diff options
| author | Ankit Agrawal <ankita@nvidia.com> | 2024-03-08 14:55:24 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-03-12 17:56:55 -0400 |
| commit | 0a5b5acdf2d8c7302ca48d42e6ef3423e1b956d5 (patch) | |
| tree | 28354b8134afcb1cf92b068e12a5c5dc145fdf2b /include/hw | |
| parent | b64b7ed8bb5d475eab3b4188ef0076e332937c62 (diff) | |
hw/acpi: Implement the SRAT GI affinity structure
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>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/acpi/acpi_generic_initiator.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/hw/acpi/acpi_generic_initiator.h b/include/hw/acpi/acpi_generic_initiator.h index 16de1d3d80..a304bad73e 100644 --- a/include/hw/acpi/acpi_generic_initiator.h +++ b/include/hw/acpi/acpi_generic_initiator.h @@ -19,4 +19,29 @@ typedef struct AcpiGenericInitiator { uint16_t node; } AcpiGenericInitiator; +/* + * ACPI 6.3: + * Table 5-81 Flags – Generic Initiator Affinity Structure + */ +typedef enum { + /* + * If clear, the OSPM ignores the contents of the Generic + * Initiator/Port Affinity Structure. This allows system firmware + * to populate the SRAT with a static number of structures, but only + * enable them as necessary. + */ + GEN_AFFINITY_ENABLED = (1 << 0), +} GenericAffinityFlags; + +/* + * ACPI 6.3: + * Table 5-80 Device Handle - PCI + */ +typedef struct PCIDeviceHandle { + uint16_t segment; + uint16_t bdf; +} PCIDeviceHandle; + +void build_srat_generic_pci_initiator(GArray *table_data); + #endif |