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/linux/Documentation/ABI/testing/
H A Dsysfs-devices-system-cpu2 Date: pre-git history
3 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
18 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
37 See Documentation/admin-guide/cputopology.rst for more information.
43 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
58 Contact: Linux memory management mailing list <linux-mm@kvack.org>
67 /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2
77 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
89 core_siblings_list: human-readable list of the logical CPU
99 thread_siblings_list: human-readable list of cpuX's hardware
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/linux/arch/arm/mach-spear/
H A Dspear1310.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * arch/arm/mach-spear13xx/spear1310.c
26 platform_device_register_simple("spear-cpufreq", -1, NULL, 0); in spear1310_dt_init()
31 "st,spear1310-evb",
36 * Following will create 16MB static virtual/physical mappings
37 * PHYSICAL VIRTUAL
42 .virtual = VA_SPEAR1310_RAS_GRP1_BASE,
/linux/arch/arm/mach-tegra/
H A Dtegra.c1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/dma-mapping.h>
34 #include <asm/hardware/cache-l2x0.h>
37 #include <asm/mach-types.h>
49 * Storage for debug-macro.S's state.
52 * kernel is loaded. The data is declared here rather than debug-macro.S so
53 * that multiple inclusions of debug-macro.S point at the same data.
60 /* Debug UART virtual address */
92 platform_device_register_simple("tegra20-cpufreq", -1, NULL, 0); in tegra_dt_init_late()
95 platform_device_register_simple("tegra-cpuidle", -1, NULL, 0); in tegra_dt_init_late()
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H A Dsleep-tegra30.S1 /* SPDX-License-Identifier: GPL-2.0-only */
11 #include <asm/asm-offsets.h>
81 .arch armv7-a
192 * Puts the current CPU in wait-for-event mode on the flow controller
193 * and powergates it -- flags (in R0) indicate the request type.
196 * corrupts r0-r4, r10-r12
210 add r1, r1, r12 @ virtual CSR address for this CPU
212 add r2, r2, r12 @ virtual HALT_EVENTS address for this CPU
293 * CPU power-gating process, to avoid loading from SDRAM which
294 * are not supported once SDRAM is put into self-refresh.
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/linux/arch/arm/mach-s5pv210/
H A Ds5pv210.c1 // SPDX-License-Identifier: GPL-2.0
5 // Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
17 #include "regs-clock.h"
26 if (!of_flat_dt_is_compatible(node, "samsung,s5pv210-clock")) in s5pv210_fdt_map_sys()
34 iodesc.length = be32_to_cpu(reg[1]) - 1; in s5pv210_fdt_map_sys()
35 iodesc.virtual = (unsigned long)S3C_VA_SYS; in s5pv210_fdt_map_sys()
56 platform_device_register_simple("s5pv210-cpufreq", -1, NULL, 0); in s5pv210_dt_init_late()
66 DT_MACHINE_START(S5PV210_DT, "Samsung S5PC110/S5PV210-based board")
/linux/drivers/clk/
H A Dclk-scpi.c1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/clk-provider.h>
32 return clk->scpi_ops->clk_get_val(clk->id); in scpi_clk_recalc_rate()
52 return clk->scpi_ops->clk_set_val(clk->id, rate); in scpi_clk_set_rate()
66 const struct scpi_opp *opp = clk->info->opps; in __scpi_dvfs_round_rate()
68 for (idx = 0; idx < clk->info->count; idx++, opp++) { in __scpi_dvfs_round_rate()
69 ftmp = opp->freq; in __scpi_dvfs_round_rate()
85 int idx = clk->scpi_ops->dvfs_get_idx(clk->id); in scpi_dvfs_recalc_rate()
91 opp = clk->info->opps + idx; in scpi_dvfs_recalc_rate()
92 return opp->freq; in scpi_dvfs_recalc_rate()
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/linux/drivers/xen/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
32 2) control domain: xl mem-max <target-domain> <maxmem>
35 3) control domain: xl mem-set <target-domain> <memory>
51 …SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /…
97 to other virtual machines.
130 virtual environment, /sys/hypervisor will still be present,
145 bool "Add support for dma-buf grant access device driver extension"
150 dma-buf implementation. With this extension grant references to
151 the pages of an imported dma-buf can be exported for other domain
153 converted into a local dma-buf for local export.
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H A Dxen-acpi-processor.c1 // SPDX-License-Identifier: GPL-2.0-only
7 * https://lore.kernel.org/lkml/1322673664-14642-6-git-send-email-konrad.wilk@oracle.com
15 #include <linux/cpufreq.h>
35 * - as those shrink to nr_cpu_bits (which is dependent on possible_cpu), which
40 /* Mutex to protect the acpi_ids_done - for CPU hotplug use. */
48 /* Which ACPI P-State dependencies for a enumerated processor */
56 .u.set_pminfo.id = _pr->acpi_id, in push_cxx_to_hypervisor()
64 dst_cx_states = kcalloc(_pr->power.count, in push_cxx_to_hypervisor()
67 return -ENOMEM; in push_cxx_to_hypervisor()
69 for (ok = 0, i = 1; i <= _pr->power.count; i++) { in push_cxx_to_hypervisor()
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/linux/arch/arm/mach-omap2/
H A Dclkt2xxx_virt_prcm_set.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * OMAP2xxx DVFS virtual clock functions
5 * Copyright (C) 2005-2008, 2012 Texas Instruments, Inc.
6 * Copyright (C) 2004-2010 Nokia Corporation
9 * Richard Woodruff <r-woodruff2@ti.com>
30 #include <linux/cpufreq.h>
38 #include "cm-regbits-24xx.h"
48 * sys_ck_rate: the rate of the external high-frequency clock
49 * oscillator on the board. Set by the SoC-specific clock init code.
55 * omap2_table_mpu_recalc - just return the MPU speed
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/linux/drivers/macintosh/
H A Dwindfarm_pm121.c1 // SPDX-License-Identifier: GPL-2.0-only
16 * that none of the code has been re-used, it's a complete
17 * re-implementation
21 * controls with a tiny difference. The control-ids of hard-drive-fan
22 * and cpu-fan is swapped.
34 * offset : -19563152
38 * offset : -15650652
44 * offset : -15650652
48 * offset : -19563152
54 * offset : -25431900
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/linux/arch/sparc/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 bool "64-bit kernel" if "$(ARCH)" = "sparc"
10 Say yes to build a 64-bit kernel - formerly known as sparc64
11 Say no to build a 32-bit kernel - formerly known as sparc
155 bool "Symmetric multi-processing support"
161 If you say N here, the kernel will run on uni- and multiprocessor
171 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
226 bool "Support for hot-pluggable CPUs"
234 source "drivers/cpufreq/Kconfig"
238 tristate "UltraSPARC-III Memory Controller driver"
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/linux/arch/arm/mach-sa1100/
H A Dgeneric.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-sa1100/generic.c
15 #include <linux/dma-mapping.h>
17 #include <linux/cpufreq.h>
23 #include <linux/irqchip/irq-sa11x0.h>
75 * Default power-off for SA1100
83 /* enable wake-up on GPIO0 (Assabet...) */ in sa1100_power_off()
102 /* Use on-chip reset capability */ in sa11x0_restart()
110 dev->dev.platform_data = data; in sa11x0_register_device()
114 dev->name, err); in sa11x0_register_device()
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/linux/tools/power/x86/x86_energy_perf_policy/
H A Dx86_energy_perf_policy.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * x86_energy_perf_policy -- set the energy versus performance
7 * Copyright (c) 2010 - 2017 Intel Corporation.
30 #define OPTARG_NORMAL (INT_MAX - 1)
31 #define OPTARG_POWER (INT_MAX - 2)
32 #define OPTARG_BALANCE_POWER (INT_MAX - 3)
33 #define OPTARG_BALANCE_PERFORMANCE (INT_MAX - 4)
34 #define OPTARG_PERFORMANCE (INT_MAX - 5)
103 fprintf(stderr, "scope: --cpu cpu-list [--hwp-use-pkg #] | --pkg pkg-list\n"); in usage()
104 fprintf(stderr, "field: --all | --epb | --hwp-epp | --hwp-min | --hwp-max | --hwp-desired\n"); in usage()
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/linux/arch/arm/mach-versatile/
H A Dspc.c1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/clk-provider.h>
28 #define SPCLOG "vexpress-spc: "
39 /* SPC wake-up IRQs status and mask */
46 /* SPC per-CPU mailboxes */
59 /* A15/A7 OPP virtual register base */
68 /* wake-up interrupt masks */
71 /* TC2 static dual-cluster configuration */
75 * Even though the SPC takes max 3-5 ms to complete any OPP/COMMS
113 return cluster == info->a15_clusid; in cluster_is_a15()
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/linux/arch/arm64/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
280 ARM 64-bit (AArch64) Linux support.
288 # required due to use of the -Zfixed-x18 flag.
291 # -Zsanitizer=shadow-call-stack flag.
301 depends on $(cc-option,-fpatchable-function-entry=2)
327 # VA_BITS - PAGE_SHIFT - 3
405 def_bool !$(as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n)
410 # https://github.com/llvm/llvm-project/commit/2a96f47c5ffca84cd774ad402cacd137f4bf45e2
460 at stage-2.
468 …bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is acce…
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/linux/arch/riscv/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
4 # see Documentation/kbuild/kconfig-language.rst.
66 # LLD >= 14: https://github.com/llvm/llvm-project/issues/50505
222 # -Zsanitizer=shadow-call-stack flag.
232 depends on $(cc-option,-fpatchable-function-entry=8)
235 def_bool $(cc-option,-fsanitize=shadow-call-stack)
236 …# https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a484e843e6eeb51f0cb7b8819e50da6d2444…
237 depends on $(ld-option,--no-relax-gp)
241 # https://github.com/llvm/llvm-project/commit/6611d58f5bbcbec77262d392e2923e1d680f6985
244 # https://github.com/llvm/llvm-project/commit/bbc0f99f3bc96f1db16f649fc21dd18e5b0918f6
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/linux/arch/arm/mach-omap1/
H A Dclock_data.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-omap1/clock_data.c
5 * Copyright (C) 2004 - 2005, 2009-2010 Nokia Corporation
10 * - Clocks that are only available on some chips should be marked with the
18 #include <linux/clk-provider.h>
19 #include <linux/cpufreq.h>
21 #include <linux/soc/ti/omap1-io.h>
23 #include <asm/mach-types.h> /* for machine_is_* */
32 /* Some ARM_IDLECT1 bit shifts - used in struct arm_idlect1_clk */
43 /* Some MOD_CONF_CTRL_0 bit shifts - used in struct clk.enable_bit */
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/linux/arch/x86/xen/
H A Dsetup.c1 // SPDX-License-Identifier: GPL-2.0
16 #include <linux/cpufreq.h>
35 #include <xen/hvc-console.h>
36 #include "xen-ops.h"
53 * Buffer used to remap identity mapped pages. We only need the virtual space.
57 #define REMAP_SIZE (P2M_PER_PAGE - 3)
73 arg = strstr(xen_start_info->cmd_line, "xen_512gb_limit"); in xen_parse_512gb()
77 arg = strstr(xen_start_info->cmd_line, "xen_512gb_limit="); in xen_parse_512gb()
100 xen_extra_mem[i].n_pfns -= n_pfns; in xen_del_extra_mem()
106 xen_extra_mem[i].n_pfns -= n_pfns; in xen_del_extra_mem()
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/linux/net/netfilter/ipvs/
H A Dip_vs_est.c1 // SPDX-License-Identifier: GPL-2.0-or-later
30 seconds) for virtual services and real servers. For measure rate in a
36 avgrate = avgrate*(1-W) + rate*W
38 where W = 2^(-2)
44 * Netlink users can see 64-bit values but sockopt users are restricted
45 to 32-bit values for conns, packets, bps, cps and pps.
50 - cpustats counters are updated per-cpu in SoftIRQ context with BH disabled
51 - kthreads read the cpustats to update the estimators (svcs, dests, total)
52 - the states of estimators can be read (get stats) or modified (zero stats)
56 - estimators are added initially to est_temp_list and later kthread 0
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/linux/drivers/scsi/lpfc/
H A Dlpfc_sli4.h4 * Copyright (C) 2017-2024 Broadcom. All Rights Reserved. The term *
6 * Copyright (C) 2009-2016 Emulex. All rights reserved. *
16 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
24 #include <linux/cpufreq.h>
45 /* Multi-queue arrangement for FCP EQ/CQ/WQ tuples */
84 ((fc_hdr)->fh_s_id[0] << 16 | \
85 (fc_hdr)->fh_s_id[1] << 8 | \
86 (fc_hdr)->fh_s_id[2])
89 ((fc_hdr)->fh_d_id[0] << 16 | \
90 (fc_hdr)->fh_d_id[1] << 8 | \
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/linux/Documentation/RCU/
H A DRTFP.txt4 This document describes RCU-related publications, and is followed by
19 with short-lived threads, such as the K42 research operating system.
20 However, Linux has long-lived tasks, so more is needed.
23 serialization, which is an RCU-like mechanism that relies on the presence
27 that these overheads were not so expensive in the mid-80s. Nonetheless,
28 passive serialization appears to be the first deferred-destruction
30 has lapsed, so this approach may be used in non-GPL software, if desired.
34 In 1987, Rashid et al. described lazy TLB-flush [RichardRashid87a].
36 this paper helped inspire the update-side batching used in the later
38 a description of Argus that noted that use of out-of-date values can
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/linux/drivers/pmdomain/qcom/
H A Dcpr.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
27 #include <linux/nvmem-consumer.h>
29 /* Register Offsets for RB-CPR and Bit Definitions */
125 #define FUSE_REVISION_UNKNOWN (-1)
254 return !drv->loop_disabled; in cpr_is_allowed()
259 writel_relaxed(value, drv->base + offset); in cpr_write()
264 return readl_relaxed(drv->base + offset); in cpr_read()
272 val = readl_relaxed(drv->base + offset); in cpr_masked_write()
275 writel_relaxed(val, drv->base + offset); in cpr_masked_write()
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/linux/drivers/video/fbdev/
H A Dsa1100fb.c16 * linux-arm-kernel@lists.arm.linux.org.uk
26 * - With the Neponset plugged into an Assabet, LCD powerdown
29 * - We don't limit the CPU clock rate nor the mode selection
33 * - Linear grayscale palettes and the kernel.
44 * - The following must never be specified in a panel definition:
47 * - The following should be specified:
57 * - Driver appears to be working for Brutus 320x200x8bpp mode. Other
66 * - FrameBuffer memory is now allocated at run-time when the
70 * - Big cleanup for dynamic selection of machine type at run time.
73 * - Support for Bitsy aka Compaq iPAQ H3600 added.
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/linux/drivers/tty/serial/
H A Dsamsung_tty.c1 // SPDX-License-Identifier: GPL-2.0
5 * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
21 * BJD, 04-Nov-2004
26 #include <linux/cpufreq.h>
28 #include <linux/dma-mapping.h>
165 #define portaddr(port, reg) ((port)->membase + (reg))
167 ((unsigned long *)(unsigned long)((port)->membase + (reg)))
171 switch (port->iotype) { in rd_reg()
186 switch (port->iotype) { in wr_reg()
198 /* Byte-order aware bit setting/clearing functions. */
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