RE: [PATCH v2 0/8] Initial support for SMMUv3 nested translation

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> -----Original Message-----
> From: Shameerali Kolothum Thodi
> Sent: Thursday, August 29, 2024 2:15 PM
> To: 'Nicolin Chen' <nicolinc@xxxxxxxxxx>
> Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>; acpica-devel@xxxxxxxxxxxxxxx;
> Guohanjun (Hanjun Guo) <guohanjun@xxxxxxxxxx>;
> iommu@xxxxxxxxxxxxxxx; Joerg Roedel <joro@xxxxxxxxxx>; Kevin Tian
> <kevin.tian@xxxxxxxxx>; kvm@xxxxxxxxxxxxxxx; Len Brown
> <lenb@xxxxxxxxxx>; linux-acpi@xxxxxxxxxxxxxxx; linux-arm-
> kernel@xxxxxxxxxxxxxxxxxxx; Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx>; Rafael J.
> Wysocki <rafael@xxxxxxxxxx>; Robert Moore <robert.moore@xxxxxxxxx>;
> Robin Murphy <robin.murphy@xxxxxxx>; Sudeep Holla
> <sudeep.holla@xxxxxxx>; Will Deacon <will@xxxxxxxxxx>; Alex Williamson
> <alex.williamson@xxxxxxxxxx>; Eric Auger <eric.auger@xxxxxxxxxx>; Jean-
> Philippe Brucker <jean-philippe@xxxxxxxxxx>; Moritz Fischer
> <mdf@xxxxxxxxxx>; Michael Shavit <mshavit@xxxxxxxxxx>;
> patches@xxxxxxxxxxxxxxx; Mostafa Saleh <smostafa@xxxxxxxxxx>
> Subject: RE: [PATCH v2 0/8] Initial support for SMMUv3 nested translation
> 
> That makes some progress. But still I am not seeing the assigned dev  in
> Guest.
> 
> -device vfio-pci-nohotplug,host=0000:75:00.1,iommufd=iommufd0
> 
> root@ubuntu:/# lspci -tv#
> 
> root@ubuntu:/# lspci -tv
> -+-[0000:ca]---00.0-[cb]--
>  \-[0000:00]-+-00.0  Red Hat, Inc. QEMU PCIe Host bridge
>              +-01.0  Red Hat, Inc Virtio network device
>              +-02.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              +-03.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              +-04.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              +-05.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              +-06.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              +-07.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              +-08.0  Red Hat, Inc. QEMU PCIe Expander bridge
>              \-09.0  Red Hat, Inc. QEMU PCIe Expander bridge
> 
> The new root port is created, but no device attached.
It looks like Guest finds the config invalid:

[    0.283618] PCI host bridge to bus 0000:ca
[    0.284064] ACPI BIOS Error (bug): \_SB.PCF7.PCEE.PCE5.PCDC.PCD3.PCCA._DSM: Excess arguments - ASL declared 5, ACPI requires 4 (20240322/nsarguments-162)
[    0.285533] pci_bus 0000:ca: root bus resource [bus ca]
[    0.286214] pci 0000:ca:00.0: [1b36:000c] type 01 class 0x060400 PCIe Root Port
[    0.287717] pci 0000:ca:00.0: BAR 0 [mem 0x00000000-0x00000fff]
[    0.288431] pci 0000:ca:00.0: PCI bridge to [bus 00]
[    0.290649] pci 0000:ca:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[    0.292476] pci_bus 0000:cb: busn_res: can not insert [bus cb-ca] under [bus ca] (conflicts with (null) [bus ca])
[    0.293597] pci_bus 0000:cb: busn_res: [bus cb-ca] end is updated to cb
[    0.294300] pci_bus 0000:cb: busn_res: can not insert [bus cb] under [bus ca] (conflicts with (null) [bus ca])

Let me know if you have any clue. 

Thanks,
Shameer






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