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Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar: "Kernel side changes: - Clean up the x86 instruction decoder (Masami Hiramatsu) - Add new uprobes optimization for PUSH instructions on x86 (Yonghong Song) - Add MSR_IA32_THERM_STATUS to the MSR events (Stephane Eranian) - Fix misc bugs, update documentation, plus various cleanups (Jiri Olsa) There's a large number of tooling side improvements: - Intel-PT/BTS improvements (Adrian Hunter) - Numerous 'perf trace' improvements (Arnaldo Carvalho de Melo) - Introduce an errno code to string facility (Hendrik Brueckner) - Various build system improvements (Jiri Olsa) - Add support for CoreSight trace decoding by making the perf tools use the external openCSD (Mathieu Poirier, Tor Jeremiassen) - Add ARM Statistical Profiling Extensions (SPE) support (Kim Phillips) - libtraceevent updates (Steven Rostedt) - Intel vendor event JSON updates (Andi Kleen) - Introduce 'perf report --mmaps' and 'perf report --tasks' to show info present in 'perf.data' (Jiri Olsa, Arnaldo Carvalho de Melo) - Add infrastructure to record first and last sample time to the perf.data file header, so that when processing all samples in a 'perf record' session, such as when doing build-id processing, or when specifically requesting that that info be recorded, use that in 'perf report --time', that also got support for percent slices in addition to absolute ones. I.e. now it is possible to ask for the samples in the 10%-20% time slice of a perf.data file (Jin Yao) - Allow system wide 'perf stat --per-thread', sorting the result (Jin Yao) E.g.: [root@jouet ~]# perf stat --per-thread --metrics IPC ^C Performance counter stats for 'system wide': make-22229 23,012,094,032 inst_retired.any # 0.8 IPC cc1-22419 692,027,497 inst_retired.any # 0.8 IPC gcc-22418 328,231,855 inst_retired.any # 0.9 IPC cc1-22509 220,853,647 inst_retired.any # 0.8 IPC gcc-22486 199,874,810 inst_retired.any # 1.0 IPC as-22466 177,896,365 inst_retired.any # 0.9 IPC cc1-22465 150,732,374 inst_retired.any # 0.8 IPC gcc-22508 112,555,593 inst_retired.any # 0.9 IPC cc1-22487 108,964,079 inst_retired.any # 0.7 IPC qemu-system-x86-2697 21,330,550 inst_retired.any # 0.3 IPC systemd-journal-551 20,642,951 inst_retired.any # 0.4 IPC docker-containe-17651 9,552,892 inst_retired.any # 0.5 IPC dockerd-current-9809 7,528,586 inst_retired.any # 0.5 IPC make-22153 12,504,194,380 inst_retired.any # 0.8 IPC python2-22429 12,081,290,954 inst_retired.any # 0.8 IPC <SNIP> python2-22429 15,026,328,103 cpu_clk_unhalted.thread cc1-22419 826,660,193 cpu_clk_unhalted.thread gcc-22418 365,321,295 cpu_clk_unhalted.thread cc1-22509 279,169,362 cpu_clk_unhalted.thread gcc-22486 210,156,950 cpu_clk_unhalted.thread <SNIP> 5.638075538 seconds time elapsed [root@jouet ~]# - Improve shell auto-completion of perf events (Jin Yao) - 'perf probe' improvements (Masami Hiramatsu) - Improve PMU infrastructure to support amp64's ThunderX2 implementation defined core events (Ganapatrao Kulkarni) - Various annotation related improvements and fixes (Thomas Richter) - Clarify usage of 'overwrite' and 'backward' in the evlist/mmap code, removing the 'overwrite' parameter from several functions as it was always used it as 'false' (Wang Nan) - Fix/improve 'perf record' reverse recording support (Wang Nan) - Improve command line options documentation (Sihyeon Jang) - Optimize sample parsing for ordering events, where we don't need to parse all the PERF_SAMPLE_ bits, just the ones leading to the timestamp needed to reorder events (Jiri Olsa) - Generalize the annotation code to support other source information besides objdump/DWARF obtained ones, starting with python scripts, that will is slated to be merged soon (Jiri Olsa) - ... and a lot more that I failed to list, see the shortlog and changelog for details" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (262 commits) perf trace beauty flock: Move to separate object file perf evlist: Remove fcntl.h from evlist.h perf trace beauty futex: Beautify FUTEX_BITSET_MATCH_ANY perf trace: Do not print from time delta for interrupted syscall lines perf trace: Add --print-sample perf bpf: Remove misplaced __maybe_unused attribute MAINTAINERS: Adding entry for CoreSight trace decoding perf tools: Add mechanic to synthesise CoreSight trace packets perf tools: Add full support for CoreSight trace decoding pert tools: Add queue management functionality perf tools: Add functionality to communicate with the openCSD decoder perf tools: Add support for decoding CoreSight trace data perf tools: Add decoder mechanic to support dumping trace data perf tools: Add processing of coresight metadata perf tools: Add initial entry point for decoder CoreSight traces perf tools: Integrating the CoreSight decoding library perf vendor events intel: Update IvyTown files to V20 perf vendor events intel: Update IvyBridge files to V20 perf vendor events intel: Update BroadwellDE events to V7 perf vendor events intel: Update SkylakeX events to V1.06 ...
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Documentation/process/kernel-enforcement-statement.rst

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -118,6 +118,7 @@ we might work for today, have in the past, or will in the future.
118118
- Mike Marshall
119119
- Chris Mason
120120
- Paul E. McKenney
121+
- Arnaldo Carvalho de Melo
121122
- David S. Miller
122123
- Ingo Molnar
123124
- Kuninori Morimoto

MAINTAINERS

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1327,7 +1327,8 @@ F: tools/perf/arch/arm/util/pmu.c
13271327
F: tools/perf/arch/arm/util/auxtrace.c
13281328
F: tools/perf/arch/arm/util/cs-etm.c
13291329
F: tools/perf/arch/arm/util/cs-etm.h
1330-
F: tools/perf/util/cs-etm.h
1330+
F: tools/perf/util/cs-etm.*
1331+
F: tools/perf/util/cs-etm-decoder/*
13311332

13321333
ARM/CORGI MACHINE SUPPORT
13331334
M: Richard Purdie <[email protected]>

arch/x86/events/msr.c

Lines changed: 43 additions & 27 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,9 @@ enum perf_msr_id {
1010
PERF_MSR_SMI = 4,
1111
PERF_MSR_PTSC = 5,
1212
PERF_MSR_IRPERF = 6,
13-
13+
PERF_MSR_THERM = 7,
14+
PERF_MSR_THERM_SNAP = 8,
15+
PERF_MSR_THERM_UNIT = 9,
1416
PERF_MSR_EVENT_MAX,
1517
};
1618

@@ -29,6 +31,11 @@ static bool test_irperf(int idx)
2931
return boot_cpu_has(X86_FEATURE_IRPERF);
3032
}
3133

34+
static bool test_therm_status(int idx)
35+
{
36+
return boot_cpu_has(X86_FEATURE_DTHERM);
37+
}
38+
3239
static bool test_intel(int idx)
3340
{
3441
if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL ||
@@ -95,22 +102,28 @@ struct perf_msr {
95102
bool (*test)(int idx);
96103
};
97104

98-
PMU_EVENT_ATTR_STRING(tsc, evattr_tsc, "event=0x00");
99-
PMU_EVENT_ATTR_STRING(aperf, evattr_aperf, "event=0x01");
100-
PMU_EVENT_ATTR_STRING(mperf, evattr_mperf, "event=0x02");
101-
PMU_EVENT_ATTR_STRING(pperf, evattr_pperf, "event=0x03");
102-
PMU_EVENT_ATTR_STRING(smi, evattr_smi, "event=0x04");
103-
PMU_EVENT_ATTR_STRING(ptsc, evattr_ptsc, "event=0x05");
104-
PMU_EVENT_ATTR_STRING(irperf, evattr_irperf, "event=0x06");
105+
PMU_EVENT_ATTR_STRING(tsc, evattr_tsc, "event=0x00" );
106+
PMU_EVENT_ATTR_STRING(aperf, evattr_aperf, "event=0x01" );
107+
PMU_EVENT_ATTR_STRING(mperf, evattr_mperf, "event=0x02" );
108+
PMU_EVENT_ATTR_STRING(pperf, evattr_pperf, "event=0x03" );
109+
PMU_EVENT_ATTR_STRING(smi, evattr_smi, "event=0x04" );
110+
PMU_EVENT_ATTR_STRING(ptsc, evattr_ptsc, "event=0x05" );
111+
PMU_EVENT_ATTR_STRING(irperf, evattr_irperf, "event=0x06" );
112+
PMU_EVENT_ATTR_STRING(cpu_thermal_margin, evattr_therm, "event=0x07" );
113+
PMU_EVENT_ATTR_STRING(cpu_thermal_margin.snapshot, evattr_therm_snap, "1" );
114+
PMU_EVENT_ATTR_STRING(cpu_thermal_margin.unit, evattr_therm_unit, "C" );
105115

106116
static struct perf_msr msr[] = {
107-
[PERF_MSR_TSC] = { 0, &evattr_tsc, NULL, },
108-
[PERF_MSR_APERF] = { MSR_IA32_APERF, &evattr_aperf, test_aperfmperf, },
109-
[PERF_MSR_MPERF] = { MSR_IA32_MPERF, &evattr_mperf, test_aperfmperf, },
110-
[PERF_MSR_PPERF] = { MSR_PPERF, &evattr_pperf, test_intel, },
111-
[PERF_MSR_SMI] = { MSR_SMI_COUNT, &evattr_smi, test_intel, },
112-
[PERF_MSR_PTSC] = { MSR_F15H_PTSC, &evattr_ptsc, test_ptsc, },
113-
[PERF_MSR_IRPERF] = { MSR_F17H_IRPERF, &evattr_irperf, test_irperf, },
117+
[PERF_MSR_TSC] = { 0, &evattr_tsc, NULL, },
118+
[PERF_MSR_APERF] = { MSR_IA32_APERF, &evattr_aperf, test_aperfmperf, },
119+
[PERF_MSR_MPERF] = { MSR_IA32_MPERF, &evattr_mperf, test_aperfmperf, },
120+
[PERF_MSR_PPERF] = { MSR_PPERF, &evattr_pperf, test_intel, },
121+
[PERF_MSR_SMI] = { MSR_SMI_COUNT, &evattr_smi, test_intel, },
122+
[PERF_MSR_PTSC] = { MSR_F15H_PTSC, &evattr_ptsc, test_ptsc, },
123+
[PERF_MSR_IRPERF] = { MSR_F17H_IRPERF, &evattr_irperf, test_irperf, },
124+
[PERF_MSR_THERM] = { MSR_IA32_THERM_STATUS, &evattr_therm, test_therm_status, },
125+
[PERF_MSR_THERM_SNAP] = { MSR_IA32_THERM_STATUS, &evattr_therm_snap, test_therm_status, },
126+
[PERF_MSR_THERM_UNIT] = { MSR_IA32_THERM_STATUS, &evattr_therm_unit, test_therm_status, },
114127
};
115128

116129
static struct attribute *events_attrs[PERF_MSR_EVENT_MAX + 1] = {
@@ -161,9 +174,9 @@ static int msr_event_init(struct perf_event *event)
161174
if (!msr[cfg].attr)
162175
return -EINVAL;
163176

164-
event->hw.idx = -1;
165-
event->hw.event_base = msr[cfg].msr;
166-
event->hw.config = cfg;
177+
event->hw.idx = -1;
178+
event->hw.event_base = msr[cfg].msr;
179+
event->hw.config = cfg;
167180

168181
return 0;
169182
}
@@ -184,7 +197,7 @@ static void msr_event_update(struct perf_event *event)
184197
u64 prev, now;
185198
s64 delta;
186199

187-
/* Careful, an NMI might modify the previous event value. */
200+
/* Careful, an NMI might modify the previous event value: */
188201
again:
189202
prev = local64_read(&event->hw.prev_count);
190203
now = msr_read_counter(event);
@@ -193,17 +206,22 @@ static void msr_event_update(struct perf_event *event)
193206
goto again;
194207

195208
delta = now - prev;
196-
if (unlikely(event->hw.event_base == MSR_SMI_COUNT))
209+
if (unlikely(event->hw.event_base == MSR_SMI_COUNT)) {
197210
delta = sign_extend64(delta, 31);
198-
199-
local64_add(delta, &event->count);
211+
local64_add(delta, &event->count);
212+
} else if (unlikely(event->hw.event_base == MSR_IA32_THERM_STATUS)) {
213+
/* If valid, extract digital readout, otherwise set to -1: */
214+
now = now & (1ULL << 31) ? (now >> 16) & 0x3f : -1;
215+
local64_set(&event->count, now);
216+
} else {
217+
local64_add(delta, &event->count);
218+
}
200219
}
201220

202221
static void msr_event_start(struct perf_event *event, int flags)
203222
{
204-
u64 now;
223+
u64 now = msr_read_counter(event);
205224

206-
now = msr_read_counter(event);
207225
local64_set(&event->hw.prev_count, now);
208226
}
209227

@@ -250,9 +268,7 @@ static int __init msr_init(void)
250268
for (i = PERF_MSR_TSC + 1; i < PERF_MSR_EVENT_MAX; i++) {
251269
u64 val;
252270

253-
/*
254-
* Virt sucks arse; you cannot tell if a R/O MSR is present :/
255-
*/
271+
/* Virt sucks; you cannot tell if a R/O MSR is present :/ */
256272
if (!msr[i].test(i) || rdmsrl_safe(msr[i].msr, &val))
257273
msr[i].attr = NULL;
258274
}

arch/x86/include/asm/uprobes.h

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -53,6 +53,10 @@ struct arch_uprobe {
5353
u8 fixups;
5454
u8 ilen;
5555
} defparam;
56+
struct {
57+
u8 reg_offset; /* to the start of pt_regs */
58+
u8 ilen;
59+
} push;
5660
};
5761
};
5862

arch/x86/kernel/uprobes.c

Lines changed: 103 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -528,11 +528,11 @@ static int default_pre_xol_op(struct arch_uprobe *auprobe, struct pt_regs *regs)
528528
return 0;
529529
}
530530

531-
static int push_ret_address(struct pt_regs *regs, unsigned long ip)
531+
static int emulate_push_stack(struct pt_regs *regs, unsigned long val)
532532
{
533533
unsigned long new_sp = regs->sp - sizeof_long();
534534

535-
if (copy_to_user((void __user *)new_sp, &ip, sizeof_long()))
535+
if (copy_to_user((void __user *)new_sp, &val, sizeof_long()))
536536
return -EFAULT;
537537

538538
regs->sp = new_sp;
@@ -566,7 +566,7 @@ static int default_post_xol_op(struct arch_uprobe *auprobe, struct pt_regs *regs
566566
regs->ip += correction;
567567
} else if (auprobe->defparam.fixups & UPROBE_FIX_CALL) {
568568
regs->sp += sizeof_long(); /* Pop incorrect return address */
569-
if (push_ret_address(regs, utask->vaddr + auprobe->defparam.ilen))
569+
if (emulate_push_stack(regs, utask->vaddr + auprobe->defparam.ilen))
570570
return -ERESTART;
571571
}
572572
/* popf; tell the caller to not touch TF */
@@ -655,7 +655,7 @@ static bool branch_emulate_op(struct arch_uprobe *auprobe, struct pt_regs *regs)
655655
*
656656
* But there is corner case, see the comment in ->post_xol().
657657
*/
658-
if (push_ret_address(regs, new_ip))
658+
if (emulate_push_stack(regs, new_ip))
659659
return false;
660660
} else if (!check_jmp_cond(auprobe, regs)) {
661661
offs = 0;
@@ -665,6 +665,16 @@ static bool branch_emulate_op(struct arch_uprobe *auprobe, struct pt_regs *regs)
665665
return true;
666666
}
667667

668+
static bool push_emulate_op(struct arch_uprobe *auprobe, struct pt_regs *regs)
669+
{
670+
unsigned long *src_ptr = (void *)regs + auprobe->push.reg_offset;
671+
672+
if (emulate_push_stack(regs, *src_ptr))
673+
return false;
674+
regs->ip += auprobe->push.ilen;
675+
return true;
676+
}
677+
668678
static int branch_post_xol_op(struct arch_uprobe *auprobe, struct pt_regs *regs)
669679
{
670680
BUG_ON(!branch_is_call(auprobe));
@@ -703,6 +713,10 @@ static const struct uprobe_xol_ops branch_xol_ops = {
703713
.post_xol = branch_post_xol_op,
704714
};
705715

716+
static const struct uprobe_xol_ops push_xol_ops = {
717+
.emulate = push_emulate_op,
718+
};
719+
706720
/* Returns -ENOSYS if branch_xol_ops doesn't handle this insn */
707721
static int branch_setup_xol_ops(struct arch_uprobe *auprobe, struct insn *insn)
708722
{
@@ -750,6 +764,87 @@ static int branch_setup_xol_ops(struct arch_uprobe *auprobe, struct insn *insn)
750764
return 0;
751765
}
752766

767+
/* Returns -ENOSYS if push_xol_ops doesn't handle this insn */
768+
static int push_setup_xol_ops(struct arch_uprobe *auprobe, struct insn *insn)
769+
{
770+
u8 opc1 = OPCODE1(insn), reg_offset = 0;
771+
772+
if (opc1 < 0x50 || opc1 > 0x57)
773+
return -ENOSYS;
774+
775+
if (insn->length > 2)
776+
return -ENOSYS;
777+
if (insn->length == 2) {
778+
/* only support rex_prefix 0x41 (x64 only) */
779+
#ifdef CONFIG_X86_64
780+
if (insn->rex_prefix.nbytes != 1 ||
781+
insn->rex_prefix.bytes[0] != 0x41)
782+
return -ENOSYS;
783+
784+
switch (opc1) {
785+
case 0x50:
786+
reg_offset = offsetof(struct pt_regs, r8);
787+
break;
788+
case 0x51:
789+
reg_offset = offsetof(struct pt_regs, r9);
790+
break;
791+
case 0x52:
792+
reg_offset = offsetof(struct pt_regs, r10);
793+
break;
794+
case 0x53:
795+
reg_offset = offsetof(struct pt_regs, r11);
796+
break;
797+
case 0x54:
798+
reg_offset = offsetof(struct pt_regs, r12);
799+
break;
800+
case 0x55:
801+
reg_offset = offsetof(struct pt_regs, r13);
802+
break;
803+
case 0x56:
804+
reg_offset = offsetof(struct pt_regs, r14);
805+
break;
806+
case 0x57:
807+
reg_offset = offsetof(struct pt_regs, r15);
808+
break;
809+
}
810+
#else
811+
return -ENOSYS;
812+
#endif
813+
} else {
814+
switch (opc1) {
815+
case 0x50:
816+
reg_offset = offsetof(struct pt_regs, ax);
817+
break;
818+
case 0x51:
819+
reg_offset = offsetof(struct pt_regs, cx);
820+
break;
821+
case 0x52:
822+
reg_offset = offsetof(struct pt_regs, dx);
823+
break;
824+
case 0x53:
825+
reg_offset = offsetof(struct pt_regs, bx);
826+
break;
827+
case 0x54:
828+
reg_offset = offsetof(struct pt_regs, sp);
829+
break;
830+
case 0x55:
831+
reg_offset = offsetof(struct pt_regs, bp);
832+
break;
833+
case 0x56:
834+
reg_offset = offsetof(struct pt_regs, si);
835+
break;
836+
case 0x57:
837+
reg_offset = offsetof(struct pt_regs, di);
838+
break;
839+
}
840+
}
841+
842+
auprobe->push.reg_offset = reg_offset;
843+
auprobe->push.ilen = insn->length;
844+
auprobe->ops = &push_xol_ops;
845+
return 0;
846+
}
847+
753848
/**
754849
* arch_uprobe_analyze_insn - instruction analysis including validity and fixups.
755850
* @mm: the probed address space.
@@ -771,6 +866,10 @@ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm,
771866
if (ret != -ENOSYS)
772867
return ret;
773868

869+
ret = push_setup_xol_ops(auprobe, &insn);
870+
if (ret != -ENOSYS)
871+
return ret;
872+
774873
/*
775874
* Figure out which fixups default_post_xol_op() will need to perform,
776875
* and annotate defparam->fixups accordingly.

arch/x86/tools/Makefile

Lines changed: 6 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -13,28 +13,28 @@ else
1313
posttest_64bit = -n
1414
endif
1515

16-
distill_awk = $(srctree)/arch/x86/tools/distill.awk
16+
reformatter = $(srctree)/arch/x86/tools/objdump_reformat.awk
1717
chkobjdump = $(srctree)/arch/x86/tools/chkobjdump.awk
1818

1919
quiet_cmd_posttest = TEST $@
20-
cmd_posttest = ($(OBJDUMP) -v | $(AWK) -f $(chkobjdump)) || $(OBJDUMP) -d -j .text $(objtree)/vmlinux | $(AWK) -f $(distill_awk) | $(obj)/test_get_len $(posttest_64bit) $(posttest_verbose)
20+
cmd_posttest = ($(OBJDUMP) -v | $(AWK) -f $(chkobjdump)) || $(OBJDUMP) -d -j .text $(objtree)/vmlinux | $(AWK) -f $(reformatter) | $(obj)/insn_decoder_test $(posttest_64bit) $(posttest_verbose)
2121

2222
quiet_cmd_sanitytest = TEST $@
2323
cmd_sanitytest = $(obj)/insn_sanity $(posttest_64bit) -m 1000000
2424

25-
posttest: $(obj)/test_get_len vmlinux $(obj)/insn_sanity
25+
posttest: $(obj)/insn_decoder_test vmlinux $(obj)/insn_sanity
2626
$(call cmd,posttest)
2727
$(call cmd,sanitytest)
2828

29-
hostprogs-y += test_get_len insn_sanity
29+
hostprogs-y += insn_decoder_test insn_sanity
3030

3131
# -I needed for generated C source and C source which in the kernel tree.
32-
HOSTCFLAGS_test_get_len.o := -Wall -I$(objtree)/arch/x86/lib/ -I$(srctree)/arch/x86/include/uapi/ -I$(srctree)/arch/x86/include/ -I$(srctree)/arch/x86/lib/ -I$(srctree)/include/uapi/
32+
HOSTCFLAGS_insn_decoder_test.o := -Wall -I$(objtree)/arch/x86/lib/ -I$(srctree)/arch/x86/include/uapi/ -I$(srctree)/arch/x86/include/ -I$(srctree)/arch/x86/lib/ -I$(srctree)/include/uapi/
3333

3434
HOSTCFLAGS_insn_sanity.o := -Wall -I$(objtree)/arch/x86/lib/ -I$(srctree)/arch/x86/include/ -I$(srctree)/arch/x86/lib/ -I$(srctree)/include/
3535

3636
# Dependencies are also needed.
37-
$(obj)/test_get_len.o: $(srctree)/arch/x86/lib/insn.c $(srctree)/arch/x86/lib/inat.c $(srctree)/arch/x86/include/asm/inat_types.h $(srctree)/arch/x86/include/asm/inat.h $(srctree)/arch/x86/include/asm/insn.h $(objtree)/arch/x86/lib/inat-tables.c
37+
$(obj)/insn_decoder_test.o: $(srctree)/arch/x86/lib/insn.c $(srctree)/arch/x86/lib/inat.c $(srctree)/arch/x86/include/asm/inat_types.h $(srctree)/arch/x86/include/asm/inat.h $(srctree)/arch/x86/include/asm/insn.h $(objtree)/arch/x86/lib/inat-tables.c
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$(obj)/insn_sanity.o: $(srctree)/arch/x86/lib/insn.c $(srctree)/arch/x86/lib/inat.c $(srctree)/arch/x86/include/asm/inat_types.h $(srctree)/arch/x86/include/asm/inat.h $(srctree)/arch/x86/include/asm/insn.h $(objtree)/arch/x86/lib/inat-tables.c
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