Hi, On 8/21/20 3:15 PM, Jean-Philippe Brucker wrote: > Add a topology description to the virtio-iommu driver and enable x86 > platforms. > > Since [v2] we have made some progress on adding ACPI support for > virtio-iommu, which is the preferred boot method on x86. It will be a > new vendor-agnostic table describing para-virtual topologies in a > minimal format. However some platforms don't use either ACPI or DT for > booting (for example microvm), and will need the alternative topology > description method proposed here. In addition, since the process to get > a new ACPI table will take a long time, this provides a boot method even > to ACPI-based platforms, if only temporarily for testing and > development. > > v3: > * Add patch 1 that moves virtio-iommu to a subfolder. > * Split the rest: > * Patch 2 adds topology-helper.c, which will be shared with the ACPI > support. > * Patch 4 adds definitions. > * Patch 5 adds parser in topology.c. > * Address other comments. > > Linux and QEMU patches available at: > https://jpbrucker.net/git/linux virtio-iommu/devel > https://jpbrucker.net/git/qemu virtio-iommu/devel I have tested that series with above QEMU branch on ARM with virtio-net and virtio-blk translated devices in non DT mode. It works for me: Tested-by: Eric Auger <eric.auger@xxxxxxxxxx> Thanks Eric > > [spec] https://lists.oasis-open.org/archives/virtio-dev/202008/msg00067.html > [v2] https://lore.kernel.org/linux-iommu/20200228172537.377327-1-jean-philippe@xxxxxxxxxx/ > [v1] https://lore.kernel.org/linux-iommu/20200214160413.1475396-1-jean-philippe@xxxxxxxxxx/ > [rfc] https://lore.kernel.org/linux-iommu/20191122105000.800410-1-jean-philippe@xxxxxxxxxx/ > > Jean-Philippe Brucker (6): > iommu/virtio: Move to drivers/iommu/virtio/ > iommu/virtio: Add topology helpers > PCI: Add DMA configuration for virtual platforms > iommu/virtio: Add topology definitions > iommu/virtio: Support topology description in config space > iommu/virtio: Enable x86 support > > drivers/iommu/Kconfig | 18 +- > drivers/iommu/Makefile | 3 +- > drivers/iommu/virtio/Makefile | 4 + > drivers/iommu/virtio/topology-helpers.h | 50 +++++ > include/linux/virt_iommu.h | 15 ++ > include/uapi/linux/virtio_iommu.h | 44 ++++ > drivers/iommu/virtio/topology-helpers.c | 196 ++++++++++++++++ > drivers/iommu/virtio/topology.c | 259 ++++++++++++++++++++++ > drivers/iommu/{ => virtio}/virtio-iommu.c | 4 + > drivers/pci/pci-driver.c | 5 + > MAINTAINERS | 3 +- > 11 files changed, 597 insertions(+), 4 deletions(-) > create mode 100644 drivers/iommu/virtio/Makefile > create mode 100644 drivers/iommu/virtio/topology-helpers.h > create mode 100644 include/linux/virt_iommu.h > create mode 100644 drivers/iommu/virtio/topology-helpers.c > create mode 100644 drivers/iommu/virtio/topology.c > rename drivers/iommu/{ => virtio}/virtio-iommu.c (99%) >
