aboutsummaryrefslogtreecommitdiff
path: root/hw/arm
diff options
context:
space:
mode:
authorAnkit Agrawal <ankita@nvidia.com>2024-03-08 14:55:24 +0000
committerMichael S. Tsirkin <mst@redhat.com>2024-03-12 17:56:55 -0400
commit0a5b5acdf2d8c7302ca48d42e6ef3423e1b956d5 (patch)
tree28354b8134afcb1cf92b068e12a5c5dc145fdf2b /hw/arm
parentb64b7ed8bb5d475eab3b4188ef0076e332937c62 (diff)
downloadqemu-0a5b5acdf2d8c7302ca48d42e6ef3423e1b956d5.zip
qemu-0a5b5acdf2d8c7302ca48d42e6ef3423e1b956d5.tar.gz
qemu-0a5b5acdf2d8c7302ca48d42e6ef3423e1b956d5.tar.bz2
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 'hw/arm')
-rw-r--r--hw/arm/virt-acpi-build.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 6a1bde6..c3ccfef 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -57,6 +57,7 @@
#include "migration/vmstate.h"
#include "hw/acpi/ghes.h"
#include "hw/acpi/viot.h"
+#include "hw/acpi/acpi_generic_initiator.h"
#include "hw/virtio/virtio-acpi.h"
#include "target/arm/multiprocessing.h"
@@ -504,6 +505,8 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
}
}
+ build_srat_generic_pci_initiator(table_data);
+
if (ms->nvdimms_state->is_enabled) {
nvdimm_build_srat(table_data);
}