| /kernel/linux/linux-5.10/drivers/fpga/ |
| D | dfl-afu-dma-region.c | 1 // 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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| /kernel/linux/linux-6.6/drivers/fpga/ |
| D | dfl-afu-dma-region.c | 1 // 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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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/reserved-memory/ |
| D | reserved-memory.txt | 1 *** Reserved memory regions ***
3 Reserved memory is specified as a node under the /reserved-memory node.
4 The operating system shall exclude reserved memory from normal usage
6 normal use) memory regions. Such memory regions are usually designed for
9 Parameters for each memory region can be encoded into the device tree
12 /reserved-memory node
13 ---------------------
14 #address-cells, #size-cells (required) - standard definition
15 - Should use the same values as the root node
16 ranges (required) - standard definition
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| /kernel/linux/linux-6.6/tools/testing/memblock/tests/ |
| D | basic_api.c | 1 // 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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| D | alloc_api.c | 1 // 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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| /kernel/linux/linux-6.6/arch/um/kernel/ |
| D | physmem.c | 1 // 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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| /kernel/linux/linux-5.10/arch/um/kernel/ |
| D | physmem.c | 1 // 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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| /kernel/linux/linux-5.10/mm/ |
| D | memblock.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Procedures for maintaining information about logical memory blocks.
35 * Memblock is a method of managing memory regions during the early
36 * boot period when the usual kernel memory allocators are not up and
39 * Memblock views the system memory as collections of contiguous
42 * * ``memory`` - describes the physical memory available to the
43 * kernel; this may differ from the actual physical memory installed
44 * in the system, for instance when the memory is restricted with
46 * * ``reserved`` - describes the regions that were allocated
47 * * ``physmem`` - describes the actual physical memory available during
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| /kernel/linux/linux-6.6/mm/ |
| D | memblock.c | 1 // 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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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/reserved-memory/ |
| D | reserved-memory.yaml | 1 # 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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| D | memory-region.yaml | 1 # 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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| /kernel/linux/linux-6.6/include/uapi/linux/ |
| D | nitro_enclaves.h | 1 /* 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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| /kernel/linux/linux-5.10/include/uapi/linux/ |
| D | nitro_enclaves.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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.
39 * * EFAULT - copy_to_user() failure.
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| /kernel/linux/linux-5.10/drivers/acpi/ |
| D | nvs.c | 1 // 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.
38 struct nvs_region *region; in acpi_nvs_register() local
40 region = kmalloc(sizeof(*region), GFP_KERNEL); in acpi_nvs_register()
41 if (!region) in acpi_nvs_register()
42 return -ENOMEM; in acpi_nvs_register()
43 region->phys_start = start; in acpi_nvs_register()
44 region->size = size; in acpi_nvs_register()
45 list_add_tail(®ion->node, &nvs_region_list); in acpi_nvs_register()
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| /kernel/linux/linux-6.6/drivers/acpi/ |
| D | nvs.c | 1 // 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(®ion->node, &nvs_region_list); in acpi_nvs_register()
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| /kernel/linux/linux-6.6/drivers/net/ipa/ |
| D | ipa_mem.c | 1 // 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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| D | ipa_mem.h | 1 /* 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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| /kernel/linux/linux-6.6/include/linux/ |
| D | memblock.h | 1 /* 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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| /kernel/linux/linux-5.10/tools/testing/selftests/kvm/lib/ |
| D | kvm_util.c | 1 // SPDX-License-Identifier: GPL-2.0-only
26 size_t mask = size - 1; in align()
27 TEST_ASSERT(size != 0 && !(size & (size - 1)), in align()
36 * cap - Capability
69 * vm - Virtual Machine
70 * cap - Capability
82 ret = ioctl(vm->fd, KVM_ENABLE_CAP, cap); in vm_enable_cap()
92 * vm - Virtual Machine
93 * vcpu_id - VCPU
94 * cap - Capability
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| /kernel/linux/linux-6.6/tools/testing/selftests/kvm/lib/ |
| D | kvm_util.c | 1 // 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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| /kernel/linux/linux-6.6/arch/x86/boot/compressed/ |
| D | kaslr.c | 1 // 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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| /kernel/linux/linux-5.10/drivers/net/ipa/ |
| D | ipa_mem.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2020 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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| /kernel/linux/linux-5.10/arch/x86/boot/compressed/ |
| D | kaslr.c | 1 // 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
45 /* Simplified build-specific string for starting entropy. */
57 hash = (hash << ((sizeof(hash) * 8) - 7)) | (hash >> 7); in rotate_xor()
86 * Store memory limit: MAXMEM on 64-bit and KERNEL_IMAGE_SIZE on 32-bit.
91 /* Number of immovable memory regions */
100 MEM_AVOID_MEMMAP_END = MEM_AVOID_MEMMAP_BEGIN + MAX_MEMMAP_REGIONS - 1,
109 if (one->start + one->size <= two->start) in mem_overlaps()
112 if (one->start >= two->start + two->size) in mem_overlaps()
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| /kernel/linux/linux-5.10/include/asm-generic/ |
| D | sections.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
12 * _text, _data: architecture specific, don't use them in arch-independent code
50 /* Start and end of .ctors section - used for constructor calls. */
53 /* Start and end of .opd section - used for function descriptors. */
87 * memory can be allocated from it, and such allocations would then have
98 * memory_contains - checks if an object is contained within a memory region
99 * @begin: virtual address of the beginning of the memory region
100 * @end: virtual address of the end of the memory region
101 * @virt: virtual address of the memory object
102 * @size: size of the memory object
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| /kernel/linux/linux-6.6/Documentation/PCI/endpoint/ |
| D | pci-ntb-function.rst | 1 .. 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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