On Wed, May 15, 2024 at 06:28:15PM +0000, Vidya Sagar wrote: > Thanks, Jean for this series. > May I know the current status of it? > Although it was actively reviewed, I see that its current status is set to > 'Handled Elsewhere' in https://patchwork.kernel.org/project/linux-pci/list/?series=848836&state=* > What is the plan to get this series accepted? I probably marked it "handled elsewhere" in the PCI patchwork because it doesn't touch PCI files (the binding has already been reviewed by Rob and Liviu), so I assumed the iommu folks would take the series. I don't know how they track patches. The merge window is open now, so likely they would wait until the next cycle so it would have some time in linux-next, but that's up to them. > > -----Original Message----- > > From: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx> > > Sent: Monday, April 29, 2024 5:10 PM > > To: will@xxxxxxxxxx; lpieralisi@xxxxxxxxxx; kw@xxxxxxxxx; robh@xxxxxxxxxx; > > bhelgaas@xxxxxxxxxx; krzk+dt@xxxxxxxxxx; conor+dt@xxxxxxxxxx; > > liviu.dudau@xxxxxxx; sudeep.holla@xxxxxxx; joro@xxxxxxxxxx > > Cc: robin.murphy@xxxxxxx; Nicolin Chen <nicolinc@xxxxxxxxxx>; Ketan Patil > > <ketanp@xxxxxxxxxx>; linux-pci@xxxxxxxxxxxxxxx; linux-arm- > > kernel@xxxxxxxxxxxxxxxxxxx; iommu@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; > > Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx> > > Subject: [PATCH 0/3] Enable PCIe ATS for devicetree boot > > > > External email: Use caution opening links or attachments > > > > > > Before enabling Address Translation Support (ATS) in endpoints, the OS needs to > > confirm that the Root Complex supports it. Obtain this information from the > > firmware description since there is no architected method. ACPI provides a bit via > > IORT tables, so add the devicetree equivalent. > > > > It was discussed a while ago [1], but at the time only a software model supported > > it. Respin it now that hardware is available [2]. > > > > To test this with the Arm RevC model, enable ATS in the endpoint and note that > > ATS is enabled. Address translation is transparent to the OS. > > > > -C pci.pcie_rc.ahci0.endpoint.ats_supported=1 > > > > $ lspci -s 00:1f.0 -vv > > Capabilities: [100 v1] Address Translation Service (ATS) > > ATSCap: Invalidate Queue Depth: 00 > > ATSCtl: Enable+, Smallest Translation Unit: 00 > > > > > > [1] https://lore.kernel.org/linux-iommu/20200213165049.508908-1-jean- > > philippe@xxxxxxxxxx/ > > [2] https://lore.kernel.org/linux-arm-kernel/ZeJP6CwrZ2FSbTYm@Asurada- > > Nvidia/ > > > > Jean-Philippe Brucker (3): > > dt-bindings: PCI: generic: Add ats-supported property > > iommu/of: Support ats-supported device-tree property > > arm64: dts: fvp: Enable PCIe ATS for Base RevC FVP > > > > .../devicetree/bindings/pci/host-generic-pci.yaml | 6 ++++++ > > drivers/iommu/of_iommu.c | 9 +++++++++ > > arch/arm64/boot/dts/arm/fvp-base-revc.dts | 1 + > > 3 files changed, 16 insertions(+) > > > > -- > > 2.44.0 > > >
