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2b1444f2e2
Add support for s390 auxiliary trace support.
Use 'perf record -e rbd000' to create the perf.data file. The event
also has the symbolic name SF_CYCLES_BASIC_DIAG, using 'perf record -e
SF_CYCLES_BASIC_DIAG' is equivalent.
Use 'perf report -D' to display the auxiliary trace data.
Output before:
0 0 0x25a66 [0x30]: PERF_RECORD_AUXTRACE size: 0x40000
offset: 0 ref: 0 idx: 4 tid: -1 cpu: 4
Nothing else
Output after:
0 0 0x25a66 [0x30]: PERF_RECORD_AUXTRACE size: 0x40000
offset: 0 ref: 0 idx: 4 tid: -1 cpu: 4
.
. ... s390 AUX data: size 262144 bytes
[00000000] Basic Def:0001 Inst:0000 TW AS:3 ASN:0xffff IA:0x0000000000c2f1bc
CL:1 HPP:0x8000000000000000 GPP:000000000000000000
[0x000020] Diag Def:8005
[0x0000bf] Basic Def:0001 Inst:0000 TW AS:3 ASN:0xffff IA:0x0000000000c2f1bc
CL:1 HPP:0x8000000000000000 GPP:000000000000000000
[0x0000df] Diag Def:8005
[0x00017e] Basic Def:0001 Inst:0000 TW AS:3 ASN:0xffff IA:0x0000000000c2f1bc
CL:1 HPP:0x8000000000000000 GPP:000000000000000000
....
[0x000fc0] Trailer F T bsdes:32 dsdes:159 Overflow:0 Time:0xd4ab59a8450fa108
C:1 TOD:0xd4ab4ec98ceb3832 1:0x8000000000000000 2:0xd4ab4ec98ceb3832
This output is shown for every sampled data block. The
output contains the
- basic-sampling data entry
- diagnostic-sampling data entry
- trailer entry
The basic sampling entry and diagnostic sampling entry sizes can be
extracted using the trailer entries in the SDB. On older hardware these
values (bsdes and dsdes in the trailer entry) are reserved and zero.
Older hardware use hard coded values based on the s390 machine type.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Link: http://lkml.kernel.org/r/20180802074622.13641-3-tmricht@linux.ibm.com
Link: http://lkml.kernel.org/r/eda2632e-7919-5ffd-5f68-821e77d216fa@linux.ibm.com
[ Merged a fix for a 'tipe puned' problem reported by Michael Ellerman see last Link tag. ]
[ Removed __packed from two structs, they're already naturally packed and having that. ]
[ attribute breaks the build in gcc 8.1.1 mips, 4.4.7 x86_64, 7.1.1 ARCompact ISA, etc) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Auxtrace support for s390 CPU measurement sampling facility
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*
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* Copyright IBM Corp. 2018
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* Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
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* Thomas Richter <tmricht@linux.ibm.com>
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*/
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#ifndef S390_CPUMSF_KERNEL_H
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#define S390_CPUMSF_KERNEL_H
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#define S390_CPUMSF_PAGESZ 4096 /* Size of sample block units */
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#define S390_CPUMSF_DIAG_DEF_FIRST 0x8001 /* Diagnostic entry lowest id */
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struct hws_basic_entry {
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unsigned int def:16; /* 0-15 Data Entry Format */
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unsigned int R:4; /* 16-19 reserved */
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unsigned int U:4; /* 20-23 Number of unique instruct. */
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unsigned int z:2; /* zeros */
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unsigned int T:1; /* 26 PSW DAT mode */
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unsigned int W:1; /* 27 PSW wait state */
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unsigned int P:1; /* 28 PSW Problem state */
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unsigned int AS:2; /* 29-30 PSW address-space control */
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unsigned int I:1; /* 31 entry valid or invalid */
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unsigned int CL:2; /* 32-33 Configuration Level */
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unsigned int:14;
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unsigned int prim_asn:16; /* primary ASN */
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unsigned long long ia; /* Instruction Address */
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unsigned long long gpp; /* Guest Program Parameter */
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unsigned long long hpp; /* Host Program Parameter */
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};
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struct hws_diag_entry {
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unsigned int def:16; /* 0-15 Data Entry Format */
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unsigned int R:15; /* 16-19 and 20-30 reserved */
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unsigned int I:1; /* 31 entry valid or invalid */
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u8 data[]; /* Machine-dependent sample data */
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};
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struct hws_combined_entry {
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struct hws_basic_entry basic; /* Basic-sampling data entry */
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struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
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};
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struct hws_trailer_entry {
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union {
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struct {
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unsigned int f:1; /* 0 - Block Full Indicator */
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unsigned int a:1; /* 1 - Alert request control */
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unsigned int t:1; /* 2 - Timestamp format */
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unsigned int:29; /* 3 - 31: Reserved */
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unsigned int bsdes:16; /* 32-47: size of basic SDE */
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unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */
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};
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unsigned long long flags; /* 0 - 64: All indicators */
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};
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unsigned long long overflow; /* 64 - sample Overflow count */
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unsigned char timestamp[16]; /* 16 - 31 timestamp */
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unsigned long long reserved1; /* 32 -Reserved */
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unsigned long long reserved2; /* */
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union { /* 48 - reserved for programming use */
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struct {
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unsigned long long clock_base:1; /* in progusage2 */
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unsigned long long progusage1:63;
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unsigned long long progusage2;
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};
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unsigned long long progusage[2];
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};
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};
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#endif
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