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/Linux-v5.15/Documentation/devicetree/bindings/arm/
Dete.yaml1 # SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
4 ---
6 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
8 title: ARM Embedded Trace Extensions
11 - Suzuki K Poulose <suzuki.poulose@arm.com>
12 - Mathieu Poirier <mathieu.poirier@linaro.org>
15 Arm Embedded Trace Extension(ETE) is a per CPU trace component that
18 The trace generated by the ETE could be stored via legacy CoreSight
19 components (e.g, TMC-ETR) or other means (e.g, using a per CPU buffer
20 Arm Trace Buffer Extension (TRBE)). Since the ETE can be connected to
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Dtrbe.yaml1 # SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
4 ---
6 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
8 title: ARM Trace Buffer Extensions
11 - Anshuman Khandual <anshuman.khandual@arm.com>
14 Arm Trace Buffer Extension (TRBE) is a per CPU component
15 for storing trace generated on the CPU to memory. It is
25 - const: arm,trace-buffer-extension
31 the arm,gic-v3 binding for details on describing a PPI partition.
35 - compatible
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Dspe-pmu.txt1 * ARMv8.2 Statistical Profiling Extension (SPE) Performance Monitor Units (PMU)
3 ARMv8.2 introduces the optional Statistical Profiling Extension for collecting
4 performance sample data using an in-memory trace buffer.
8 - compatible : should be one of:
9 "arm,statistical-profiling-extension-v1"
11 - interrupts : Exactly 1 PPI must be listed. For heterogeneous systems where
13 the arm,gic-v3 binding for details on describing a PPI partition.
17 spe-pmu {
18 compatible = "arm,statistical-profiling-extension-v1";
/Linux-v5.15/Documentation/trace/coresight/
Dcoresight-trbe.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Trace Buffer Extension (TRBE).
11 --------------------
13 Trace Buffer Extension (TRBE) is a percpu hardware which captures in system
15 gets plugged in as a coresight sink device because the corresponding trace
23 ---------------------------
36 *Key file items are:-*
/Linux-v5.15/drivers/hwtracing/coresight/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
14 and trace drivers to register themselves with. It's intended to build
17 trace source gets enabled.
27 responsible for transporting and collecting the trace data
28 respectively. Link and sinks are dynamically aggregated with a trace
29 entity at run time to form a complete trace path.
32 modules will be called coresight-funnel and coresight-replicator.
39 This enables support for the Trace Memory Controller driver.
41 trace router - ETR) or sink (embedded trace FIFO). The driver
46 module will be called coresight-tmc.
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Dcoresight-trbe.c1 // SPDX-License-Identifier: GPL-2.0
3 * This driver enables Trace Buffer Extension (TRBE) as a per-cpu coresight
4 * sink device could then pair with an appropriate per-cpu coresight source
5 * device (ETE) thus generating required trace data. Trace can be enabled
8 * The AUX buffer handling is inspired from Arm SPE PMU driver.
19 #include "coresight-trbe.h"
21 #define PERF_IDX2OFF(idx, buf) ((idx) % ((buf)->nr_pages << PAGE_SHIFT))
25 * in skipping relevant sections in the captured trace
27 * formatting the trace data, unlike the legacy CoreSight
28 * sinks and thus we use ETE trace packets to pad the
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Dcoresight-trbe.h1 /* SPDX-License-Identifier: GPL-2.0 */
4 * Trace Buffer Extension (TRBE) driver in the coresight framework.
18 #include "coresight-etm-perf.h"
/Linux-v5.15/Documentation/vm/
Dpage_owner.rst19 to enlarge the trace buffer for preventing overlapping until userspace
20 program launched. And, launched program continually dump out the trace
21 buffer for later analysis and it would change system behaviour with more
41 - Without page owner::
46 - With page owner::
59 stores information into the memory from struct page extension. This memory
66 more accurately. On 2GB memory x86-64 VM box, 13343 early allocated pages
68 page extension feature. Anyway, after that, no page is left in
69 un-tracking state.
74 1) Build user-space helper::
/Linux-v5.15/Documentation/userspace-api/media/drivers/
Duvcvideo.rst1 .. SPDX-License-Identifier: GPL-2.0
6 This file documents some driver-specific aspects of the UVC driver, such as
7 driver-specific ioctls and implementation notes.
10 linux-uvc-devel@lists.berlios.de.
13 Extension Unit (XU) support
14 ---------------------------
19 The UVC specification allows for vendor-specific extensions through extension
20 units (XUs). The Linux UVC driver supports extension unit controls (XU controls)
23 - through mappings of XU controls to V4L2 controls
24 - through a driver-specific ioctl interface
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/Linux-v5.15/drivers/media/usb/uvc/
Duvc_driver.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * uvc_driver.c -- USB Video Class driver
5 * Copyright (C) 2005-2010
22 #include <media/v4l2-common.h>
23 #include <media/v4l2-ioctl.h>
34 static unsigned int uvc_quirks_param = -1;
38 /* ------------------------------------------------------------------------
84 .name = "Greyscale 8-bit (Y800)",
89 .name = "Greyscale 8-bit (Y8 )",
94 .name = "Greyscale 8-bit (D3DFMT_L8)",
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/Linux-v5.15/arch/arm/mm/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
17 A 32-bit RISC microprocessor based on the ARM7 processor core
36 A 32-bit RISC processor with 8kByte Cache, Write Buffer and
53 A 32-bit RISC processor with 8KB cache or 4KB variants,
54 write buffer and MPU(Protection Unit) built around
69 A 32-bit RISC microprocessor based on the ARM9 processor core
166 Branch Target Buffer, Unified TLB and cache line size 16.
182 ARM940T is a member of the ARM9TDMI family of general-
184 instruction and 4KB data cases, each with a 4-word line
190 # ARM946E-S
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/Linux-v5.15/tools/perf/Documentation/
Dperf-intel-pt.txt1 perf-intel-pt(1)
5 ----
6 perf-intel-pt - Support for Intel Processor Trace within perf tools
9 --------
11 'perf record' -e intel_pt//
14 -----------
16 Intel Processor Trace (Intel PT) is an extension of Intel Architecture that
19 Technical details are documented in the Intel 64 and IA-32 Architectures
20 Software Developer Manuals, Chapter 36 Intel Processor Trace.
23 processors that are based on the Intel micro-architecture code name Broadwell.
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/Linux-v5.15/drivers/perf/
Darm_spe_pmu.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Perf support for the Statistical Profiling Extension, introduced as
77 /* Convert a free-running index from perf into an SPE buffer offset */
78 #define PERF_IDX2OFF(idx, buf) ((idx) % ((buf)->nr_pages << PAGE_SHIFT))
106 return !!(spe_pmu->features & arm_spe_pmu_feat_caps[cap]); in arm_spe_pmu_cap_get()
110 return spe_pmu->counter_sz; in arm_spe_pmu_cap_get()
112 return spe_pmu->min_period; in arm_spe_pmu_cap_get()
127 int cap = (long)ea->var; in arm_spe_pmu_cap_show()
186 (lo) == (hi) ? #cfg ":" #lo "\n" : #cfg ":" #lo "-" #hi
198 ((((attr)->cfg) >> lo) & GENMASK(hi - lo, 0))
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/Linux-v5.15/include/net/9p/
D9p.h1 /* SPDX-License-Identifier: GPL-2.0-only */
16 * enum p9_debug_flags - bits for mount time debug parameter
21 * @P9_DEBUG_MUX: trace management of concurrent transactions
27 * @P9_DEBUG_FSC: FS-cache tracing
62 * enum p9_msg_t - 9P message types
112 * See Also: http://plan9.bell-labs.com/sys/man/5/INDEX.html
187 * enum p9_open_mode_t - 9P open modes
192 * @P9_OTRUNC: truncate file to zero-length before opening it
205 * See Also: http://plan9.bell-labs.com/magic/man2html/2/open
221 * enum p9_perm_t - 9P permissions
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/Linux-v5.15/include/uapi/linux/
Dperf_event.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
5 * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
6 * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
7 * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
13 * For licencing details see kernel-base/COPYING
23 * User-space ABI bits:
37 PERF_TYPE_MAX, /* non-ABI */
75 PERF_COUNT_HW_MAX, /* non-ABI */
81 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU, NODE } x
94 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
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/Linux-v5.15/tools/include/uapi/linux/
Dperf_event.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
5 * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
6 * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
7 * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
13 * For licencing details see kernel-base/COPYING
23 * User-space ABI bits:
37 PERF_TYPE_MAX, /* non-ABI */
75 PERF_COUNT_HW_MAX, /* non-ABI */
81 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU, NODE } x
94 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
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/Linux-v5.15/drivers/net/wireless/broadcom/brcm80211/brcmfmac/
Dfirmware.c1 // SPDX-License-Identifier: ISC
34 * struct nvram_parser - internal info for parser.
37 * @data: input buffer being parsed.
38 * @nvram: output buffer with parse result.
42 * @pos: byte offset in input buffer.
63 * is_nvram_char() - check if char is a valid one for NVRAM entry
87 c = nvp->data[nvp->pos]; in brcmf_nvram_handle_idle()
95 nvp->entry = nvp->pos; in brcmf_nvram_handle_idle()
99 nvp->line, nvp->column); in brcmf_nvram_handle_idle()
101 nvp->column++; in brcmf_nvram_handle_idle()
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Dbcdc.c1 // SPDX-License-Identifier: ISC
44 * BCDC header - Broadcom specific extension of CDC.
58 ((int)((((hdr)->flags2) & BCDC_FLAG2_IF_MASK) >> BCDC_FLAG2_IF_SHIFT))
60 ((hdr)->flags2 = (((hdr)->flags2 & ~BCDC_FLAG2_IF_MASK) | \
64 * struct brcmf_proto_bcdc_header - BCDC header format
101 struct brcmf_bcdc *bcdc = drvr->proto->pd; in drvr_to_fws()
103 return bcdc->fws; in drvr_to_fws()
110 struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; in brcmf_proto_bcdc_msg()
111 struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; in brcmf_proto_bcdc_msg()
118 msg->cmd = cpu_to_le32(cmd); in brcmf_proto_bcdc_msg()
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Dsdio.c1 // SPDX-License-Identifier: ISC
68 /* Device console log buffer state */
72 __le32 buf; /* Can't be pointer on (64-bit) hosts */
91 /* Output (logging) buffer
92 * Console output is written to a ring buffer log_buf at index log_idx.
99 /* Console input line buffer
102 * the buffer is processed as a command line.
117 #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
118 #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
148 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
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/Linux-v5.15/drivers/staging/media/atomisp/pci/
Dsh_css_internal.h1 /* SPDX-License-Identifier: GPL-2.0 */
40 #include "ia_css_circbuf_comm.h" /* Circular buffer */
136 #define CALC_ALIGNMENT_MEMBER(x, y) (CEIL_MUL(x, y) - x)
207 /* Note that the struct below should only consist of ia_css_ptr-es
316 trace[SH_CSS_SP_DBG_TRACE_DEPTH]; member
321 /* Example of just one global trace */
335 trace[SH_CSS_SP_DBG_NR_OF_TRACES][SH_CSS_SP_DBG_TRACE_DEPTH]; member
353 * The DMA software-mask,
356 * Bit 15...08: reading-request enabling bits for DMA channel 7..0
357 * Bit 07...00: writing-request enabling bits for DMA channel 7..0
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/Linux-v5.15/Documentation/filesystems/
Drelay.rst1 .. SPDX-License-Identifier: GPL-2.0
9 to userspace via user-defined 'relay channels'.
11 A 'relay channel' is a kernel->user data relay mechanism implemented
12 as a set of per-cpu kernel buffers ('channel buffers'), each
16 buffer. User space applications mmap() or read() from the relay files
24 buffer data. The relay interface doesn't implement any form of data
25 filtering - this also is left to the kernel client. The purpose is to
30 functions in the relay interface code - please see that for details.
35 Each relay channel has one buffer per CPU, each buffer has one or more
36 sub-buffers. Messages are written to the first sub-buffer until it is
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/Linux-v5.15/drivers/staging/media/atomisp/pci/runtime/debug/src/
Dia_css_debug.c1 // SPDX-License-Identifier: GPL-2.0
190 fw->info.sp.threads_stack, in debug_dump_sp_stack_info()
191 fw->info.sp.threads_stack_size); in debug_dump_sp_stack_info()
193 HIVE_ADDR_sp_threads_stack = fw->info.sp.threads_stack; in debug_dump_sp_stack_info()
194 HIVE_ADDR_sp_threads_stack_size = fw->info.sp.threads_stack_size; in debug_dump_sp_stack_info()
196 if (fw->info.sp.threads_stack == 0 || in debug_dump_sp_stack_info()
197 fw->info.sp.threads_stack_size == 0) in debug_dump_sp_stack_info()
240 return "yuv420-8-legacy"; in debug_stream_format2str()
242 return "yuv420-8"; in debug_stream_format2str()
244 return "yuv420-10"; in debug_stream_format2str()
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/Linux-v5.15/net/ipv6/
Dexthdrs.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Extension Header handling for IPv6
16 * YOSHIFUJI Hideaki @USAGI Register inbound extension header
89 if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr)) in ip6_tlvopt_unknown()
110 /* Parse tlv encoded option header (hop-by-hop or destination) */
125 max_count = -max_count; in ip6_parse_tlv()
132 len -= 2; in ip6_parse_tlv()
142 len--; in ip6_parse_tlv()
215 len -= optlen; in ip6_parse_tlv()
237 if (opt->dsthao) { in ipv6_dest_hao()
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/Linux-v5.15/net/rds/
Drds.h1 /* SPDX-License-Identifier: GPL-2.0 */
56 /* Used to limit both RDMA and non-RDMA RDS message to 1MB */
96 #define RDS_MPATH_HASH(rs, n) (jhash_1word((rs)->rs_bound_port, \
97 (rs)->rs_hash_initval) & ((n) - 1))
176 return read_pnet(&conn->c_net); in rds_conn_net()
182 write_pnet(&conn->c_net, net); in rds_conn_net_set()
202 * Maximum space available for extension headers.
221 * Reserved - indicates end of extensions
226 * This extension header is included in the very
241 * This extension header is included in the RDS message
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/Linux-v5.15/tools/perf/
Dbuiltin-script.c1 // SPDX-License-Identifier: GPL-2.0
7 #include <subcmd/exec-cmd.h>
9 #include <subcmd/parse-options.h>
17 #include "util/trace-event.h"
30 #include "util/thread-stack.h"
31 #include "util/time-utils.h"
44 #include "util/mem-events.h"
45 #include "util/dump-insn.h"
162 {.str = "trace", .field = PERF_OUTPUT_TRACE},
176 {.str = "bpf-output", .field = PERF_OUTPUT_BPF_OUTPUT},
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