| /linux/arch/x86/kernel/ |
| H A D | smp.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * (c) 1998-99, 2000, 2009 Ingo Molnar <mingo@redhat.com>
9 * i386 and x86_64 integration by Glauber Costa <gcosta@redhat.com>
42 * Pentium, Pentium Pro, II, III (and all CPUs) have bugs.
46 * None of the E1AP-E3AP errata are visible to the user.
53 * None of the A1AP-A3AP errata are visible to the user.
60 * None of 1AP-9AP errata are visible to the normal user,
62 * This is very rare and a non-problem.
64 * 1AP. Linux maps APIC as non-cacheable
65 * 2AP. worked around in hardware
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| /linux/include/linux/ |
| H A D | overflow.h | 1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
10 * We need to compute the minimum and maximum values representable in a given
14 * #define type_min(T) (T)(is_signed_type(T) ? (T)1 << (8*sizeof(T)-1) : 0)
15 * #define type_max(T) (T)(is_signed_type(T) ? ((T)1 << (8*sizeof(T)-1)) - 1 : ~(T)0)
18 * undefined behaviour, and at least some versions of gcc warn about
19 * the type_max expression (but not if -fsanitiz
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| H A D | compiler-gcc.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 #error "Please do not include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
15 * shouldn't recognize the original var, and make assumptions about it.
18 * pointer arithmetic on "objects" outside their boundaries and the
19 * gcc optimizers assume this is the case. In particular they
23 * To work around it we hide the relationship of the pointer and the object
27 * RELOC_HIDE could trash r30. The bug can be worked around by changing
28 * the inline assembly constraint from =g to =r, in this particular
43 * calling noreturn functions, __builtin_unreachable() and __builtin_trap()
44 * confuse the stack allocation in gcc, leading to overly large stack
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| H A D | timecounter.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
14 #define CYCLECOUNTER_MASK(bits) (u64)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)
17 * struct cyclecounter - hardware abstraction for a free running counter
18 * Provides completely state-free accessors to the underlying hardware.
20 * around quickly. Locking rules (if necessary) have to be defined
21 * by the implementor and user of specific instances of this API.
25 * subtraction of non-64-bit counters,
38 * struct timecounter - layer above a &struct cyclecounter which counts nanoseconds
40 * cycle counter wrap around. Initialize with
44 * cycle counter hardware, locking issues and reading the time
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| H A D | ecryptfs.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
11 * bits from a sysfs handle in order to determine how to behave. */
27 * in-memory representations are expanded hex, so it better adapted to
28 * be passed around or referenced on the command line */
49 * For convenience, we may need to pass around the encrypted session
50 * key between kernel and userspace because the authentication token
52 * private key, instead requiring the encrypted data and returning the
75 /* Iterated-hash concatenation of salt and passphrase */
78 /* Always in expanded hex */
94 u16 version; /* 8-bit major and 8-bit minor */
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| /linux/arch/arm64/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
287 ARM 64-bit (AArch64) Linux support.
295 # required due to use of the -Zfixed-x18 flag.
298 # -Zsanitizer=shadow-call-stack flag.
308 depends on $(cc-option,-fpatchable-function-entry=2)
334 # VA_BITS - PTDESC_TABLE_SHIFT
412 def_bool !$(as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n)
417 # https://github.com/llvm/llvm-project/commit/2a96f47c5ffca84cd774ad402cacd137f4bf45e2
420 # and this was backported to 10.2.0, 9.4.0, 8.5.0, but not earlier
453 …bool "AmpereOne: AC03_CPU_38: Certain bits in the Virtualization Translation Control Register and …
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| /linux/Documentation/process/ |
| H A D | 6.Followthrough.rst | 6 At this point, you have followed the guidelines given so far and, with the
9 developers can make is to conclude that their work is now done. In truth,
15 and, as a result, is heavily oriented toward the improvement of posted
18 standards. A failure to participate in this process is quite likely to
23 ----------------------
25 A patch of any significance will result in a number of comments from other
28 process. Life can be made much easier, though, if you keep a few things in
31 - If you have explained your patch well, reviewers will understand its
32 value and why you went to the trouble of writing it. But that value
34 like to maintain a kernel with this code in it five or ten years later?
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| /linux/arch/powerpc/platforms/8xx/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
19 The MPC86xADS is meant to serve as a platform for s/w and h/w
20 development around the MPC86X processor families.
29 The MPC885ADS is meant to serve as a platform for s/w and h/w
30 development around the MPC885 processor family.
33 bool "Embedded Planet EP88xC (a.k.a. CWH-PPC-885XN-VE)"
39 MPC885 Evaluation System and/or the CWH-PPC-885XN-VE.
56 menu "Freescale Ethernet driver platform-specific options"
64 This enables support for second Ethernet on MPC885ADS and MPC86xADS boards.
76 Enable FEC2 to serve as 2-nd Ethernet channel. Note that SMC2
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| /linux/Documentation/driver-api/usb/ |
| H A D | error-codes.rst | 1 .. _usb-error-codes:
6 :Revised: 2004-Oct-21
8 This is the documentation of (hopefully) all possible error codes (and
13 behave the same except for transfer speed dependent behaviors and the
20 Non-USB-specific:
26 ``-ENOMEM`` no memory for allocation of internal structures
29 USB-specific:
32 ``-EBUSY`` The URB is already active.
34 ``-ENODEV`` specified USB-device or bus doesn't exist
36 ``-ENOENT`` specified interface or endpoint does not exist or
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| /linux/Documentation/timers/ |
| H A D | timekeeping.rst | 2 Clock sources, Clock events, sched_clock() and delay timers
6 abstractions. It partly pertains to the drivers usually found in
7 drivers/clocksource in the kernel tree, but the code may be spread out
10 If you grep through the kernel source you will find a number of architecture-
11 specific implementations of clock sources, clockevents and several likewise
12 architecture-specific overrides of the sched_clock() function and some
17 on this timeline, providing facilities such as high-resolution timers.
18 sched_clock() is used for scheduling and timestamping, and delay timers
23 -------------
26 tells you where you are in time. For example issuing the command 'date' on
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| /linux/tools/perf/util/ |
| H A D | mutex.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
9 * A function-like feature checking macro that is a wrapper around
10 * `__has_attribute`, which is defined by GCC 5+ and Clang and evaluates to a
42 /* Documents functions that acquire a lock in the body of a function, and do not release it. */
46 * Documents functions that acquire a shared (reader) lock in the body of a
47 * function, and do not release it.
53 * and release it in the body of the function.
57 /* Documents functions that try to acquire a lock, and return success or failure. */
88 * A wrapper around the mutex implementation that allows perf to error check
95 /* A wrapper around the condition variable implementation. */
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| /linux/lib/ |
| H A D | Kconfig.ubsan | 1 # SPDX-License-Identifier: GPL-2.0-only
10 Compile-time instrumentation is used to detect various undefined
12 Documentation/dev-tools/ubsan.rst
21 the kernel size by around 5%, due to adding all the debugging
28 trade-off.
32 when a UBSAN violation occurs. (Except on arm64 and x86, which
39 def_bool $(cc-option,-fsanitize=bounds-strict)
41 The -fsanitize=bounds-strict option is only available on GCC,
44 -fsanitize=bounds.
47 def_bool $(cc-option,-fsanitize=array-bounds)
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| /linux/include/drm/display/ |
| H A D | drm_scdc_helper.h | 5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
8 * and/or sell copies of the Software, and to permit persons to whom the
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
40 * drm_scdc_readb - read a single byte from SCDC
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| /linux/arch/xtensa/ |
| H A D | Kconfig.debug | 1 # SPDX-License-Identifier: GPL-2.0
17 Enable this function to disable link-time optimizations.
19 values to reduce code size and remove unnecessary overhead from
20 assembler-generated 'longcall' sequences.
22 code size, and possibly execution time.
25 bool "Perform S32C1I instruction self-test at boot"
40 prints in stack traces.
43 bool "Dump user code around unhandled exception address"
45 Enable this option to display user code around PC of the unhandled
47 This may simplify finding faulting code in the absence of other
|
| /linux/Documentation/devicetree/bindings/iio/ |
| H A D | mount-matrix.txt | 2 * is the definition of +/- values practical or counterintuitive?
3 * are the definitions unambiguous and easy to follow?
13 that produce three-dimensional data in relation to the world where it is
18 defined in linear algebra.
22 and thus implying that the component should be mounted in a certain orientation
29 screen and (z) being depth, the axis perpendicular to the screen.
33 and (z) depth to be negative under the screen and positive in front of it,
36 A sensor can be mounted in any angle along the axes relative to the frame of
37 reference. This means that the sensor may be flipped upside-down, left-right,
43 to this world. When using the mounting matrix, the sensor and device orientation
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| /linux/Documentation/devicetree/bindings/phy/ |
| H A D | mediatek,mt7988-xfi-tphy.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/phy/mediatek,mt7988-xfi-tphy.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: MediaTek MT7988 XFI T-PHY
10 - Daniel Golle <daniel@makrotopia.org>
13 The MediaTek XFI SerDes T-PHY provides the physical SerDes lanes
14 used by the (10G/5G) USXGMII PCS and (1G/2.5G) LynxI PCS found in
15 MediaTek's 10G-capabale MT7988 SoC.
16 In MediaTek's SDK sources, this unit is referred to as "pextp".
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| /linux/Documentation/devicetree/bindings/net/ |
| H A D | mdio.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andrew Lunn <andrew@lunn.ch>
11 - Florian Fainelli <f.fainelli@gmail.com>
12 - Heiner Kallweit <hkallweit1@gmail.com>
17 bus. These should follow the generic ethernet-phy.yaml document, or
22 pattern: '^mdio(-(bus|external))?(@.+|-([0-9]+))?$'
24 "#address-cells":
27 "#size-cells":
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| /linux/Documentation/scsi/ |
| H A D | ChangeLog.sym53c8xx | 1 Sat May 12 12:00 2001 Gerard Roudier (groudier@club-internet.fr)
2 * version sym53c8xx-1.7.3c
3 - Ensure LEDC bit in GPCNTL is cleared when reading the NVRAM.
4 Fix sent by Stig Telfer <stig@api-networks.com>.
5 - Backport from SYM-2 the work-around that allows to support
7 - Check that we received at least 8 bytes of INQUIRY response
9 - Define scsi_set_pci_device() as nil for kernel < 2.4.4.
10 - + A couple of minor changes.
12 Sat Apr 7 19:30 2001 Gerard Roudier (groudier@club-internet.fr)
13 * version sym53c8xx-1.7.3b
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| H A D | scsi-changer.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 with "Type: Medium Changer" in /proc/scsi/scsi.
11 common small CD-ROM changers, neither one-lun-per-slot SCSI changers
19 -------------------
23 and one for the device which actually reads and writes the data. The
24 later may be anything, a MOD, a CD-ROM, a tape or whatever. For the
25 changer device this is a "don't care", he *only* shuffles around the
29 The SCSI changer model is complex, compared to - for example - IDE-CD
34 media transport this one shuffles around the media, i.e. the
39 fill in and remove media from the changer.
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| /linux/Documentation/admin-guide/media/ |
| H A D | avermedia.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 Avermedia DVB-T on BT878 Release Notes
12 broader and updated content about that, please check:
16 The Avermedia DVB-T
19 The Avermedia DVB-T is a budget PCI DVB card. It has 3 inputs:
23 * SVIDEO Input (Mini-DIN)
27 Frontend of the Avermedia DVB-T is a Microtune 7202D. A timely
28 post to the linux-dvb mailing list ascertained that the
30 found in the dvb-hw CVS module.
32 The DVB-T card is based around the BT878 chip which is a very
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| H A D | vivid.rst | 1 .. SPDX-License-Identifier: GPL-2.0
7 output, vbi capture and output, metadata capture and output, radio receivers and
8 transmitters, touch capture and a software defined radio receiver. In addition a
9 simple framebuffer device is available for testing capture and output overlays.
11 Up to 64 vivid instances can be created, each with up to 16 inputs and 16 outputs.
13 Each input can be a webcam, TV capture device, S-Video capture device or an HDMI
14 capture device. Each output can be an S-Video output device or an HDMI output
17 These inputs and outputs act exactly as a real hardware device would behave. This
23 - Support for read()/write(), MMAP, USERPTR and DMABUF streaming I/O.
24 - A large list of test patterns and variations thereof
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| /linux/include/uapi/linux/ |
| H A D | taskstats.h | 1 /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
2 /* taskstats.h - exporting per-task statistics
8 * This program is free software; you can redistribute it and/or modify it
12 * This program is distributed in the hope that it would be useful, but
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
39 * in linux/sched.h */
44 * TAKSTATS_VERSION, which is defined in <linux/taskstats.h>.
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| /linux/arch/sh/drivers/pci/ |
| H A D | ops-dreamcast.c | 1 // SPDX-License-Identifier: GPL-2.0
22 * someone implicitly messes around with the last devfn value.. otherwise we
23 * only support a single device anyways, and if we didn't have a BBA, we
26 * Also, we could very easily support both Type 0 and Type 1 configurations
27 * here, but since it doesn't seem that there is any such implementation in
30 * I suppose if someone actually gets around to ripping the chip out of
31 * the BBA and hanging some more devices off of it, then this might be
33 * and the general lack of activity by DC hardware hackers, this doesn't seem
42 * We can also actually read and write in b/w/l sizes! Thankfully this part
43 * was at least done right, and we don't have to do the stupid masking and
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| /linux/arch/arm/crypto/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
14 GCM GHASH function (NIST SP800-38D)
17 - PMULL (Polynomial Multiply Long) instructions
18 - NEON (Advanced SIMD) extensions
19 - ARMv8 Crypto Extensions
34 - NEON (Advanced SIMD) extensions
44 - NEON (Advanced SIMD) extensions
49 much faster than the SHA-2 family and slightly faster than
50 SHA-1.
57 Block ciphers: AES cipher algorithms (FIPS-197)
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| /linux/tools/testing/selftests/rseq/ |
| H A D | compiler.h | 1 /* SPDX-License-Identifier: LGPL-2.1-only OR MIT */
5 * Work-around asm goto compiler bugs.
7 * (C) Copyright 2021 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
21 * https://github.com/llvm/llvm-project/issues/52735
23 * Work around these issues by adding a volatile inline asm with
24 * memory clobber in the fallthrough after the asm goto and at each
25 * label target. Emit this for all compilers in case other similar
26 * issues are found in the future.
|