On Mon, 24 Feb 2025, Mykyta Poturai wrote: > This series adds support for R-Car Gen4 PCI host controller. > > To fully support the controller, the following changes were made: > - Generic mechanism to support PCI child buses is added. > - Private data for PCI host bridge and means to access it are added. > > The series also includes a workaround for proper ATU propramming and > optimizations to lessen the performance impact of that workaround. > > The series was tested both as a part of the pci-passthrough patches[1] and > standalone on S4 and V4H boards. > > [1] https://github.com/Deedone/xen/tree/pci_passthrough_wip
Hi Mykyta, I understand the need for this patch series in the context of vPCI and PCI Passthrough. You also mentioned that you tested it as a standalone, meaning without the PCI Passthrough patches. What is the purpose of this patch series without PCI Passthrough? Cheers, Stefano > Oleksandr Andrushchenko (4): > xen/arm: allow PCI host bridge to have private data > xen/arm: make pci_host_common_probe return the bridge > xen/arm: add support for PCI child bus > xen/arm: add support for R-Car Gen4 PCI host controller > > Volodymyr Babchuk (3): > xen/arm: rcar4: add delay after programming ATU > xen/arm: rcar4: add simple optimization to avoid ATU reprogramming > xen/arm: rcar4: program ATU to accesses to all functions > > xen/arch/arm/include/asm/pci.h | 16 +- > xen/arch/arm/pci/Makefile | 1 + > xen/arch/arm/pci/ecam.c | 17 +- > xen/arch/arm/pci/pci-access.c | 37 +- > xen/arch/arm/pci/pci-host-common.c | 106 +++++- > xen/arch/arm/pci/pci-host-generic.c | 2 +- > xen/arch/arm/pci/pci-host-rcar4.c | 542 ++++++++++++++++++++++++++++ > xen/arch/arm/pci/pci-host-zynqmp.c | 2 +- > xen/arch/arm/vpci.c | 91 ++++- > 9 files changed, 764 insertions(+), 50 deletions(-) > create mode 100644 xen/arch/arm/pci/pci-host-rcar4.c > > -- > 2.34.1 >
