| /linux/include/uapi/linux/ |
| H A D | tee.h | 2 * Copyright (c) 2015-2016, Linaro Limited
49 #define TEE_GEN_CAP_REG_MEM (1 << 2)/* Supports registering shared memory */
53 #define TEE_MEMREF_NULL ((__u64)(-1)) /* NULL MemRef Buffer */
54 #define TEE_OBJREF_NULL ((__u64)(-1)) /* NULL ObjRef Object */
65 * OP-TEE specific capabilities
70 * struct tee_ioctl_version_data - TEE version
86 * TEE_IOC_VERSION - query version of TEE
95 * struct tee_ioctl_shm_alloc_data - Shared memory allocate argument
96 * @size: [in/out] Size of shared memory to allocate
98 * @id: [out] Identifier of the shared memory
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| /linux/drivers/tee/ |
| H A D | tee_shm.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015-2017, 2019-2021 Linaro Limited
7 #include <linux/dma-buf.h>
8 #include <linux/dma-mapping.h>
28 if (shm->pages) { in release_registered_pages()
29 if (shm->flags & TEE_SHM_USER_MAPPED) in release_registered_pages()
30 unpin_user_pages(shm->pages, shm->num_pages); in release_registered_pages()
32 kfree(shm->pages); in release_registered_pages()
40 if (shm->flags & TEE_SHM_DMA_MEM) { in tee_shm_release()
46 dma_free_pages(&teedev->dev, shm->size, dma_mem->page, in tee_shm_release()
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| /linux/Documentation/devicetree/bindings/reserved-memory/ |
| H A D | xen,shared-memory.txt | 1 * Xen hypervisor reserved-memory binding
3 Expose one or more memory regions as reserved-memory to the guest
5 to be a shared memory area across multiple virtual machines for
8 For each of these pre-shared memory regions, a range is exposed under
9 the /reserved-memory node as a child node. Each range sub-node is named
10 xen-shmem@<address> and has the following properties:
12 - compatible:
13 compatible = "xen,shared-memory-v1"
15 - reg:
16 the base guest physical address and size of the shared memory region
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|
| H A D | qcom,cmd-db.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/qcom,cmd-db.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
12 is stored in a shared memory region and is loaded by the remote processor.
15 controlling shared resources. Depending on the board configuration the shared
17 remote processor and made available in the shared memory.
20 - Bjorn Andersson <bjorn.andersson@linaro.org>
23 - $ref: reserved-memory.yaml
27 const: qcom,cmd-db
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| /linux/tools/testing/selftests/kvm/x86/ |
| H A D | private_mem_conversions_test.c | 1 // SPDX-License-Identifier: GPL-2.0
29 /* Horrific macro so that the line info is captured accurately :-( */
52 * Run memory conversion tests with explicit conversion:
54 * to back/unback private memory. Subsequent accesses by guest to the gpa range
57 * Test memory conversion scenarios with following steps:
58 * 1) Access private memory using private access and verify that memory contents
60 * 2) Convert memory to shared using explicit conversions and ensure that
61 * userspace is able to access the shared regions.
62 * 3) Convert memory back to private using explicit conversions and ensure that
129 /* Memory should be shared by default. */ in guest_test_explicit_conversion()
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| /linux/drivers/net/ipa/ |
| H A D | ipa_qmi_msg.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
4 * Copyright (C) 2018-2024 Linaro Ltd.
18 #define IPA_QMI_INDICATION_REGISTER 0x20 /* modem -> AP request */
19 #define IPA_QMI_INIT_DRIVER 0x21 /* AP -> modem request */
20 #define IPA_QMI_INIT_COMPLETE 0x22 /* AP -> modem indication */
21 #define IPA_QMI_DRIVER_INIT_COMPLETE 0x35 /* modem -> AP request */
28 #define IPA_QMI_INDICATION_REGISTER_REQ_SZ 20 /* -> server handle */
29 #define IPA_QMI_INDICATION_REGISTER_RSP_SZ 7 /* <- server handle */
30 #define IPA_QMI_INIT_DRIVER_REQ_SZ 162 /* client handle -> */
31 #define IPA_QMI_INIT_DRIVER_RSP_SZ 25 /* client handle <- */
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| /linux/tools/testing/selftests/mm/ |
| H A D | hugepage-shm.c | |
| /linux/Documentation/userspace-api/ |
| H A D | unshare.rst | 10 ----------
14 --------
26 -----------
37 outside the confinement of all-or-nothing shared resources of legacy
44 shared at the time of their creation. unshare() was conceptualized by
45 Al Viro in the August of 2000, on the Linux-Kernel mailing list, as part
48 shared resources without creating a new process. unshare() is a natural
53 -----------
57 resources is not possible. Since namespaces are shared by default
59 even non-threaded applications if they have a need to disassociate
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| /linux/drivers/tee/optee/ |
| H A D | optee_rpc_cmd.h | 1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * Copyright (c) 2016-2021, Linaro Limited
14 * RPC communication with tee-supplicant is reversed compared to normal
23 * 1970-01-01 00:00:00 +0000 (UTC).
39 * which instead is sent via a non-secure interrupt.
62 * Allocate a piece of shared memory
64 * [in] value[0].a Type of memory one of
71 /* Memory that can be shared with a non-secure user space application */
73 /* Memory only shared with non-secure kernel */
77 * Free shared memory previously allocated with OPTEE_RPC_CMD_SHM_ALLOC
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| H A D | smc_abi.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015-2021, 2023 Linaro Limited
9 #include <linux/arm-smccc.h>
39 * OP-TEE OS via raw SMCs.
42 * 2. Low level support functions to register shared memory in secure world
43 * 3. Dynamic shared memory pool based on alloc_pages()
50 * A typical OP-TEE private shm allocation is 224 bytes (argument struct
53 * have a handful of these structs allocated at a time. Most memory will
90 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + in from_msg_param_tmp_mem()
91 attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT; in from_msg_param_tmp_mem()
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| /linux/tools/testing/selftests/arm64/mte/ |
| H A D | check_child_memory.c | 1 // SPDX-License-Identifier: GPL-2.0
25 1, 537, 989, 1269, MT_GRANULE_SIZE - 1, MT_GRANULE_SIZE,
26 /* page size - 1*/ 0, /* page_size */ 0, /* page size + 1 */ 0
38 if (child == -1) { in check_child_tag_inheritance()
58 mte_initialize_current_context(mode, (uintptr_t)ptr, -UNDERFLOW); in check_child_tag_inheritance()
59 memset(ptr - UNDERFLOW, '2', UNDERFLOW); in check_child_tag_inheritance()
115 if (fd == -1) in check_child_file_mapping()
126 /* Only mte enabled memory will allow tag insertion */ in check_child_file_mapping()
129 ksft_print_msg("FAIL: Insert tags on file based memory\n"); in check_child_file_mapping()
154 sizes[item - 3] = page_size - 1; in main()
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| /linux/arch/arm/boot/dts/st/ |
| H A D | stm32mp157a-microgea-stm32mp1.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * Copyright (c) STMicroelectronics 2019 - All Rights Reserved
9 compatible = "engicam,microgea-stm32mp1", "st,stm32mp157";
11 memory@c0000000 {
12 device_type = "memory";
16 reserved-memory {
17 #address-cells = <1>;
18 #size-cells = <1>;
22 compatible = "shared-dma-pool";
24 no-map;
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|
| H A D | stm32mp157a-icore-stm32mp1.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * Copyright (c) STMicroelectronics 2019 - All Rights Reserved
9 compatible = "engicam,icore-stm32mp1", "st,stm32mp157";
11 memory@c0000000 {
12 device_type = "memory";
16 reserved-memory {
17 #address-cells = <1>;
18 #size-cells = <1>;
22 compatible = "shared-dma-pool";
24 no-map;
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| /linux/tools/memory-model/Documentation/ |
| H A D | README | 4 Linux-kernel memory model (LKMM) audience might be anywhere from novice
12 If LKMM-specific terms lost you, glossary.txt might help you.
14 o You are new to Linux-kernel concurrency: simple.txt
16 o You have some background in Linux-kernel concurrency, and would
17 like an overview of the types of low-level concurrency primitives
22 o You are familiar with the Linux-kernel concurrency primitives
24 tests: litmus-tests.txt
26 o You need to locklessly access shared variables that are otherwise
30 recipes.txt, but is self-contained.
32 o You are familiar with Linux-kernel concurrency, and would
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| /linux/Documentation/devicetree/bindings/mailbox/ |
| H A D | mailbox.txt | 9 - #mbox-cells: Must be at least 1. Number of cells in a mailbox
15 #mbox-cells = <1>;
22 - mboxes: List of phandle and mailbox channel specifiers.
25 - mbox-names: List of identifier strings for each mailbox channel.
26 - shmem : List of phandle pointing to the shared memory(SHM) area between the
27 users of these mailboxes for IPC, one for each mailbox. This shared
28 memory can be part of any memory reserved for the purpose of this
35 mbox-names = "pwr-ctrl", "rpc";
39 Example with shared memory(shmem):
42 compatible = "mmio-sram";
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| /linux/arch/arm/boot/dts/ti/omap/ |
| H A D | am572x-idk-common.dtsi | 1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
6 #include <dt-bindings/gpio/gpio.h>
7 #include <dt-bindings/interrupt-controller/irq.h>
8 #include "am57xx-idk-common.dtsi"
9 #include "dra74-ipu-dsp-common.dtsi"
12 memory@0 {
13 device_type = "memory";
17 reserved-memory {
18 #address-cells = <2>;
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|
| H A D | dra72-evm.dts | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2014-2016 Texas Instruments Incorporated - https://www.ti.com/
5 #include "dra72-evm-common.dtsi"
6 #include "dra72x-mmc-iodelay.dtsi"
10 memory@0 {
11 device_type = "memory";
15 reserved-memory {
16 #address-cells = <2>;
17 #size-cells = <2>;
20 ipu2_memory_region: ipu2-memory@95800000 {
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|
| /linux/tools/testing/selftests/powerpc/ptrace/ |
| H A D | ptrace-tm-spr.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
10 /* Tracee and tracer shared data */
11 struct shared { struct
18 struct shared *cptr, *pptr; argument
26 FAIL_IF(regs->tm_tfhar != tfhar); in validate_tm_spr()
27 FAIL_IF((regs->tm_texasr == TM_KVM_SCHED) && (regs->tm_tfiar != 0)); in validate_tm_spr()
37 cptr = (struct shared *)shmat(shm_id, NULL, 0); in tm_spr()
46 "bl 4f;" /* $ = TFHAR - 12 */ in tm_spr()
75 : "memory", "r0", "r8", "r31" in tm_spr()
82 if (!cptr->flag) in tm_spr()
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| /linux/drivers/net/ethernet/microsoft/mana/ |
| H A D | shm_channel.c | 1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
17 #define SHMEM_VF_RESET_STATE ((u32)-1)
32 /* Shared memory channel protocol header
38 * direction: 0 for request, VF->PF; 1 for response, PF->VF.
88 return -ETIMEDOUT; in mana_smc_poll_register()
94 void __iomem *base = sc->base; in mana_smc_read_response()
111 dev_err(sc->dev, "Wrong SMC response 0x%x, type=%d, ver=%d\n", in mana_smc_read_response()
113 return -EPROTO; in mana_smc_read_response()
118 dev_err(sc->dev, "SMC operation failed: 0x%x\n", hdr.status); in mana_smc_read_response()
119 return -EPROTO; in mana_smc_read_response()
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| /linux/tools/testing/selftests/futex/functional/ |
| H A D | futex_wait.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
71 /* Testing an anon page shared memory */ in TEST()
85 ksft_print_dbg_msg("Calling shared (page anon) futex_wait on futex: %p\n", futex); in TEST()
91 ksft_print_dbg_msg("Calling shared (page anon) futex_wake on futex: %p\n", futex); in TEST()
94 ksft_test_result_fail("futex_wake shared (page anon) returned: %d %s\n", in TEST()
97 ksft_test_result_pass("futex_wake shared (page anon) succeeds\n"); in TEST()
110 /* Testing a file backed shared memory */ in TEST()
126 ksft_print_dbg_msg("Calling shared (file backed) futex_wait on futex: %p\n", futex); in TEST()
132 ksft_print_dbg_msg("Calling shared (file backed) futex_wake on futex: %p\n", futex); in TEST()
135 ksft_test_result_fail("futex_wake shared (file backed) returned: %d %s\n", in TEST()
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| /linux/Documentation/driver-api/ |
| H A D | ntb.rst | 5 NTB (Non-Transparent Bridge) is a type of PCI-Express bridge chip that connects
6 the separate memory systems of two or more computers to the same PCI-Express
8 registers and memory translation windows, as well as non common features like
9 scratchpad and message registers. Scratchpad registers are read-and-writable
15 Memory windows allow translated read and write access to the peer memory.
36 ----------------------------------------
38 Primary purpose of NTB is to share some piece of memory between at least two
40 mainly used to perform the proper memory window initialization. Typically
41 there are two types of memory window interfaces supported by the NTB API:
48 Memory: Local NTB Port: Peer NTB Port: Peer MMIO:
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| /linux/Documentation/devicetree/bindings/soc/qcom/ |
| H A D | qcom,smem.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm Shared Memory Manager
10 - Andy Gross <agross@kernel.org>
11 - Bjorn Andersson <bjorn.andersson@linaro.org>
14 This binding describes the Qualcomm Shared Memory Manager, a region of
15 reserved-memory used to share data between various subsystems and OSes in
25 memory-region:
27 description: handle to memory reservation for main SMEM memory region.
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| /linux/tools/perf/pmu-events/arch/powerpc/power9/ |
| H A D | marked.json | 10 …eyond the core's L3 data cache. The source could be local/remote/distant memory or another core's …
20 …"BriefDescription": "A Page Table Entry was loaded into the TLB with Shared (S) data from another …
25 …"BriefDescription": "The processor's data cache was reloaded from another chip's memory on the sam…
30 …efDescription": "Completion stall by Dcache miss which resolved from remote chip (cache or memory)"
70 …"BriefDescription": "A Page Table Entry was loaded into the TLB with Shared (S) data from another …
100 …"BriefDescription": "A Page Table Entry was loaded into the TLB with Shared (S) data from another …
120 …"BriefDescription": "The processor's Instruction cache was reloaded from another chip's memory on …
130 …"BriefDescription": "The processor's data cache was reloaded from the local chip's Memory due to a…
180 …"BriefDescription": "The processor's data cache was reloaded with Shared (S) data from another cor…
210 …"BriefDescription": "A Page Table Entry was loaded into the TLB from the local chip's Memory due t…
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| /linux/Documentation/arch/x86/ |
| H A D | sva.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 Shared Virtual Addressing (SVA) with ENQCMD
10 Shared Virtual Addressing (SVA) allows the processor and device to use the
12 addresses to physical addresses. SVA is what PCIe calls Shared Virtual
13 Memory (SVM).
19 application page-faults. For more information please refer to the PCIe
31 Shared Hardware Workqueues
34 Unlike Single Root I/O Virtualization (SR-IOV), Scalable IOV (SIOV) permits
35 the use of Shared Work Queues (SWQ) by both applications and Virtual
40 ID (PASID), which is a 20-bit number defined by the PCIe SIG.
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| /linux/Documentation/arch/powerpc/ |
| H A D | ultravisor.rst | 1 .. SPDX-License-Identifier: GPL-2.0
16 (PVR=0x004e1203) or greater will be PEF-capable. A new ISA release
25 +------------------+
29 +------------------+
31 +------------------+
33 +------------------+
35 +------------------+
75 +---+---+---+---------------+
79 +---+---+---+---------------+
81 +---+---+---+---------------+
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|