0a5b5acdf2
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>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
||
/*
|
||
* Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved
|
||
*/
|
||
|
||
#ifndef ACPI_GENERIC_INITIATOR_H
|
||
#define ACPI_GENERIC_INITIATOR_H
|
||
|
||
#include "qom/object_interfaces.h"
|
||
|
||
#define TYPE_ACPI_GENERIC_INITIATOR "acpi-generic-initiator"
|
||
|
||
typedef struct AcpiGenericInitiator {
|
||
/* private */
|
||
Object parent;
|
||
|
||
/* public */
|
||
char *pci_dev;
|
||
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
|