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/linux/drivers/misc/
H A Dsram-exec.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * SRAM protect-exec region helper functions
5 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
25 unsigned long base = (unsigned long)part->base; in sram_check_protect_exec()
26 unsigned long end = base + block->size; in sram_check_protect_exec()
29 dev_err(sram->dev, in sram_check_protect_exec()
30 "SRAM pool marked with 'protect-exec' is not page aligned and will not be created.\n"); in sram_check_protect_exec()
31 return -ENOMEM; in sram_check_protect_exec()
40 list_add_tail(&part->list, &exec_pool_list); in sram_add_protect_exec()
47 * sram_exec_copy - copy data to a protected executable region of sram
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H A Dsram.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Generic on-chip SRAM allocation driver
19 #include <soc/at91/atmel-secumod.h>
33 mutex_lock(&part->lock); in sram_read()
34 memcpy_fromio(buf, part->base + pos, count); in sram_read()
35 mutex_unlock(&part->lock); in sram_read()
48 mutex_lock(&part->lock); in sram_write()
49 memcpy_toio(part->base + pos, buf, count); in sram_write()
50 mutex_unlock(&part->lock); in sram_write()
60 part->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY), in sram_add_pool()
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/linux/drivers/gpu/drm/xe/
H A Dxe_hw_engine_group_types.h1 /* SPDX-License-Identifier: MIT */
14 * enum xe_hw_engine_group_execution_mode - possible execution modes of a hw
17 * @EXEC_MODE_LR: execution in long-running mode
26 * struct xe_hw_engine_group - Hardware engine group
33 * @exec_queue_list: list of exec queues attached to this
37 /** @resume_work: worker to resume faulting LR exec queues */
39 /** @resume_wq: workqueue to resume faulting LR exec queues */
42 * @mode_sem: used to protect this group's hardware resources and ensure
H A Dxe_vm_types.h1 /* SPDX-License-Identifier: MIT */
12 #include <linux/dma-resv.h>
49 /** struct xe_userptr - User pointer */
65 /** @unmap_mutex: Mutex protecting dma-unmapping */
69 * write: vm->userptr.notifier_lock in read mode and vm->resv held.
70 * read: vm->userptr.notifier_lock in write mode or vm->resv held.
73 /** @mapped: Whether the @sgt sg-table is dma-mapped. Protected by @unmap_mutex. */
111 * protected by vm->lock, vm->resv and for userptrs,
112 * vm->userptr.notifier_lock for writing. Needs either for reading,
113 * but if reading is done under the vm->lock only, it needs to be held
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H A Dxe_exec_queue.c1 // SPDX-License-Identifier: MIT
43 xe_pxp_exec_queue_remove(gt_to_xe(q->gt)->pxp, q); in __xe_exec_queue_free()
44 if (q->vm) in __xe_exec_queue_free()
45 xe_vm_put(q->vm); in __xe_exec_queue_free()
47 if (q->xef) in __xe_exec_queue_free()
48 xe_file_put(q->xef); in __xe_exec_queue_free()
60 struct xe_gt *gt = hwe->gt; in __xe_exec_queue_alloc()
68 return ERR_PTR(-ENOMEM); in __xe_exec_queue_alloc()
70 kref_init(&q->refcount); in __xe_exec_queue_alloc()
71 q->flags = flags; in __xe_exec_queue_alloc()
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H A Dxe_vm.c1 // SPDX-License-Identifier: MIT
8 #include <linux/dma-fence-array.h>
47 return vm->gpuvm.r_obj; in xe_vm_obj()
51 * xe_vma_userptr_check_repin() - Advisory check for repin needed
56 * without the vm->userptr.notifier_lock held. There is no guarantee that the
60 * Return: 0 if userptr vma is valid, -EAGAIN otherwise; repin recommended.
64 return mmu_interval_check_retry(&uvma->userptr.notifier, in xe_vma_userptr_check_repin()
65 uvma->userptr.notifier_seq) ? in xe_vma_userptr_check_repin()
66 -EAGAIN : 0; in xe_vma_userptr_check_repin()
71 struct xe_vma *vma = &uvma->vma; in xe_vma_userptr_pin_pages()
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H A Dxe_device_types.h1 /* SPDX-License-Identifier: MIT */
3 * Copyright © 2022-2023 Intel Corporation
44 #define GRAPHICS_VER(xe) ((xe)->info.graphics_verx100 / 100)
45 #define MEDIA_VER(xe) ((xe)->info.media_verx100 / 100)
46 #define GRAPHICS_VERx100(xe) ((xe)->info.graphics_verx100)
47 #define MEDIA_VERx100(xe) ((xe)->info.media_verx100)
48 #define IS_DGFX(xe) ((xe)->info.is_dgfx)
59 ((_xe)->info.platform == (_platform) && \
60 (_xe)->info.step.graphics >= (min_step) && \
61 (_xe)->info.step.graphics < (max_step))
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/linux/tools/testing/selftests/exec/
H A Dcheck-exec-tests.sh2 # SPDX-License-Identifier: GPL-2.0
7 # samples/check-exec/inc.c
11 set -u -e -o pipefail
14 exec 2>/dev/null
16 DIR="$(dirname $(readlink -f "$0"))"
29 if [[ ${ret} -ne ${expect} ]]; then
33 if [[ ${ret} -eq 0 && "${out}" != "${EXPECTED_OUTPUT}" ]]; then
49 if [[ ${ret} -ne ${expect} ]]; then
53 if [[ ${ret} -eq 0 && "${out}" != "${EXPECTED_OUTPUT}" ]]; then
67 out="$("$@" ./inc -i < "${script}")" || ret=$?
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/linux/Documentation/gpu/
H A Ddrm-vm-bind-locking.rst1 .. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
30 meta-data. Typically one per client (DRM file-private), or one per
33 associated meta-data. The backing storage of a gpu_vma can either be
34 a GEM object or anonymous or page-cache pages mapped also into the CPU
40 is anonymous or page-cache pages as described above.
43 page-table entries point to that backing store.
47 the :doc:`dma-buf doc </driver-api/dma-buf>`.
53 allows deadlock-safe locking of multiple dma_resvs in arbitrary
55 :doc:`dma-buf doc </driver-api/dma-buf>`.
56 * ``exec function``: An exec function is a function that revalidates all
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/linux/drivers/gpu/drm/
H A Ddrm_gpuvm.c1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
47 * The GPU VA manager internally uses a rb-tree to manage the
62 * entries from within dma-fence signalling critical sections it is enough to
63 * pre-allocate the &drm_gpuva structures.
88 * lists are maintained in order to accelerate locking of dma-resv locks and
112 * implement Vulkan 'Sparse Memory Bindings' - drivers UAPIs often refer to this
150 * created such that those mappings are split up and re-mapped partically.
161 * dma-fence signalling critical path.
172 * by drm_gpuvm_sm_map() - it doesn't cover any arbitrary combinations of these.
180 * old: |-----------| (bo_offset=n)
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/linux/Documentation/userspace-api/
H A Dcheck_exec.rst1 .. SPDX-License-Identifier: GPL-2.0
12 `samples/check-exec/inc.c`_ example.
41 Programs should always perform this check to apply kernel-level checks against
60 To avoid race conditions leading to time-of-check to time-of-use issues,
76 securebits but without relying on any other user-controlled configuration.
103 of any exec securebits:
122 users. That can protect against unintended script executions (e.g. ``sh
123 /tmp/*.sh``). This makes sense for (semi-restricted) user sessions.
131 dm-verity/IPE) but where access rights might not be ready yet. Indeed,
143 .. _samples/check-exec/inc.c:
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H A Dmseal.rst1 .. SPDX-License-Identifier: GPL-2.0
17 such an attacker primitive can break control-flow integrity guarantees
18 since read-only memory that is supposed to be trusted can become writable
29 -----------------------
34 - The start address must be in an allocated VMA.
35 - The start address must be page aligned.
36 - The end address (**addr** + **len**) must be in an allocated VMA.
37 - no gap (unallocated memory) between start and end address.
44 - **0**: Success.
45 - **-EINVAL**:
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/linux/Documentation/devicetree/bindings/arm/omap/
H A Dmpu.txt1 * TI - MPU (Main Processor Unit) subsystem
8 - compatible : Should be "ti,omap3-mpu" for OMAP3
9 Should be "ti,omap4-mpu" for OMAP4
10 Should be "ti,omap5-mpu" for OMAP5
11 - ti,hwmods: "mpu"
14 - sram: Phandle to the ocmcram node
17 - pm-sram: Phandles to ocmcram nodes to be used for power management.
18 First should be type 'protect-exec' for the driver to use to copy
25 - For an OMAP5 SMP system:
28 compatible = "ti,omap5-mpu";
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/linux/Documentation/devicetree/bindings/memory-controllers/ti/
H A Demif.txt3 EMIF - External Memory Interface - is an SDRAM controller used in
11 - compatible : Should be of the form "ti,emif-<ip-rev>" where <ip-rev>
14 "ti,emif-am3352"
15 "ti,emif-am4372"
16 "ti,emif-dra7xx"
17 "ti,emif-keystone"
19 - phy-type : <u32> indicating the DDR phy type. Following are the
24 - device-handle : phandle to a "lpddr2" node representing the memory part
26 - ti,hwmods : For TI hwmods processing and omap device creation
29 - interrupts : interrupt used by the controller
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/linux/Documentation/arch/x86/
H A Dshstk.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Control-flow Enforcement Technology (CET) Shadow Stack
10 Control-flow Enforcement Technology (CET) covers several related x86 processor
12 can protect both applications and the kernel.
20 control-protection fault. IBT verifies indirect CALL/JMP targets are intended
22 Stack and Indirect Branch Tracking. Today in the 64-bit kernel, only userspace
45 from readelf/llvm-readelf output::
47 readelf -n <application> | grep -a SHSTK
60 on a per-thread basis. The enablement status is inherited on clone, so if the
90 -EPERM if any of the passed feature are locked.
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/linux/drivers/gpu/drm/amd/amdgpu/
H A Damdgpu_gem.c32 #include <linux/dma-buf.h>
68 ret = -EINVAL; in amdgpu_gem_add_input_fence()
100 return -ENOENT; in amdgpu_gem_update_timeline_node()
109 return -ENOMEM; in amdgpu_gem_update_timeline_node()
124 struct amdgpu_bo *bo = bo_va ? bo_va->base.bo : NULL; in amdgpu_gem_update_bo_mapping()
125 struct amdgpu_fpriv *fpriv = filp->driver_priv; in amdgpu_gem_update_bo_mapping()
126 struct amdgpu_vm *vm = &fpriv->vm; in amdgpu_gem_update_bo_mapping()
136 if (bo && (bo->tbo.base.resv == vm->root.bo->tbo.base.resv)) in amdgpu_gem_update_bo_mapping()
137 last_update = vm->last_update; in amdgpu_gem_update_bo_mapping()
139 last_update = bo_va->last_pt_update; in amdgpu_gem_update_bo_mapping()
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/linux/fs/
H A Dexec.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/fs/exec.c
9 * #!-checking implemented by tytso.
12 * Demand-loading implemented 01.12.91 - no need to read anything but
14 * "current->executable", and page faults do the actual loading. Clean.
17 * was less than 2 hours work to get demand-loading completely implemented.
20 * current->executable is only used by the procfs. This allows a dispatch
81 /* For vma exec functions. */
94 insert ? list_add(&fmt->lh, &formats) : in __register_binfmt()
95 list_add_tail(&fmt->lh, &formats); in __register_binfmt()
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/linux/include/uapi/linux/
H A Dtaskstats.h1 /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
2 /* taskstats.h - exporting per-task statistics
22 /* Format for per-task data returned to userland when
23 * - a task exits
24 * - listener requests stats for a task
33 * c) add new fields after version comment; maintain 64-bit alignment
76 /* Following four fields atomically updated using task->delays->lock */
88 /* cpu "wall-clock" running time
127 /* Accumulated RSS usage in duration of a task, in MBytes-usecs.
133 __u64 coremem; /* accumulated RSS usage in MB-usec */
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/linux/Documentation/driver-api/
H A Ddma-buf.rst1 Buffer Sharing and Synchronization (dma-buf)
4 The dma-buf subsystem provides the framework for sharing buffers for
14 interact with the three main primitives offered by dma-buf:
16 - dma-buf, representing a sg_table and exposed to userspace as a file
19 - dma-fence, providing a mechanism to signal when an asynchronous
21 - dma-resv, which manages a set of dma-fences for a particular dma-buf
22 allowing implicit (kernel-ordered) synchronization of work to
27 --------------------------------
29 For more details on how to design your subsystem's API for dma-buf use, please
30 see Documentation/userspace-api/dma-buf-alloc-exchange.rst.
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/linux/tools/testing/selftests/drivers/net/
H A Dstats.py2 # SPDX-License-Identifier: GPL-2.0
20 def check_pause(cfg) -> None:
24 ethnl.pause_get({"header": {"dev-index": cfg.ifindex}})
30 data = ethnl.pause_get({"header": {"dev-index": cfg.ifindex,
35 def check_fec(cfg) -> None:
39 ethnl.fec_get({"header": {"dev-index": cfg.ifindex}})
45 data = ethnl.fec_get({"header": {"dev-index": cfg.ifindex,
50 def pkt_byte_sum(cfg) -> None:
65 for key in ['tx-packets', 'tx-bytes', 'rx-packets', 'rx-bytes']:
72 for key in ['tx-packets', 'tx-bytes', 'rx-packets', 'rx-bytes']:
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/linux/Documentation/filesystems/
H A Daffs.rst1 .. SPDX-License-Identifier: GPL-2.0
19 in file names are case-insensitive, as they ought to be.
44 protect
107 Amiga -> Linux:
111 - R maps to r for user, group and others. On directories, R implies x.
113 - W maps to w.
115 - E maps to x.
117 - D is ignored.
119 - H, S and P are always retained and ignored under Linux.
121 - A is cleared when a file is written to.
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/linux/include/linux/
H A Dfsnotify_backend.h1 /* SPDX-License-Identifier: GPL-2.0 */
43 #define FS_OPEN_EXEC 0x00001000 /* File was opened for exec */
57 #define FS_OPEN_EXEC_PERM 0x00040000 /* open/exec event in a permission hook */
60 #define FS_PRE_ACCESS 0x00100000 /* Pre-content access hook */
80 * Directory entry modification events - reported only to directory
93 /* Pre-content events can be used to fill file content */
142 * handle_event - main call for a group to handle an fs event
147 * @dir: optional directory associated with event -
154 * handle_inode_event - simple variant of handle_event() for groups that only
159 * @dir: optional directory associated with event -
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/linux/drivers/net/ethernet/mellanox/mlx5/core/lib/
H A Dcrypto.c1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
7 #define MLX5_CRYPTO_DEK_POOLS_NUM (MLX5_ACCEL_OBJ_TYPE_KEY_NUM - 1)
8 #define type2idx(type) ((type) - 1)
17 _a->num_deks - _a->avail_deks - _a->in_use_deks; })
24 _bulk->avail_deks == _bulk->num_deks; })
36 struct mutex lock; /* protect the following lists, and the bulks */
41 /* No in-used keys, and all need to be synced.
50 spinlock_t destroy_lock; /* protect destroy_list */
87 return dek->obj_id; in mlx5_crypto_dek_get_id()
105 return -EINVAL; in mlx5_crypto_dek_get_key_sz()
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/linux/arch/x86/kvm/mmu/
H A Dspte.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Kernel-based Virtual Machine driver for Linux
71 * KVM can actually enable MMIO caching depends on vendor-specific in kvm_mmu_spte_module_init()
94 u64 gen = kvm_vcpu_memslots(vcpu)->generation & MMIO_SPTE_GEN_MASK; in make_mmio_spte()
99 spte |= vcpu->kvm->arch.shadow_mmio_value | access; in make_mmio_spte()
119 * and only treat UC/UC-/WC pages as MMIO. in kvm_is_mmio_pfn()
124 pfn_to_hpa(pfn + 1) - 1, in kvm_is_mmio_pfn()
132 * is responsible for checking if the SPTE is shadow-present, and for
133 * determining whether or not the caller cares about non-leaf SPTEs.
142 * A/D-disabled SPTEs can be access-tracked by aging, and access-tracked in spte_needs_atomic_update()
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/linux/kernel/time/
H A Dposix-cpu-timers.c1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/posix-timers.h>
20 #include "posix-timers.h"
28 pct->bases[CPUCLOCK_PROF].nextevt = cpu_limit * NSEC_PER_SEC; in posix_cputimers_group_init()
29 pct->timers_active = true; in posix_cputimers_group_init()
35 * tsk->signal->posix_cputimers.bases[clock].nextevt expiration cache if
39 * Returns 0 on success, -ESRCH on failure. Can fail if the task is exiting and
48 return -ESRCH; in update_rlimit_cpu()
102 ret = pid_for_clock(clock, false) ? 0 : -EINVAL; in validate_clock_permissions()
115 return pid_task(timer->it.cpu.pid, clock_pid_type(timer->it_clock)); in cpu_timer_task_rcu()
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