virtio, vhost: fixes, features, performance
new iommu device vhost guest memory access using vmap (just meta-data for now) minor fixes Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Note: due to code driver changes the driver-core tree, the following patch is needed when merging tree with commit92ce7e83b4("driver_find_device: Unify the match function with class_find_device()") in the driver-core tree: From: Nathan Chancellor <natechancellor@gmail.com> Subject: [PATCH] iommu/virtio: Constify data parameter in viommu_match_node After commit92ce7e83b4("driver_find_device: Unify the match function with class_find_device()") in the driver-core tree. Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- drivers/iommu/virtio-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 4620dd221ffd..433f4d2ee956 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -839,7 +839,7 @@ static void viommu_put_resv_regions(struct device *dev, struct list_head *head) static struct iommu_ops viommu_ops; static struct virtio_driver virtio_iommu_drv; -static int viommu_match_node(struct device *dev, void *data) +static int viommu_match_node(struct device *dev, const void *data) { return dev->parent->fwnode == data; } -----BEGIN PGP SIGNATURE----- iQEcBAABAgAGBQJdJ5qUAAoJECgfDbjSjVRpQs0H/2qWcIG1zjGKyh9KWrfgOusG /QIqeP50d7SC6oqdyd00tzmExqO1xdGLPFzYixdOsU817te1gHBP4Rfmzo01jZRd CUzZNnZQ2JRsDshiA6G2ui+wn1/a/cB3RPN4rT1mquDYS53QmsRGDQDnpp84TXMV aocB8TS6halbRzKMq3VmaWHIvzNXnt4dwQR542+PyeLLn9bUx2QwWj2ON3QwxixK dVRZow3GwLGBhKTA/Z1Z/Bta4fEfOKjUGP2XWgvL6zOr+nZR4eQ8w5WXVJYzR+d6 1JCfqTxleweT2k6Tu5VwtTNlQkxn/XvQAeisppOiEE6NnPjubyI9wMQIvL7bkpo= =uJbC -----END PGP SIGNATURE----- Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost Pull virtio, vhost updates from Michael Tsirkin: "Fixes, features, performance: - new iommu device - vhost guest memory access using vmap (just meta-data for now) - minor fixes" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio-mmio: add error check for platform_get_irq scsi: virtio_scsi: Use struct_size() helper iommu/virtio: Add event queue iommu/virtio: Add probe request iommu: Add virtio-iommu driver PCI: OF: Initialize dev->fwnode appropriately of: Allow the iommu-map property to omit untranslated devices dt-bindings: virtio: Add virtio-pci-iommu node dt-bindings: virtio-mmio: Add IOMMU description vhost: fix clang build warning vhost: access vq metadata through kernel virtual address vhost: factor out setting vring addr and num vhost: introduce helpers to get the size of metadata area vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch() vhost: fine grain userspace memory accessors vhost: generalize adding used elem
This commit is contained in:
Linus Torvalds
commit
3a1d5384b7
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@ -0,0 +1,66 @@
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* virtio IOMMU PCI device
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When virtio-iommu uses the PCI transport, its programming interface is
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discovered dynamically by the PCI probing infrastructure. However the
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device tree statically describes the relation between IOMMU and DMA
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masters. Therefore, the PCI root complex that hosts the virtio-iommu
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contains a child node representing the IOMMU device explicitly.
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Required properties:
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- compatible: Should be "virtio,pci-iommu"
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- reg: PCI address of the IOMMU. As defined in the PCI Bus
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Binding reference [1], the reg property is a five-cell
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address encoded as (phys.hi phys.mid phys.lo size.hi
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size.lo). phys.hi should contain the device's BDF as
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0b00000000 bbbbbbbb dddddfff 00000000. The other cells
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should be zero.
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- #iommu-cells: Each platform DMA master managed by the IOMMU is assigned
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an endpoint ID, described by the "iommus" property [2].
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For virtio-iommu, #iommu-cells must be 1.
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Notes:
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- DMA from the IOMMU device isn't managed by another IOMMU. Therefore the
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virtio-iommu node doesn't have an "iommus" property, and is omitted from
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the iommu-map property of the root complex.
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Example:
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pcie@10000000 {
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compatible = "pci-host-ecam-generic";
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...
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/* The IOMMU programming interface uses slot 00:01.0 */
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iommu0: iommu@0008 {
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compatible = "virtio,pci-iommu";
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reg = <0x00000800 0 0 0 0>;
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#iommu-cells = <1>;
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};
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/*
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* The IOMMU manages all functions in this PCI domain except
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* itself. Omit BDF 00:01.0.
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*/
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iommu-map = <0x0 &iommu0 0x0 0x8>
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<0x9 &iommu0 0x9 0xfff7>;
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};
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pcie@20000000 {
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compatible = "pci-host-ecam-generic";
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...
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/*
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* The IOMMU also manages all functions from this domain,
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* with endpoint IDs 0x10000 - 0x1ffff
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*/
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iommu-map = <0x0 &iommu0 0x10000 0x10000>;
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};
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ethernet@fe001000 {
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...
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/* The IOMMU manages this platform device with endpoint ID 0x20000 */
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iommus = <&iommu0 0x20000>;
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};
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[1] Documentation/devicetree/bindings/pci/pci.txt
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[2] Documentation/devicetree/bindings/iommu/iommu.txt
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@ -8,10 +8,40 @@ Required properties:
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- reg: control registers base address and size including configuration space
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- interrupts: interrupt generated by the device
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Required properties for virtio-iommu:
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- #iommu-cells: When the node corresponds to a virtio-iommu device, it is
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linked to DMA masters using the "iommus" or "iommu-map"
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properties [1][2]. #iommu-cells specifies the size of the
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"iommus" property. For virtio-iommu #iommu-cells must be
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1, each cell describing a single endpoint ID.
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Optional properties:
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- iommus: If the device accesses memory through an IOMMU, it should
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have an "iommus" property [1]. Since virtio-iommu itself
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does not access memory through an IOMMU, the "virtio,mmio"
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node cannot have both an "#iommu-cells" and an "iommus"
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property.
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Example:
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virtio_block@3000 {
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compatible = "virtio,mmio";
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reg = <0x3000 0x100>;
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interrupts = <41>;
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/* Device has endpoint ID 23 */
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iommus = <&viommu 23>
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}
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viommu: iommu@3100 {
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compatible = "virtio,mmio";
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reg = <0x3100 0x100>;
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interrupts = <42>;
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#iommu-cells = <1>
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}
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[1] Documentation/devicetree/bindings/iommu/iommu.txt
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[2] Documentation/devicetree/bindings/pci/pci-iommu.txt
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|
|
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|
@ -17107,6 +17107,13 @@ S: Maintained
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F: drivers/virtio/virtio_input.c
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F: include/uapi/linux/virtio_input.h
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VIRTIO IOMMU DRIVER
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M: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
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L: virtualization@lists.linux-foundation.org
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S: Maintained
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F: drivers/iommu/virtio-iommu.c
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F: include/uapi/linux/virtio_iommu.h
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VIRTUAL BOX GUEST DEVICE DRIVER
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M: Hans de Goede <hdegoede@redhat.com>
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M: Arnd Bergmann <arnd@arndb.de>
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|
|
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@ -473,4 +473,15 @@ config HYPERV_IOMMU
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Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
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guests to run with x2APIC mode enabled.
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config VIRTIO_IOMMU
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bool "Virtio IOMMU driver"
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depends on VIRTIO=y
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depends on ARM64
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select IOMMU_API
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select INTERVAL_TREE
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help
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Para-virtualised IOMMU driver with virtio.
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Say Y here if you intend to run this kernel as a guest.
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endif # IOMMU_SUPPORT
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|
|
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@ -33,3 +33,4 @@ obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o
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obj-$(CONFIG_S390_IOMMU) += s390-iommu.o
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obj-$(CONFIG_QCOM_IOMMU) += qcom_iommu.o
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obj-$(CONFIG_HYPERV_IOMMU) += hyperv-iommu.o
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obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
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|
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File diff suppressed because it is too large
Load Diff
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@ -2294,8 +2294,12 @@ int of_map_rid(struct device_node *np, u32 rid,
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return 0;
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}
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pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",
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np, map_name, rid, target && *target ? *target : NULL);
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return -EFAULT;
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pr_info("%pOF: no %s translation for rid 0x%x on %pOF\n", np, map_name,
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rid, target && *target ? *target : NULL);
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/* Bypasses translation */
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if (id_out)
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*id_out = rid;
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return 0;
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}
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EXPORT_SYMBOL_GPL(of_map_rid);
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|
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@ -22,12 +22,15 @@ void pci_set_of_node(struct pci_dev *dev)
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return;
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dev->dev.of_node = of_pci_find_child_device(dev->bus->dev.of_node,
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dev->devfn);
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if (dev->dev.of_node)
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dev->dev.fwnode = &dev->dev.of_node->fwnode;
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}
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void pci_release_of_node(struct pci_dev *dev)
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{
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of_node_put(dev->dev.of_node);
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dev->dev.of_node = NULL;
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dev->dev.fwnode = NULL;
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}
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void pci_set_bus_of_node(struct pci_bus *bus)
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@ -41,13 +44,18 @@ void pci_set_bus_of_node(struct pci_bus *bus)
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if (node && of_property_read_bool(node, "external-facing"))
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bus->self->untrusted = true;
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}
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bus->dev.of_node = node;
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if (bus->dev.of_node)
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bus->dev.fwnode = &bus->dev.of_node->fwnode;
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}
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void pci_release_bus_of_node(struct pci_bus *bus)
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{
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of_node_put(bus->dev.of_node);
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bus->dev.of_node = NULL;
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bus->dev.fwnode = NULL;
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}
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struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
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|
|
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@ -792,7 +792,7 @@ static int virtscsi_probe(struct virtio_device *vdev)
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num_targets = virtscsi_config_get(vdev, max_target) + 1;
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shost = scsi_host_alloc(&virtscsi_host_template,
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sizeof(*vscsi) + sizeof(vscsi->req_vqs[0]) * num_queues);
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struct_size(vscsi, req_vqs, num_queues));
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if (!shost)
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return -ENOMEM;
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|
|
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|
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@ -956,7 +956,7 @@ static void handle_tx(struct vhost_net *net)
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if (!sock)
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goto out;
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if (!vq_iotlb_prefetch(vq))
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if (!vq_meta_prefetch(vq))
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goto out;
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vhost_disable_notify(&net->dev, vq);
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@ -1125,7 +1125,7 @@ static void handle_rx(struct vhost_net *net)
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if (!sock)
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goto out;
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if (!vq_iotlb_prefetch(vq))
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if (!vq_meta_prefetch(vq))
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goto out;
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vhost_disable_notify(&net->dev, vq);
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|
|
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File diff suppressed because it is too large
Load Diff
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|
@ -12,6 +12,9 @@
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#include <linux/virtio_config.h>
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#include <linux/virtio_ring.h>
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#include <linux/atomic.h>
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#include <linux/pagemap.h>
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#include <linux/mmu_notifier.h>
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#include <asm/cacheflush.h>
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struct vhost_work;
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typedef void (*vhost_work_fn_t)(struct vhost_work *work);
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|
@ -80,6 +83,24 @@ enum vhost_uaddr_type {
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VHOST_NUM_ADDRS = 3,
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};
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struct vhost_map {
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int npages;
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void *addr;
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struct page **pages;
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};
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struct vhost_uaddr {
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unsigned long uaddr;
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size_t size;
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bool write;
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};
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#if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
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#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
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#else
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#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
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#endif
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|
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/* The virtqueue structure describes a queue attached to a device. */
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struct vhost_virtqueue {
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struct vhost_dev *dev;
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|
|
@ -90,7 +111,22 @@ struct vhost_virtqueue {
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struct vring_desc __user *desc;
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struct vring_avail __user *avail;
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struct vring_used __user *used;
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|
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#if VHOST_ARCH_CAN_ACCEL_UACCESS
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/* Read by memory accessors, modified by meta data
|
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* prefetching, MMU notifier and vring ioctl().
|
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* Synchonrized through mmu_lock (writers) and RCU (writers
|
||||
* and readers).
|
||||
*/
|
||||
struct vhost_map __rcu *maps[VHOST_NUM_ADDRS];
|
||||
/* Read by MMU notifier, modified by vring ioctl(),
|
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* synchronized through MMU notifier
|
||||
* registering/unregistering.
|
||||
*/
|
||||
struct vhost_uaddr uaddrs[VHOST_NUM_ADDRS];
|
||||
#endif
|
||||
const struct vhost_umem_node *meta_iotlb[VHOST_NUM_ADDRS];
|
||||
|
||||
struct file *kick;
|
||||
struct eventfd_ctx *call_ctx;
|
||||
struct eventfd_ctx *error_ctx;
|
||||
|
|
@ -145,6 +181,8 @@ struct vhost_virtqueue {
|
|||
bool user_be;
|
||||
#endif
|
||||
u32 busyloop_timeout;
|
||||
spinlock_t mmu_lock;
|
||||
int invalidate_count;
|
||||
};
|
||||
|
||||
struct vhost_msg_node {
|
||||
|
|
@ -158,6 +196,9 @@ struct vhost_msg_node {
|
|||
|
||||
struct vhost_dev {
|
||||
struct mm_struct *mm;
|
||||
#ifdef CONFIG_MMU_NOTIFIER
|
||||
struct mmu_notifier mmu_notifier;
|
||||
#endif
|
||||
struct mutex mutex;
|
||||
struct vhost_virtqueue **vqs;
|
||||
int nvqs;
|
||||
|
|
@ -212,7 +253,7 @@ bool vhost_enable_notify(struct vhost_dev *, struct vhost_virtqueue *);
|
|||
int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
|
||||
unsigned int log_num, u64 len,
|
||||
struct iovec *iov, int count);
|
||||
int vq_iotlb_prefetch(struct vhost_virtqueue *vq);
|
||||
int vq_meta_prefetch(struct vhost_virtqueue *vq);
|
||||
|
||||
struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type);
|
||||
void vhost_enqueue_msg(struct vhost_dev *dev,
|
||||
|
|
|
|||
|
|
@ -463,9 +463,14 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
|
|||
struct irq_affinity *desc)
|
||||
{
|
||||
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
|
||||
unsigned int irq = platform_get_irq(vm_dev->pdev, 0);
|
||||
int irq = platform_get_irq(vm_dev->pdev, 0);
|
||||
int i, err, queue_idx = 0;
|
||||
|
||||
if (irq < 0) {
|
||||
dev_err(&vdev->dev, "Cannot get IRQ resource\n");
|
||||
return irq;
|
||||
}
|
||||
|
||||
err = request_irq(irq, vm_interrupt, IRQF_SHARED,
|
||||
dev_name(&vdev->dev), vm_dev);
|
||||
if (err)
|
||||
|
|
|
|||
|
|
@ -43,5 +43,6 @@
|
|||
#define VIRTIO_ID_INPUT 18 /* virtio input */
|
||||
#define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */
|
||||
#define VIRTIO_ID_CRYPTO 20 /* virtio crypto */
|
||||
#define VIRTIO_ID_IOMMU 23 /* virtio IOMMU */
|
||||
|
||||
#endif /* _LINUX_VIRTIO_IDS_H */
|
||||
|
|
|
|||
|
|
@ -0,0 +1,161 @@
|
|||
/* SPDX-License-Identifier: BSD-3-Clause */
|
||||
/*
|
||||
* Virtio-iommu definition v0.9
|
||||
*
|
||||
* Copyright (C) 2018 Arm Ltd.
|
||||
*/
|
||||
#ifndef _UAPI_LINUX_VIRTIO_IOMMU_H
|
||||
#define _UAPI_LINUX_VIRTIO_IOMMU_H
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
/* Feature bits */
|
||||
#define VIRTIO_IOMMU_F_INPUT_RANGE 0
|
||||
#define VIRTIO_IOMMU_F_DOMAIN_BITS 1
|
||||
#define VIRTIO_IOMMU_F_MAP_UNMAP 2
|
||||
#define VIRTIO_IOMMU_F_BYPASS 3
|
||||
#define VIRTIO_IOMMU_F_PROBE 4
|
||||
|
||||
struct virtio_iommu_range {
|
||||
__u64 start;
|
||||
__u64 end;
|
||||
};
|
||||
|
||||
struct virtio_iommu_config {
|
||||
/* Supported page sizes */
|
||||
__u64 page_size_mask;
|
||||
/* Supported IOVA range */
|
||||
struct virtio_iommu_range input_range;
|
||||
/* Max domain ID size */
|
||||
__u8 domain_bits;
|
||||
__u8 padding[3];
|
||||
/* Probe buffer size */
|
||||
__u32 probe_size;
|
||||
};
|
||||
|
||||
/* Request types */
|
||||
#define VIRTIO_IOMMU_T_ATTACH 0x01
|
||||
#define VIRTIO_IOMMU_T_DETACH 0x02
|
||||
#define VIRTIO_IOMMU_T_MAP 0x03
|
||||
#define VIRTIO_IOMMU_T_UNMAP 0x04
|
||||
#define VIRTIO_IOMMU_T_PROBE 0x05
|
||||
|
||||
/* Status types */
|
||||
#define VIRTIO_IOMMU_S_OK 0x00
|
||||
#define VIRTIO_IOMMU_S_IOERR 0x01
|
||||
#define VIRTIO_IOMMU_S_UNSUPP 0x02
|
||||
#define VIRTIO_IOMMU_S_DEVERR 0x03
|
||||
#define VIRTIO_IOMMU_S_INVAL 0x04
|
||||
#define VIRTIO_IOMMU_S_RANGE 0x05
|
||||
#define VIRTIO_IOMMU_S_NOENT 0x06
|
||||
#define VIRTIO_IOMMU_S_FAULT 0x07
|
||||
|
||||
struct virtio_iommu_req_head {
|
||||
__u8 type;
|
||||
__u8 reserved[3];
|
||||
};
|
||||
|
||||
struct virtio_iommu_req_tail {
|
||||
__u8 status;
|
||||
__u8 reserved[3];
|
||||
};
|
||||
|
||||
struct virtio_iommu_req_attach {
|
||||
struct virtio_iommu_req_head head;
|
||||
__le32 domain;
|
||||
__le32 endpoint;
|
||||
__u8 reserved[8];
|
||||
struct virtio_iommu_req_tail tail;
|
||||
};
|
||||
|
||||
struct virtio_iommu_req_detach {
|
||||
struct virtio_iommu_req_head head;
|
||||
__le32 domain;
|
||||
__le32 endpoint;
|
||||
__u8 reserved[8];
|
||||
struct virtio_iommu_req_tail tail;
|
||||
};
|
||||
|
||||
#define VIRTIO_IOMMU_MAP_F_READ (1 << 0)
|
||||
#define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1)
|
||||
#define VIRTIO_IOMMU_MAP_F_EXEC (1 << 2)
|
||||
#define VIRTIO_IOMMU_MAP_F_MMIO (1 << 3)
|
||||
|
||||
#define VIRTIO_IOMMU_MAP_F_MASK (VIRTIO_IOMMU_MAP_F_READ | \
|
||||
VIRTIO_IOMMU_MAP_F_WRITE | \
|
||||
VIRTIO_IOMMU_MAP_F_EXEC | \
|
||||
VIRTIO_IOMMU_MAP_F_MMIO)
|
||||
|
||||
struct virtio_iommu_req_map {
|
||||
struct virtio_iommu_req_head head;
|
||||
__le32 domain;
|
||||
__le64 virt_start;
|
||||
__le64 virt_end;
|
||||
__le64 phys_start;
|
||||
__le32 flags;
|
||||
struct virtio_iommu_req_tail tail;
|
||||
};
|
||||
|
||||
struct virtio_iommu_req_unmap {
|
||||
struct virtio_iommu_req_head head;
|
||||
__le32 domain;
|
||||
__le64 virt_start;
|
||||
__le64 virt_end;
|
||||
__u8 reserved[4];
|
||||
struct virtio_iommu_req_tail tail;
|
||||
};
|
||||
|
||||
#define VIRTIO_IOMMU_PROBE_T_NONE 0
|
||||
#define VIRTIO_IOMMU_PROBE_T_RESV_MEM 1
|
||||
|
||||
#define VIRTIO_IOMMU_PROBE_T_MASK 0xfff
|
||||
|
||||
struct virtio_iommu_probe_property {
|
||||
__le16 type;
|
||||
__le16 length;
|
||||
};
|
||||
|
||||
#define VIRTIO_IOMMU_RESV_MEM_T_RESERVED 0
|
||||
#define VIRTIO_IOMMU_RESV_MEM_T_MSI 1
|
||||
|
||||
struct virtio_iommu_probe_resv_mem {
|
||||
struct virtio_iommu_probe_property head;
|
||||
__u8 subtype;
|
||||
__u8 reserved[3];
|
||||
__le64 start;
|
||||
__le64 end;
|
||||
};
|
||||
|
||||
struct virtio_iommu_req_probe {
|
||||
struct virtio_iommu_req_head head;
|
||||
__le32 endpoint;
|
||||
__u8 reserved[64];
|
||||
|
||||
__u8 properties[];
|
||||
|
||||
/*
|
||||
* Tail follows the variable-length properties array. No padding,
|
||||
* property lengths are all aligned on 8 bytes.
|
||||
*/
|
||||
};
|
||||
|
||||
/* Fault types */
|
||||
#define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0
|
||||
#define VIRTIO_IOMMU_FAULT_R_DOMAIN 1
|
||||
#define VIRTIO_IOMMU_FAULT_R_MAPPING 2
|
||||
|
||||
#define VIRTIO_IOMMU_FAULT_F_READ (1 << 0)
|
||||
#define VIRTIO_IOMMU_FAULT_F_WRITE (1 << 1)
|
||||
#define VIRTIO_IOMMU_FAULT_F_EXEC (1 << 2)
|
||||
#define VIRTIO_IOMMU_FAULT_F_ADDRESS (1 << 8)
|
||||
|
||||
struct virtio_iommu_fault {
|
||||
__u8 reason;
|
||||
__u8 reserved[3];
|
||||
__le32 flags;
|
||||
__le32 endpoint;
|
||||
__u8 reserved2[4];
|
||||
__le64 address;
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue