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ACPI spec provides a scheme to associate "Generic Initiators" [1] (e.g. heterogeneous processors and accelerators, GPUs, and I/O devices with integrated compute or DMA engines GPUs) with Proximity Domains. This is achieved using Generic Initiator Affinity Structure in SRAT. During bootup, Linux kernel parse the ACPI SRAT to determine the PXM ids and create a NUMA node for each unique PXM ID encountered. Qemu currently do not implement these structures while building SRAT. Add GI structures while building VM ACPI SRAT. The association between device and node are stored using acpi-generic-initiator object. Lookup presence of all such objects and use them to build these structures. The structure needs a PCI device handle [2] that consists of the device BDF. The vfio-pci device corresponding to the acpi-generic-initiator object is located to determine the BDF. [1] ACPI Spec 6.3, Section 5.2.16.6 [2] ACPI Spec 6.3, Table 5.80 Cc: Jonathan Cameron <qemu-devel@nongnu.org> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Cedric Le Goater <clg@redhat.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Ankit Agrawal <ankita@nvidia.com> Message-Id: <20240308145525.10886-3-ankita@nvidia.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> |
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| .. | ||
| acpi-defs.h | ||
| acpi.h | ||
| acpi_aml_interface.h | ||
| acpi_dev_interface.h | ||
| acpi_generic_initiator.h | ||
| aml-build.h | ||
| bios-linker-loader.h | ||
| cpu.h | ||
| cpu_hotplug.h | ||
| cxl.h | ||
| erst.h | ||
| generic_event_device.h | ||
| ghes.h | ||
| ich9.h | ||
| ich9_tco.h | ||
| ipmi.h | ||
| memory_hotplug.h | ||
| pc-hotplug.h | ||
| pci.h | ||
| pcihp.h | ||
| piix4.h | ||
| tpm.h | ||
| utils.h | ||
| vmgenid.h | ||