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/openbmc/linux/drivers/fpga/
H A Ddfl-afu-dma-region.c1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for FPGA Accelerated Function Unit (AFU) DMA Region Management
5 * Copyright (C) 2017-2018 Intel Corporation, Inc.
12 #include <linux/dma-mapping.h>
17 #include "dfl-afu.h"
23 afu->dma_regions = RB_ROOT; in afu_dma_region_init()
27 * afu_dma_pin_pages - pin pages of given dma memory region
29 * @region: dma memory region to be pinned
35 struct dfl_afu_dma_region *region) in afu_dma_pin_pages() argument
37 int npages = region->length >> PAGE_SHIFT; in afu_dma_pin_pages()
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/openbmc/bmcweb/redfish-core/schema/dmtf/json-schema/
H A DMemoryRegion.v1_0_3.json4 "$schema": "http://redfish.dmtf.org/schemas/v1/redfish-schema-v1.json",
5 …"copyright": "Copyright 2014-2024 DMTF. For the full DMTF copyright policy, see http://www.dmtf.or…
12 "^([a-zA-Z_][a-zA-Z0-9_]*)?@(odata|Redfish|Message)\\.[a-zA-Z_][a-zA-Z0-9_]*$": {
28 "description": "The available OEM-specific actions for this resource.",
29 …"longDescription": "This property shall contain the available OEM-specific actions for this resour…
36 "description": "Definition of memory chunk providing capacity for memory region.",
37 …tion": "This type shall contain the definition of a memory chunk providing capacity for memory reg…
39 "^([a-zA-Z_][a-zA-Z0-9_]*)?@(odata|Redfish|Message)\\.[a-zA-Z_][a-zA-Z0-9_]*$": {
55 … "description": "The link to the memory chunk providing capacity to the memory region.",
56 … contain a link to a resource of type `MemoryChunks` that provides capacity to the memory region.",
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/openbmc/qemu/docs/devel/
H A Dmemory.rst2 The memory API
5 The memory API models the memory and I/O buses and controllers of a QEMU
8 - ordinary RAM
9 - memory-mapped I/O (MMIO)
10 - memory controllers that can dynamically reroute physical memory regions
13 The memory model provides support for
15 - tracking RAM changes by the guest
16 - setting up coalesced memory for kvm
17 - setting up ioeventfd regions for kvm
19 Memory is modelled as an acyclic graph of MemoryRegion objects. Sinks
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/openbmc/u-boot/lib/
H A Dlmb.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Procedures for maintaining information about logical memory blocks.
20 debug(" memory.cnt = 0x%lx\n", lmb->memory.cnt); in lmb_dump_all()
21 debug(" memory.size = 0x%llx\n", in lmb_dump_all()
22 (unsigned long long)lmb->memory.size); in lmb_dump_all()
23 for (i = 0; i < lmb->memory.cnt; i++) { in lmb_dump_all()
24 debug(" memory.reg[0x%lx].base = 0x%llx\n", i, in lmb_dump_all()
25 (unsigned long long)lmb->memory.region[i].base); in lmb_dump_all()
27 (unsigned long long)lmb->memory.region[i].size); in lmb_dump_all()
31 lmb->reserved.cnt); in lmb_dump_all()
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/openbmc/qemu/include/exec/
H A Dmemory.h2 * Physical memory management API
10 * the COPYING file in the top-level directory.
19 #include "exec/cpu-common.h"
35 #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1)
37 #define TYPE_MEMORY_REGION "memory-region"
41 #define TYPE_IOMMU_MEMORY_REGION "iommu-memory-region"
46 #define TYPE_RAM_DISCARD_MANAGER "ram-discard-manager"
90 * @mr: the region, or %NULL if empty
91 * @fv: the flat view of the address space the region is mapped in
95 * relative to the region's address space
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/openbmc/linux/tools/testing/memblock/tests/
H A Dbasic_api.c1 // SPDX-License-Identifier: GPL-2.0-or-later
17 ASSERT_NE(memblock.memory.regions, NULL); in memblock_initialization_check()
18 ASSERT_EQ(memblock.memory.cnt, 1); in memblock_initialization_check()
19 ASSERT_EQ(memblock.memory.max, EXPECTED_MEMBLOCK_REGIONS); in memblock_initialization_check()
20 ASSERT_EQ(strcmp(memblock.memory.name, "memory"), 0); in memblock_initialization_check()
24 ASSERT_EQ(memblock.memory.max, EXPECTED_MEMBLOCK_REGIONS); in memblock_initialization_check()
36 * A simple test that adds a memory block of a specified base address
37 * and size to the collection of available memory regions (memblock.memory).
38 * Expect to create a new entry. The region counter and total memory get
45 rgn = &memblock.memory.regions[0]; in memblock_add_simple_check()
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H A Dalloc_api.c1 // SPDX-License-Identifier: GPL-2.0-or-later
21 * A simple test that tries to allocate a small memory region.
22 * Expect to allocate an aligned region near the end of the available memory.
34 expected_start = memblock_end_of_DRAM() - SMP_CACHE_BYTES; in alloc_top_down_simple_check()
41 ASSERT_EQ(rgn->size, size); in alloc_top_down_simple_check()
42 ASSERT_EQ(rgn->base, expected_start); in alloc_top_down_simple_check()
53 * A test that tries to allocate memory next to a reserved region that starts at
58 * | +--------+ +--------|
60 * +------------+--------+---------+--------+
65 * The allocation direction is top-down and region arrays are sorted from lower
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/openbmc/bmcweb/redfish-core/schema/dmtf/csdl/
H A DMemoryRegion_v1.xml1 <?xml version="1.0" encoding="UTF-8"?>
2 <!---->
3 <!--################################################################################ -->
4 <!--# Redfish Schema: MemoryRegion v1.0.3 -->
5 <!--# -->
6 <!--# For a detailed change log, see the README file contained in the DSP8010 bundle, -->
7 <!--# available at http://www.dmtf.org/standards/redfish -->
8 <!--# Copyright 2014-2024 DMTF. -->
9 <!--# For the full DMTF copyright policy, see http://www.dmtf.org/about/policies/copyright -->
10 <!--################################################################################ -->
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/openbmc/qemu/include/hw/mem/
H A Dmemory-device.h2 * Memory Device Interface
10 * See the COPYING file in the top-level directory.
16 #include "hw/qdev-core.h"
17 #include "qapi/qapi-types-machine.h"
20 #define TYPE_MEMORY_DEVICE "memory-device"
33 * All memory devices need to implement TYPE_MEMORY_DEVICE as an interface.
35 * A memory device is a device that owns a memory region which is
37 * address in guest physical memory can either be specified explicitly
40 * Some memory device might not own a memory region in certain device
42 * empty memory devices are mostly ignored by the memory device code.
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/openbmc/linux/arch/um/kernel/
H A Dphysmem.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
12 #include <as-layout.h>
18 static int physmem_fd = -1;
50 if (err == -ENOMEM) in map_memory()
53 "memory size>/4096\n"); in map_memory()
60 * setup_physmem() - Setup physical memory for UML
61 * @start: Start address of the physical kernel memory,
63 * @reserve_end: end address of the physical kernel memory.
64 * @len: Length of total physical memory that should be mapped/made
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/openbmc/linux/mm/
H A Dmemblock.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Procedures for maintaining information about logical memory blocks.
39 * Memblock is a method of managing memory regions during the early
40 * boot period when the usual kernel memory allocators are not up and
43 * Memblock views the system memory as collections of contiguous
46 * * ``memory`` - describes the physical memory available to the
47 * kernel; this may differ from the actual physical memory installed
48 * in the system, for instance when the memory is restricted with
50 * * ``reserved`` - describes the regions that were allocated
51 * * ``physmem`` - describes the actual physical memory available during
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/openbmc/linux/Documentation/devicetree/bindings/reserved-memory/
H A Dreserved-memory.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/reserved-memory.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: /reserved-memory Child Node Common
10 - devicetree-spec@vger.kernel.org
13 Reserved memory is specified as a node under the /reserved-memory node. The
14 operating system shall exclude reserved memory from normal usage one can
16 memory regions. Such memory regions are usually designed for the special
19 Each child of the reserved-memory node specifies one or more regions
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H A Dmemory-region.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/memory-region.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Reserved Memory Region
10 - devicetree-spec@vger.kernel.org
13 Regions in the /reserved-memory node may be referenced by other device
14 nodes by adding a memory-region property to the device node.
19 memory-region:
20 $ref: /schemas/types.yaml#/definitions/phandle-array
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/openbmc/u-boot/include/dm/
H A Dof_extra.h1 /* SPDX-License-Identifier: GPL-2.0+ */
27 uint32_t used; /* Number of bytes used in region */
40 * @return 0 if ok, -ve on error
45 * ofnode_decode_region() - Decode a memory region from a node
47 * Look up a property in a node which contains a memory region address and
51 * 32-bit machines.
55 * @param basep Returns base address of region
56 * @param size Returns size of region
57 * @return 0 if ok, -1 on error (property not found)
63 * ofnode_decode_memory_region()- Decode a named region within a memory bank
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/openbmc/linux/include/uapi/linux/
H A Dnitro_enclaves.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
3 * Copyright 2020-2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
16 * NE_CREATE_VM - The command is used to create a slot that is associated with
20 * setting any resources, such as memory and vCPUs, for an
21 * enclave. Memory and vCPUs are set for the slot mapped to an enclave.
25 * Its format is the detailed in the cpu-lists section:
26 * https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
34 * * Enclave file descriptor - Enclave file descriptor used with
35 * ioctl calls to set vCPUs and memory
37 * * -1 - There was a failure in the ioctl logic.
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/openbmc/linux/drivers/acpi/
H A Dnvs.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * nvs.c - Routines for saving and restoring ACPI NVS memory region
5 * Copyright (C) 2008-2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
40 struct nvs_region *region; in acpi_nvs_register() local
42 region = kmalloc(sizeof(*region), GFP_KERNEL); in acpi_nvs_register()
43 if (!region) in acpi_nvs_register()
44 return -ENOMEM; in acpi_nvs_register()
45 region->phys_start = start; in acpi_nvs_register()
46 region->size = size; in acpi_nvs_register()
47 list_add_tail(&region->node, &nvs_region_list); in acpi_nvs_register()
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/openbmc/linux/drivers/net/ipa/
H A Dipa_mem.c1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2023 Linaro Ltd.
10 #include <linux/dma-mapping.h>
23 /* "Canary" value placed between memory regions to detect overflow */
33 for (i = 0; i < ipa->mem_count; i++) { in ipa_mem_find()
34 const struct ipa_mem *mem = &ipa->mem[i]; in ipa_mem_find()
36 if (mem->id == mem_id) in ipa_mem_find()
43 /* Add an immediate command to a transaction that zeroes a memory region */
47 struct ipa *ipa = container_of(trans->gsi, struct ipa, gsi); in ipa_mem_zero_region_add()
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H A Dipa_mem.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2023 Linaro Ltd.
13 * DOC: IPA Local Memory
15 * The IPA has a block of shared memory, divided into regions used for
19 * the "ipa-shared" memory range) and size found in the IPA_SHARED_MEM_SIZE
22 * Each region is optionally preceded by one or more 32-bit "canary" values.
23 * These are meant to detect out-of-range writes (if they become corrupted).
24 * A given region (such as a filter or routing table) has the same number
28 * The set of memory regions is defined in configuration data. They are
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/openbmc/linux/include/linux/
H A Dmemblock.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
6 * Logical memory blocks.
28 * enum memblock_flags - definition of memory region attributes
30 * @MEMBLOCK_HOTPLUG: memory region indicated in the firmware-provided memory
31 * map during early boot as hot(un)pluggable system RAM (e.g., memory range
33 * commandline, try keeping this memory region hotunpluggable. Does not apply
35 * @MEMBLOCK_MIRROR: mirrored region
37 * reserved in the memory map; refer to memblock_mark_nomap() description
39 * @MEMBLOCK_DRIVER_MANAGED: memory region that is always detected and added
40 * via a driver, and never indicated in the firmware-provided memory map as
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/openbmc/linux/tools/testing/selftests/kvm/lib/
H A Dkvm_util.c1 // SPDX-License-Identifier: GPL-2.0-only
39 * flags - The flags to pass when opening KVM_DEV_PATH.
102 * cap - Capability
134 vm->dirty_ring_size = ring_size; in vm_enable_dirty_ring()
139 vm->kvm_fd = _open_kvm_dev_path_or_exit(O_RDWR); in vm_open()
143 vm->fd = __kvm_ioctl(vm->kvm_fd, KVM_CREATE_VM, (void *)vm->type); in vm_open()
144 TEST_ASSERT(vm->fd >= 0, KVM_IOCTL_ERROR(KVM_CREATE_VM, vm->fd)); in vm_open()
150 [VM_MODE_P52V48_4K] = "PA-bits:52, VA-bits:48, 4K pages", in vm_guest_mode_string()
151 [VM_MODE_P52V48_64K] = "PA-bits:52, VA-bits:48, 64K pages", in vm_guest_mode_string()
152 [VM_MODE_P48V48_4K] = "PA-bits:48, VA-bits:48, 4K pages", in vm_guest_mode_string()
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/openbmc/linux/arch/x86/boot/compressed/
H A Dkaslr.c1 // SPDX-License-Identifier: GPL-2.0
8 * handles walking the physical memory maps (and tracking memory regions
9 * to avoid) in order to select a physical memory location that can
41 /* Simplified build-specific string for starting entropy. */
53 hash = (hash << ((sizeof(hash) * 8) - 7)) | (hash >> 7); in rotate_xor()
82 * Store memory limit: MAXMEM on 64-bit and KERNEL_IMAGE_SIZE on 32-bit.
87 /* Number of immovable memory regions */
96 MEM_AVOID_MEMMAP_END = MEM_AVOID_MEMMAP_BEGIN + MAX_MEMMAP_REGIONS - 1,
105 if (one->start + one->size <= two->start) in mem_overlaps()
108 if (one->start >= two->start + two->size) in mem_overlaps()
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/openbmc/phosphor-dbus-interfaces/yaml/xyz/openbmc_project/Inventory/Item/PersistentMemory/
H A DPartition.interface.yaml2 Implement to provide memory partition attributes.
4 - name: PartitionId
7 Unique region ID representing a specific region within the Memory.
8 - name: SizeInKiB
11 Size of this memory region in kibibytes (KiB).
12 - name: MemoryClassification
15 Classification of memory occupied by the given memory region.
16 - name: OffsetInKiB
19 Offset with in the Memory that corresponds to the starting of this
20 memory region in KiB.
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/openbmc/linux/Documentation/PCI/endpoint/
H A Dpci-ntb-function.rst1 .. SPDX-License-Identifier: GPL-2.0
9 PCI Non-Transparent Bridges (NTB) allow two host systems to communicate
12 machine, expose memory ranges as BARs, and perform DMA. They also support
13 scratchpads, which are areas of memory within the NTB that are accessible
26 .. code-block:: text
28 +-------------+ +-------------+
32 +------^------+ +------^------+
35 +---------|-------------------------------------------------|---------+
36 | +------v------+ +------v------+ |
40 | | <-----------------------------------> | |
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/openbmc/linux/Documentation/devicetree/bindings/pmem/
H A Dpmem-region.txt1 Device-tree bindings for persistent memory regions
2 -----------------------------------------------------
4 Persistent memory refers to a class of memory devices that are:
6 a) Usable as main system memory (i.e. cacheable), and
9 Given b) it is best to think of persistent memory as a kind of memory mapped
11 persistent regions separately to the normal memory pool. To aid with that this
13 memory regions exist inside the physical address space.
15 Bindings for the region nodes:
16 -----------------------------
19 - compatible = "pmem-region"
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/openbmc/linux/drivers/gpu/drm/i915/
H A Dintel_region_ttm.c1 // SPDX-License-Identifier: MIT
19 * The code in this file deals with setting up memory managers for TTM
22 * i915 GEM regions to TTM memory types and resource managers.
26 * intel_region_ttm_device_init - Initialize a TTM device
33 struct drm_device *drm = &dev_priv->drm; in intel_region_ttm_device_init()
35 return ttm_device_init(&dev_priv->bdev, i915_ttm_driver(), in intel_region_ttm_device_init()
36 drm->dev, drm->anon_inode->i_mapping, in intel_region_ttm_device_init()
37 drm->vma_offset_manager, false, false); in intel_region_ttm_device_init()
41 * intel_region_ttm_device_fini - Finalize a TTM device
46 ttm_device_fini(&dev_priv->bdev); in intel_region_ttm_device_fini()
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