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/linux/Documentation/devicetree/bindings/interrupt-controller/
H A Dintel,ce4100-ioapic.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/intel,ce4100-ioapic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rahul Tanwar <rtanwar@maxlinear.com>
13 Intel's Advanced Programmable Interrupt Controller (APIC) is a
14 family of interrupt controllers. The APIC is a split
15 architecture design, with a local component (LAPIC) integrated
28 [1] https://pdos.csail.mit.edu/6.828/2008/readings/ia32/IA32-3A.pdf
32 const: intel,ce4100-ioapic
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H A Dintel,ce4100-lapic.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/intel,ce4100-lapic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rahul Tanwar <rtanwar@maxlinear.com>
13 Intel's Advanced Programmable Interrupt Controller (APIC) is a
14 family of interrupt controllers. The APIC is a split
15 architecture design, with a local component (LAPIC) integrated
28 [1] https://pdos.csail.mit.edu/6.828/2008/readings/ia32/IA32-3A.pdf
32 const: intel,ce4100-lapic
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/linux/arch/x86/include/asm/
H A Dftrace.h1 /* SPDX-License-Identifier: GPL-2.0 */
39 if (is_endbr((void*)(fentry_ip - ENDBR_INSN_SIZE))) in arch_ftrace_get_symaddr()
40 fentry_ip -= ENDBR_INSN_SIZE; in arch_ftrace_get_symaddr()
54 if (!arch_ftrace_regs(fregs)->regs.cs) in arch_ftrace_get_regs()
56 return &arch_ftrace_regs(fregs)->regs; in arch_ftrace_get_regs()
60 (_regs)->ip = arch_ftrace_regs(fregs)->regs.ip; \
61 (_regs)->sp = arch_ftrace_regs(fregs)->regs.sp; \
62 (_regs)->cs = __KERNEL_CS; \
63 (_regs)->flags = 0; \
67 do { arch_ftrace_regs(fregs)->regs.ip = (_ip); } while (0)
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H A Dentry-common.h1 /* SPDX-License-Identifier: GPL-2.0-only */
6 #include <linux/user-return-notifier.h>
8 #include <asm/nospec-branch.h>
18 * Make sure that the entry code gave us a sensible EFLAGS in arch_enter_from_user_mode()
74 * handling, because syscall restart has a fixup for compat in arch_exit_to_user_mode_prepare()
78 * We also need to clear TS_REGS_POKED_I386: the 32-bit tracer in arch_exit_to_user_mode_prepare()
82 current_thread_info()->status &= ~(TS_COMPAT | TS_I386_REGS_POKED); in arch_exit_to_user_mode_prepare()
89 * arch/x86/Makefile), which will remove the 3 (x86_64) or 2 (ia32) in arch_exit_to_user_mode_prepare()
93 * 8 (ia32) bits. in arch_exit_to_user_mode_prepare()
H A Delf.h1 /* SPDX-License-Identifier: GPL-2.0 */
10 #include <asm/ia32.h>
28 #define R_386_GOT32 3
47 /* x86-64 relocation types */
51 #define R_X86_64_GOT32 3 /* 32 bit GOT entry */
66 #define R_X86_64_PC64 24 /* Place relative 64-bit signed */
86 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
95 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
96 contains a pointer to a function which might be registered using `atexit'.
97 This provides a mean for the dynamic linker to call DT_FINI functions for
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H A Dcpufeatures.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 #define NCAPINTS 22 /* N 32-bit words worth of info */
9 #define NBUGINTS 2 /* N 32-bit bug flags */
12 * Note: If the comment begins with a quoted string, that string is used
17 * please update the table in kernel/cpu/cpuid-deps.c as well.
20 /* Intel-defined CPU features, CPUID level 0x00000001 (EDX), word 0 */
24 #define X86_FEATURE_PSE ( 0*32+ 3) /* "pse" Page Size Extensions */
26 #define X86_FEATURE_MSR ( 0*32+ 5) /* "msr" Model-Specific Registers */
37 #define X86_FEATURE_PSE36 ( 0*32+17) /* "pse36" 36-bit PSEs */
47 #define X86_FEATURE_HT ( 0*32+28) /* "ht" Hyper-Threading */
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/linux/arch/x86/mm/
H A Dpf_in.c1 // SPDX-License-Identifier: GPL-2.0-or-later
18 /* IA32 Manual 3, 2-1 */
23 /* IA32 Manual 3, 3-432*/
29 /* IA32 Manual 3, 3-432*/
46 /* AMD64 Manual 3, Appendix A*/
77 prf->shorted = 0; in skip_prefix()
78 prf->enlarged = 0; in skip_prefix()
79 prf->rexr = 0; in skip_prefix()
80 prf->rex = 0; in skip_prefix()
86 prf->shorted = 1; in skip_prefix()
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/linux/include/linux/
H A Dcper.h1 /* SPDX-License-Identifier: GPL-2.0-only */
29 * handling of a memory error in userspace (we don't carry all the fields
31 * Currently, a length of 256 should be more than enough.
80 /* Non-Maskable Interrupt */
100 * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
107 * CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44
114 * CXL rev 3.0 section 8.2.9.2.1.3; Table 8-45
157 /* If set, the component must be re-initialized or re-enabled prior to use */
208 /* PCI/PCI-X Bus */
282 #define CPER_PCIE_SLOT_SHIFT 3
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/linux/drivers/firmware/efi/
H A Dcper.c1 // SPDX-License-Identifier: GPL-2.0
32 * multiple boot may co-exist in ERST.
43 * but just in case, let's use a few more bits for timestamps in cper_next_record_id()
73 * cper_print_bits - print strings for set bits
103 len += scnprintf(buf+len, sizeof(buf)-len, ", %s", str); in cper_print_bits()
110 "IA32/X64",
116 "IA32",
127 "micro-architectural error",
147 if (proc->validation_bits & CPER_PROC_VALID_TYPE) in cper_print_proc_generic()
148 printk("%s""processor_type: %d, %s\n", pfx, proc->proc_type, in cper_print_proc_generic()
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/linux/include/linux/netfilter/
H A Dnf_conntrack_h323_asn1.h1 /* SPDX-License-Identifier: GPL-2.0-only */
9 * necessary objects in a signal for Linux kernel NAT module use, so don't
10 * expect it to be a full ASN.1 library.
14 * 1. Small. The total size of code plus data is less than 20 KB (IA32).
15 * 2. Fast. Decoding Netmeeting's Setup signal 1 million times on a PIII 866
17 * 3. No memory allocation. It uses a static object. No need to initialize or
26 * If a Setup signal contains more than 30 faststart, the packet size will
28 * don't know how to handle this in a Netfilter module. Anybody can help?
83 #define H323_ERROR_BOUND -1
84 #define H323_ERROR_RANGE -2
/linux/include/acpi/
H A Dactbl1.h1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
4 * Name: actbl1.h - Additional ACPI table definitions
6 * Copyright (C) 2000 - 2025, Intel Corp.
71 * All tables must be byte-packed to match the ACPI specification, since
81 * essentially useless for dealing with packed data in on-disk formats or
83 * this decision was a design error in C. Ritchie could have picked an order
85 * See http://stackoverflow.com/a/1053662/41661
113 /* https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/acpitabl/ns-acpitabl-aspt_table */
144 u8 reserved[3];
167 * ASF - Alert Standard Format table (Signature "ASF!")
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/linux/Documentation/
H A DChanges9 This document is designed to provide a list of the minimum levels of
21 encountered a bug! If you're unsure what version you're currently
25 running a Linux kernel. Also, not all tools are necessary on all
32 GNU C 8.1 gcc --version
33 Clang/LLVM (optional) 15.0.0 clang --version
34 Rust (optional) 1.78.0 rustc --version
35 bindgen (optional) 0.65.1 bindgen -
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/linux/arch/x86/kernel/
H A Didt.c1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <asm/ia32.h>
53 G(_vector, NULL, DEFAULT_STACK, GATE_TASK, DPL0, _gdt << 3)
69 * Not possible on 64-bit. See idt_setup_early_pf() for details.
172 /* Must be page-aligned because the real IDT is used in the cpu entry area */
176 .size = IDT_TABLE_SIZE - 1,
189 return ((address - idt_descr.address) >> 3) == 6; in idt_is_f00f_address()
198 for (; size > 0; t++, size--) { in idt_setup_from_table()
200 write_idt_entry(idt, t->vector, &desc); in idt_setup_from_table()
202 set_bit(t->vector, system_vectors); in idt_setup_from_table()
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H A Dsignal_32.c1 // SPDX-License-Identifier: GPL-2.0
5 * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
6 * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
7 * 2000-12-* x86-64 compatibility mode signal handling by Andi Kleen
38 * and 1 of a segment selector, i.e., the RPL bits, are NOT used to index
39 * GDT, selector values 0~3 all point to the NULL descriptor, thus values
40 * 0, 1, 2 and 3 are all valid NULL selector values.
44 * userspace in pre-FRED systems to spot any interrupt/exception by loading
45 * a nonzero NULL selector and waiting for it to become zero. Before FRED
52 * As such, leave NULL selector values 0~3 unchanged.
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H A Dprocess_64.c1 // SPDX-License-Identifier: GPL-2.0-only
8 * X86-64 port
11 * CPU hotplug support - ashok.raj@intel.com
15 * This file handles the architecture-dependent parts of process handling..
51 #include <asm/ia32.h>
79 if (regs->orig_ax != -1) in __show_regs()
80 pr_cont(" ORIG_RAX: %016lx\n", regs->orig_ax); in __show_regs()
85 log_lvl, regs->ax, regs->bx, regs->cx); in __show_regs()
87 log_lvl, regs->dx, regs->si, regs->di); in __show_regs()
89 log_lvl, regs->bp, regs->r8, regs->r9); in __show_regs()
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H A Dptrace.c1 // SPDX-License-Identifier: GPL-2.0-only
119 * regs_query_register_offset() - query register offset from its name
120 * @name: the name of a register
122 * regs_query_register_offset() returns the offset of a register in struct
123 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
128 for (roff = regoffset_table; roff->name != NULL; roff++) in regs_query_register_offset()
129 if (!strcmp(roff->name, name)) in regs_query_register_offset()
130 return roff->offset; in regs_query_register_offset()
131 return -EINVAL; in regs_query_register_offset()
135 * regs_query_register_name() - query register name from its offset
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/linux/arch/x86/net/
H A Dbpf_jit_comp32.c1 // SPDX-License-Identifier: GPL-2.0
3 * Just-In-Time compiler for eBPF filters on IA32 (32bit x86)
17 #include <asm/nospec-branch.h>
18 #include <asm/asm-prototypes.h>
25 * original ESP => +-----+
27 * +-----+
29 * BPF_FP,IA32_EBP => +-----+
31 * +-----+
33 * current ESP => +-----+
37 * +-----+
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/linux/Documentation/core-api/
H A Dcachetlb.rst12 The side effects described below are stated for a uniprocessor
14 SMP cases are a simple extension, in that you just extend the
15 definition such that the side effect for a particular interface occurs
19 if it can be proven that a user address space has never executed
20 on a cpu (see mm_cpumask()), one need not perform a flush
25 virtual-->physical address translations obtained from the software
53 3) ``void flush_tlb_range(struct vm_area_struct *vma,
56 Here we are flushing a specific range of (user) virtual
59 modifications for the address space 'vma->vm_mm' in the range
60 'start' to 'end-1' will be visible to the cpu. That is, after
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/linux/sound/core/
H A Dcontrol_compat.c1 // SPDX-License-Identifier: GPL-2.0-or-later
31 return -EFAULT; in snd_ctl_elem_list_compat()
33 if (get_user(ptr, &data32->pids)) in snd_ctl_elem_list_compat()
34 return -EFAULT; in snd_ctl_elem_list_compat()
41 return -EFAULT; in snd_ctl_elem_list_compat()
82 struct snd_card *card = ctl->card; in snd_ctl_elem_info_compat()
88 return -ENOMEM; in snd_ctl_elem_info_compat()
91 if (copy_from_user(&data->id, &data32->id, sizeof(data->id))) in snd_ctl_elem_info_compat()
92 return -EFAULT; in snd_ctl_elem_info_compat()
96 if (get_user(data->value.enumerated.item, &data32->value.enumerated.item)) in snd_ctl_elem_info_compat()
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/linux/tools/arch/x86/include/asm/
H A Dcpufeatures.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 #define NCAPINTS 22 /* N 32-bit words worth of info */
9 #define NBUGINTS 2 /* N 32-bit bug flags */
12 * Note: If the comment begins with a quoted string, that string is used
17 * please update the table in kernel/cpu/cpuid-deps.c as well.
20 /* Intel-defined CPU features, CPUID level 0x00000001 (EDX), word 0 */
24 #define X86_FEATURE_PSE ( 0*32+ 3) /* "pse" Page Size Extensions */
26 #define X86_FEATURE_MSR ( 0*32+ 5) /* "msr" Model-Specific Registers */
37 #define X86_FEATURE_PSE36 ( 0*32+17) /* "pse36" 36-bit PSEs */
47 #define X86_FEATURE_HT ( 0*32+28) /* "ht" Hyper-Threading */
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/linux/drivers/misc/lkdtm/
H A Dbugs.c1 // SPDX-License-Identifier: GPL-2.0
28 * a compiler warning when CONFIG_FRAME_WARN is set. Then make sure we
44 * - function marked noinline
45 * - stack variables are marked volatile
46 * - stack variables are written (memset()) and read (buf[..] passed as arg)
47 * - function may have external effects (memzero_explicit())
48 * - no tail recursion possible
59 ret = recursive_loop((int)buf[remaining % sizeof(buf)] - 1); in recursive_loop()
84 * have interrupts disabled and cannot take a regular IPI. in panic_stop_irqoff_fn()
86 * The last CPU which enters here will trigger a panic, and as all CPUs in panic_stop_irqoff_fn()
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/linux/drivers/platform/x86/
H A Dintel_scu_ipc.c1 // SPDX-License-Identifier: GPL-2.0
5 * (C) Copyright 2008-2010,2015 Intel Corporation
10 * SCU has two IPC mechanism IPC-1 and IPC-2. IPC-1 is used between IA32 and
11 * SCU where IPC-2 is used between P-Unit and SCU. This driver delas with
12 * IPC-1 Driver provides an API for power control unit registers (e.g. MSIC)
35 #define IPC_CMD_PCNTRL_M 2 /* Register read-modify-write */
41 * To read or write information to the SCU, driver writes to IPC-1 memory
44 * 1. IA core cDMI interface claims this transaction and converts it to a
48 * the IPC-1 register block, causing an interrupt to the SCU
50 * 3. SCU firmware decodes this interrupt and IPC message and the appropriate
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/linux/arch/x86/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 bool "64-bit kernel" if "$(ARCH)" = "x86"
7 Say yes to build a 64-bit kernel - formerly known as x86_64
8 Say no to build a 32-bit kernel - formerly known as i386
13 # Options that are inherently 32-bit kernel only:
26 # Options that are inherently 64-bit kernel only:
56 # ported to 32-bit as well. )
158 # Word-size accesses may read uninitialized data past the trailing \0
342 default "elf32-i386" if X86_32
343 default "elf64-x86-64" if X86_64
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/linux/arch/x86/coco/tdx/
H A Dtdx.c1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2021-2022 Intel Corporation */
14 #include <asm/ia32.h>
16 #include <asm/insn-eval.h>
31 #define VE_IS_IO_IN(e) ((e) & BIT(3))
37 #define TDCALL_RETURN_CODE(a) ((a) >> 32) argument
80 /* Read TD-scoped metadata */
94 /* Write TD-scoped metadata */
107 * tdx_mcall_get_report0() - Wrapper to get TDREPORT0 (a.k.a. TDREPORT
109 * @reportdata: Address of the input buffer which contains user-defined
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/linux/arch/x86/events/
H A Dcore.c5 * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar
8 * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra
12 * For licencing details see kernel-base/COPYING
63 * This here uses DEFINE_STATIC_CALL_NULL() to get a static_call defined
64 * from just a typename, as opposed to an actual function.
126 struct hw_perf_event *hwc = &event->hw; in x86_perf_event_update()
127 int shift = 64 - x86_pmu.cntval_bits; in x86_perf_event_update()
131 if (unlikely(!hwc->event_base)) in x86_perf_event_update()
138 * exchange a new raw count - then add that new-prev delta in x86_perf_event_update()
141 prev_raw_count = local64_read(&hwc->prev_count); in x86_perf_event_update()
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