To make the series a bit easier to manage, given that they were fully
acked, I committed patches #1, #2, #6, #7, #8 from the series.
On Tue, 28 Sep 2021, Rahul Singh wrote:
> Hello All,
>
> The purpose of this patch series is to add PCI passthrough support to Xen on
> Arm. PCI passthrough support on ARM is the collaboration work between EPAM and
> ARM. ARM submitted the partial RFC [1][2] last year to get early feedback. We
> tried to fix all the comments and added more features to this patch series.
>
> Working POC with all the features can be found at [3]. Working POC is tested
> on x86 so that there will be no regression on x86. Design presentation can be
> found at [4]
>
> PCI passthrough support is divided into different patches. This patch series
> includes following features:
>
> Preparatory work to implement the PCI passthrough support for the ARM:
> - Refactor MSI code.
> - Fixed compilation error when HAS_PCI enabled for ARM.
>
> Discovering PCI Host Bridge in XEN:
> - PCI init to initialize the PCI driver.
> - PCI host bridge discovery in XEN and map the PCI ECAM configuration space to
> the XEN memory.
> - PCI access functions.
>
> Discovering PCI devices:
> - To support the PCI passthrough, XEN should be aware of the PCI
> devices.
> - Hardware domain is in charge of doing the PCI enumeration and will discover
> the PCI devices and then communicate to the XEN via a hypercall to add the
> PCI devices in XEN.
>
> Enable the existing x86 virtual PCI support for ARM:
> - Add VPCI trap handler for each of the PCI device added for config space
> access.
> - Register the trap handler in XEN for each of the host bridge PCI ECAM config
> space access.
>
> Emulated PCI device tree node in libxl:
> - Create a virtual PCI device tree node in libxl to enable the guest OS to
> discover the virtual PCI during guest boot.
>
> This patch series does not inlcude the following features. Following features
> will be send for review in the next version of the patch series once initial
> patch series merged.
>
> - VPCI support for DOMU guests (Non-identity mappings guest view of the BARs)
> - Virtual bus topology implementation
> - IOMMU related changes (generic, SMMUv2, SMMUv3)
> - MSI support for DOMU guests.
> - Virual ITS support for DOMU guests
>
> [1] https://lists.xenproject.org/archives/html/xen-devel/2020-07/msg01184.html
> [2] https://lists.xenproject.org/archives/html/xen-devel/2020-07/threads.html#01184
> [3] https://gitlab.com/rahsingh/xen-integration/-/commits/pci-passthrough-upstream-all
> [4] https://static.sched.com/hosted_files/xen2021/e4/PCI_Device_Passthrough_On_Arm.pdf
>
> Oleksandr Andrushchenko (1):
> xen/arm: Add support for Xilinx ZynqMP PCI host controller
>
> Rahul Singh (16):
> xen/pci: Refactor MSI code that implements MSI functionality within
> XEN
> xen/arm: pci: Add stubs to allow selecting HAS_PCI
> xen/arm: solve compilation error on ARM with ACPI && HAS_PCI
> xen/arm: xc_domain_ioport_permission(..) not supported on ARM.
> xen/arm: Add PHYSDEVOP_pci_device_* support for ARM
> xen/device-tree: Add dt_property_read_variable_u32_array helper
> xen/device-tree: Add dt_property_read_u32_array helper
> xen/device-tree: Add dt_get_pci_domain_nr helper
> xen/arm: Add support for PCI init to initialize the PCI driver.
> xen/arm: Add cmdline boot option "pci-passthrough = <boolean>"
> xen/arm: PCI host bridge discovery within XEN on ARM
> xen/arm: Implement pci access functions
> xen/arm: Enable the existing x86 virtual PCI support for ARM.
> xen/arm: Transitional change to build HAS_VPCI on ARM.
> arm/libxl: Emulated PCI device tree node in libxl
> xen/arm: Add linux,pci-domain property for hwdom if not available.
>
> docs/misc/xen-command-line.pandoc | 7 +
> tools/include/libxl.h | 6 +
> tools/libs/ctrl/xc_domain.c | 9 +
> tools/libs/light/libxl_arm.c | 105 ++++++++++
> tools/libs/light/libxl_create.c | 3 +
> tools/libs/light/libxl_types.idl | 1 +
> tools/xl/xl_parse.c | 2 +
> xen/arch/arm/Makefile | 2 +
> xen/arch/arm/domain.c | 8 +-
> xen/arch/arm/domain_build.c | 19 ++
> xen/arch/arm/pci/Makefile | 6 +
> xen/arch/arm/pci/ecam.c | 61 ++++++
> xen/arch/arm/pci/pci-access.c | 140 ++++++++++++++
> xen/arch/arm/pci/pci-host-common.c | 287 ++++++++++++++++++++++++++++
> xen/arch/arm/pci/pci-host-generic.c | 46 +++++
> xen/arch/arm/pci/pci-host-zynqmp.c | 63 ++++++
> xen/arch/arm/pci/pci.c | 98 ++++++++++
> xen/arch/arm/physdev.c | 5 +-
> xen/arch/arm/vpci.c | 102 ++++++++++
> xen/arch/arm/vpci.h | 36 ++++
> xen/arch/x86/Kconfig | 1 +
> xen/arch/x86/domain.c | 6 +
> xen/arch/x86/physdev.c | 50 +----
> xen/arch/x86/x86_64/physdev.c | 4 +-
> xen/common/Makefile | 1 +
> xen/common/device_tree.c | 73 +++++++
> xen/common/domain.c | 2 +-
> xen/common/physdev.c | 87 +++++++++
> xen/drivers/passthrough/Makefile | 1 +
> xen/drivers/passthrough/arm/iommu.c | 9 +
> xen/drivers/passthrough/msi.c | 83 ++++++++
> xen/drivers/passthrough/pci.c | 69 +++----
> xen/drivers/pci/Kconfig | 4 +
> xen/drivers/vpci/Makefile | 3 +-
> xen/drivers/vpci/header.c | 2 +
> xen/include/asm-arm/device.h | 1 +
> xen/include/asm-arm/domain.h | 8 +-
> xen/include/asm-arm/hypercall.h | 2 -
> xen/include/asm-arm/numa.h | 5 +
> xen/include/asm-arm/pci.h | 116 ++++++++++-
> xen/include/asm-x86/hypercall.h | 9 +-
> xen/include/asm-x86/pci.h | 10 +-
> xen/include/public/arch-arm.h | 17 ++
> xen/include/public/domctl.h | 4 +-
> xen/include/xen/device_tree.h | 73 +++++++
> xen/include/xen/hypercall.h | 8 +
> xen/include/xen/msi.h | 43 +++++
> xen/include/xen/pci.h | 5 +-
> xen/xsm/flask/hooks.c | 8 +-
> 49 files changed, 1593 insertions(+), 117 deletions(-)
> create mode 100644 xen/arch/arm/pci/Makefile
> create mode 100644 xen/arch/arm/pci/ecam.c
> create mode 100644 xen/arch/arm/pci/pci-access.c
> create mode 100644 xen/arch/arm/pci/pci-host-common.c
> create mode 100644 xen/arch/arm/pci/pci-host-generic.c
> create mode 100644 xen/arch/arm/pci/pci-host-zynqmp.c
> create mode 100644 xen/arch/arm/pci/pci.c
> create mode 100644 xen/arch/arm/vpci.c
> create mode 100644 xen/arch/arm/vpci.h
> create mode 100644 xen/common/physdev.c
> create mode 100644 xen/drivers/passthrough/msi.c
> create mode 100644 xen/include/xen/msi.h
>
> --
> 2.17.1
>