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/linux/arch/arm64/kernel/
H A Dmte.c1 // SPDX-License-Identifier: GPL-2.0-only
40 struct page *page = pte_page(pte); in mte_sync_tags() local
41 struct folio *folio = page_folio(page); in mte_sync_tags()
47 /* Hugetlb MTE flags are set for head page only */ in mte_sync_tags()
49 for (i = 0; i < nr; i++, page++) in mte_sync_tags()
50 mte_clear_page_tags(page_address(page)); in mte_sync_tags()
61 for (i = 0; i < nr_pages; i++, page++) { in mte_sync_tags()
62 if (try_page_mte_tagging(page)) { in mte_sync_tags()
63 mte_clear_page_tags(page_address(page)); in mte_sync_tags()
64 set_page_mte_tagged(page); in mte_sync_tags()
[all …]
/linux/Documentation/admin-guide/mm/
H A Duserfaultfd.rst8 Userfaults allow the implementation of on-demand paging from userland
10 memory page faults, something otherwise only the kernel code could do.
19 regions of virtual memory with it. Then, any page faults which occur within the
38 Vmas are not suitable for page- (or hugepage) granular fault tracking
48 is a corner case that would currently return ``-EBUSY``).
54 ----------------------
58 handle kernel page faults have been a useful tool for exploiting the kernel).
63 - Any user can always create a userfaultfd which traps userspace page faults
67 - In order to also trap kernel page faults for the address space, either the
77 filesystem permissions (user/group/mode), which gives fine grained access to
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H A Dpagemap.rst2 Examining Process Page Tables
6 userspace programs to examine the page tables and related information by
12 physical frame each virtual page is mapped to. It contains one 64-bit
13 value for each virtual page, containing the following data (from
16 * Bits 0-54 page frame number (PFN) if present
17 * Bits 0-4 swap type if swapped
18 * Bits 5-54 swap offset if swapped
19 * Bit 55 pte is soft-dirty (see
20 Documentation/admin-guide/mm/soft-dirty.rst)
21 * Bit 56 page exclusively mapped (since 4.2)
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/linux/Documentation/virt/kvm/devices/
H A Ds390_flic.rst1 .. SPDX-License-Identifier: GPL-2.0
7 FLIC handles floating (non per-cpu) interrupts, i.e. I/O, service and some
8 machine check interruptions. All interrupts are stored in a per-vm list of
14 - add interrupts (KVM_DEV_FLIC_ENQUEUE)
15 - inspect currently pending interrupts (KVM_FLIC_GET_ALL_IRQS)
16 - purge all pending floating interrupts (KVM_DEV_FLIC_CLEAR_IRQS)
17 - purge one pending floating I/O interrupt (KVM_DEV_FLIC_CLEAR_IO_IRQ)
18 - enable/disable for the guest transparent async page faults
19 - register and modify adapter interrupt sources (KVM_DEV_FLIC_ADAPTER_*)
20 - modify AIS (adapter-interruption-suppression) mode state (KVM_DEV_FLIC_AISM)
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/linux/mm/kasan/
H A Dhw_tags.c1 // SPDX-License-Identifier: GPL-2.0
3 * This file contains core hardware tag-based KASAN code.
49 * Whether the selected mode is synchronous, asynchronous, or asymmetric.
88 return -EINVAL; in early_kasan_flag()
95 return -EINVAL; in early_kasan_flag()
101 /* kasan.mode=sync/async/asymm */
105 return -EINVAL; in early_kasan_mode()
109 else if (!strcmp(arg, "async")) in early_kasan_mode()
114 return -EINVAL; in early_kasan_mode()
118 early_param("kasan.mode", early_kasan_mode);
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/linux/tools/testing/selftests/arm64/mte/
H A Dcheck_ksm_options.c1 // SPDX-License-Identifier: GPL-2.0
89 max_loop_count--; in mte_ksm_scan()
98 static int check_madvise_options(int mem_type, int mode, int mapping) in check_madvise_options() argument
104 if (access(PATH_KSM, F_OK) == -1) { in check_madvise_options()
109 mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG, false); in check_madvise_options()
124 (read_sysfs(PATH_KSM "pages_sharing") < (TEST_UNIT - 1))) in check_madvise_options()
140 ksft_print_msg("ERR: Unable to get page size\n"); in main()
154 "Check KSM mte page merge for private mapping, sync mode and mmap memory\n"); in main()
156 "Check KSM mte page merge for private mapping, async mode and mmap memory\n"); in main()
158 "Check KSM mte page merge for shared mapping, sync mode and mmap memory\n"); in main()
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H A Dcheck_buffer_fill.c1 // SPDX-License-Identifier: GPL-2.0
17 1, 555, 1033, MT_GRANULE_SIZE - 1, MT_GRANULE_SIZE,
18 /* page size - 1*/ 0, /* page_size */ 0, /* page size + 1 */ 0
28 static int check_buffer_by_byte(int mem_type, int mode) in check_buffer_by_byte() argument
34 mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG, false); in check_buffer_by_byte()
41 mte_initialize_current_context(mode, (uintptr_t)ptr, sizes[i]); in check_buffer_by_byte()
63 static int check_buffer_underflow_by_byte(int mem_type, int mode, in check_buffer_underflow_by_byte() argument
71 mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG, false); in check_buffer_underflow_by_byte()
80 mte_initialize_current_context(mode, (uintptr_t)ptr, -underflow_range); in check_buffer_underflow_by_byte()
83 for (j = sizes[i] - 1; (j >= -underflow_range) && in check_buffer_underflow_by_byte()
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/linux/mm/
H A Dcompaction.c1 // SPDX-License-Identifier: GPL-2.0
6 * this heavily depends upon page migration to do all the real heavy
9 * Copyright IBM Corp. 2007-2010 Mel Gorman <mel@csn.ul.ie>
17 #include <linux/backing-dev.h>
20 #include <linux/page-isolation.h>
46 * order == -1 is expected when compacting proactively via
53 return order == -1; in is_via_compact_memory()
71 * Page order with-respect-to which proactive compaction
80 #define COMPACTION_HPAGE_ORDER (PMD_SHIFT - PAGE_SHIFT)
83 static struct page *mark_allocated_noprof(struct page *page, unsigned int order, gfp_t gfp_flags) in mark_allocated_noprof() argument
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/linux/arch/sparc/include/asm/
H A Diommu_32.h1 /* SPDX-License-Identifier: GPL-2.0 */
9 #include <asm/page.h>
23 /* First page */
25 volatile unsigned long base; /* Physical base of iopte page table */
30 /* Second page */
31 volatile unsigned long afsr; /* Async-fault status register */
32 volatile unsigned long afar; /* Async-fault physical address */
34 volatile unsigned long sbuscfg0; /* SBUS configuration registers, per-slot */
38 volatile unsigned long mfsr; /* Memory-fault status register */
39 volatile unsigned long mfar; /* Memory-fault physical address */
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/linux/Documentation/gpu/rfc/
H A Di915_vm_bind.rst12 mappings during each submission (as required by older execbuf mode).
18 User has to opt-in for VM_BIND mode of binding for an address space (VM)
34 ------------------------
41 Execbuf ioctl in VM_BIND mode
42 -------------------------------
43 A VM in VM_BIND mode will not support older execbuf mode of binding.
44 The execbuf ioctl handling in VM_BIND mode differs significantly from the
46 Hence, a new execbuf3 ioctl has been added to support VM_BIND mode. (See
52 "dma-buf: Add an API for exporting sync files"
55 The new execbuf3 ioctl only works in VM_BIND mode and the VM_BIND mode only
[all …]
/linux/io_uring/
H A Drw.c1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/blk-mq.h>
41 if (req->flags & REQ_F_SUPPORT_NOWAIT) in io_file_supports_nowait()
47 return vfs_poll(req->file, &pt) & mask; in io_file_supports_nowait()
55 struct compat_iovec __user *uiov = u64_to_user_ptr(rw->addr); in io_iov_compat_buffer_select_prep()
59 return -EFAULT; in io_iov_compat_buffer_select_prep()
60 rw->len = iov.iov_len; in io_iov_compat_buffer_select_prep()
70 if (rw->le in io_iov_buffer_select_prep()
491 umode_t mode = file_inode(req->file)->i_mode; io_rw_should_reissue() local
758 io_async_buf_func(struct wait_queue_entry * wait,unsigned mode,int sync,void * arg) io_async_buf_func() argument
843 io_rw_init_file(struct io_kiocb * req,fmode_t mode,int rw_type) io_rw_init_file() argument
1268 enum hrtimer_mode mode; io_hybrid_iopoll_delay() local
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/linux/drivers/comedi/drivers/
H A Dpcmuio.c1 // SPDX-License-Identifier: GPL-2.0+
4 * Comedi driver for Winsystems PC-104 based 48/96-channel DIO boards.
6 * COMEDI - Linux Control and Measurement Device Interface
12 * Description: Winsystems PC-104 based 48/96-channel DIO boards.
13 * Devices: [Winsystems] PCM-UIO48A (pcmuio48), PCM-UIO96A (pcmuio96)
15 * Updated: Fri, 13 Jan 2006 12:01:01 -0500
18 * A driver for the relatively straightforward-to-program PCM-UIO48A and
19 * PCM-UIO96A boards from Winsystems. These boards use either one or two
20 * (in the 96-DIO version) WS16C48 ASIC HighDensity I/O Chips (HDIO). This
22 * for INPUT or OUTPUT (thus comedi_dio_config can be done on a per-channel
[all …]
H A Dpcmmio.c1 // SPDX-License-Identifier: GPL-2.0+
4 * Driver for Winsystems PC-104 based multifunction IO board.
6 * COMEDI - Linux Control and Measurement Device Interface
12 * Description: A driver for the PCM-MIO multifunction board
13 * Devices: [Winsystems] PCM-MIO (pcmmio)
15 * Updated: Wed, May 16 2007 16:21:10 -0500
18 * A driver for the PCM-MIO multifunction board from Winsystems. This
19 * is a PC-104 based I/O board. It contains four subdevices:
21 * subdevice 0 - 16 channels of 16-bit AI
22 * subdevice 1 - 8 channels of 16-bit AO
[all …]
H A Dquatech_daqp_cs.c1 // SPDX-License-Identifier: GPL-2.0
8 * COMEDI - Linux Control and Measurement Device Interface
13 * ftp://ftp.quatech.com/Manuals/daqp-208.pdf
15 * This manual is for both the DAQP-208 and the DAQP-308.
18 * - A/D conversion
19 * - 8 channels
20 * - 4 gain ranges
21 * - ground ref or differential
22 * - single-shot and timed both supported
23 * - D/A conversion, single-shot
[all …]
H A Dni_pcidio.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Comedi driver for National Instruments PCI-DIO-32HS
5 * COMEDI - Linux Control and Measurement Device Interface
11 * Description: National Instruments PCI-DIO32HS, PCI-6533
14 * Devices: [National Instruments] PCI-DIO-32HS (ni_pcidio)
15 * [National Instruments] PXI-6533, PCI-6533 (pxi-6533)
16 * [National Instruments] PCI-6534 (pci-6534)
24 * DMA mostly works for the PCI-DIO32HS, but only in timed input mode.
26 * The PCI-DIO-32HS/PCI-6533 has a configurable external trigger. Setting
31 * This driver could be easily modified to support AT-MIO32HS and AT-MIO96.
[all …]
/linux/Documentation/driver-api/memory-devices/
H A Dti-gpmc.rst1 .. SPDX-License-Identifier: GPL-2.0
12 * Asynchronous, synchronous, and page mode burst NOR flash devices
14 * Pseudo-SRAM devices
74 3. read async muxed
85 4. read async non-muxed
107 6. read sync non-muxed
118 7. write async muxed
131 8. write async non-muxed
157 10. write sync non-muxed
/linux/drivers/net/ethernet/sfc/siena/
H A Dmcdi.c1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright 2008-2013 Solarflare Communications Inc.
18 * Management-Controller-to-Driver Interface
59 "Enable MCDI logging on newly-probed functions");
66 int rc = -ENOMEM; in efx_siena_mcdi_init()
68 efx->mcdi = kzalloc(sizeof(*efx->mcdi), GFP_KERNEL); in efx_siena_mcdi_init()
69 if (!efx->mcdi) in efx_siena_mcdi_init()
73 mcdi->efx = efx; in efx_siena_mcdi_init()
75 /* consuming code assumes buffer is page-sized */ in efx_siena_mcdi_init()
76 mcdi->logging_buffer = (char *)__get_free_page(GFP_KERNEL); in efx_siena_mcdi_init()
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/linux/drivers/net/ethernet/sfc/
H A Dmcdi.c1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright 2008-2013 Solarflare Communications Inc.
17 * Management-Controller-to-Driver Interface
57 "Enable MCDI logging on newly-probed functions");
64 int rc = -ENOMEM; in efx_mcdi_init()
66 efx->mcdi = kzalloc(sizeof(*efx->mcdi), GFP_KERNEL); in efx_mcdi_init()
67 if (!efx->mcdi) in efx_mcdi_init()
71 mcdi->efx = efx; in efx_mcdi_init()
73 /* consuming code assumes buffer is page-sized */ in efx_mcdi_init()
74 mcdi->logging_buffer = (char *)__get_free_page(GFP_KERNEL); in efx_mcdi_init()
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/linux/Documentation/driver-api/crypto/iaa/
H A Diaa-crypto.rst1 .. SPDX-License-Identifier: GPL-2.0
18 higher-level compression devices such as zswap.
24 For example, a zswap device can select the IAA 'fixed' mode
25 represented by selecting the 'deflate-iaa' crypto compression
28 # echo deflate-iaa > /sys/module/zswap/parameters/compressor
30 This will tell zswap to use the IAA 'fixed' compression mode for all
34 mode.
36 The 'fixed' compression mode implements the compression scheme
38 'deflate-iaa'. (Because the IAA hardware has a 4k history-window
42 the IAA fixed mode deflate algorithm is given its own algorithm name
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/linux/Documentation/devicetree/bindings/memory-controllers/
H A Darm,pl172.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/arm,pl172.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Frank Li <Frank.Li@nxp.com>
18 - arm,pl172
19 - arm,pl175
20 - arm,pl176
22 - compatible
27 - enum:
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/linux/drivers/infiniband/hw/vmw_pvrdma/
H A Dpvrdma_dev_api.h2 * Copyright (c) 2012-2016 VMware, Inc. All rights reserved.
7 * 2-Clause License. This program is distributed in the hope that it
11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
17 * The BSD 2-Clause License
23 * - Redistributions of source code must retain the above
27 * - Redistributions in binary form must reproduce the above
68 * Masks and accessors for page directory, which is a two-level lookup:
69 * page directory -> page table -> page. Only one directory for now, but we
83 * Max MSI-X vectors.
101 #define PVRDMA_CQ_FLAG_ARMED_SOL BIT(0) /* Armed for solicited-only. */
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/linux/include/linux/platform_data/
H A Dgpmc-omap.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2014 Texas Instruments, Inc. - https://www.ti.com
31 /* Minimum clock period for synchronous mode (in picoseconds) */
34 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
59 u32 access; /* Start-cycle to first data valid delay */
85 * sync & other async
134 #define GPMC_DEVWIDTH_8BIT 1 /* 8-bit device width */
135 #define GPMC_DEVWIDTH_16BIT 2 /* 16-bit device width */
136 #define GPMC_MUX_AAD 1 /* Addr-Addr-Data multiplex */
137 #define GPMC_MUX_AD 2 /* Addr-Data multiplex */
[all …]
/linux/drivers/gpu/drm/omapdrm/
H A Domap_dmm_tiler.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
12 #include <linux/dma-mapping.h>
50 .slot_w = 1 << (SLOT_WIDTH_BITS - (xshift)), \
51 .slot_h = 1 << (SLOT_HEIGHT_BITS - (yshift)), \
55 u32 x_shft; /* unused X-bits (as part of bpp) */
56 u32 y_shft; /* unused Y-bits (as part of bpp) */
68 /* lookup table for registers w/ per-engine instances */
82 tx = dmaengine_prep_dma_memcpy(dmm->wa_dma_chan, dst, src, 4, 0); in dmm_dma_copy()
84 dev_err(dmm->dev, "Failed to prepare DMA memcpy\n"); in dmm_dma_copy()
[all …]
/linux/arch/x86/mm/
H A Dfault.c1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2008-2009, Red Hat Inc., Ingo Molnar
51 return -1; in kmmio_fault()
58 * 32-bit mode:
63 * 64-bit mode:
82 * In X86_64 long mode, the CPU will signal invalid in check_prefetch_opcode()
90 * In 64-bit mode 0x40..0x4F are valid REX prefixes in check_prefetch_opcode()
118 c->x86_vendor == X86_VENDOR_AMD && in is_amd_k8_pre_npt()
119 c->x86 == 0xf && c->x86_model < 0x40); in is_amd_k8_pre_npt()
129 /* Erratum #91 affects AMD K8, pre-NPT CPUs */ in is_prefetch()
[all …]
/linux/include/linux/
H A Dwriteback.h1 /* SPDX-License-Identifier: GPL-2.0 */
12 #include <linux/backing-dev-defs.h>
31 * fs/fs-writeback.c
46 this for each page written */
50 * For a_ops->writepages(): if start or end are non-zero then this is
61 unsigned tagged_writepages:1; /* tag-and-write to avoid livelock */
67 * When writeback IOs are bounced through async layers, only the
74 /* internal fields used by the ->writepages implementation: */
97 if (wbc->sync_mode == WB_SYNC_ALL) in wbc_to_write_flags()
99 else if (wbc->for_kupdate || wbc->for_background) in wbc_to_write_flags()
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