From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- Documentation/devicetree/bindings/virtio/mmio.yaml | 67 +++++++++++++++ .../devicetree/bindings/virtio/pci-iommu.yaml | 99 ++++++++++++++++++++++ .../devicetree/bindings/virtio/virtio-device.yaml | 41 +++++++++ 3 files changed, 207 insertions(+) create mode 100644 Documentation/devicetree/bindings/virtio/mmio.yaml create mode 100644 Documentation/devicetree/bindings/virtio/pci-iommu.yaml create mode 100644 Documentation/devicetree/bindings/virtio/virtio-device.yaml (limited to 'Documentation/devicetree/bindings/virtio') diff --git a/Documentation/devicetree/bindings/virtio/mmio.yaml b/Documentation/devicetree/bindings/virtio/mmio.yaml new file mode 100644 index 000000000..0aa8433f0 --- /dev/null +++ b/Documentation/devicetree/bindings/virtio/mmio.yaml @@ -0,0 +1,67 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/virtio/mmio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: virtio memory mapped devices + +maintainers: + - Jean-Philippe Brucker + +description: + See https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio for + more details. + +properties: + compatible: + const: virtio,mmio + + reg: + maxItems: 1 + + dma-coherent: true + + interrupts: + maxItems: 1 + + '#iommu-cells': + description: Required when the node corresponds to a virtio-iommu device. + const: 1 + + iommus: + description: Required for devices making accesses thru an IOMMU. + maxItems: 1 + + wakeup-source: + type: boolean + description: Required for setting irq of a virtio_mmio device as wakeup source. + +required: + - compatible + - reg + - interrupts + +additionalProperties: + type: object + +examples: + - | + virtio@3000 { + compatible = "virtio,mmio"; + reg = <0x3000 0x100>; + interrupts = <41>; + + /* Device has endpoint ID 23 */ + iommus = <&viommu 23>; + }; + + viommu: iommu@3100 { + compatible = "virtio,mmio"; + reg = <0x3100 0x100>; + interrupts = <42>; + + #iommu-cells = <1>; + }; + +... diff --git a/Documentation/devicetree/bindings/virtio/pci-iommu.yaml b/Documentation/devicetree/bindings/virtio/pci-iommu.yaml new file mode 100644 index 000000000..8bd6ad72a --- /dev/null +++ b/Documentation/devicetree/bindings/virtio/pci-iommu.yaml @@ -0,0 +1,99 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/virtio/pci-iommu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: virtio-iommu device using the virtio-pci transport + +maintainers: + - Jean-Philippe Brucker + +description: | + When virtio-iommu uses the PCI transport, its programming interface is + discovered dynamically by the PCI probing infrastructure. However the + device tree statically describes the relation between IOMMU and DMA + masters. Therefore, the PCI root complex that hosts the virtio-iommu + contains a child node representing the IOMMU device explicitly. + + DMA from the IOMMU device isn't managed by another IOMMU. Therefore the + virtio-iommu node doesn't have an "iommus" property, and is omitted from + the iommu-map property of the root complex. + +allOf: + - $ref: /schemas/pci/pci-device.yaml# + +properties: + # If compatible is present, it should contain the vendor and device ID + # according to the PCI Bus Binding specification. Since PCI provides + # built-in identification methods, compatible is not actually required. + compatible: + oneOf: + - items: + - const: virtio,pci-iommu + - const: pci1af4,1057 + - items: + - const: pci1af4,1057 + + reg: + maxItems: 1 + + '#iommu-cells': + const: 1 + +required: + - compatible + - reg + - '#iommu-cells' + +additionalProperties: false + +examples: + - | + bus { + #address-cells = <2>; + #size-cells = <2>; + + pcie@40000000 { + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + reg = <0x0 0x40000000 0x0 0x1000000>; + ranges = <0x02000000 0x0 0x41000000 0x0 0x41000000 0x0 0x0f000000>; + + /* + * The IOMMU manages all functions in this PCI domain except + * itself. Omit BDF 00:01.0. + */ + iommu-map = <0x0 &iommu0 0x0 0x8 + 0x9 &iommu0 0x9 0xfff7>; + + /* The IOMMU programming interface uses slot 00:01.0 */ + iommu0: iommu@1,0 { + compatible = "pci1af4,1057"; + reg = <0x800 0 0 0 0>; + #iommu-cells = <1>; + }; + }; + + pcie@50000000 { + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + reg = <0x0 0x50000000 0x0 0x1000000>; + ranges = <0x02000000 0x0 0x51000000 0x0 0x51000000 0x0 0x0f000000>; + + /* + * The IOMMU also manages all functions from this domain, + * with endpoint IDs 0x10000 - 0x1ffff + */ + iommu-map = <0x0 &iommu0 0x10000 0x10000>; + }; + + ethernet { + /* The IOMMU manages this platform device with endpoint ID 0x20000 */ + iommus = <&iommu0 0x20000>; + }; + }; + +... diff --git a/Documentation/devicetree/bindings/virtio/virtio-device.yaml b/Documentation/devicetree/bindings/virtio/virtio-device.yaml new file mode 100644 index 000000000..8c6919ba9 --- /dev/null +++ b/Documentation/devicetree/bindings/virtio/virtio-device.yaml @@ -0,0 +1,41 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/virtio/virtio-device.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Virtio device + +maintainers: + - Viresh Kumar + +description: + These bindings are applicable to virtio devices irrespective of the bus they + are bound to, like mmio or pci. + +# We need a select here so we don't match all nodes with 'virtio,mmio' +properties: + compatible: + pattern: "^virtio,device[0-9a-f]{1,8}$" + description: Virtio device nodes. + "virtio,deviceID", where ID is the virtio device id. The textual + representation of ID shall be in lower case hexadecimal with leading + zeroes suppressed. + +required: + - compatible + +additionalProperties: true + +examples: + - | + virtio@3000 { + compatible = "virtio,mmio"; + reg = <0x3000 0x100>; + interrupts = <43>; + + i2c { + compatible = "virtio,device22"; + }; + }; +... -- cgit v1.3.1