
 F:	lib/kobj*
+F:	rust/kernel/device.rs

 DRIVERS FOR OMAP ADAPTIVE VOLTAGE SCALING (AVS)
 M:	Nishanth Menon <nm@ti.com>
@@ -8708,10 +8717,12 @@ F:	include/linux/arm_ffa.h
 FIRMWARE LOADER (request_firmware)
 M:	Luis Chamberlain <mcgrof@kernel.org>
 M:	Russ Weight <russ.weight@linux.dev>
+M:	Danilo Krummrich <dakr@redhat.com>
 L:	linux-kernel@vger.kernel.org
 S:	Maintained
 F:	Documentation/firmware_class/
 F:	drivers/base/firmware_loader/
+F:	rust/kernel/firmware.rs
 F:	include/linux/firmware.h

 FLEXTIMER FTM-QUADDEC DRIVER
@@ -19064,7 +19075,13 @@ S:	Maintained
 T:	git https://git.kernel.org/pub/scm/linux/kernel/git/crng/random.git
 F:	Documentation/devicetree/bindings/rng/microsoft,vmgenid.yaml
 F:	drivers/char/random.c
+F:	include/linux/random.h
+F:	include/uapi/linux/random.h
 F:	drivers/virt/vmgenid.c
+F:	include/vdso/getrandom.h
+F:	lib/vdso/getrandom.c
+F:	arch/x86/entry/vdso/vgetrandom*
+F:	arch/x86/include/asm/vdso/getrandom*

 RAPIDIO SUBSYSTEM
 M:	Matt Porter <mporter@kernel.crashing.org>
@@ -21683,6 +21700,13 @@ S:	Supported
 F:	Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
 F:	drivers/phy/starfive/phy-jh7110-dphy-rx.c

+STARFIVE JH7110 DPHY TX DRIVER
+M:	Keith Zhao <keith.zhao@starfivetech.com>
+M:	Shengyang Chen <shengyang.chen@starfivetech.com>
+S:	Supported
+F:	Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-tx.yaml
+F:	drivers/phy/starfive/phy-jh7110-dphy-tx.c
+
 STARFIVE JH7110 MMC/SD/SDIO DRIVER
 M:	William Qiu <william.qiu@starfivetech.com>
 S:	Supported
@@ -21840,6 +21864,15 @@ F:	Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml
 F:	Documentation/devicetree/bindings/sound/st,stm32-*.yaml
 F:	sound/soc/stm/

+STM32 DMA DRIVERS
+M:	Amélie Delaunay <amelie.delaunay@foss.st.com>
+L:	dmaengine@vger.kernel.org
+L:	linux-stm32@st-md-mailman.stormreply.com (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/arch/arm/stm32/stm32-dma-mdma-chaining.rst
+F:	Documentation/devicetree/bindings/dma/stm32/
+F:	drivers/dma/stm32/
+
 STM32 TIMER/LPTIMER DRIVERS
 M:	Fabrice Gasnier <fabrice.gasnier@foss.st.com>
 S:	Maintained
@@ -816,10 +816,10 @@ EXPORT_SYMBOL(locomo_frontlight_set);
 *	We model this as a regular bus type, and hang devices directly
 *	off this.
 */
-static int locomo_match(struct device *_dev, struct device_driver *_drv)
+static int locomo_match(struct device *_dev, const struct device_driver *_drv)
 {
 	struct locomo_dev *dev = LOCOMO_DEV(_dev);
-	struct locomo_driver *drv = LOCOMO_DRV(_drv);
+	const struct locomo_driver *drv = LOCOMO_DRV(_drv);

 	return dev->devid == drv->devid;
 }
@@ -1339,10 +1339,10 @@ EXPORT_SYMBOL_GPL(sa1111_get_irq);
 *	We model this as a regular bus type, and hang devices directly
 *	off this.
 */
-static int sa1111_match(struct device *_dev, struct device_driver *_drv)
+static int sa1111_match(struct device *_dev, const struct device_driver *_drv)
 {
 	struct sa1111_dev *dev = to_sa1111_device(_dev);
-	struct sa1111_driver *drv = SA1111_DRV(_drv);
+	const struct sa1111_driver *drv = SA1111_DRV(_drv);

 	return !!(dev->devid & drv->devid);
 }
@@ -189,7 +189,7 @@ struct locomo_driver {
 	void (*remove)(struct locomo_dev *);
 };

-#define LOCOMO_DRV(_d)	container_of((_d), struct locomo_driver, drv)
+#define LOCOMO_DRV(_d)	container_of_const((_d), struct locomo_driver, drv)

 #define LOCOMO_DRIVER_NAME(_ldev) ((_ldev)->dev.driver->name)

@@ -404,7 +404,7 @@ struct sa1111_driver {
 	void (*remove)(struct sa1111_dev *);
 };

-#define SA1111_DRV(_d)	container_of((_d), struct sa1111_driver, drv)
+#define SA1111_DRV(_d)	container_of_const((_d), struct sa1111_driver, drv)

 #define SA1111_DRIVER_NAME(_sadev) ((_sadev)->dev.driver->name)

@@ -478,6 +478,7 @@ config MACH_LOONGSON64
 	select BOARD_SCACHE
 	select CSRC_R4K
 	select CEVT_R4K
+	select SYNC_R4K
 	select FORCE_PCI
 	select ISA
 	select I8259
@@ -240,6 +240,10 @@ GCR_ACCESSOR_RO(32, 0x0d0, gic_status)
 GCR_ACCESSOR_RO(32, 0x0f0, cpc_status)
 #define CM_GCR_CPC_STATUS_EX			BIT(0)

+/* GCR_ACCESS - Controls core/IOCU access to GCRs */
+GCR_ACCESSOR_RW(32, 0x120, access_cm3)
+#define CM_GCR_ACCESS_ACCESSEN			GENMASK(7, 0)
+
 /* GCR_L2_CONFIG - Indicates L2 cache configuration when Config5.L2C=1 */
 GCR_ACCESSOR_RW(32, 0x130, l2_config)
 #define CM_GCR_L2_CONFIG_BYPASS			BIT(20)
@@ -50,7 +50,6 @@ extern int __cpu_logical_map[NR_CPUS];
 #define SMP_CALL_FUNCTION	0x2
 /* Octeon - Tell another core to flush its icache */
 #define SMP_ICACHE_FLUSH	0x4
-#define SMP_ASK_C0COUNT		0x8

 /* Mask of CPUs which are currently definitely operating coherently */
 extern cpumask_t cpu_coherent_mask;
@@ -317,7 +317,10 @@ static void boot_core(unsigned int core, unsigned int vpe_id)
 	write_gcr_co_reset_ext_base(CM_GCR_Cx_RESET_EXT_BASE_UEB);

 	/* Ensure the core can access the GCRs */
-	set_gcr_access(1 << core);
+	if (mips_cm_revision() < CM_REV_CM3)
+		set_gcr_access(1 << core);
+	else
+		set_gcr_access_cm3(1 << core);

 	if (mips_cpc_present()) {
 		/* Reset the core */
@@ -33,7 +33,6 @@ static void __iomem *ipi_clear0_regs[16];
 static void __iomem *ipi_status0_regs[16];
 static void __iomem *ipi_en0_regs[16];
 static void __iomem *ipi_mailbox_buf[16];
-static uint32_t core0_c0count[NR_CPUS];

 static u32 (*ipi_read_clear)(int cpu);
 static void (*ipi_write_action)(int cpu, u32 action);
@@ -382,11 +381,10 @@ loongson3_send_ipi_mask(const struct cpumask *mask, unsigned int action)
 		ipi_write_action(cpu_logical_map(i), (u32)action);
 }

-
 static irqreturn_t loongson3_ipi_interrupt(int irq, void *dev_id)
 {
-	int i, cpu = smp_processor_id();
-	unsigned int action, c0count;
+	int cpu = smp_processor_id();
+	unsigned int action;

 	action = ipi_read_clear(cpu);

@@ -399,26 +397,14 @@ static irqreturn_t loongson3_ipi_interrupt(int irq, void *dev_id)
 		irq_exit();
 	}

-	if (action & SMP_ASK_C0COUNT) {
-		BUG_ON(cpu != 0);
-		c0count = read_c0_count();
-		c0count = c0count ? c0count : 1;
-		for (i = 1; i < nr_cpu_ids; i++)
-			core0_c0count[i] = c0count;
-		nudge_writes(); /* Let others see the result ASAP */
-	}
-
 	return IRQ_HANDLED;
 }

-#define MAX_LOOPS 800
 /*
 * SMP init and finish on secondary CPUs
 */
 static void loongson3_init_secondary(void)
 {
-	int i;
-	uint32_t initcount;
 	unsigned int cpu = smp_processor_id();
 	unsigned int imask = STATUSF_IP7 | STATUSF_IP6 |
 			     STATUSF_IP3 | STATUSF_IP2;
@@ -432,23 +418,6 @@ static void loongson3_init_secondary(void)
 		     cpu_logical_map(cpu) % loongson_sysconf.cores_per_package);
 	cpu_data[cpu].package =
 		cpu_logical_map(cpu) / loongson_sysconf.cores_per_package;
-
-	i = 0;
-	core0_c0count[cpu] = 0;
-	loongson3_send_ipi_single(0, SMP_ASK_C0COUNT);
-	while (!core0_c0count[cpu]) {
-		i++;
-		cpu_relax();
-	}
-
-	if (i > MAX_LOOPS)
-		i = MAX_LOOPS;
-	if (cpu_data[cpu].package)
-		initcount = core0_c0count[cpu] + i;
-	else /* Local access is faster for loops */
-		initcount = core0_c0count[cpu] + i/2;
-
-	write_c0_count(initcount);
 }

 static void loongson3_smp_finish(void)
@@ -589,4 +589,5 @@ module_exit(sbprof_tb_cleanup);

 MODULE_ALIAS_CHARDEV_MAJOR(SBPROF_TB_MAJOR);
 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
+MODULE_DESCRIPTION("Support for ZBbus profiling");
 MODULE_LICENSE("GPL");
@@ -46,6 +46,7 @@ config PARISC
 	select GENERIC_CPU_DEVICES if !SMP
 	select GENERIC_LIB_DEVMEM_IS_ALLOWED
 	select SYSCTL_ARCH_UNALIGN_ALLOW
+	select SYSCTL_ARCH_UNALIGN_NO_WARN
 	select SYSCTL_EXCEPTION_TRACE
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
@@ -86,6 +87,7 @@ config PARISC
 	select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
 	select TRACE_IRQFLAGS_SUPPORT
 	select HAVE_FUNCTION_DESCRIPTORS if 64BIT
+	select PCI_MSI_ARCH_FALLBACKS if PCI_MSI

 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
@@ -41,7 +41,7 @@ struct parisc_driver {


 #define to_parisc_device(d)	container_of(d, struct parisc_device, dev)
-#define to_parisc_driver(d)	container_of(d, struct parisc_driver, drv)
+#define to_parisc_driver(d)	container_of_const(d, struct parisc_driver, drv)
 #define parisc_parent(d)	to_parisc_device(d->dev.parent)

 static inline const char *parisc_pathname(struct parisc_device *d)
@@ -20,7 +20,7 @@
 * sysdeps/unix/sysv/linux/hppa/sysdep.h
 */

-#ifdef PIC
+#ifndef DONT_USE_PIC
 /* WARNING: CANNOT BE USED IN A NOP! */
 # define K_STW_ASM_PIC	"       copy %%r19, %%r4\n"
 # define K_LDW_ASM_PIC	"       copy %%r4, %%r19\n"
@@ -43,7 +43,7 @@
   across the syscall. */

 #define K_CALL_CLOB_REGS "%r1", "%r2", K_USING_GR4 \
-	        	 "%r20", "%r29", "%r31"
+			 "%r20", "%r29", "%r31"

 #undef K_INLINE_SYSCALL
 #define K_INLINE_SYSCALL(name, nr, args...)	({			\
@@ -58,7 +58,7 @@
 			"	ldi %1, %%r20\n"			\
 			K_LDW_ASM_PIC					\
 			: "=r" (__res)					\
-			: "i" (SYS_ify(name)) K_ASM_ARGS_##nr   	\
+			: "i" (name) K_ASM_ARGS_##nr			\
 			: "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr	\
 		);							\
 		__sys_res = (long)__res;				\
@@ -104,42 +104,18 @@
 #define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25"
 #define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26"

-#define _syscall0(type,name)						\
-type name(void)								\
-{									\
-    return K_INLINE_SYSCALL(name, 0);	                                \
-}
-
-#define _syscall1(type,name,type1,arg1)					\
-type name(type1 arg1)							\
-{									\
-    return K_INLINE_SYSCALL(name, 1, arg1);	                        \
-}
-
-#define _syscall2(type,name,type1,arg1,type2,arg2)			\
-type name(type1 arg1, type2 arg2)					\
-{									\
-    return K_INLINE_SYSCALL(name, 2, arg1, arg2);	                \
-}
-
-#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)		\
-type name(type1 arg1, type2 arg2, type3 arg3)				\
-{									\
-    return K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3);	                \
-}
-
-#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
-type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4)		\
-{									\
-    return K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4);	        \
-}
-
-/* select takes 5 arguments */
-#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
-type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)	\
-{									\
-    return K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5);	\
-}
+#define syscall0(name)						\
+	K_INLINE_SYSCALL(name, 0)
+#define syscall1(name, arg1)					\
+	K_INLINE_SYSCALL(name, 1, arg1)
+#define syscall2(name, arg1, arg2)				\
+	K_INLINE_SYSCALL(name, 2, arg1, arg2)
+#define syscall3(name, arg1, arg2, arg3)			\
+	K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3)
+#define syscall4(name, arg1, arg2, arg3, arg4)			\
+	K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4)
+#define syscall5(name, arg1, arg2, arg3, arg4, arg5)		\
+	K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5)

 #define __ARCH_WANT_NEW_STAT
 #define __ARCH_WANT_STAT64
@@ -19,6 +19,6 @@ extern struct vdso_data *vdso_data;
 /* Default link addresses for the vDSOs */
 #define VDSO_LBASE	0

-#define VDSO_VERSION_STRING	LINUX_5.18
+#define VDSO_VERSION_STRING	LINUX_6.11

 #endif /* __PARISC_VDSO_H__ */
@@ -611,11 +611,7 @@ void __init parisc_setup_cache_timing(void)
 		threshold/1024);

 set_tlb_threshold:
-	if (threshold > FLUSH_TLB_THRESHOLD)
-		parisc_tlb_flush_threshold = threshold;
-	else
-		parisc_tlb_flush_threshold = FLUSH_TLB_THRESHOLD;
-
+	parisc_tlb_flush_threshold = max(threshold, FLUSH_TLB_THRESHOLD);
 	printk(KERN_INFO "TLB flush threshold set to %lu KiB\n",
 		parisc_tlb_flush_threshold/1024);
 }
@@ -97,7 +97,7 @@ static int for_each_padev(int (*fn)(struct device *, void *), void * data)
 * @driver: the PA-RISC driver to try
 * @dev: the PA-RISC device to try
 */
-static int match_device(struct parisc_driver *driver, struct parisc_device *dev)
+static int match_device(const struct parisc_driver *driver, struct parisc_device *dev)
 {
 	const struct parisc_device_id *ids;

@@ -548,7 +548,7 @@ alloc_pa_dev(unsigned long hpa, struct hardware_path *mod_path)
 	return dev;
 }

-static int parisc_generic_match(struct device *dev, struct device_driver *drv)
+static int parisc_generic_match(struct device *dev, const struct device_driver *drv)
 {
 	return match_device(to_parisc_driver(drv), to_parisc_device(dev));
 }
@@ -104,6 +104,7 @@
 #define ERR_NOTHANDLED	-1

 int unaligned_enabled __read_mostly = 1;
+int no_unaligned_warning __read_mostly;

 static int emulate_ldh(struct pt_regs *regs, int toreg)
 {
@@ -399,6 +400,7 @@ void handle_unaligned(struct pt_regs *regs)
 	} else {
 		static DEFINE_RATELIMIT_STATE(kernel_ratelimit, 5 * HZ, 5);
 		if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
+			!no_unaligned_warning &&
 			__ratelimit(&kernel_ratelimit))
 			pr_warn("Kernel: unaligned access to " RFMT " in %pS "
 					"(iir " RFMT ")\n",
@@ -1,11 +1,25 @@
-# List of files in the vdso, has to be asm only for now
+# Include the generic Makefile to check the built vdso.
+include $(srctree)/lib/vdso/Makefile
+
+KCOV_INSTRUMENT := n
+
+# Disable gcov profiling, ubsan and kasan for VDSO code
+GCOV_PROFILE := n
+UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
+KCSAN_SANITIZE := n

 obj-vdso32 = note.o sigtramp.o restart_syscall.o
+obj-cvdso32 = vdso32_generic.o

 # Build rules

-targets := $(obj-vdso32) vdso32.so
+targets := $(obj-vdso32) $(obj-cvdso32) vdso32.so
 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
+obj-cvdso32 := $(addprefix $(obj)/, $(obj-cvdso32))
+
+VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_vdso32_generic.o = $(VDSO_CFLAGS_REMOVE)

 ccflags-y := -shared -fno-common -fbuiltin -mno-fast-indirect-calls -O2 -mno-long-calls
 #  -march=1.1 -mschedule=7100LC
@@ -26,18 +40,22 @@ $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so FORCE

 # Force dependency (incbin is bad)
 # link rule for the .so file, .lds has to be first
-$(obj)/vdso32.so: $(obj)/vdso32.lds $(obj-vdso32) $(VDSO_LIBGCC) FORCE
+$(obj)/vdso32.so: $(obj)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC) FORCE
 	$(call if_changed,vdso32ld)

 # assembly rules for the .S files
 $(obj-vdso32): %.o: %.S FORCE
 	$(call if_changed_dep,vdso32as)
+$(obj-cvdso32): %.o: %.c FORCE
+	$(call if_changed_dep,vdso32cc)

 # actual build commands
 quiet_cmd_vdso32ld = VDSO32L $@
      cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@
 quiet_cmd_vdso32as = VDSO32A $@
      cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $<
+quiet_cmd_vdso32cc = VDSO32C $@
+      cmd_vdso32cc = $(CROSS32CC) $(c_flags) -c -o $@ $<

 # Generate VDSO offsets using helper script
 gen-vdsosym := $(src)/gen_vdso_offsets.sh
@@ -106,6 +106,9 @@ VERSION
    global:
 	__kernel_sigtramp_rt32;
 	__kernel_restart_syscall32;
+	__vdso_gettimeofday;
+	__vdso_clock_gettime;
+	__vdso_clock_gettime64;
    local: *;
  };
 }
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "asm/unistd.h"
+#include <linux/types.h>
+#include <uapi/asm/unistd_32.h>
+
+struct timezone;
+struct old_timespec32;
+struct __kernel_timespec;
+struct __kernel_old_timeval;
+
+/* forward declarations */
+int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
+int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts);
+int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts);
+
+
+int __vdso_gettimeofday(struct __kernel_old_timeval *tv,
+			struct timezone *tz)
+{
+	return syscall2(__NR_gettimeofday, (long)tv, (long)tz);
+}
+
+int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts)
+{
+	return syscall2(__NR_clock_gettime, (long)clock, (long)ts);
+}
+
+int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts)
+{
+	return syscall2(__NR_clock_gettime64, (long)clock, (long)ts);
+}
@@ -1,12 +1,25 @@
-# List of files in the vdso, has to be asm only for now
+# Include the generic Makefile to check the built vdso.
+include $(srctree)/lib/vdso/Makefile
+
+KCOV_INSTRUMENT := n
+
+# Disable gcov profiling, ubsan and kasan for VDSO code
+GCOV_PROFILE := n
+UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
+KCSAN_SANITIZE := n

 obj-vdso64 = note.o sigtramp.o restart_syscall.o
+obj-cvdso64 = vdso64_generic.o

 # Build rules

-targets := $(obj-vdso64) vdso64.so
-obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
+targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so
+obj-vdso64  := $(addprefix $(obj)/, $(obj-vdso64))
+obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64))

+VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_vdso64_generic.o = $(VDSO_CFLAGS_REMOVE)

 ccflags-y := -shared -fno-common -fno-builtin
 ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
@@ -26,18 +39,22 @@ $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE

 # Force dependency (incbin is bad)
 # link rule for the .so file, .lds has to be first
-$(obj)/vdso64.so: $(obj)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC) FORCE
+$(obj)/vdso64.so: $(obj)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) $(VDSO_LIBGCC) FORCE
 	$(call if_changed,vdso64ld)

 # assembly rules for the .S files
 $(obj-vdso64): %.o: %.S FORCE
 	$(call if_changed_dep,vdso64as)
+$(obj-cvdso64): %.o: %.c FORCE
+	$(call if_changed_dep,vdso64cc)

 # actual build commands
 quiet_cmd_vdso64ld = VDSO64L $@
      cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@
 quiet_cmd_vdso64as = VDSO64A $@
      cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
+quiet_cmd_vdso64cc = VDSO64C $@
+      cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<

 # Generate VDSO offsets using helper script
 gen-vdsosym := $(src)/gen_vdso_offsets.sh
@@ -104,6 +104,8 @@ VERSION
    global:
 	__kernel_sigtramp_rt64;
 	__kernel_restart_syscall64;
+	__vdso_gettimeofday;
+	__vdso_clock_gettime;
    local: *;
  };
 }
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "asm/unistd.h"
+#include <linux/types.h>
+
+struct timezone;
+struct __kernel_timespec;
+struct __kernel_old_timeval;
+
+/* forward declarations */
+int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
+int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
+
+
+int __vdso_gettimeofday(struct __kernel_old_timeval *tv,
+			struct timezone *tz)
+{
+	return syscall2(__NR_gettimeofday, (long)tv, (long)tz);
+}
+
+int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)
+{
+	return syscall2(__NR_clock_gettime, (long)clock, (long)ts);
+}
@@ -390,11 +390,7 @@ int ps3_system_bus_device_register(struct ps3_system_bus_device *dev);
 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv);
 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv);

-static inline struct ps3_system_bus_driver *ps3_drv_to_system_bus_drv(
-	struct device_driver *_drv)
-{
-	return container_of(_drv, struct ps3_system_bus_driver, core);
-}
+#define ps3_drv_to_system_bus_drv(_drv) container_of_const(_drv, struct ps3_system_bus_driver, core)
 static inline struct ps3_system_bus_device *ps3_dev_to_system_bus_dev(
 	const struct device *_dev)
 {
@@ -156,11 +156,7 @@ static inline int vio_enable_interrupts(struct vio_dev *dev)
 }
 #endif

-static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
-{
-	return container_of(drv, struct vio_driver, driver);
-}
-
+#define to_vio_driver(__drv)	container_of_const(__drv, struct vio_driver, driver)
 #define to_vio_dev(__dev)	container_of_const(__dev, struct vio_dev, dev)

 #endif /* __KERNEL__ */
@@ -333,10 +333,10 @@ int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);

 static int ps3_system_bus_match(struct device *_dev,
-	struct device_driver *_drv)
+	const struct device_driver *_drv)
 {
 	int result;
-	struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
+	const struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
 	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);

 	if (!dev->match_sub_id)
@@ -339,7 +339,7 @@ static struct attribute *ibmbus_bus_attrs[] = {
 };
 ATTRIBUTE_GROUPS(ibmbus_bus);

-static int ibmebus_bus_bus_match(struct device *dev, struct device_driver *drv)
+static int ibmebus_bus_bus_match(struct device *dev, const struct device_driver *drv)
 {
 	const struct of_device_id *matches = drv->of_match_table;

@@ -1576,10 +1576,10 @@ void vio_unregister_device(struct vio_dev *viodev)
 }
 EXPORT_SYMBOL(vio_unregister_device);

-static int vio_bus_match(struct device *dev, struct device_driver *drv)
+static int vio_bus_match(struct device *dev, const struct device_driver *drv)
 {
 	const struct vio_dev *vio_dev = to_vio_dev(dev);
-	struct vio_driver *vio_drv = to_vio_driver(drv);
+	const struct vio_driver *vio_drv = to_vio_driver(drv);
 	const struct vio_device_id *ids = vio_drv->id_table;

 	return (ids != NULL) && (vio_match_device(ids, vio_dev) != NULL);
@@ -1689,7 +1689,7 @@ struct vio_dev *vio_find_node(struct device_node *vnode)
 	/* construct the kobject name from the device node */
 	if (of_node_is_type(vnode_parent, "vdevice")) {
 		const __be32 *prop;
-		
+
 		prop = of_get_property(vnode, "reg", NULL);
 		if (!prop)
 			goto out;
@@ -210,7 +210,7 @@ extern void ccw_device_get_id(struct ccw_device *, struct ccw_dev_id *);
 #define get_ccwdev_lock(x) (x)->ccwlock

 #define to_ccwdev(n) container_of(n, struct ccw_device, dev)
-#define to_ccwdrv(n) container_of(n, struct ccw_driver, driver)
+#define to_ccwdrv(n) container_of_const(n, struct ccw_driver, driver)

 extern struct ccw_device *ccw_device_create_console(struct ccw_driver *);
 extern void ccw_device_destroy_console(struct ccw_device *);
@@ -483,11 +483,7 @@ int __vio_register_driver(struct vio_driver *drv, struct module *owner,
 	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 void vio_unregister_driver(struct vio_driver *drv);

-static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
-{
-	return container_of(drv, struct vio_driver, driver);
-}
-
+#define to_vio_driver(__drv)	container_of_const(__drv, struct vio_driver, driver)
 #define to_vio_dev(__dev)	container_of_const(__dev, struct vio_dev, dev)

 int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
@@ -54,10 +54,10 @@ static int vio_hotplug(const struct device *dev, struct kobj_uevent_env *env)
 	return 0;
 }

-static int vio_bus_match(struct device *dev, struct device_driver *drv)
+static int vio_bus_match(struct device *dev, const struct device_driver *drv)
 {
 	struct vio_dev *vio_dev = to_vio_dev(dev);
-	struct vio_driver *vio_drv = to_vio_driver(drv);
+	const struct vio_driver *vio_drv = to_vio_driver(drv);
 	const struct vio_device_id *matches = vio_drv->id_table;

 	if (!matches)
@@ -11,7 +11,7 @@ config UML
 	select ARCH_HAS_KCOV
 	select ARCH_HAS_STRNCPY_FROM_USER
 	select ARCH_HAS_STRNLEN_USER
-	select ARCH_NO_PREEMPT
+	select ARCH_NO_PREEMPT_DYNAMIC
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_KASAN if X86_64
 	select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN
@@ -31,7 +31,8 @@ config UML
 	select TRACE_IRQFLAGS_SUPPORT
 	select TTY # Needed for line.c
 	select HAVE_ARCH_VMAP_STACK
-	select HAVE_RUST			if X86_64
+	select HAVE_RUST
+	select ARCH_HAS_UBSAN

 config MMU
 	bool
@@ -48,12 +49,13 @@ config NO_IOMEM
 config UML_IOMEM_EMULATION
 	bool
 	select INDIRECT_IOMEM
+	select HAS_IOPORT
 	select GENERIC_PCI_IOMAP
 	select GENERIC_IOMAP
 	select NO_GENERIC_PCI_IOPORT_MAP

 config NO_IOPORT_MAP
-	def_bool y
+	def_bool !UML_IOMEM_EMULATION

 config ISA
 	bool
@@ -297,26 +297,6 @@ config UML_NET_MCAST

 	  If unsure, say N.

-config UML_NET_PCAP
-	bool "pcap transport (obsolete)"
-	depends on UML_NET
-	depends on !MODVERSIONS
-	select MAY_HAVE_RUNTIME_DEPS
-	help
-	  The pcap transport makes a pcap packet stream on the host look
-	  like an ethernet device inside UML.  This is useful for making
-	  UML act as a network monitor for the host.  You must have libcap
-	  installed in order to build the pcap transport into UML.
-
-	  For more information, see
-	  <http://user-mode-linux.sourceforge.net/old/networking.html>  That site
-	  has examples of the UML command line to use to enable this option.
-
-	  NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
-	  migrate to UML_NET_VECTOR.
-
-	  If unsure, say N.
-
 config UML_NET_SLIRP
 	bool "SLiRP transport (obsolete)"
 	depends on UML_NET
@@ -20,14 +20,9 @@ harddog-objs := harddog_kern.o
 harddog-builtin-$(CONFIG_UML_WATCHDOG) := harddog_user.o harddog_user_exp.o
 rtc-objs := rtc_kern.o rtc_user.o

-LDFLAGS_pcap.o = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
-
 LDFLAGS_vde.o = $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)

-targets := pcap_kern.o pcap_user.o vde_kern.o vde_user.o
-
-$(obj)/pcap.o: $(obj)/pcap_kern.o $(obj)/pcap_user.o
-	$(LD) -r -dp -o $@ $^ $(ld_flags)
+targets := vde_kern.o vde_user.o

 $(obj)/vde.o: $(obj)/vde_kern.o $(obj)/vde_user.o
 	$(LD) -r -dp -o $@ $^ $(ld_flags)
@@ -49,7 +44,6 @@ obj-$(CONFIG_UML_NET_DAEMON) += daemon.o
 obj-$(CONFIG_UML_NET_VECTOR) += vector.o
 obj-$(CONFIG_UML_NET_VDE) += vde.o
 obj-$(CONFIG_UML_NET_MCAST) += umcast.o
-obj-$(CONFIG_UML_NET_PCAP) += pcap.o
 obj-$(CONFIG_UML_NET) += net.o 
 obj-$(CONFIG_MCONSOLE) += mconsole.o
 obj-$(CONFIG_MMAPPER) += mmapper_kern.o 
@@ -69,7 +63,7 @@ obj-$(CONFIG_UML_RTC) += rtc.o
 obj-$(CONFIG_UML_PCI_OVER_VIRTIO) += virt-pci.o

 # pcap_user.o must be added explicitly.
-USER_OBJS := fd.o null.o pty.o tty.o xterm.o slip_common.o pcap_user.o vde_user.o vector_user.o
+USER_OBJS := fd.o null.o pty.o tty.o xterm.o slip_common.o vde_user.o vector_user.o
 CFLAGS_null.o = -DDEV_NULL=$(DEV_NULL_PATH)

 CFLAGS_xterm.o += '-DCONFIG_XTERM_CHAN_DEFAULT_EMULATOR="$(CONFIG_XTERM_CHAN_DEFAULT_EMULATOR)"'
@@ -22,7 +22,8 @@ struct chan {
 	unsigned int output:1;
 	unsigned int opened:1;
 	unsigned int enabled:1;
-	int fd;
+	int fd_in;
+	int fd_out; /* only different to fd_in if blocking output is needed */
 	const struct chan_ops *ops;
 	void *data;
 };
@@ -81,6 +81,12 @@ static const struct chan_ops not_configged_ops = {
 };
 #endif /* CONFIG_NOCONFIG_CHAN */

+static inline bool need_output_blocking(void)
+{
+	return time_travel_mode == TT_MODE_INFCPU ||
+	       time_travel_mode == TT_MODE_EXTERNAL;
+}
+
 static int open_one_chan(struct chan *chan)
 {
 	int fd, err;
@@ -96,15 +102,43 @@ static int open_one_chan(struct chan *chan)
 		return fd;

 	err = os_set_fd_block(fd, 0);
-	if (err) {
-		(*chan->ops->close)(fd, chan->data);
-		return err;
-	}
+	if (err)
+		goto out_close;

-	chan->fd = fd;
+	chan->fd_in = fd;
+	chan->fd_out = fd;
+
+	/*
+	 * In time-travel modes infinite-CPU and external we need to guarantee
+	 * that any writes to the output succeed immdiately from the point of
+	 * the VM. The best way to do this is to put the FD in blocking mode
+	 * and simply wait/retry until everything is written.
+	 * As every write is guaranteed to complete, we also do not need to
+	 * request an IRQ for the output.
+	 *
+	 * Note that input cannot happen in a time synchronized way. We permit
+	 * it, but time passes very quickly if anything waits for a read.
+	 */
+	if (chan->output && need_output_blocking()) {
+		err = os_dup_file(chan->fd_out);
+		if (err < 0)
+			goto out_close;
+
+		chan->fd_out = err;
+
+		err = os_set_fd_block(chan->fd_out, 1);
+		if (err) {
+			os_close_file(chan->fd_out);
+			goto out_close;
+		}
+	}

 	chan->opened = 1;
 	return 0;
+
+out_close:
+	(*chan->ops->close)(fd, chan->data);
+	return err;
 }

 static int open_chan(struct list_head *chans)
@@ -125,7 +159,7 @@ static int open_chan(struct list_head *chans)
 void chan_enable_winch(struct chan *chan, struct tty_port *port)
 {
 	if (chan && chan->primary && chan->ops->winch)
-		register_winch(chan->fd, port);
+		register_winch(chan->fd_in, port);
 }

 static void line_timer_cb(struct work_struct *work)
@@ -156,8 +190,9 @@ int enable_chan(struct line *line)

 		if (chan->enabled)
 			continue;
-		err = line_setup_irq(chan->fd, chan->input, chan->output, line,
-				     chan);
+		err = line_setup_irq(chan->fd_in, chan->input,
+				     chan->output && !need_output_blocking(),
+				     line, chan);
 		if (err)
 			goto out_close;

@@ -196,7 +231,8 @@ void free_irqs(void)

 		if (chan->input && chan->enabled)
 			um_free_irq(chan->line->read_irq, chan);
-		if (chan->output && chan->enabled)
+		if (chan->output && chan->enabled &&
+		    !need_output_blocking())
 			um_free_irq(chan->line->write_irq, chan);
 		chan->enabled = 0;
 	}
@@ -216,15 +252,19 @@ static void close_one_chan(struct chan *chan, int delay_free_irq)
 	} else {
 		if (chan->input && chan->enabled)
 			um_free_irq(chan->line->read_irq, chan);
-		if (chan->output && chan->enabled)
+		if (chan->output && chan->enabled &&
+		    !need_output_blocking())
 			um_free_irq(chan->line->write_irq, chan);
 		chan->enabled = 0;
 	}
+	if (chan->fd_out != chan->fd_in)
+		os_close_file(chan->fd_out);
 	if (chan->ops->close != NULL)
-		(*chan->ops->close)(chan->fd, chan->data);
+		(*chan->ops->close)(chan->fd_in, chan->data);

 	chan->opened = 0;
-	chan->fd = -1;
+	chan->fd_in = -1;
+	chan->fd_out = -1;
 }

 void close_chan(struct line *line)
@@ -244,7 +284,7 @@ void close_chan(struct line *line)
 void deactivate_chan(struct chan *chan, int irq)
 {
 	if (chan && chan->enabled)
-		deactivate_fd(chan->fd, irq);
+		deactivate_fd(chan->fd_in, irq);
 }

 int write_chan(struct chan *chan, const u8 *buf, size_t len, int write_irq)
@@ -254,7 +294,7 @@ int write_chan(struct chan *chan, const u8 *buf, size_t len, int write_irq)
 	if (len == 0 || !chan || !chan->ops->write)
 		return 0;

-	n = chan->ops->write(chan->fd, buf, len, chan->data);
+	n = chan->ops->write(chan->fd_out, buf, len, chan->data);
 	if (chan->primary) {
 		ret = n;
 	}
@@ -268,7 +308,7 @@ int console_write_chan(struct chan *chan, const char *buf, int len)
 	if (!chan || !chan->ops->console_write)
 		return 0;

-	n = chan->ops->console_write(chan->fd, buf, len);
+	n = chan->ops->console_write(chan->fd_out, buf, len);
 	if (chan->primary)
 		ret = n;
 	return ret;
@@ -296,14 +336,14 @@ int chan_window_size(struct line *line, unsigned short *rows_out,
 	if (chan && chan->primary) {
 		if (chan->ops->window_size == NULL)
 			return 0;
-		return chan->ops->window_size(chan->fd, chan->data,
+		return chan->ops->window_size(chan->fd_in, chan->data,
 					      rows_out, cols_out);
 	}
 	chan = line->chan_out;
 	if (chan && chan->primary) {
 		if (chan->ops->window_size == NULL)
 			return 0;
-		return chan->ops->window_size(chan->fd, chan->data,
+		return chan->ops->window_size(chan->fd_in, chan->data,
 					      rows_out, cols_out);
 	}
 	return 0;
@@ -319,7 +359,7 @@ static void free_one_chan(struct chan *chan)
 		(*chan->ops->free)(chan->data);

 	if (chan->primary && chan->output)
-		ignore_sigio_fd(chan->fd);
+		ignore_sigio_fd(chan->fd_in);
 	kfree(chan);
 }

@@ -478,7 +518,8 @@ static struct chan *parse_chan(struct line *line, char *str, int device,
 				 .output 	= 0,
 				 .opened  	= 0,
 				 .enabled  	= 0,
-				 .fd 		= -1,
+				 .fd_in		= -1,
+				 .fd_out	= -1,
 				 .ops 		= ops,
 				 .data 		= data });
 	return chan;
@@ -549,7 +590,7 @@ void chan_interrupt(struct line *line, int irq)
 			schedule_delayed_work(&line->task, 1);
 			goto out;
 		}
-		err = chan->ops->read(chan->fd, &c, chan->data);
+		err = chan->ops->read(chan->fd_in, &c, chan->data);
 		if (err > 0)
 			tty_insert_flip_char(port, c, TTY_NORMAL);
 	} while (err > 0);
@@ -23,7 +23,7 @@ int generic_read(int fd, __u8 *c_out, void *unused)
 {
 	int n;

-	n = read(fd, c_out, sizeof(*c_out));
+	CATCH_EINTR(n = read(fd, c_out, sizeof(*c_out)));
 	if (n > 0)
 		return n;
 	else if (n == 0)
@@ -37,11 +37,23 @@ int generic_read(int fd, __u8 *c_out, void *unused)

 int generic_write(int fd, const __u8 *buf, size_t n, void *unused)
 {
+	int written = 0;
 	int err;

-	err = write(fd, buf, n);
-	if (err > 0)
-		return err;
+	/* The FD may be in blocking mode, as such, need to retry short writes,
+	 * they may have been interrupted by a signal.
+	 */
+	do {
+		errno = 0;
+		err = write(fd, buf + written, n - written);
+		if (err > 0) {
+			written += err;
+			continue;
+		}
+	} while (err < 0 && errno == EINTR);
+
+	if (written > 0)
+		return written;
 	else if (errno == EAGAIN)
 		return 0;
 	else if (err == 0)
@@ -49,6 +49,7 @@
 #include "mconsole.h"
 #include "harddog.h"

+MODULE_DESCRIPTION("UML hardware watchdog");
 MODULE_LICENSE("GPL");

 static DEFINE_MUTEX(harddog_mutex);
@@ -383,6 +383,7 @@ int setup_one_line(struct line *lines, int n, char *init,
 			parse_chan_pair(NULL, line, n, opts, error_out);
 			err = 0;
 		}
+		*error_out = "configured as 'none'";
 	} else {
 		char *new = kstrdup(init, GFP_KERNEL);
 		if (!new) {
@@ -406,6 +407,7 @@ int setup_one_line(struct line *lines, int n, char *init,
 			}
 		}
 		if (err) {
+			*error_out = "failed to parse channel pair";
 			line->init_str = NULL;
 			line->valid = 0;
 			kfree(new);
@@ -1,113 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- */
-
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <net_kern.h>
-#include "pcap_user.h"
-
-struct pcap_init {
-	char *host_if;
-	int promisc;
-	int optimize;
-	char *filter;
-};
-
-static void pcap_init_kern(struct net_device *dev, void *data)
-{
-	struct uml_net_private *pri;
-	struct pcap_data *ppri;
-	struct pcap_init *init = data;
-
-	pri = netdev_priv(dev);
-	ppri = (struct pcap_data *) pri->user;
-	ppri->host_if = init->host_if;
-	ppri->promisc = init->promisc;
-	ppri->optimize = init->optimize;
-	ppri->filter = init->filter;
-
-	printk("pcap backend, host interface %s\n", ppri->host_if);
-}
-
-static int pcap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
-{
-	return pcap_user_read(fd, skb_mac_header(skb),
-			      skb->dev->mtu + ETH_HEADER_OTHER,
-			      (struct pcap_data *) &lp->user);
-}
-
-static int pcap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
-{
-	return -EPERM;
-}
-
-static const struct net_kern_info pcap_kern_info = {
-	.init			= pcap_init_kern,
-	.protocol		= eth_protocol,
-	.read			= pcap_read,
-	.write			= pcap_write,
-};
-
-static int pcap_setup(char *str, char **mac_out, void *data)
-{
-	struct pcap_init *init = data;
-	char *remain, *host_if = NULL, *options[2] = { NULL, NULL };
-	int i;
-
-	*init = ((struct pcap_init)
-		{ .host_if 	= "eth0",
-		  .promisc 	= 1,
-		  .optimize 	= 0,
-		  .filter 	= NULL });
-
-	remain = split_if_spec(str, &host_if, &init->filter,
-			       &options[0], &options[1], mac_out, NULL);
-	if (remain != NULL) {
-		printk(KERN_ERR "pcap_setup - Extra garbage on "
-		       "specification : '%s'\n", remain);
-		return 0;
-	}
-
-	if (host_if != NULL)
-		init->host_if = host_if;
-
-	for (i = 0; i < ARRAY_SIZE(options); i++) {
-		if (options[i] == NULL)
-			continue;
-		if (!strcmp(options[i], "promisc"))
-			init->promisc = 1;
-		else if (!strcmp(options[i], "nopromisc"))
-			init->promisc = 0;
-		else if (!strcmp(options[i], "optimize"))
-			init->optimize = 1;
-		else if (!strcmp(options[i], "nooptimize"))
-			init->optimize = 0;
-		else {
-			printk(KERN_ERR "pcap_setup : bad option - '%s'\n",
-			       options[i]);
-			return 0;
-		}
-	}
-
-	return 1;
-}
-
-static struct transport pcap_transport = {
-	.list 		= LIST_HEAD_INIT(pcap_transport.list),
-	.name 		= "pcap",
-	.setup  	= pcap_setup,
-	.user 		= &pcap_user_info,
-	.kern 		= &pcap_kern_info,
-	.private_size 	= sizeof(struct pcap_data),
-	.setup_size 	= sizeof(struct pcap_init),
-};
-
-static int register_pcap(void)
-{
-	register_transport(&pcap_transport);
-	return 0;
-}
-
-late_initcall(register_pcap);
@@ -1,137 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- */
-
-#include <errno.h>
-#include <pcap.h>
-#include <string.h>
-#include <asm/types.h>
-#include <net_user.h>
-#include "pcap_user.h"
-#include <um_malloc.h>
-
-#define PCAP_FD(p) (*(int *)(p))
-
-static int pcap_user_init(void *data, void *dev)
-{
-	struct pcap_data *pri = data;
-	pcap_t *p;
-	char errors[PCAP_ERRBUF_SIZE];
-
-	p = pcap_open_live(pri->host_if, ETH_MAX_PACKET + ETH_HEADER_OTHER,
-			   pri->promisc, 0, errors);
-	if (p == NULL) {
-		printk(UM_KERN_ERR "pcap_user_init : pcap_open_live failed - "
-		       "'%s'\n", errors);
-		return -EINVAL;
-	}
-
-	pri->dev = dev;
-	pri->pcap = p;
-	return 0;
-}
-
-static int pcap_user_open(void *data)
-{
-	struct pcap_data *pri = data;
-	__u32 netmask;
-	int err;
-
-	if (pri->pcap == NULL)
-		return -ENODEV;
-
-	if (pri->filter != NULL) {
-		err = dev_netmask(pri->dev, &netmask);
-		if (err < 0) {
-			printk(UM_KERN_ERR "pcap_user_open : dev_netmask failed\n");
-			return -EIO;
-		}
-
-		pri->compiled = uml_kmalloc(sizeof(struct bpf_program),
-					UM_GFP_KERNEL);
-		if (pri->compiled == NULL) {
-			printk(UM_KERN_ERR "pcap_user_open : kmalloc failed\n");
-			return -ENOMEM;
-		}
-
-		err = pcap_compile(pri->pcap,
-				   (struct bpf_program *) pri->compiled,
-				   pri->filter, pri->optimize, netmask);
-		if (err < 0) {
-			printk(UM_KERN_ERR "pcap_user_open : pcap_compile failed - "
-			       "'%s'\n", pcap_geterr(pri->pcap));
-			goto out;
-		}
-
-		err = pcap_setfilter(pri->pcap, pri->compiled);
-		if (err < 0) {
-			printk(UM_KERN_ERR "pcap_user_open : pcap_setfilter "
-			       "failed - '%s'\n", pcap_geterr(pri->pcap));
-			goto out;
-		}
-	}
-
-	return PCAP_FD(pri->pcap);
-
- out:
-	kfree(pri->compiled);
-	return -EIO;
-}
-
-static void pcap_remove(void *data)
-{
-	struct pcap_data *pri = data;
-
-	if (pri->compiled != NULL)
-		pcap_freecode(pri->compiled);
-
-	if (pri->pcap != NULL)
-		pcap_close(pri->pcap);
-}
-
-struct pcap_handler_data {
-	char *buffer;
-	int len;
-};
-
-static void handler(u_char *data, const struct pcap_pkthdr *header,
-		    const u_char *packet)
-{
-	int len;
-
-	struct pcap_handler_data *hdata = (struct pcap_handler_data *) data;
-
-	len = hdata->len < header->caplen ? hdata->len : header->caplen;
-	memcpy(hdata->buffer, packet, len);
-	hdata->len = len;
-}
-
-int pcap_user_read(int fd, void *buffer, int len, struct pcap_data *pri)
-{
-	struct pcap_handler_data hdata = ((struct pcap_handler_data)
-		                          { .buffer  	= buffer,
-					    .len 	= len });
-	int n;
-
-	n = pcap_dispatch(pri->pcap, 1, handler, (u_char *) &hdata);
-	if (n < 0) {
-		printk(UM_KERN_ERR "pcap_dispatch failed - %s\n",
-		       pcap_geterr(pri->pcap));
-		return -EIO;
-	}
-	else if (n == 0)
-		return 0;
-	return hdata.len;
-}
-
-const struct net_user_info pcap_user_info = {
-	.init		= pcap_user_init,
-	.open		= pcap_user_open,
-	.close	 	= NULL,
-	.remove	 	= pcap_remove,
-	.add_address	= NULL,
-	.delete_address = NULL,
-	.mtu		= ETH_MAX_PACKET,
-	.max_packet	= ETH_MAX_PACKET + ETH_HEADER_OTHER,
-};
@@ -1,21 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- */
-
-#include <net_user.h>
-
-struct pcap_data {
-	char *host_if;
-	int promisc;
-	int optimize;
-	char *filter;
-	void *compiled;
-	void *pcap;
-	void *dev;
-};
-
-extern const struct net_user_info pcap_user_info;
-
-extern int pcap_user_read(int fd, void *buf, int len, struct pcap_data *pri);
-
@@ -45,15 +45,17 @@ struct connection {
 static irqreturn_t pipe_interrupt(int irq, void *data)
 {
 	struct connection *conn = data;
-	int fd;
+	int n_fds = 1, fd = -1;
+	ssize_t ret;

-	fd = os_rcv_fd(conn->socket[0], &conn->helper_pid);
-	if (fd < 0) {
-		if (fd == -EAGAIN)
+	ret = os_rcv_fd_msg(conn->socket[0], &fd, n_fds, &conn->helper_pid,
+			    sizeof(conn->helper_pid));
+	if (ret != sizeof(conn->helper_pid)) {
+		if (ret == -EAGAIN)
 			return IRQ_NONE;

-		printk(KERN_ERR "pipe_interrupt : os_rcv_fd returned %d\n",
-		       -fd);
+		printk(KERN_ERR "pipe_interrupt : os_rcv_fd_msg returned %zd\n",
+		       ret);
 		os_close_file(conn->fd);
 	}

@@ -36,7 +36,6 @@
 #include <linux/vmalloc.h>
 #include <linux/platform_device.h>
 #include <linux/scatterlist.h>
-#include <asm/tlbflush.h>
 #include <kern_util.h>
 #include "mconsole_kern.h"
 #include <init.h>
@@ -106,7 +105,6 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data)
 #define DRIVER_NAME "uml-blkdev"

 static DEFINE_MUTEX(ubd_lock);
-static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */

 static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg);
@@ -759,7 +757,6 @@ static int ubd_open_dev(struct ubd *ubd_dev)
 			printk(KERN_ERR "Failed to vmalloc COW bitmap\n");
 			goto error;
 		}
-		flush_tlb_kernel_vm();

 		err = read_cow_bitmap(ubd_dev->fd, ubd_dev->cow.bitmap,
 				      ubd_dev->cow.bitmap_offset,
@@ -1115,11 +1115,12 @@ static int irq_rr;
 static int vector_net_close(struct net_device *dev)
 {
 	struct vector_private *vp = netdev_priv(dev);
-	unsigned long flags;

 	netif_stop_queue(dev);
 	del_timer(&vp->tl);

+	vp->opened = false;
+
 	if (vp->fds == NULL)
 		return 0;

@@ -1158,10 +1159,7 @@ static int vector_net_close(struct net_device *dev)
 		destroy_queue(vp->tx_queue);
 	kfree(vp->fds);
 	vp->fds = NULL;
-	spin_lock_irqsave(&vp->lock, flags);
-	vp->opened = false;
 	vp->in_error = false;
-	spin_unlock_irqrestore(&vp->lock, flags);
 	return 0;
 }

@@ -1203,17 +1201,12 @@ static void vector_reset_tx(struct work_struct *work)
 static int vector_net_open(struct net_device *dev)
 {
 	struct vector_private *vp = netdev_priv(dev);
-	unsigned long flags;
 	int err = -EINVAL;
 	struct vector_device *vdevice;

-	spin_lock_irqsave(&vp->lock, flags);
-	if (vp->opened) {
-		spin_unlock_irqrestore(&vp->lock, flags);
+	if (vp->opened)
 		return -ENXIO;
-	}
 	vp->opened = true;
-	spin_unlock_irqrestore(&vp->lock, flags);

 	vp->bpf = uml_vector_user_bpf(get_bpf_file(vp->parsed));

@@ -1387,8 +1380,6 @@ static int vector_net_load_bpf_flash(struct net_device *dev,
 		return -1;
 	}

-	spin_lock(&vp->lock);
-
 	if (vp->bpf != NULL) {
 		if (vp->opened)
 			uml_vector_detach_bpf(vp->fds->rx_fd, vp->bpf);
@@ -1417,15 +1408,12 @@ static int vector_net_load_bpf_flash(struct net_device *dev,
 	if (vp->opened)
 		result = uml_vector_attach_bpf(vp->fds->rx_fd, vp->bpf);

-	spin_unlock(&vp->lock);
-
 	return result;

 free_buffer:
 	release_firmware(fw);

 flash_fail:
-	spin_unlock(&vp->lock);
 	if (vp->bpf != NULL)
 		kfree(vp->bpf->filter);
 	kfree(vp->bpf);
@@ -1631,7 +1619,6 @@ static void vector_eth_configure(
 	INIT_WORK(&vp->reset_tx, vector_reset_tx);

 	timer_setup(&vp->tl, vector_timer_expire, 0);
-	spin_lock_init(&vp->lock);

 	/* FIXME */
 	dev->netdev_ops = &vector_netdev_ops;
@@ -71,7 +71,6 @@ struct vector_estats {

 struct vector_private {
 	struct list_head list;
-	spinlock_t lock;
 	struct net_device *dev;
 	struct napi_struct		napi	____cacheline_aligned;

@@ -156,7 +156,7 @@ static int xterm_open(int input, int output, int primary, void *d,
 	new = xterm_fd(fd, &data->helper_pid);
 	if (new < 0) {
 		err = new;
-		printk(UM_KERN_ERR "xterm_open : os_rcv_fd failed, err = %d\n",
+		printk(UM_KERN_ERR "xterm_open : xterm_fd failed, err = %d\n",
 		       -err);
 		goto out_kill;
 	}
@@ -21,12 +21,19 @@ struct xterm_wait {
 static irqreturn_t xterm_interrupt(int irq, void *data)
 {
 	struct xterm_wait *xterm = data;
-	int fd;
+	int fd = -1, n_fds = 1;
+	ssize_t ret;

-	fd = os_rcv_fd(xterm->fd, &xterm->pid);
-	if (fd == -EAGAIN)
+	ret = os_rcv_fd_msg(xterm->fd, &fd, n_fds,
+			    &xterm->pid, sizeof(xterm->pid));
+	if (ret == -EAGAIN)
 		return IRQ_NONE;

+	if (ret < 0)
+		fd = ret;
+	else if (ret != sizeof(xterm->pid))
+		fd = -EMSGSIZE;
+
 	xterm->new_fd = fd;
 	complete(&xterm->ready);

@@ -7,15 +7,13 @@
 #define __ARCH_UM_MMU_H

 #include <mm_id.h>
-#include <asm/mm_context.h>

 typedef struct mm_context {
 	struct mm_id id;
-	struct uml_arch_mm_context arch;
+
+	/* Address range in need of a TLB sync */
+	unsigned long sync_tlb_range_from;
+	unsigned long sync_tlb_range_to;
 } mm_context_t;

-/* Avoid tangled inclusion with asm/ldt.h */
-extern long init_new_ldt(struct mm_context *to_mm, struct mm_context *from_mm);
-extern void free_ldt(struct mm_context *mm);
-
 #endif
@@ -13,8 +13,6 @@
 #include <asm/mm_hooks.h>
 #include <asm/mmu.h>

-extern void force_flush_all(void);
-
 #define activate_mm activate_mm
 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
 {
@@ -244,6 +244,38 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval)

 #define PFN_PTE_SHIFT		PAGE_SHIFT

+static inline void um_tlb_mark_sync(struct mm_struct *mm, unsigned long start,
+				    unsigned long end)
+{
+	if (!mm->context.sync_tlb_range_to) {
+		mm->context.sync_tlb_range_from = start;
+		mm->context.sync_tlb_range_to = end;
+	} else {
+		if (start < mm->context.sync_tlb_range_from)
+			mm->context.sync_tlb_range_from = start;
+		if (end > mm->context.sync_tlb_range_to)
+			mm->context.sync_tlb_range_to = end;
+	}
+}
+
+#define set_ptes set_ptes
+static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
+			    pte_t *ptep, pte_t pte, int nr)
+{
+	/* Basically the default implementation */
+	size_t length = nr * PAGE_SIZE;
+
+	for (;;) {
+		set_pte(ptep, pte);
+		if (--nr == 0)
+			break;
+		ptep++;
+		pte = __pte(pte_val(pte) + (nr << PFN_PTE_SHIFT));
+	}
+
+	um_tlb_mark_sync(mm, addr, addr + length);
+}
+
 #define __HAVE_ARCH_PTE_SAME
 static inline int pte_same(pte_t pte_a, pte_t pte_b)
 {
@@ -9,23 +9,51 @@
 #include <linux/mm.h>

 /*
- * TLB flushing:
+ * In UML, we need to sync the TLB over by using mmap/munmap/mprotect syscalls
+ * from the process handling the MM (which can be the kernel itself).
+ *
+ * To track updates, we can hook into set_ptes and flush_tlb_*. With set_ptes
+ * we catch all PTE transitions where memory that was unusable becomes usable.
+ * While with flush_tlb_* we can track any memory that becomes unusable and
+ * even if a higher layer of the page table was modified.
+ *
+ * So, we simply track updates using both methods and mark the memory area to
+ * be synced later on. The only special case is that flush_tlb_kern_* needs to
+ * be executed immediately as there is no good synchronization point in that
+ * case. In contrast, in the set_ptes case we can wait for the next kernel
+ * segfault before we do the synchornization.
 *
- *  - flush_tlb() flushes the current mm struct TLBs
 *  - flush_tlb_all() flushes all processes TLBs
 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
 *  - flush_tlb_page(vma, vmaddr) flushes one page
- *  - flush_tlb_kernel_vm() flushes the kernel vm area
 *  - flush_tlb_range(vma, start, end) flushes a range of pages
+ *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
 */

+extern int um_tlb_sync(struct mm_struct *mm);
+
 extern void flush_tlb_all(void);
 extern void flush_tlb_mm(struct mm_struct *mm);
-extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 
-			    unsigned long end);
-extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long address);
-extern void flush_tlb_kernel_vm(void);
-extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
-extern void __flush_tlb_one(unsigned long addr);
+
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+				  unsigned long address)
+{
+	um_tlb_mark_sync(vma->vm_mm, address, address + PAGE_SIZE);
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+				   unsigned long start, unsigned long end)
+{
+	um_tlb_mark_sync(vma->vm_mm, start, end);
+}
+
+static inline void flush_tlb_kernel_range(unsigned long start,
+					  unsigned long end)
+{
+	um_tlb_mark_sync(&init_mm, start, end);
+
+	/* Kernel needs to be synced immediately */
+	um_tlb_sync(&init_mm);
+}

 #endif
@@ -23,7 +23,7 @@
 #define STUB_START stub_start
 #define STUB_CODE STUB_START
 #define STUB_DATA (STUB_CODE + UM_KERN_PAGE_SIZE)
-#define STUB_DATA_PAGES 1 /* must be a power of two */
+#define STUB_DATA_PAGES 2 /* must be a power of two */
 #define STUB_END (STUB_DATA + STUB_DATA_PAGES * UM_KERN_PAGE_SIZE)

 #ifndef __ASSEMBLY__
@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* for use by sys-$SUBARCH/kernel-offsets.c */
-#include <stub-data.h>

 DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);

@@ -30,7 +29,3 @@ DEFINE(UML_CONFIG_64BIT, CONFIG_64BIT);
 DEFINE(UML_CONFIG_UML_TIME_TRAVEL_SUPPORT, CONFIG_UML_TIME_TRAVEL_SUPPORT);
 #endif

-/* for stub */
-DEFINE(UML_STUB_FIELD_OFFSET, offsetof(struct stub_data, offset));
-DEFINE(UML_STUB_FIELD_CHILD_ERR, offsetof(struct stub_data, child_err));
-DEFINE(UML_STUB_FIELD_FD, offsetof(struct stub_data, fd));
@@ -13,7 +13,6 @@ struct siginfo;

 extern int uml_exitcode;

-extern int ncpus;
 extern int kmalloc_ok;

 #define UML_ROUND_UP(addr) \
@@ -163,8 +163,10 @@ extern int os_set_fd_block(int fd, int blocking);
 extern int os_accept_connection(int fd);
 extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
 extern int os_shutdown_socket(int fd, int r, int w);
+extern int os_dup_file(int fd);
 extern void os_close_file(int fd);
-extern int os_rcv_fd(int fd, int *helper_pid_out);
+ssize_t os_rcv_fd_msg(int fd, int *fds, unsigned int n_fds,
+		      void *data, size_t data_len);
 extern int os_connect_socket(const char *name);
 extern int os_file_type(char *file);
 extern int os_file_mode(const char *file, struct openflags *mode_out);
@@ -179,6 +181,8 @@ extern int os_eventfd(unsigned int initval, int flags);
 extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
 			  const int *fds, unsigned int fds_num);
 int os_poll(unsigned int n, const int *fds);
+void *os_mmap_rw_shared(int fd, size_t size);
+void *os_mremap_rw_shared(void *old_addr, size_t old_size, size_t new_size);

 /* start_up.c */
 extern void os_early_checks(void);
@@ -191,6 +195,9 @@ extern void get_host_cpu_features(
 /* mem.c */
 extern int create_mem_file(unsigned long long len);

+/* tlb.c */
+extern void report_enomem(void);
+
 /* process.c */
 extern unsigned long os_process_pc(int pid);
 extern int os_process_parent(int pid);
@@ -268,24 +275,20 @@ extern long long os_persistent_clock_emulation(void);
 extern long long os_nsecs(void);

 /* skas/mem.c */
-extern long run_syscall_stub(struct mm_id * mm_idp,
-			     int syscall, unsigned long *args, long expected,
-			     void **addr, int done);
-extern long syscall_stub_data(struct mm_id * mm_idp,
-			      unsigned long *data, int data_count,
-			      void **addr, void **stub_addr);
-extern int map(struct mm_id * mm_idp, unsigned long virt,
-	       unsigned long len, int prot, int phys_fd,
-	       unsigned long long offset, int done, void **data);
-extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
-		 int done, void **data);
-extern int protect(struct mm_id * mm_idp, unsigned long addr,
-		   unsigned long len, unsigned int prot, int done, void **data);
+int syscall_stub_flush(struct mm_id *mm_idp);
+struct stub_syscall *syscall_stub_alloc(struct mm_id *mm_idp);
+void syscall_stub_dump_error(struct mm_id *mm_idp);
+
+int map(struct mm_id *mm_idp, unsigned long virt,
+	unsigned long len, int prot, int phys_fd,
+	unsigned long long offset);
+int unmap(struct mm_id *mm_idp, unsigned long addr, unsigned long len);
+int protect(struct mm_id *mm_idp, unsigned long addr,
+	    unsigned long len, unsigned int prot);

 /* skas/process.c */
 extern int is_skas_winch(int pid, int fd, void *data);
 extern int start_userspace(unsigned long stub_stack);
-extern int copy_context_skas0(unsigned long stack, int pid);
 extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
 extern void switch_threads(jmp_buf *me, jmp_buf *you);
@@ -12,7 +12,7 @@ struct mm_id {
 		int pid;
 	} u;
 	unsigned long stack;
-	int kill;
+	int syscall_data_len;
 };

 void __switch_mm(struct mm_id *mm_idp);
@@ -15,5 +15,7 @@ extern void new_thread_handler(void);
 extern void handle_syscall(struct uml_pt_regs *regs);
 extern long execute_syscall_skas(void *r);
 extern unsigned long current_stub_stack(void);
+extern struct mm_id *current_mm_id(void);
+extern void current_mm_sync(void);

 #endif
@@ -8,10 +8,42 @@
 #ifndef __STUB_DATA_H
 #define __STUB_DATA_H

+#include <linux/compiler_types.h>
+#include <as-layout.h>
+#include <sysdep/tls.h>
+
+#define STUB_NEXT_SYSCALL(s) \
+	((struct stub_syscall *) (((unsigned long) s) + (s)->cmd_len))
+
+enum stub_syscall_type {
+	STUB_SYSCALL_UNSET = 0,
+	STUB_SYSCALL_MMAP,
+	STUB_SYSCALL_MUNMAP,
+	STUB_SYSCALL_MPROTECT,
+};
+
+struct stub_syscall {
+	struct {
+		unsigned long addr;
+		unsigned long length;
+		unsigned long offset;
+		int fd;
+		int prot;
+	} mem;
+
+	enum stub_syscall_type syscall;
+};
+
 struct stub_data {
 	unsigned long offset;
-	int fd;
-	long parent_err, child_err;
+	long err, child_err;
+
+	int syscall_data_len;
+	/* 128 leaves enough room for additional fields in the struct */
+	struct stub_syscall syscall_data[(UM_KERN_PAGE_SIZE - 128) / sizeof(struct stub_syscall)] __aligned(16);
+
+	/* Stack for our signal handlers and for calling into . */
+	unsigned char sigstack[UM_KERN_PAGE_SIZE] __aligned(UM_KERN_PAGE_SIZE);
 };

 #endif
@@ -15,8 +15,17 @@ enum time_travel_mode {
 #if defined(UML_CONFIG_UML_TIME_TRAVEL_SUPPORT) || \
    defined(CONFIG_UML_TIME_TRAVEL_SUPPORT)
 extern enum time_travel_mode time_travel_mode;
+extern int time_travel_should_print_bc_msg;
 #else
 #define time_travel_mode TT_MODE_OFF
+#define time_travel_should_print_bc_msg 0
 #endif /* (UML_)CONFIG_UML_TIME_TRAVEL_SUPPORT */

+void _time_travel_print_bc_msg(void);
+static inline void time_travel_print_bc_msg(void)
+{
+	if (time_travel_should_print_bc_msg)
+		_time_travel_print_bc_msg();
+}
+
 #endif /* _UM_TIME_TRAVEL_H_ */
@@ -42,11 +42,19 @@ extern void panic(const char *fmt, ...)
 #define printk(...) _printk(__VA_ARGS__)
 extern int _printk(const char *fmt, ...)
 	__attribute__ ((format (printf, 1, 2)));
+extern void print_hex_dump(const char *level, const char *prefix_str,
+			   int prefix_type, int rowsize, int groupsize,
+			   const void *buf, size_t len, _Bool ascii);
 #else
 static inline int printk(const char *fmt, ...)
 {
 	return 0;
 }
+static inline void print_hex_dump(const char *level, const char *prefix_str,
+				  int prefix_type, int rowsize, int groupsize,
+				  const void *buf, size_t len, _Bool ascii)
+{
+}
 #endif

 extern int in_aton(char *str);
@@ -22,17 +22,8 @@

 void flush_thread(void)
 {
-	void *data = NULL;
-	int ret;
-
 	arch_flush_thread(&current->thread.arch);

-	ret = unmap(&current->mm->context.id, 0, TASK_SIZE, 1, &data);
-	if (ret) {
-		printk(KERN_ERR "%s - clearing address space failed, err = %d\n",
-		       __func__, ret);
-		force_sig(SIGKILL);
-	}
 	get_safe_registers(current_pt_regs()->regs.gp,
 			   current_pt_regs()->regs.fp);

@@ -37,7 +37,7 @@ struct irq_reg {
 	bool pending;
 	bool wakeup;
 #ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
-	bool pending_on_resume;
+	bool pending_event;
 	void (*timetravel_handler)(int, int, void *,
 				   struct time_travel_event *);
 	struct time_travel_event event;
@@ -56,6 +56,9 @@ static DEFINE_SPINLOCK(irq_lock);
 static LIST_HEAD(active_fds);
 static DECLARE_BITMAP(irqs_allocated, UM_LAST_SIGNAL_IRQ);
 static bool irqs_suspended;
+#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
+static bool irqs_pending;
+#endif

 static void irq_io_loop(struct irq_reg *irq, struct uml_pt_regs *regs)
 {
@@ -84,9 +87,12 @@ static void irq_event_handler(struct time_travel_event *ev)
 {
 	struct irq_reg *reg = container_of(ev, struct irq_reg, event);

-	/* do nothing if suspended - just to cause a wakeup */
-	if (irqs_suspended)
+	/* do nothing if suspended; just cause a wakeup and mark as pending */
+	if (irqs_suspended) {
+		irqs_pending = true;
+		reg->pending_event = true;
 		return;
+	}

 	generic_handle_irq(reg->irq);
 }
@@ -110,16 +116,47 @@ static bool irq_do_timetravel_handler(struct irq_entry *entry,
 	if (!reg->event.pending)
 		return false;

-	if (irqs_suspended)
-		reg->pending_on_resume = true;
 	return true;
 }
+
+static void irq_do_pending_events(bool timetravel_handlers_only)
+{
+	struct irq_entry *entry;
+
+	if (!irqs_pending || timetravel_handlers_only)
+		return;
+
+	irqs_pending = false;
+
+	list_for_each_entry(entry, &active_fds, list) {
+		enum um_irq_type t;
+
+		for (t = 0; t < NUM_IRQ_TYPES; t++) {
+			struct irq_reg *reg = &entry->reg[t];
+
+			/*
+			 * Any timetravel_handler was invoked already, just
+			 * directly run the IRQ.
+			 */
+			if (reg->pending_event) {
+				irq_enter();
+				generic_handle_irq(reg->irq);
+				irq_exit();
+				reg->pending_event = false;
+			}
+		}
+	}
+}
 #else
 static bool irq_do_timetravel_handler(struct irq_entry *entry,
 				      enum um_irq_type t)
 {
 	return false;
 }
+
+static void irq_do_pending_events(bool timetravel_handlers_only)
+{
+}
 #endif

 static void sigio_reg_handler(int idx, struct irq_entry *entry, enum um_irq_type t,
@@ -145,6 +182,8 @@ static void sigio_reg_handler(int idx, struct irq_entry *entry, enum um_irq_type
 	 */
 	if (timetravel_handlers_only) {
 #ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
+		reg->pending_event = true;
+		irqs_pending = true;
 		mark_sigio_pending();
 #endif
 		return;
@@ -162,6 +201,10 @@ static void _sigio_handler(struct uml_pt_regs *regs,
 	if (timetravel_handlers_only && !um_irq_timetravel_handler_used())
 		return;

+	/* Flush out pending events that were ignored due to time-travel. */
+	if (!irqs_suspended)
+		irq_do_pending_events(timetravel_handlers_only);
+
 	while (1) {
 		/* This is now lockless - epoll keeps back-referencesto the irqs
 		 * which have trigger it so there is no need to walk the irq
@@ -195,7 +238,9 @@ static void _sigio_handler(struct uml_pt_regs *regs,

 void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs)
 {
+	preempt_disable();
 	_sigio_handler(regs, irqs_suspended);
+	preempt_enable();
 }

 static struct irq_entry *get_irq_entry_by_fd(int fd)
@@ -543,30 +588,7 @@ void um_irqs_resume(void)
 	unsigned long flags;


-	local_irq_save(flags);
-#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
-	/*
-	 * We don't need to lock anything here since we're in resume
-	 * and nothing else is running, but have disabled IRQs so we
-	 * don't try anything else with the interrupt list from there.
-	 */
-	list_for_each_entry(entry, &active_fds, list) {
-		enum um_irq_type t;
-
-		for (t = 0; t < NUM_IRQ_TYPES; t++) {
-			struct irq_reg *reg = &entry->reg[t];
-
-			if (reg->pending_on_resume) {
-				irq_enter();
-				generic_handle_irq(reg->irq);
-				irq_exit();
-				reg->pending_on_resume = false;
-			}
-		}
-	}
-#endif
-
-	spin_lock(&irq_lock);
+	spin_lock_irqsave(&irq_lock, flags);
 	list_for_each_entry(entry, &active_fds, list) {
 		if (entry->suspended) {
 			int err = os_set_fd_async(entry->fd);
@@ -33,7 +33,7 @@ EXPORT_SYMBOL(os_shutdown_socket);
 EXPORT_SYMBOL(os_create_unix_socket);
 EXPORT_SYMBOL(os_connect_socket);
 EXPORT_SYMBOL(os_accept_connection);
-EXPORT_SYMBOL(os_rcv_fd);
+EXPORT_SYMBOL(os_rcv_fd_msg);
 EXPORT_SYMBOL(run_helper);
 EXPORT_SYMBOL(os_major);
 EXPORT_SYMBOL(os_minor);
@@ -73,7 +73,6 @@ void __init mem_init(void)

 	/* this will put all low memory onto the freelists */
 	memblock_free_all();
-	max_low_pfn = totalram_pages();
 	max_pfn = max_low_pfn;
 	kmalloc_ok = 1;
 }
@@ -122,8 +122,6 @@ void new_thread_handler(void)
 /* Called magically, see new_thread_handler above */
 static void fork_handler(void)
 {
-	force_flush_all();
-
 	schedule_tail(current->thread.prev_sched);

 	/*
@@ -237,73 +235,6 @@ int copy_from_user_proc(void *to, void __user *from, int size)
 	return copy_from_user(to, from, size);
 }

-static atomic_t using_sysemu = ATOMIC_INIT(0);
-int sysemu_supported;
-
-static void set_using_sysemu(int value)
-{
-	if (value > sysemu_supported)
-		return;
-	atomic_set(&using_sysemu, value);
-}
-
-static int get_using_sysemu(void)
-{
-	return atomic_read(&using_sysemu);
-}
-
-static int sysemu_proc_show(struct seq_file *m, void *v)
-{
-	seq_printf(m, "%d\n", get_using_sysemu());
-	return 0;
-}
-
-static int sysemu_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, sysemu_proc_show, NULL);
-}
-
-static ssize_t sysemu_proc_write(struct file *file, const char __user *buf,
-				 size_t count, loff_t *pos)
-{
-	char tmp[2];
-
-	if (copy_from_user(tmp, buf, 1))
-		return -EFAULT;
-
-	if (tmp[0] >= '0' && tmp[0] <= '2')
-		set_using_sysemu(tmp[0] - '0');
-	/* We use the first char, but pretend to write everything */
-	return count;
-}
-
-static const struct proc_ops sysemu_proc_ops = {
-	.proc_open	= sysemu_proc_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= single_release,
-	.proc_write	= sysemu_proc_write,
-};
-
-static int __init make_proc_sysemu(void)
-{
-	struct proc_dir_entry *ent;
-	if (!sysemu_supported)
-		return 0;
-
-	ent = proc_create("sysemu", 0600, NULL, &sysemu_proc_ops);
-
-	if (ent == NULL)
-	{
-		printk(KERN_WARNING "Failed to register /proc/sysemu\n");
-		return 0;
-	}
-
-	return 0;
-}
-
-late_initcall(make_proc_sysemu);
-
 int singlestepping(void)
 {
 	return test_thread_flag(TIF_SINGLESTEP);
@@ -59,3 +59,18 @@ void machine_halt(void)
 {
 	machine_power_off();
 }
+
+static int sys_power_off_handler(struct sys_off_data *data)
+{
+	machine_power_off();
+	return 0;
+}
+
+static int register_power_off(void)
+{
+	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
+				 SYS_OFF_PRIO_DEFAULT,
+				 sys_power_off_handler, NULL);
+	return 0;
+}
+__initcall(register_power_off);
@@ -3,15 +3,14 @@
 # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 #

-obj-y := clone.o mmu.o process.o syscall.o uaccess.o
+obj-y := stub.o mmu.o process.o syscall.o uaccess.o

-# clone.o is in the stub, so it can't be built with profiling
+# stub.o is in the stub, so it can't be built with profiling
 # GCC hardened also auto-enables -fpic, but we need %ebx so it can't work ->
 # disable it

-CFLAGS_clone.o := $(CFLAGS_NO_HARDENING)
-UNPROFILE_OBJS := clone.o
-
+CFLAGS_stub.o := $(CFLAGS_NO_HARDENING)
+UNPROFILE_OBJS := stub.o
 KCOV_INSTRUMENT := n

 include $(srctree)/arch/um/scripts/Makefile.rules
@@ -1,48 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
- * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- */
-
-#include <signal.h>
-#include <sched.h>
-#include <asm/unistd.h>
-#include <sys/time.h>
-#include <as-layout.h>
-#include <ptrace_user.h>
-#include <stub-data.h>
-#include <sysdep/stub.h>
-
-/*
- * This is in a separate file because it needs to be compiled with any
- * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
- *
- * Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize
- * on some systems.
- */
-
-void __attribute__ ((__section__ (".__syscall_stub")))
-stub_clone_handler(void)
-{
-	struct stub_data *data = get_stub_data();
-	long err;
-
-	err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
-			    (unsigned long)data +
-				STUB_DATA_PAGES * UM_KERN_PAGE_SIZE / 2);
-	if (err) {
-		data->parent_err = err;
-		goto done;
-	}
-
-	err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
-	if (err) {
-		data->child_err = err;
-		goto done;
-	}
-
-	remap_stack_and_trap();
-
- done:
-	trap_myself();
-}
@@ -14,11 +14,14 @@
 #include <as-layout.h>
 #include <os.h>
 #include <skas.h>
+#include <stub-data.h>
+
+/* Ensure the stub_data struct covers the allocated area */
+static_assert(sizeof(struct stub_data) == STUB_DATA_PAGES * UM_KERN_PAGE_SIZE);

 int init_new_context(struct task_struct *task, struct mm_struct *mm)
 {
- 	struct mm_context *from_mm = NULL;
-	struct mm_context *to_mm = &mm->context;
+	struct mm_id *new_id = &mm->context.id;
 	unsigned long stack = 0;
 	int ret = -ENOMEM;

@@ -26,34 +29,46 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
 	if (stack == 0)
 		goto out;

-	to_mm->id.stack = stack;
-	if (current->mm != NULL && current->mm != &init_mm)
-		from_mm = &current->mm->context;
+	new_id->stack = stack;

 	block_signals_trace();
-	if (from_mm)
-		to_mm->id.u.pid = copy_context_skas0(stack,
-						     from_mm->id.u.pid);
-	else to_mm->id.u.pid = start_userspace(stack);
+	new_id->u.pid = start_userspace(stack);
 	unblock_signals_trace();

-	if (to_mm->id.u.pid < 0) {
-		ret = to_mm->id.u.pid;
+	if (new_id->u.pid < 0) {
+		ret = new_id->u.pid;
 		goto out_free;
 	}

-	ret = init_new_ldt(to_mm, from_mm);
-	if (ret < 0) {
-		printk(KERN_ERR "init_new_context_skas - init_ldt"
-		       " failed, errno = %d\n", ret);
-		goto out_free;
-	}
+	/*
+	 * Ensure the new MM is clean and nothing unwanted is mapped.
+	 *
+	 * TODO: We should clear the memory up to STUB_START to ensure there is
+	 * nothing mapped there, i.e. we (currently) have:
+	 *
+	 * |- user memory -|- unused        -|- stub        -|- unused    -|
+	 *                 ^ TASK_SIZE      ^ STUB_START
+	 *
+	 * Meaning we have two unused areas where we may still have valid
+	 * mappings from our internal clone(). That isn't really a problem as
+	 * userspace is not going to access them, but it is definitely not
+	 * correct.
+	 *
+	 * However, we are "lucky" and if rseq is configured, then on 32 bit
+	 * it will fall into the first empty range while on 64 bit it is going
+	 * to use an anonymous mapping in the second range. As such, things
+	 * continue to work for now as long as we don't start unmapping these
+	 * areas.
+	 *
+	 * Change this to STUB_START once we have a clean userspace.
+	 */
+	unmap(new_id, 0, TASK_SIZE);

 	return 0;

 out_free:
-	if (to_mm->id.stack != 0)
-		free_pages(to_mm->id.stack, ilog2(STUB_DATA_PAGES));
+	if (new_id->stack != 0)
+		free_pages(new_id->stack, ilog2(STUB_DATA_PAGES));
 out:
 	return ret;
 }
@@ -76,5 +91,4 @@ void destroy_context(struct mm_struct *mm)
 	os_kill_ptraced_process(mmu->id.u.pid, 1);

 	free_pages(mmu->id.stack, ilog2(STUB_DATA_PAGES));
-	free_ldt(mmu);
 }
--- a/Show More
+++ b/Show More