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envelope-from=ankita@nvidia.com; helo=NAM12-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @Nvidia.com) X-ZM-MESSAGEID: 1699383783804100003 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ankit Agrawal NVIDIA GPU's support MIG (Mult-Instance GPUs) feature [1], which allows partitioning of the GPU device resources (including device memory) into several (upto 8) isolated instances. Each of the partitioned memory needs a dedicated NUMA node to operate. The partitions are not fixed and they can be created/deleted at runtime. Unfortunately Linux OS does not provide a means to dynamically create/destr= oy NUMA nodes and such feature implementation is not expected to be trivial. T= he nodes that OS discovers at the boot time while parsing SRAT remains fixed. = So we utilize the Generic Initiator Affinity structures that allows association between nodes and devices. Multiple GI structures per BDF is possible, allowing creation of multiple nodes by exposing unique PXM in each of these structures. Introduce a new acpi-generic-initiator object to allow host admin provide t= he device and the corresponding NUMA nodes. Qemu maintain this association and use this object to build the requisite GI Affinity Structure. An admin can provide the range of nodes using a ':' delimited numalist and link it to a device by providing its id. The node ids are extracted from numalist and stores as a uint16List. The following sample creates 8 nodes and link them to the device dev0: -numa node,nodeid=3D2 \ -numa node,nodeid=3D3 \ -numa node,nodeid=3D4 \ -numa node,nodeid=3D5 \ -numa node,nodeid=3D6 \ -numa node,nodeid=3D7 \ -numa node,nodeid=3D8 \ -numa node,nodeid=3D9 \ -device vfio-pci-nohotplug,host=3D0009:01:00.0,bus=3Dpcie.0,addr=3D04.0,rom= bar=3D0,id=3Ddev0 \ -object acpi-generic-initiator,id=3Dgi0,device=3Ddev0,numalist=3D2:3:4:5:6:= 7:8:9 \ [1] https://www.nvidia.com/en-in/technologies/multi-instance-gpu Signed-off-by: Ankit Agrawal --- hw/acpi/acpi-generic-initiator.c | 80 ++++++++++++++++++++++++ hw/acpi/meson.build | 1 + include/hw/acpi/acpi-generic-initiator.h | 29 +++++++++ qapi/qom.json | 16 +++++ 4 files changed, 126 insertions(+) create mode 100644 hw/acpi/acpi-generic-initiator.c create mode 100644 include/hw/acpi/acpi-generic-initiator.h diff --git a/hw/acpi/acpi-generic-initiator.c b/hw/acpi/acpi-generic-initia= tor.c new file mode 100644 index 0000000000..0699c878e2 --- /dev/null +++ b/hw/acpi/acpi-generic-initiator.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved + */ + +#include "qemu/osdep.h" +#include "hw/qdev-properties.h" +#include "qapi/error.h" +#include "qapi/visitor.h" +#include "qom/object_interfaces.h" +#include "qom/object.h" +#include "hw/qdev-core.h" +#include "hw/vfio/vfio-common.h" +#include "hw/vfio/pci.h" +#include "hw/pci/pci_device.h" +#include "sysemu/numa.h" +#include "hw/acpi/acpi-generic-initiator.h" + +OBJECT_DEFINE_TYPE_WITH_INTERFACES(AcpiGenericInitiator, acpi_generic_init= iator, + ACPI_GENERIC_INITIATOR, OBJECT, + { TYPE_USER_CREATABLE }, + { NULL }) + +OBJECT_DECLARE_SIMPLE_TYPE(AcpiGenericInitiator, ACPI_GENERIC_INITIATOR) + +static void acpi_generic_initiator_init(Object *obj) +{ + AcpiGenericInitiator *gi =3D ACPI_GENERIC_INITIATOR(obj); + gi->device =3D NULL; + gi->nodelist =3D NULL; +} + +static void acpi_generic_initiator_finalize(Object *obj) +{ + AcpiGenericInitiator *gi =3D ACPI_GENERIC_INITIATOR(obj); + + g_free(gi->device); + qapi_free_uint16List(gi->nodelist); +} + +static void acpi_generic_initiator_set_device(Object *obj, const char *val, + Error **errp) +{ + AcpiGenericInitiator *gi =3D ACPI_GENERIC_INITIATOR(obj); + + gi->device =3D g_strdup(val); +} + +static void acpi_generic_initiator_set_nodelist(Object *obj, const char *v= al, + Error **errp) +{ + AcpiGenericInitiator *gi =3D ACPI_GENERIC_INITIATOR(obj); + char *value =3D g_strdup(val); + uint16_t node; + uint16List **tail =3D &(gi->nodelist); + char *nodestr =3D value ? strtok(value, ":") : NULL; + + while (nodestr) { + if (sscanf(nodestr, "%hu", &node) !=3D 1) { + error_setg(errp, "failed to read node-id"); + return; + } + + if (node >=3D MAX_NODES) { + error_setg(errp, "invalid node-id"); + return; + } + + QAPI_LIST_APPEND(tail, node); + nodestr =3D strtok(NULL, ":"); + } +} + +static void acpi_generic_initiator_class_init(ObjectClass *oc, void *data) +{ + object_class_property_add_str(oc, ACPI_GENERIC_INITIATOR_DEVICE_PROP, = NULL, + acpi_generic_initiator_set_device); + object_class_property_add_str(oc, ACPI_GENERIC_INITIATOR_NODELIST_PROP, + NULL, acpi_generic_initiator_set_nodelis= t); +} diff --git a/hw/acpi/meson.build b/hw/acpi/meson.build index fc1b952379..2268589519 100644 --- a/hw/acpi/meson.build +++ b/hw/acpi/meson.build @@ -1,5 +1,6 @@ acpi_ss =3D ss.source_set() acpi_ss.add(files( + 'acpi-generic-initiator.c', 'acpi_interface.c', 'aml-build.c', 'bios-linker-loader.c', diff --git a/include/hw/acpi/acpi-generic-initiator.h b/include/hw/acpi/acp= i-generic-initiator.h new file mode 100644 index 0000000000..bb127b2541 --- /dev/null +++ b/include/hw/acpi/acpi-generic-initiator.h @@ -0,0 +1,29 @@ +#ifndef ACPI_GENERIC_INITIATOR_H +#define ACPI_GENERIC_INITIATOR_H + +#include "hw/mem/pc-dimm.h" +#include "hw/acpi/bios-linker-loader.h" +#include "qemu/uuid.h" +#include "hw/acpi/aml-build.h" +#include "qom/object.h" +#include "qom/object_interfaces.h" + +#define TYPE_ACPI_GENERIC_INITIATOR "acpi-generic-initiator" + +#define ACPI_GENERIC_INITIATOR_DEVICE_PROP "device" +#define ACPI_GENERIC_INITIATOR_NODELIST_PROP "nodelist" + +typedef struct AcpiGenericInitiator { + /* private */ + Object parent; + + /* public */ + char *device; + uint16List *nodelist; +} AcpiGenericInitiator; + +typedef struct AcpiGenericInitiatorClass { + ObjectClass parent_class; +} AcpiGenericInitiatorClass; + +#endif diff --git a/qapi/qom.json b/qapi/qom.json index fa3e88c8e6..66d2bffdcc 100644 --- a/qapi/qom.json +++ b/qapi/qom.json @@ -779,6 +779,20 @@ { 'struct': 'VfioUserServerProperties', 'data': { 'socket': 'SocketAddress', 'device': 'str' } } =20 +## +# @AcpiGenericInitiatorProperties: +# +# Properties for acpi-generic-initiator objects. +# +# @device: the ID of the device to be associated with the node +# +# @nodelist: delimited numa node list +# +# Since: 8.2 +## +{ 'struct': 'AcpiGenericInitiatorProperties', + 'data': { 'device': 'str', 'nodelist': 'str' } } + ## # @RngProperties: # @@ -896,6 +910,7 @@ ## { 'enum': 'ObjectType', 'data': [ + 'acpi-generic-initiator', 'authz-list', 'authz-listfile', 'authz-pam', @@ -966,6 +981,7 @@ 'id': 'str' }, 'discriminator': 'qom-type', 'data': { + 'acpi-generic-initiator': 'AcpiGenericInitiatorProperties', 'authz-list': 'AuthZListProperties', 'authz-listfile': 'AuthZListFileProperties', 'authz-pam': 'AuthZPAMProperties', --=20 2.17.1 From nobody Wed Nov 27 10:44:51 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" From: Ankit Agrawal 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 devices and nodes 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 6.5, Section 5.2.16.6 [2] ACPI Spec 6.5, Table 5.66 Signed-off-by: Ankit Agrawal --- hw/acpi/acpi-generic-initiator.c | 79 ++++++++++++++++++++++++ hw/arm/virt-acpi-build.c | 3 + include/hw/acpi/acpi-generic-initiator.h | 21 +++++++ 3 files changed, 103 insertions(+) diff --git a/hw/acpi/acpi-generic-initiator.c b/hw/acpi/acpi-generic-initia= tor.c index 0699c878e2..6d0a8fd818 100644 --- a/hw/acpi/acpi-generic-initiator.c +++ b/hw/acpi/acpi-generic-initiator.c @@ -78,3 +78,82 @@ static void acpi_generic_initiator_class_init(ObjectClas= s *oc, void *data) object_class_property_add_str(oc, ACPI_GENERIC_INITIATOR_NODELIST_PROP, NULL, acpi_generic_initiator_set_nodelis= t); } + +static int acpi_generic_initiator_list(Object *obj, void *opaque) +{ + GSList **list =3D opaque; + + if (object_dynamic_cast(obj, TYPE_ACPI_GENERIC_INITIATOR)) { + *list =3D g_slist_append(*list, ACPI_GENERIC_INITIATOR(obj)); + } + + object_child_foreach(obj, acpi_generic_initiator_list, opaque); + return 0; +} + +/* + * Identify Generic Initiator objects and link them into the list which is + * returned to the caller. + * + * Note: it is the caller's responsibility to free the list to avoid + * memory leak. + */ +static GSList *acpi_generic_initiator_get_list(void) +{ + GSList *list =3D NULL; + + object_child_foreach(object_get_root(), acpi_generic_initiator_list, &= list); + return list; +} + +/* + * ACPI spec, Revision 6.5 + * 5.2.16.6 Generic Initiator Affinity Structure + */ +static +void build_srat_generic_pci_initiator_affinity(GArray *table_data, int nod= e, + PCIDeviceHandle *handle) +{ + uint8_t index; + + build_append_int_noprefix(table_data, 5, 1); /* Type */ + build_append_int_noprefix(table_data, 32, 1); /* Length */ + build_append_int_noprefix(table_data, 0, 1); /* Reserved */ + build_append_int_noprefix(table_data, 1, 1); /* Device Handle Type= */ + build_append_int_noprefix(table_data, node, 4); /* Proximity Domain */ + build_append_int_noprefix(table_data, handle->segment, 2); + build_append_int_noprefix(table_data, handle->bdf, 2); + + /* Reserved */ + for (index =3D 0; index < 12; index++) { + build_append_int_noprefix(table_data, handle->res[index], 1); + } + + build_append_int_noprefix(table_data, GEN_AFFINITY_ENABLED, 4); /* Fla= gs */ + build_append_int_noprefix(table_data, 0, 4); /* Reserved */ +} + +void build_srat_generic_pci_initiator(GArray *table_data) +{ + GSList *gi_list, *list =3D acpi_generic_initiator_get_list(); + for (gi_list =3D list; gi_list; gi_list =3D gi_list->next) { + AcpiGenericInitiator *gi =3D gi_list->data; + Object *o; + uint16List *l; + + o =3D object_resolve_path_type(gi->device, TYPE_VFIO_PCI, NULL); + if (!o) { + continue; + } + + for (l =3D gi->nodelist; l; l =3D l->next) { + PCIDeviceHandle dev_handle =3D {0}; + PCIDevice *pci_dev =3D PCI_DEVICE(o); + dev_handle.bdf =3D PCI_BUILD_BDF(pci_bus_num(pci_get_bus(pci_d= ev)), + pci_dev->devfn); + build_srat_generic_pci_initiator_affinity(table_data, + l->value, &dev_handl= e); + } + } + g_slist_free(list); +} diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 6b674231c2..bd53788cef 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -58,6 +58,7 @@ #include "migration/vmstate.h" #include "hw/acpi/ghes.h" #include "hw/acpi/viot.h" +#include "hw/acpi/acpi-generic-initiator.h" =20 #define ARM_SPI_BASE 32 =20 @@ -558,6 +559,8 @@ build_srat(GArray *table_data, BIOSLinker *linker, Virt= MachineState *vms) } } =20 + build_srat_generic_pci_initiator(table_data); + if (ms->nvdimms_state->is_enabled) { nvdimm_build_srat(table_data); } diff --git a/include/hw/acpi/acpi-generic-initiator.h b/include/hw/acpi/acp= i-generic-initiator.h index bb127b2541..545f46ade5 100644 --- a/include/hw/acpi/acpi-generic-initiator.h +++ b/include/hw/acpi/acpi-generic-initiator.h @@ -26,4 +26,25 @@ typedef struct AcpiGenericInitiatorClass { ObjectClass parent_class; } AcpiGenericInitiatorClass; =20 +/* + * ACPI 6.5: Table 5-68 Flags - Generic Initiator + */ +typedef enum { + GEN_AFFINITY_NOFLAGS =3D 0, + GEN_AFFINITY_ENABLED =3D (1 << 0), + GEN_AFFINITY_ARCH_TRANS =3D (1 << 1), +} GenericAffinityFlags; + +/* + * ACPI 6.5: Table 5-66 Device Handle - PCI + * Device Handle definition + */ +typedef struct PCIDeviceHandle { + uint16_t segment; + uint16_t bdf; + uint8_t res[12]; +} PCIDeviceHandle; + +void build_srat_generic_pci_initiator(GArray *table_data); + #endif --=20 2.17.1