| /linux/Documentation/devicetree/bindings/mtd/ |
| H A D | amlogic,meson-nand.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/mtd/amlogic,meson-nand.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - $ref: nand-controller.yaml
13 - liang.yang@amlogic.com
18 - amlogic,meson-gxl-nfc
19 - amlogic,meson-axg-nfc
24 reg-names:
26 - const: nfc
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| /linux/mm/ |
| H A D | Kconfig.debug | 1 # SPDX-License-Identifier: GPL-2.0-only
17 Unmap pages from the kernel linear mapping after free_pages().
22 pages are being allocated and freed, as unexpected state changes
24 use-after-free). The error reports for these checks can be augmented
26 PAGE_OWNER is also selected and enabled on boot.
29 fill the pages with poison patterns after free_pages() and verify
33 pages are not saved to the suspend image.
36 allowing the kernel mapping to be backed by large pages on some
65 Boot with debugging on by default. SLUB boots by default with
67 equivalent to specifying the "slab_debug" parameter on boot.
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| H A D | memblock.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
40 * boot period when the usual kernel memory allocators are not up and
46 * * ``memory`` - describes the physical memory available to the
50 * * ``reserved`` - describes the regions that were allocated
51 * * ``physmem`` - describes the actual physical memory available during
52 * boot regardless of the possible restrictions and memory hot(un)plug;
81 * * memblock_phys_alloc*() - these functions return the **physical**
83 * * memblock_alloc*() - these functions return the **virtual** address
91 * As the system boot progresses, the architecture specific mem_init()
145 for (i = 0, rgn = &memblock_type->regions[0]; \
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| H A D | page_ext.c | 1 // SPDX-License-Identifier: GPL-2.0
23 * At last, enlarging struct page could cause un-wanted system behaviour change.
28 * functions provided by this code. During the boot process, it checks whether
35 * memory allocation at boot-time. The other is optional, init callback, which
40 * boot and extra memory would be unnecessary. In this case, to avoid
45 * none of need callbacks return true, memory isn't needed at all in this boot
50 * extra memory through size in struct page_ext_operations. If it is non-zero,
59 * initialized, even if pages are allocated and used freely. This could
100 * To ensure correct allocation tagging for pages, page_ext should be available
122 if (page_ext_ops[i]->need()) { in invoke_need_callbacks()
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| /linux/Documentation/admin-guide/mm/ |
| H A D | memory-hotplug.rst | 20 - The physical memory available to a machine can be adjusted at runtime, up- or
25 - Replacing hardware, such as DIMMs or whole NUMA nodes, without downtime. One
28 - Reducing energy consumption either by physically unplugging memory modules or
32 used to expose persistent memory, other performance-differentiated memory and
39 -----
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| H A D | numa_memory_policy.rst | 10 supported platforms with Non-Uniform Memory Access architectures since 2.4.?.
16 (``Documentation/admin-guide/cgroup-v1/cpusets.rst``)
19 programming interface that a NUMA-aware application can take advantage of. When
28 ------------------------
38 use "local allocation" described below. However, during boot
41 not to overload the initial boot node with boot-time
45 this is an optional, per-task policy. When defined for a
61 In a multi-threaded task, task policies apply only to the thread
67 A task policy applies only to pages allocated after the policy is
68 installed. Any pages already faulted in by the task when the task
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| /linux/drivers/net/ethernet/mellanox/mlx5/core/ |
| H A D | pagealloc.c | 2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
106 root = xa_load(&dev->priv.page_root_xa, function); in page_root_per_function()
112 return ERR_PTR(-ENOMEM); in page_root_per_function()
114 err = xa_insert(&dev->priv.page_root_xa, function, root, GFP_KERNEL); in page_root_per_function()
138 new = &root->rb_node; in insert_page()
143 if (tfp->addr < addr) in insert_page()
144 new = &parent->rb_left; in insert_page()
145 else if (tfp->addr > addr) in insert_page()
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| /linux/Documentation/virt/kvm/s390/ |
| H A D | s390-pv-boot.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 s390 (IBM Z) Boot/IPL of Protected VMs
8 -------
13 Documentation/virt/kvm/s390/s390-pv.rst for details."
15 On IPL (boot) a small plaintext bootloader is started, which provides
29 direct kernel, ...) without the need to change the boot process.
33 -------
46 The new PV load-device-specific-parameters field specifies all data
52 * AES-XTS Tweak prefix
62 After the initial import of the encrypted data, all defined pages will
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| /linux/Documentation/mm/ |
| H A D | page_owner.rst | 11 and order of pages is stored into certain storage for each page.
12 When we need to know about status of all pages, we can get and analyze
28 allocated base pages, which gives us a quick overview of where the memory
29 is going without the need to screen through all the pages and match the
33 to add "page_owner=on" to your boot cmdline. If the kernel is built
35 boot option, runtime overhead is marginal. If disabled in runtime, it
52 memory system, so, until initialization, many pages can be allocated and
54 pages are investigated and marked as allocated in initialization phase.
57 more accurately. On 2GB memory x86-64 VM box, 13343 early allocated pages
60 un-tracking state.
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| /linux/Documentation/devicetree/bindings/mips/cavium/ |
| H A D | bootbus.txt | 1 * Boot Bus
3 The Octeon Boot Bus is a configurable parallel bus with 8 chip
7 - compatible: "cavium,octeon-3860-bootbus"
11 - reg: The base address of the Boot Bus' register bank.
13 - #address-cells: Must be <2>. The first cell is the chip select
16 - #size-cells: Must be <1>.
18 - ranges: There must be one one triplet of (child-bus-address,
19 parent-bus-address, length) for each active chip select. If the
27 - compatible: "cavium,octeon-3860-bootbus-config"
29 - cavium,cs-index: A single cell indicating the chip select that
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| /linux/arch/powerpc/platforms/powernv/ |
| H A D | opal-fadump.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Firmware-Assisted Dump support on POWER platform (OPAL).
20 #include <asm/fadump-internal.h>
22 #include "opal-fadump.h"
29 * preserving kernel boot is going to process this crash data.
40 if (dn == -FDT_ERR_NOTFOUND) in opal_fadump_dt_scan()
46 prop = of_get_flat_dt_prop(dn, "mpipl-boot", NULL); in opal_fadump_dt_scan()
63 if (be16_to_cpu(opal_fdm_active->registered_regions) == 0) in opal_fadump_dt_scan()
68 pr_err("Failed to get boot memory tag (%lld)\n", ret); in opal_fadump_dt_scan()
77 fadump_conf->boot_mem_top = be64_to_cpu(addr); in opal_fadump_dt_scan()
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| /linux/lib/ |
| H A D | Kconfig.kfence | 1 # SPDX-License-Identifier: GPL-2.0-only
7 bool "KFENCE: low-overhead sampling-based memory safety error detector"
12 KFENCE is a low-overhead sampling-based detector of heap out-of-bounds
13 access, use-after-free, and invalid-free errors. KFENCE is designed
17 See <file:Documentation/dev-tools/kfence.rst> for more details.
33 allocations will be guarded by KFENCE. May be overridden via boot
37 setting "kfence.sample_interval" to a non-zero value enables KFENCE.
45 pages are required; with one containing the object and two adjacent
46 ones used as guard pages.
52 CPU wake-ups if the system is idle, at the risk of a less predictable
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| /linux/mm/kmsan/ |
| H A D | shadow.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2017-2022 Google LLC
22 #define shadow_page_for(page) ((page)->kmsan_shadow)
24 #define origin_page_for(page) ((page)->kmsan_origin)
48 * Dummy load and store pages to be used when the real metadata is unavailable.
49 * There are separate pages for loads and stores, so that every load returns a
61 off = addr64 - VMALLOC_START; in vmalloc_meta()
66 off = addr64 - MODULES_VADD in vmalloc_meta()
175 int pages = 1 << order; kmsan_alloc_page() local
218 kmsan_vmap_pages_range_noflush(unsigned long start,unsigned long end,pgprot_t prot,struct page ** pages,unsigned int page_shift) kmsan_vmap_pages_range_noflush() argument
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| /linux/Documentation/arch/x86/ |
| H A D | tdx.rst | 1 .. SPDX-License-Identifier: GPL-2.0
18 CPU-attested software module called 'the TDX module' runs inside the new
22 TDX also leverages Intel Multi-Key Total Memory Encryption (MKTME) to
23 provide crypto-protection to the VMs. TDX reserves part of MKTME KeyIDs
32 TDX boot-time detection
33 -----------------------
36 boot. Below dmesg shows when TDX is enabled by BIOS::
41 ---------------------------------------
59 Besides initializing the TDX module, a per-cpu initialization SEAMCALL
103 ------------------------------------------
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| /linux/Documentation/dev-tools/ |
| H A D | kfence.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 Kernel Electric-Fence (KFENCE)
7 Kernel Electric-Fence (KFENCE) is a low-overhead sampling-based memory safety
8 error detector. KFENCE detects heap out-of-bounds access, use-after-free, and
9 invalid-free errors.
15 non-production test workloads. One way to quickly achieve a large enough total
19 -----
26 ``kfence.sample_interval`` to non-zero value), configure the kernel with::
38 the kernel boot parameter ``kfence.sample_interval`` in milliseconds. The
46 causes CPU wake-ups when the system is completely idle. This may be undesirable
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| /linux/Documentation/virt/hyperv/ |
| H A D | coco.rst | 1 .. SPDX-License-Identifier: GPL-2.0
5 Hyper-V can create and run Linux guests that are Confidential Computing
9 CoCo VMs on Hyper-V share the generic CoCo VM threat model and security
10 objectives described in Documentation/security/snp-tdx-threat-model.rst. Note
11 that Hyper-V specific code in Linux refers to CoCo VMs as "isolated VMs" or
14 A Linux CoCo VM on Hyper-V requires the cooperation and interaction of the
19 * The hardware runs a version of Windows/Hyper-V with support for CoCo VMs
25 * AMD processor with SEV-SNP. Hyper-V does not run guest VMs with AMD SME,
26 SEV, or SEV-ES encryption, and such encryption is not sufficient for a CoCo
27 VM on Hyper-V.
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| /linux/tools/testing/selftests/mm/ |
| H A D | thuge-gen.c | 1 // SPDX-License-Identifier: GPL-2.0
4 Before running this huge pages for each huge page size must have been
6 For large pages beyond MAX_PAGE_ORDER (like 1GB on x86) boot options must
10 And nothing using huge pages should run in parallel.
12 ipcrm -m by hand, like this
13 sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
36 #define SHM_HUGETLB 04000 /* segment will use huge TLB pages */
75 "cat /sys/kernel/mm/hugepages/hugepages-%lukB/free_hugepages", in show()
110 "/sys/kernel/mm/hugepages/hugepages-%lukB/free_hugepages", in read_free()
121 MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB|flags, -1, 0); in test_mmap()
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| /linux/arch/powerpc/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
5 def_bool PPC64 && $(cc-option, -mabi=elfv2)
8 def_bool PPC64 && $(cc-option, -mcpu=power10 -mprefixed)
11 # Clang has a bug (https://github.com/llvm/llvm-project/issues/62372)
12 # where pcrel code is not generated if -msoft-float, -mno-altivec, or
13 # -mno-vsx options are also given. Without these options, fp/vec
16 def_bool PPC64 && CC_IS_GCC && $(cc-option, -mcpu=power10 -mpcrel)
35 # On Book3S 64, the default virtual address space for 64-bit processes
38 # between bottom-up and top-down allocations for applications that
41 default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
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| /linux/arch/x86/kernel/ |
| H A D | vmlinux.lds.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Historic 32-bit version written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
8 * Copyright (C) 2007-2009 Sam Ravnborg <sam@ravnborg.org>
24 #include <asm-generic/vmlinux.lds.h>
25 #include <asm/asm-offsets.h>
30 #include <asm/boot.h>
41 OUTPUT_ARCH(i386:x86-64)
50 * On 64-bit, align RODATA to 2MB so we retain large page mappings for
54 * to the pages mapping to text and to the pages padding (which are freed) the
56 * pages. For 64-bit, kernel text and kernel identity mappings are different,
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| /linux/arch/alpha/boot/ |
| H A D | bootpz.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * arch/alpha/boot/bootpz.c
10 * based significantly on the arch/alpha/boot/main.c of Linus Torvalds
103 * This function moves into OSF/1 pal-code, and has a temporary
107 * The page table muckery in here depends on the fact that the boot
108 * code has the L1 page table identity-map itself in the second PTE
109 * in the L1 page table. Thus the L1-page is virtually addressable
123 pcb_va->ksp = 0; in pal_init()
124 pcb_va->usp = 0; in pal_init()
125 pcb_va->ptbr = L1[1] >> 32; in pal_init()
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| /linux/Documentation/admin-guide/ |
| H A D | kernel-parameters.txt | 5 avoid prolonged boot times. The lazy option will add
10 at once during boot.
16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nocmcff -- Disable firmware first mode for corrected
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| /linux/drivers/gpu/drm/imagination/ |
| H A D | pvr_fw_mips.h | 1 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
19 * struct pvr_fw_mips_data - MIPS-specific data
23 * @pt_pages: Pages containing MIPS pagetable.
33 /** @boot_code_dma_addr: DMA address of MIPS boot code. */
36 /** @boot_data_dma_addr: DMA address of MIPS boot data. */
|
| /linux/arch/nios2/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
56 defines the maximal power of two of number of pages that can be
82 2 or 4. Any non-aligned load/store instructions will be trapped and
86 comment "Boot options"
97 On some platforms, there is currently no way for the boot loader to
99 some command-line options at build time by entering them here. In
108 override those passed by the boot loader.
120 bool "Passed kernel command line from u-boot"
122 Use bootargs env variable from u-boot for kernel command line.
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| /linux/Documentation/admin-guide/kdump/ |
| H A D | vmcoreinfo.rst | 11 section and used by user-space tools like crash and makedumpfile to
18 ------------------------
25 ---------
32 -----------
39 User-space tools can get the kernel name, host name, kernel release
43 ---------------------
49 ---------------
56 --------------
62 ------
69 -------------
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| /linux/arch/x86/mm/ |
| H A D | init_32.c | 1 // SPDX-License-Identifier: GPL-2.0-only
65 * in non-PAE compilation mode, since the middle layer is folded.
187 BUG_ON(vaddr < fix_to_virt(FIX_KMAP_BEGIN - 1) in page_table_kmap_check()
245 * of max_low_pfn pages, by creating page tables starting from address
270 * First iteration will setup identity mapping using large/small pages in kernel_physical_mapping_init()
279 * "Software should not write to a paging-structure entry in a way in kernel_physical_mapping_init()
309 * Map with big pages if possible, otherwise in kernel_physical_mapping_init()
324 addr2 = (pfn + PTRS_PER_PTE-1) * PAGE_SIZE + in kernel_physical_mapping_init()
325 PAGE_OFFSET + PAGE_SIZE-1; in kernel_physical_mapping_init()
428 * in the 32-bit EFI stub. in sync_initial_page_table()
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