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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 14:23:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 14:23:52 -0800
commite71d5126e77c68b7ed1fad275fdc8825e9597448 (patch)
tree038f23568881d65cb269c9c4b92e65a2d7131456 /tools/perf
parentc3e9c04b89059a4c93c792da883ca284de182da5 (diff)
parentab35727eb879ccc9487c6df0a3796be124ed39d3 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull second round of s390 updates from Martin Schwidefsky: - rework of the vdso code to avoid the use of the access register mode - use perf AUX buffers for the transport of diagnostic sample data - add perf_regs and user stack dump support - enable perf call graphs for user space programs - add perf register support for floating-point registers - all remaining s390 related timer_setup conversions - bug fixes and cleanups * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (30 commits) s390: remove unused parameter from Makefile zfcp: purely mechanical update using timer API, plus blank lines s390/scsi: Convert timers to use timer_setup() s390/cpum_sf: correctly set the PID and TID in perf samples s390/cpum_sf: load program parameter at sampler enablement s390/perf: add perf register support for floating-point registers s390/perf: extend perf_regs support to include floating-point registers s390/perf: define common DWARF register string table s390/perf: add support for perf_regs and libdw s390/perf: add perf_regs support and user stack dump s390/cpum_sf: do not register PMU if no sampling mode is authorized s390/cpumf: remove raw event support in basic-only sampling mode s390/perf: add callback to perf to enable using AUX buffer s390/cpumf: enable using AUX buffer s390/cpumf: introduce AUX buffer for dump diagnostic sample data s390/disassembler: increase show_code buffer size s390: Remove CONFIG_HARDENED_USERCOPY s390: enable CPU alternatives unconditionally s390/nmi: remove unused code s390/mm: remove unused code ...
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/Makefile.config6
-rw-r--r--tools/perf/arch/s390/include/dwarf-regs-table.h71
-rw-r--r--tools/perf/arch/s390/include/perf_regs.h95
-rw-r--r--tools/perf/arch/s390/util/Build3
-rw-r--r--tools/perf/arch/s390/util/auxtrace.c118
-rw-r--r--tools/perf/arch/s390/util/dwarf-regs.c11
-rw-r--r--tools/perf/arch/s390/util/unwind-libdw.c63
7 files changed, 354 insertions, 13 deletions
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 63f534a0902f..ed65e82f034e 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -53,6 +53,10 @@ ifeq ($(SRCARCH),arm64)
LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
endif
+ifeq ($(ARCH),s390)
+ NO_PERF_REGS := 0
+endif
+
ifeq ($(NO_PERF_REGS),0)
$(call detected,CONFIG_PERF_REGS)
endif
@@ -61,7 +65,7 @@ endif
# Disable it on all other architectures in case libdw unwind
# support is detected in system. Add supported architectures
# to the check.
-ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm powerpc))
+ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm powerpc s390))
NO_LIBDW_DWARF_UNWIND := 1
endif
diff --git a/tools/perf/arch/s390/include/dwarf-regs-table.h b/tools/perf/arch/s390/include/dwarf-regs-table.h
index 792d4c277225..671553525f41 100644
--- a/tools/perf/arch/s390/include/dwarf-regs-table.h
+++ b/tools/perf/arch/s390/include/dwarf-regs-table.h
@@ -1,9 +1,72 @@
/* SPDX-License-Identifier: GPL-2.0 */
-#ifdef DEFINE_DWARF_REGSTR_TABLE
-/* This is included in perf/util/dwarf-regs.c */
+#ifndef S390_DWARF_REGS_TABLE_H
+#define S390_DWARF_REGS_TABLE_H
-static const char * const s390_regstr_tbl[] = {
+#define REG_DWARFNUM_NAME(reg, idx) [idx] = "%" #reg
+
+/*
+ * For reference, see DWARF register mapping:
+ * http://refspecs.linuxfoundation.org/ELF/zSeries/lzsabi0_s390/x1542.html
+ */
+static const char * const s390_dwarf_regs[] = {
"%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",
"%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15",
+ REG_DWARFNUM_NAME(f0, 16),
+ REG_DWARFNUM_NAME(f1, 20),
+ REG_DWARFNUM_NAME(f2, 17),
+ REG_DWARFNUM_NAME(f3, 21),
+ REG_DWARFNUM_NAME(f4, 18),
+ REG_DWARFNUM_NAME(f5, 22),
+ REG_DWARFNUM_NAME(f6, 19),
+ REG_DWARFNUM_NAME(f7, 23),
+ REG_DWARFNUM_NAME(f8, 24),
+ REG_DWARFNUM_NAME(f9, 28),
+ REG_DWARFNUM_NAME(f10, 25),
+ REG_DWARFNUM_NAME(f11, 29),
+ REG_DWARFNUM_NAME(f12, 26),
+ REG_DWARFNUM_NAME(f13, 30),
+ REG_DWARFNUM_NAME(f14, 27),
+ REG_DWARFNUM_NAME(f15, 31),
+ REG_DWARFNUM_NAME(c0, 32),
+ REG_DWARFNUM_NAME(c1, 33),
+ REG_DWARFNUM_NAME(c2, 34),
+ REG_DWARFNUM_NAME(c3, 35),
+ REG_DWARFNUM_NAME(c4, 36),
+ REG_DWARFNUM_NAME(c5, 37),
+ REG_DWARFNUM_NAME(c6, 38),
+ REG_DWARFNUM_NAME(c7, 39),
+ REG_DWARFNUM_NAME(c8, 40),
+ REG_DWARFNUM_NAME(c9, 41),
+ REG_DWARFNUM_NAME(c10, 42),
+ REG_DWARFNUM_NAME(c11, 43),
+ REG_DWARFNUM_NAME(c12, 44),
+ REG_DWARFNUM_NAME(c13, 45),
+ REG_DWARFNUM_NAME(c14, 46),
+ REG_DWARFNUM_NAME(c15, 47),
+ REG_DWARFNUM_NAME(a0, 48),
+ REG_DWARFNUM_NAME(a1, 49),
+ REG_DWARFNUM_NAME(a2, 50),
+ REG_DWARFNUM_NAME(a3, 51),
+ REG_DWARFNUM_NAME(a4, 52),
+ REG_DWARFNUM_NAME(a5, 53),
+ REG_DWARFNUM_NAME(a6, 54),
+ REG_DWARFNUM_NAME(a7, 55),
+ REG_DWARFNUM_NAME(a8, 56),
+ REG_DWARFNUM_NAME(a9, 57),
+ REG_DWARFNUM_NAME(a10, 58),
+ REG_DWARFNUM_NAME(a11, 59),
+ REG_DWARFNUM_NAME(a12, 60),
+ REG_DWARFNUM_NAME(a13, 61),
+ REG_DWARFNUM_NAME(a14, 62),
+ REG_DWARFNUM_NAME(a15, 63),
+ REG_DWARFNUM_NAME(pswm, 64),
+ REG_DWARFNUM_NAME(pswa, 65),
};
-#endif
+
+#ifdef DEFINE_DWARF_REGSTR_TABLE
+/* This is included in perf/util/dwarf-regs.c */
+
+#define s390_regstr_tbl s390_dwarf_regs
+
+#endif /* DEFINE_DWARF_REGSTR_TABLE */
+#endif /* S390_DWARF_REGS_TABLE_H */
diff --git a/tools/perf/arch/s390/include/perf_regs.h b/tools/perf/arch/s390/include/perf_regs.h
new file mode 100644
index 000000000000..d2df54a6bc5a
--- /dev/null
+++ b/tools/perf/arch/s390/include/perf_regs.h
@@ -0,0 +1,95 @@
+#ifndef ARCH_PERF_REGS_H
+#define ARCH_PERF_REGS_H
+
+#include <stdlib.h>
+#include <linux/types.h>
+#include <../../../../arch/s390/include/uapi/asm/perf_regs.h>
+
+void perf_regs_load(u64 *regs);
+
+#define PERF_REGS_MASK ((1ULL << PERF_REG_S390_MAX) - 1)
+#define PERF_REGS_MAX PERF_REG_S390_MAX
+#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_64
+
+#define PERF_REG_IP PERF_REG_S390_PC
+#define PERF_REG_SP PERF_REG_S390_R15
+
+static inline const char *perf_reg_name(int id)
+{
+ switch (id) {
+ case PERF_REG_S390_R0:
+ return "R0";
+ case PERF_REG_S390_R1:
+ return "R1";
+ case PERF_REG_S390_R2:
+ return "R2";
+ case PERF_REG_S390_R3:
+ return "R3";
+ case PERF_REG_S390_R4:
+ return "R4";
+ case PERF_REG_S390_R5:
+ return "R5";
+ case PERF_REG_S390_R6:
+ return "R6";
+ case PERF_REG_S390_R7:
+ return "R7";
+ case PERF_REG_S390_R8:
+ return "R8";
+ case PERF_REG_S390_R9:
+ return "R9";
+ case PERF_REG_S390_R10:
+ return "R10";
+ case PERF_REG_S390_R11:
+ return "R11";
+ case PERF_REG_S390_R12:
+ return "R12";
+ case PERF_REG_S390_R13:
+ return "R13";
+ case PERF_REG_S390_R14:
+ return "R14";
+ case PERF_REG_S390_R15:
+ return "R15";
+ case PERF_REG_S390_FP0:
+ return "FP0";
+ case PERF_REG_S390_FP1:
+ return "FP1";
+ case PERF_REG_S390_FP2:
+ return "FP2";
+ case PERF_REG_S390_FP3:
+ return "FP3";
+ case PERF_REG_S390_FP4:
+ return "FP4";
+ case PERF_REG_S390_FP5:
+ return "FP5";
+ case PERF_REG_S390_FP6:
+ return "FP6";
+ case PERF_REG_S390_FP7:
+ return "FP7";
+ case PERF_REG_S390_FP8:
+ return "FP8";
+ case PERF_REG_S390_FP9:
+ return "FP9";
+ case PERF_REG_S390_FP10:
+ return "FP10";
+ case PERF_REG_S390_FP11:
+ return "FP11";
+ case PERF_REG_S390_FP12:
+ return "FP12";
+ case PERF_REG_S390_FP13:
+ return "FP13";
+ case PERF_REG_S390_FP14:
+ return "FP14";
+ case PERF_REG_S390_FP15:
+ return "FP15";
+ case PERF_REG_S390_MASK:
+ return "MASK";
+ case PERF_REG_S390_PC:
+ return "PC";
+ default:
+ return NULL;
+ }
+
+ return NULL;
+}
+
+#endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/s390/util/Build b/tools/perf/arch/s390/util/Build
index 5bd7b9260cc0..4a233683c684 100644
--- a/tools/perf/arch/s390/util/Build
+++ b/tools/perf/arch/s390/util/Build
@@ -2,5 +2,8 @@ libperf-y += header.o
libperf-y += kvm-stat.o
libperf-$(CONFIG_DWARF) += dwarf-regs.o
+libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
libperf-y += machine.o
+
+libperf-$(CONFIG_AUXTRACE) += auxtrace.o
diff --git a/tools/perf/arch/s390/util/auxtrace.c b/tools/perf/arch/s390/util/auxtrace.c
new file mode 100644
index 000000000000..6cb48e4cffd9
--- /dev/null
+++ b/tools/perf/arch/s390/util/auxtrace.c
@@ -0,0 +1,118 @@
+#include <stdbool.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/log2.h>
+
+#include "../../util/evlist.h"
+#include "../../util/auxtrace.h"
+#include "../../util/evsel.h"
+
+#define PERF_EVENT_CPUM_SF 0xB0000 /* Event: Basic-sampling */
+#define PERF_EVENT_CPUM_SF_DIAG 0xBD000 /* Event: Combined-sampling */
+#define DEFAULT_AUX_PAGES 128
+#define DEFAULT_FREQ 4000
+
+static void cpumsf_free(struct auxtrace_record *itr)
+{
+ free(itr);
+}
+
+static size_t cpumsf_info_priv_size(struct auxtrace_record *itr __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ return 0;
+}
+
+static int
+cpumsf_info_fill(struct auxtrace_record *itr __maybe_unused,
+ struct perf_session *session __maybe_unused,
+ struct auxtrace_info_event *auxtrace_info __maybe_unused,
+ size_t priv_size __maybe_unused)
+{
+ return 0;
+}
+
+static unsigned long
+cpumsf_reference(struct auxtrace_record *itr __maybe_unused)
+{
+ return 0;
+}
+
+static int
+cpumsf_recording_options(struct auxtrace_record *ar __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused,
+ struct record_opts *opts)
+{
+ unsigned int factor = 1;
+ unsigned int pages;
+
+ opts->full_auxtrace = true;
+
+ /*
+ * The AUX buffer size should be set properly to avoid
+ * overflow of samples if it is not set explicitly.
+ * DEFAULT_AUX_PAGES is an proper size when sampling frequency
+ * is DEFAULT_FREQ. It is expected to hold about 1/2 second
+ * of sampling data. The size used for AUX buffer will scale
+ * according to the specified frequency and DEFAULT_FREQ.
+ */
+ if (!opts->auxtrace_mmap_pages) {
+ if (opts->user_freq != UINT_MAX)
+ factor = (opts->user_freq + DEFAULT_FREQ
+ - 1) / DEFAULT_FREQ;
+ pages = DEFAULT_AUX_PAGES * factor;
+ opts->auxtrace_mmap_pages = roundup_pow_of_two(pages);
+ }
+
+ return 0;
+}
+
+static int
+cpumsf_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
+ struct record_opts *opts __maybe_unused,
+ const char *str __maybe_unused)
+{
+ return 0;
+}
+
+/*
+ * auxtrace_record__init is called when perf record
+ * check if the event really need auxtrace
+ */
+struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
+ int *err)
+{
+ struct auxtrace_record *aux;
+ struct perf_evsel *pos;
+ int diagnose = 0;
+
+ if (evlist->nr_entries == 0)
+ return NULL;
+
+ evlist__for_each_entry(evlist, pos) {
+ if (pos->attr.config == PERF_EVENT_CPUM_SF_DIAG) {
+ diagnose = 1;
+ break;
+ }
+ }
+
+ if (!diagnose)
+ return NULL;
+
+ /* sampling in diagnose mode. alloc aux buffer */
+ aux = zalloc(sizeof(*aux));
+ if (aux == NULL) {
+ *err = -ENOMEM;
+ return NULL;
+ }
+
+ aux->parse_snapshot_options = cpumsf_parse_snapshot_options;
+ aux->recording_options = cpumsf_recording_options;
+ aux->info_priv_size = cpumsf_info_priv_size;
+ aux->info_fill = cpumsf_info_fill;
+ aux->free = cpumsf_free;
+ aux->reference = cpumsf_reference;
+
+ return aux;
+}
diff --git a/tools/perf/arch/s390/util/dwarf-regs.c b/tools/perf/arch/s390/util/dwarf-regs.c
index 0dff5b2ed1e5..f47576ce13ea 100644
--- a/tools/perf/arch/s390/util/dwarf-regs.c
+++ b/tools/perf/arch/s390/util/dwarf-regs.c
@@ -9,15 +9,10 @@
#include <stddef.h>
#include <dwarf-regs.h>
-
-#define NUM_GPRS 16
-
-static const char *gpr_names[NUM_GPRS] = {
- "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",
- "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15",
-};
+#include <linux/kernel.h>
+#include "dwarf-regs-table.h"
const char *get_arch_regstr(unsigned int n)
{
- return (n >= NUM_GPRS) ? NULL : gpr_names[n];
+ return (n >= ARRAY_SIZE(s390_dwarf_regs)) ? NULL : s390_dwarf_regs[n];
}
diff --git a/tools/perf/arch/s390/util/unwind-libdw.c b/tools/perf/arch/s390/util/unwind-libdw.c
new file mode 100644
index 000000000000..387c698cdd1b
--- /dev/null
+++ b/tools/perf/arch/s390/util/unwind-libdw.c
@@ -0,0 +1,63 @@
+#include <linux/kernel.h>
+#include <elfutils/libdwfl.h>
+#include "../../util/unwind-libdw.h"
+#include "../../util/perf_regs.h"
+#include "../../util/event.h"
+#include "dwarf-regs-table.h"
+
+
+bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
+{
+ struct unwind_info *ui = arg;
+ struct regs_dump *user_regs = &ui->sample->user_regs;
+ Dwarf_Word dwarf_regs[ARRAY_SIZE(s390_dwarf_regs)];
+
+#define REG(r) ({ \
+ Dwarf_Word val = 0; \
+ perf_reg_value(&val, user_regs, PERF_REG_S390_##r); \
+ val; \
+})
+ /*
+ * For DWARF register mapping details,
+ * see also perf/arch/s390/include/dwarf-regs-table.h
+ */
+ dwarf_regs[0] = REG(R0);
+ dwarf_regs[1] = REG(R1);
+ dwarf_regs[2] = REG(R2);
+ dwarf_regs[3] = REG(R3);
+ dwarf_regs[4] = REG(R4);
+ dwarf_regs[5] = REG(R5);
+ dwarf_regs[6] = REG(R6);
+ dwarf_regs[7] = REG(R7);
+ dwarf_regs[8] = REG(R8);
+ dwarf_regs[9] = REG(R9);
+ dwarf_regs[10] = REG(R10);
+ dwarf_regs[11] = REG(R11);
+ dwarf_regs[12] = REG(R12);
+ dwarf_regs[13] = REG(R13);
+ dwarf_regs[14] = REG(R14);
+ dwarf_regs[15] = REG(R15);
+
+ dwarf_regs[16] = REG(FP0);
+ dwarf_regs[17] = REG(FP2);
+ dwarf_regs[18] = REG(FP4);
+ dwarf_regs[19] = REG(FP6);
+ dwarf_regs[20] = REG(FP1);
+ dwarf_regs[21] = REG(FP3);
+ dwarf_regs[22] = REG(FP5);
+ dwarf_regs[23] = REG(FP7);
+ dwarf_regs[24] = REG(FP8);
+ dwarf_regs[25] = REG(FP10);
+ dwarf_regs[26] = REG(FP12);
+ dwarf_regs[27] = REG(FP14);
+ dwarf_regs[28] = REG(FP9);
+ dwarf_regs[29] = REG(FP11);
+ dwarf_regs[30] = REG(FP13);
+ dwarf_regs[31] = REG(FP15);
+
+ dwarf_regs[64] = REG(MASK);
+ dwarf_regs[65] = REG(PC);
+
+ dwfl_thread_state_register_pc(thread, dwarf_regs[65]);
+ return dwfl_thread_state_registers(thread, 0, 32, dwarf_regs);
+}