From: Xingang Wang <wangxinga...@huawei.com> These patches add support for configure bypass_iommu on/off for pci root bus, including primary bus and pxb root bus. At present, all root bus will go through iommu when iommu is configured, which is not flexible, because in many situations the need for using iommu and bypass iommu aften exists at the same time.
So this add option to enable/disable bypass_iommu for primary bus and pxb root bus. The bypass_iommu property is set to false default, meaning that devcies will go through iommu if no explicit configuration is added. When bypass_iommu is enabled for the root bus, devices attached to it will bypass iommu, otherwise devices will go through iommu. This feature can be used in this manner: arm: -machine virt,iommu=smmuv3,bypass_iommu=true x86: -machine q35,bypass_iommu=true pxb: -device pxb-pcie,bus_nr=0x10,id=pci.10,bus=pcie.0,bypass_iommu=true History: v3 -> v4: - simplify the logic in building the IORT idmap v2 -> v3: - rebase on top of v6.0.0-rc4 - Took into account Eric's comments, replace with a bypass_iommu proerty - When building the IORT idmap, cover the whole RID space v1 -> v2: - rebase on top of v6.0.0-rc0 - Fix some issues - Took into account Eric's comments, and remove the PCI_BUS_IOMMU flag, replace it with a property in PCIHostState. - Add support for x86 iommu option Xingang Wang (8): hw/pci/pci_host: Allow bypass iommu for pci host hw/pxb: Add a bypass iommu property hw/arm/virt: Add a machine option to bypass iommu for primary bus hw/i386: Add a pc machine option to bypass iommu for primary bus hw/pci: Add pci_bus_range to get bus number range hw/arm/virt-acpi-build: Add explicit IORT idmap for smmuv3 node hw/i386/acpi-build: Add explicit scope in DMAR table hw/i386/acpi-build: Add bypass_iommu check when building IVRS table hw/arm/virt-acpi-build.c | 135 ++++++++++++++++++++++++---- hw/arm/virt.c | 26 ++++++ hw/i386/acpi-build.c | 70 ++++++++++++++- hw/i386/pc.c | 18 ++++ hw/pci-bridge/pci_expander_bridge.c | 3 + hw/pci-host/q35.c | 1 + hw/pci/pci.c | 33 ++++++- hw/pci/pci_host.c | 2 + include/hw/arm/virt.h | 1 + include/hw/i386/pc.h | 1 + include/hw/pci/pci.h | 2 + include/hw/pci/pci_host.h | 1 + 12 files changed, 270 insertions(+), 23 deletions(-) -- 2.19.1
