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-rw-r--r--kernel/tools/testing/selftests/powerpc/Makefile53
-rw-r--r--kernel/tools/testing/selftests/powerpc/copyloops/.gitignore4
-rw-r--r--kernel/tools/testing/selftests/powerpc/copyloops/Makefile25
-rw-r--r--kernel/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h56
-rw-r--r--kernel/tools/testing/selftests/powerpc/copyloops/asm/processor.h0
l---------kernel/tools/testing/selftests/powerpc/copyloops/copyuser_64.S1
l---------kernel/tools/testing/selftests/powerpc/copyloops/copyuser_power7.S1
l---------kernel/tools/testing/selftests/powerpc/copyloops/memcpy_64.S1
l---------kernel/tools/testing/selftests/powerpc/copyloops/memcpy_power7.S1
-rw-r--r--kernel/tools/testing/selftests/powerpc/copyloops/validate.c99
-rw-r--r--kernel/tools/testing/selftests/powerpc/harness.c161
-rw-r--r--kernel/tools/testing/selftests/powerpc/mm/.gitignore3
-rw-r--r--kernel/tools/testing/selftests/powerpc/mm/Makefile16
-rw-r--r--kernel/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c76
-rw-r--r--kernel/tools/testing/selftests/powerpc/mm/subpage_prot.c220
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/.gitignore3
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/Makefile42
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/count_instructions.c147
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/.gitignore22
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/Makefile30
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c106
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S271
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/close_clears_pmcc_test.c59
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_pinned_vs_ebb_test.c93
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_vs_ebb_test.c89
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c58
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c117
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c91
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c478
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.h77
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_handler.S365
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_child_test.c86
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c92
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_vs_cpu_event_test.c86
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/event_attributes_test.c131
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S43
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/fork_cleanup_test.c79
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/instruction_count_test.c164
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c100
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c91
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c109
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c61
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c106
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c93
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/reg.h49
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c39
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_pinned_vs_ebb_test.c91
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_vs_ebb_test.c83
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.c300
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.h41
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/event.c131
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/event.h43
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/l3_bank_test.c48
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/lib.c253
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/lib.h41
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/loop.S43
-rw-r--r--kernel/tools/testing/selftests/powerpc/pmu/per_event_excludes.c114
-rw-r--r--kernel/tools/testing/selftests/powerpc/primitives/.gitignore1
-rw-r--r--kernel/tools/testing/selftests/powerpc/primitives/Makefile12
l---------kernel/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h1
-rw-r--r--kernel/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h0
-rw-r--r--kernel/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c147
l---------kernel/tools/testing/selftests/powerpc/primitives/word-at-a-time.h1
-rw-r--r--kernel/tools/testing/selftests/powerpc/stringloops/.gitignore1
-rw-r--r--kernel/tools/testing/selftests/powerpc/stringloops/Makefile15
-rw-r--r--kernel/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h7
-rw-r--r--kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c103
l---------kernel/tools/testing/selftests/powerpc/stringloops/memcmp_64.S1
-rw-r--r--kernel/tools/testing/selftests/powerpc/subunit.h52
-rw-r--r--kernel/tools/testing/selftests/powerpc/switch_endian/.gitignore2
-rw-r--r--kernel/tools/testing/selftests/powerpc/switch_endian/Makefile24
-rw-r--r--kernel/tools/testing/selftests/powerpc/switch_endian/check.S100
-rw-r--r--kernel/tools/testing/selftests/powerpc/switch_endian/common.h6
-rw-r--r--kernel/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S81
-rw-r--r--kernel/tools/testing/selftests/powerpc/tm/.gitignore2
-rw-r--r--kernel/tools/testing/selftests/powerpc/tm/Makefile13
-rw-r--r--kernel/tools/testing/selftests/powerpc/tm/tm-resched-dscr.c98
-rw-r--r--kernel/tools/testing/selftests/powerpc/tm/tm-syscall-asm.S27
-rw-r--r--kernel/tools/testing/selftests/powerpc/tm/tm-syscall.c121
-rw-r--r--kernel/tools/testing/selftests/powerpc/utils.h50
-rw-r--r--kernel/tools/testing/selftests/powerpc/vphn/.gitignore1
-rw-r--r--kernel/tools/testing/selftests/powerpc/vphn/Makefile15
-rw-r--r--kernel/tools/testing/selftests/powerpc/vphn/test-vphn.c410
l---------kernel/tools/testing/selftests/powerpc/vphn/vphn.c1
l---------kernel/tools/testing/selftests/powerpc/vphn/vphn.h1
85 files changed, 6575 insertions, 0 deletions
diff --git a/kernel/tools/testing/selftests/powerpc/Makefile b/kernel/tools/testing/selftests/powerpc/Makefile
new file mode 100644
index 000000000..5ad042345
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/Makefile
@@ -0,0 +1,53 @@
+# Makefile for powerpc selftests
+
+# ARCH can be overridden by the user for cross compiling
+ARCH ?= $(shell uname -m)
+ARCH := $(shell echo $(ARCH) | sed -e s/ppc.*/powerpc/)
+
+ifeq ($(ARCH),powerpc)
+
+GIT_VERSION = $(shell git describe --always --long --dirty || echo "unknown")
+
+CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CURDIR) $(CFLAGS)
+
+export CFLAGS
+
+SUB_DIRS = pmu copyloops mm tm primitives stringloops vphn switch_endian
+
+endif
+
+all: $(SUB_DIRS)
+
+$(SUB_DIRS):
+ $(MAKE) -k -C $@ all
+
+include ../lib.mk
+
+override define RUN_TESTS
+ @for TARGET in $(SUB_DIRS); do \
+ $(MAKE) -C $$TARGET run_tests; \
+ done;
+endef
+
+override define INSTALL_RULE
+ @for TARGET in $(SUB_DIRS); do \
+ $(MAKE) -C $$TARGET install; \
+ done;
+endef
+
+override define EMIT_TESTS
+ @for TARGET in $(SUB_DIRS); do \
+ $(MAKE) -s -C $$TARGET emit_tests; \
+ done;
+endef
+
+clean:
+ @for TARGET in $(SUB_DIRS); do \
+ $(MAKE) -C $$TARGET clean; \
+ done;
+ rm -f tags
+
+tags:
+ find . -name '*.c' -o -name '*.h' | xargs ctags
+
+.PHONY: tags $(SUB_DIRS)
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/.gitignore b/kernel/tools/testing/selftests/powerpc/copyloops/.gitignore
new file mode 100644
index 000000000..25a192f62
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/.gitignore
@@ -0,0 +1,4 @@
+copyuser_64
+copyuser_power7
+memcpy_64
+memcpy_power7
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/Makefile b/kernel/tools/testing/selftests/powerpc/copyloops/Makefile
new file mode 100644
index 000000000..384843ea0
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/Makefile
@@ -0,0 +1,25 @@
+# The loops are all 64-bit code
+CFLAGS += -m64
+CFLAGS += -I$(CURDIR)
+CFLAGS += -D SELFTEST
+CFLAGS += -maltivec
+
+# Use our CFLAGS for the implicit .S rule
+ASFLAGS = $(CFLAGS)
+
+TEST_PROGS := copyuser_64 copyuser_power7 memcpy_64 memcpy_power7
+EXTRA_SOURCES := validate.c ../harness.c
+
+all: $(TEST_PROGS)
+
+copyuser_64: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_base
+copyuser_power7: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_power7
+memcpy_64: CPPFLAGS += -D COPY_LOOP=test_memcpy
+memcpy_power7: CPPFLAGS += -D COPY_LOOP=test_memcpy_power7
+
+$(TEST_PROGS): $(EXTRA_SOURCES)
+
+include ../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h b/kernel/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
new file mode 100644
index 000000000..50ae7d209
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
@@ -0,0 +1,56 @@
+#include <ppc-asm.h>
+
+#define CONFIG_ALTIVEC
+
+#define r1 1
+
+#define R14 r14
+#define R15 r15
+#define R16 r16
+#define R17 r17
+#define R18 r18
+#define R19 r19
+#define R20 r20
+#define R21 r21
+#define R22 r22
+#define R29 r29
+#define R30 r30
+#define R31 r31
+
+#define STACKFRAMESIZE 256
+#define STK_REG(i) (112 + ((i)-14)*8)
+
+#define _GLOBAL(A) FUNC_START(test_ ## A)
+#define _GLOBAL_TOC(A) _GLOBAL(A)
+
+#define PPC_MTOCRF(A, B) mtocrf A, B
+
+FUNC_START(enter_vmx_usercopy)
+ li r3,1
+ blr
+
+FUNC_START(exit_vmx_usercopy)
+ li r3,0
+ blr
+
+FUNC_START(enter_vmx_copy)
+ li r3,1
+ blr
+
+FUNC_START(exit_vmx_copy)
+ blr
+
+FUNC_START(memcpy_power7)
+ blr
+
+FUNC_START(__copy_tofrom_user_power7)
+ blr
+
+FUNC_START(__copy_tofrom_user_base)
+ blr
+
+#define BEGIN_FTR_SECTION
+#define FTR_SECTION_ELSE
+#define ALT_FTR_SECTION_END_IFCLR(x)
+#define ALT_FTR_SECTION_END(x, y)
+#define END_FTR_SECTION_IFCLR(x)
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/asm/processor.h b/kernel/tools/testing/selftests/powerpc/copyloops/asm/processor.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/asm/processor.h
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/copyuser_64.S b/kernel/tools/testing/selftests/powerpc/copyloops/copyuser_64.S
new file mode 120000
index 000000000..f1c418a25
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/copyuser_64.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/copyuser_64.S \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/copyuser_power7.S b/kernel/tools/testing/selftests/powerpc/copyloops/copyuser_power7.S
new file mode 120000
index 000000000..478689598
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/copyuser_power7.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/copyuser_power7.S \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/memcpy_64.S b/kernel/tools/testing/selftests/powerpc/copyloops/memcpy_64.S
new file mode 120000
index 000000000..cce33fb6f
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/memcpy_64.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/memcpy_64.S \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/memcpy_power7.S b/kernel/tools/testing/selftests/powerpc/copyloops/memcpy_power7.S
new file mode 120000
index 000000000..0d6fbfaf3
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/memcpy_power7.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/memcpy_power7.S \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/copyloops/validate.c b/kernel/tools/testing/selftests/powerpc/copyloops/validate.c
new file mode 100644
index 000000000..1750ff57e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/copyloops/validate.c
@@ -0,0 +1,99 @@
+#include <malloc.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include "../utils.h"
+
+#define MAX_LEN 8192
+#define MAX_OFFSET 16
+#define MIN_REDZONE 128
+#define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE)
+#define POISON 0xa5
+
+unsigned long COPY_LOOP(void *to, const void *from, unsigned long size);
+
+static void do_one(char *src, char *dst, unsigned long src_off,
+ unsigned long dst_off, unsigned long len, void *redzone,
+ void *fill)
+{
+ char *srcp, *dstp;
+ unsigned long ret;
+ unsigned long i;
+
+ srcp = src + MIN_REDZONE + src_off;
+ dstp = dst + MIN_REDZONE + dst_off;
+
+ memset(src, POISON, BUFLEN);
+ memset(dst, POISON, BUFLEN);
+ memcpy(srcp, fill, len);
+
+ ret = COPY_LOOP(dstp, srcp, len);
+ if (ret && ret != (unsigned long)dstp) {
+ printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret);
+ abort();
+ }
+
+ if (memcmp(dstp, srcp, len)) {
+ printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len);
+ printf("src: ");
+ for (i = 0; i < len; i++)
+ printf("%02x ", srcp[i]);
+ printf("\ndst: ");
+ for (i = 0; i < len; i++)
+ printf("%02x ", dstp[i]);
+ printf("\n");
+ abort();
+ }
+
+ if (memcmp(dst, redzone, dstp - dst)) {
+ printf("(%p,%p,%ld) redzone before corrupted\n",
+ dstp, srcp, len);
+ abort();
+ }
+
+ if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) {
+ printf("(%p,%p,%ld) redzone after corrupted\n",
+ dstp, srcp, len);
+ abort();
+ }
+}
+
+int test_copy_loop(void)
+{
+ char *src, *dst, *redzone, *fill;
+ unsigned long len, src_off, dst_off;
+ unsigned long i;
+
+ src = memalign(BUFLEN, BUFLEN);
+ dst = memalign(BUFLEN, BUFLEN);
+ redzone = malloc(BUFLEN);
+ fill = malloc(BUFLEN);
+
+ if (!src || !dst || !redzone || !fill) {
+ fprintf(stderr, "malloc failed\n");
+ exit(1);
+ }
+
+ memset(redzone, POISON, BUFLEN);
+
+ /* Fill with sequential bytes */
+ for (i = 0; i < BUFLEN; i++)
+ fill[i] = i & 0xff;
+
+ for (len = 1; len < MAX_LEN; len++) {
+ for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
+ for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
+ do_one(src, dst, src_off, dst_off, len,
+ redzone, fill);
+ }
+ }
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_copy_loop, str(COPY_LOOP));
+}
diff --git a/kernel/tools/testing/selftests/powerpc/harness.c b/kernel/tools/testing/selftests/powerpc/harness.c
new file mode 100644
index 000000000..f7997affd
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/harness.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <elf.h>
+#include <fcntl.h>
+#include <link.h>
+#include <sys/stat.h>
+
+#include "subunit.h"
+#include "utils.h"
+
+#define TIMEOUT 120
+#define KILL_TIMEOUT 5
+
+
+int run_test(int (test_function)(void), char *name)
+{
+ bool terminated;
+ int rc, status;
+ pid_t pid;
+
+ /* Make sure output is flushed before forking */
+ fflush(stdout);
+
+ pid = fork();
+ if (pid == 0) {
+ setpgid(0, 0);
+ exit(test_function());
+ } else if (pid == -1) {
+ perror("fork");
+ return 1;
+ }
+
+ setpgid(pid, pid);
+
+ /* Wake us up in timeout seconds */
+ alarm(TIMEOUT);
+ terminated = false;
+
+wait:
+ rc = waitpid(pid, &status, 0);
+ if (rc == -1) {
+ if (errno != EINTR) {
+ printf("unknown error from waitpid\n");
+ return 1;
+ }
+
+ if (terminated) {
+ printf("!! force killing %s\n", name);
+ kill(-pid, SIGKILL);
+ return 1;
+ } else {
+ printf("!! killing %s\n", name);
+ kill(-pid, SIGTERM);
+ terminated = true;
+ alarm(KILL_TIMEOUT);
+ goto wait;
+ }
+ }
+
+ /* Kill anything else in the process group that is still running */
+ kill(-pid, SIGTERM);
+
+ if (WIFEXITED(status))
+ status = WEXITSTATUS(status);
+ else {
+ if (WIFSIGNALED(status))
+ printf("!! child died by signal %d\n", WTERMSIG(status));
+ else
+ printf("!! child died by unknown cause\n");
+
+ status = 1; /* Signal or other */
+ }
+
+ return status;
+}
+
+static void alarm_handler(int signum)
+{
+ /* Jut wake us up from waitpid */
+}
+
+static struct sigaction alarm_action = {
+ .sa_handler = alarm_handler,
+};
+
+int test_harness(int (test_function)(void), char *name)
+{
+ int rc;
+
+ test_start(name);
+ test_set_git_version(GIT_VERSION);
+
+ if (sigaction(SIGALRM, &alarm_action, NULL)) {
+ perror("sigaction");
+ test_error(name);
+ return 1;
+ }
+
+ rc = run_test(test_function, name);
+
+ if (rc == MAGIC_SKIP_RETURN_VALUE)
+ test_skip(name);
+ else
+ test_finish(name, rc);
+
+ return rc;
+}
+
+static char auxv[4096];
+
+void *get_auxv_entry(int type)
+{
+ ElfW(auxv_t) *p;
+ void *result;
+ ssize_t num;
+ int fd;
+
+ fd = open("/proc/self/auxv", O_RDONLY);
+ if (fd == -1) {
+ perror("open");
+ return NULL;
+ }
+
+ result = NULL;
+
+ num = read(fd, auxv, sizeof(auxv));
+ if (num < 0) {
+ perror("read");
+ goto out;
+ }
+
+ if (num > sizeof(auxv)) {
+ printf("Overflowed auxv buffer\n");
+ goto out;
+ }
+
+ p = (ElfW(auxv_t) *)auxv;
+
+ while (p->a_type != AT_NULL) {
+ if (p->a_type == type) {
+ result = (void *)p->a_un.a_val;
+ break;
+ }
+
+ p++;
+ }
+out:
+ close(fd);
+ return result;
+}
diff --git a/kernel/tools/testing/selftests/powerpc/mm/.gitignore b/kernel/tools/testing/selftests/powerpc/mm/.gitignore
new file mode 100644
index 000000000..b43ade0ec
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/mm/.gitignore
@@ -0,0 +1,3 @@
+hugetlb_vs_thp_test
+subpage_prot
+tempfile
diff --git a/kernel/tools/testing/selftests/powerpc/mm/Makefile b/kernel/tools/testing/selftests/powerpc/mm/Makefile
new file mode 100644
index 000000000..41cc3ed66
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/mm/Makefile
@@ -0,0 +1,16 @@
+noarg:
+ $(MAKE) -C ../
+
+TEST_PROGS := hugetlb_vs_thp_test subpage_prot
+
+all: $(TEST_PROGS) tempfile
+
+$(TEST_PROGS): ../harness.c
+
+include ../../lib.mk
+
+tempfile:
+ dd if=/dev/zero of=tempfile bs=64k count=1
+
+clean:
+ rm -f $(TEST_PROGS) tempfile
diff --git a/kernel/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c b/kernel/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c
new file mode 100644
index 000000000..49003674d
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c
@@ -0,0 +1,76 @@
+#include <stdio.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "utils.h"
+
+/* This must match the huge page & THP size */
+#define SIZE (16 * 1024 * 1024)
+
+static int test_body(void)
+{
+ void *addr;
+ char *p;
+
+ addr = (void *)0xa0000000;
+
+ p = mmap(addr, SIZE, PROT_READ | PROT_WRITE,
+ MAP_HUGETLB | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (p != MAP_FAILED) {
+ /*
+ * Typically the mmap will fail because no huge pages are
+ * allocated on the system. But if there are huge pages
+ * allocated the mmap will succeed. That's fine too, we just
+ * munmap here before continuing. munmap() length of
+ * MAP_HUGETLB memory must be hugepage aligned.
+ */
+ if (munmap(addr, SIZE)) {
+ perror("munmap");
+ return 1;
+ }
+ }
+
+ p = mmap(addr, SIZE, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (p == MAP_FAILED) {
+ printf("Mapping failed @ %p\n", addr);
+ perror("mmap");
+ return 1;
+ }
+
+ /*
+ * Either a user or kernel access is sufficient to trigger the bug.
+ * A kernel access is easier to spot & debug, as it will trigger the
+ * softlockup or RCU stall detectors, and when the system is kicked
+ * into xmon we get a backtrace in the kernel.
+ *
+ * A good option is:
+ * getcwd(p, SIZE);
+ *
+ * For the purposes of this testcase it's preferable to spin in
+ * userspace, so the harness can kill us if we get stuck. That way we
+ * see a test failure rather than a dead system.
+ */
+ *p = 0xf;
+
+ munmap(addr, SIZE);
+
+ return 0;
+}
+
+static int test_main(void)
+{
+ int i;
+
+ /* 10,000 because it's a "bunch", and completes reasonably quickly */
+ for (i = 0; i < 10000; i++)
+ if (test_body())
+ return 1;
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_main, "hugetlb_vs_thp");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/mm/subpage_prot.c b/kernel/tools/testing/selftests/powerpc/mm/subpage_prot.c
new file mode 100644
index 000000000..440180ff8
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/mm/subpage_prot.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/ptrace.h>
+#include <sys/syscall.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+#include "utils.h"
+
+char *file_name;
+
+int in_test;
+volatile int faulted;
+volatile void *dar;
+int errors;
+
+static void segv(int signum, siginfo_t *info, void *ctxt_v)
+{
+ ucontext_t *ctxt = (ucontext_t *)ctxt_v;
+ struct pt_regs *regs = ctxt->uc_mcontext.regs;
+
+ if (!in_test) {
+ fprintf(stderr, "Segfault outside of test !\n");
+ exit(1);
+ }
+
+ faulted = 1;
+ dar = (void *)regs->dar;
+ regs->nip += 4;
+}
+
+static inline void do_read(const volatile void *addr)
+{
+ int ret;
+
+ asm volatile("lwz %0,0(%1); twi 0,%0,0; isync;\n"
+ : "=r" (ret) : "r" (addr) : "memory");
+}
+
+static inline void do_write(const volatile void *addr)
+{
+ int val = 0x1234567;
+
+ asm volatile("stw %0,0(%1); sync; \n"
+ : : "r" (val), "r" (addr) : "memory");
+}
+
+static inline void check_faulted(void *addr, long page, long subpage, int write)
+{
+ int want_fault = (subpage == ((page + 3) % 16));
+
+ if (write)
+ want_fault |= (subpage == ((page + 1) % 16));
+
+ if (faulted != want_fault) {
+ printf("Failed at 0x%p (p=%ld,sp=%ld,w=%d), want=%s, got=%s !\n",
+ addr, page, subpage, write,
+ want_fault ? "fault" : "pass",
+ faulted ? "fault" : "pass");
+ ++errors;
+ }
+
+ if (faulted) {
+ if (dar != addr) {
+ printf("Fault expected at 0x%p and happened at 0x%p !\n",
+ addr, dar);
+ }
+ faulted = 0;
+ asm volatile("sync" : : : "memory");
+ }
+}
+
+static int run_test(void *addr, unsigned long size)
+{
+ unsigned int *map;
+ long i, j, pages, err;
+
+ pages = size / 0x10000;
+ map = malloc(pages * 4);
+ assert(map);
+
+ /*
+ * for each page, mark subpage i % 16 read only and subpage
+ * (i + 3) % 16 inaccessible
+ */
+ for (i = 0; i < pages; i++) {
+ map[i] = (0x40000000 >> (((i + 1) * 2) % 32)) |
+ (0xc0000000 >> (((i + 3) * 2) % 32));
+ }
+
+ err = syscall(__NR_subpage_prot, addr, size, map);
+ if (err) {
+ perror("subpage_perm");
+ return 1;
+ }
+ free(map);
+
+ in_test = 1;
+ errors = 0;
+ for (i = 0; i < pages; i++) {
+ for (j = 0; j < 16; j++, addr += 0x1000) {
+ do_read(addr);
+ check_faulted(addr, i, j, 0);
+ do_write(addr);
+ check_faulted(addr, i, j, 1);
+ }
+ }
+
+ in_test = 0;
+ if (errors) {
+ printf("%d errors detected\n", errors);
+ return 1;
+ }
+
+ return 0;
+}
+
+int test_anon(void)
+{
+ unsigned long align;
+ struct sigaction act = {
+ .sa_sigaction = segv,
+ .sa_flags = SA_SIGINFO
+ };
+ void *mallocblock;
+ unsigned long mallocsize;
+
+ if (getpagesize() != 0x10000) {
+ fprintf(stderr, "Kernel page size must be 64K!\n");
+ return 1;
+ }
+
+ sigaction(SIGSEGV, &act, NULL);
+
+ mallocsize = 4 * 16 * 1024 * 1024;
+
+ FAIL_IF(posix_memalign(&mallocblock, 64 * 1024, mallocsize));
+
+ align = (unsigned long)mallocblock;
+ if (align & 0xffff)
+ align = (align | 0xffff) + 1;
+
+ mallocblock = (void *)align;
+
+ printf("allocated malloc block of 0x%lx bytes at 0x%p\n",
+ mallocsize, mallocblock);
+
+ printf("testing malloc block...\n");
+
+ return run_test(mallocblock, mallocsize);
+}
+
+int test_file(void)
+{
+ struct sigaction act = {
+ .sa_sigaction = segv,
+ .sa_flags = SA_SIGINFO
+ };
+ void *fileblock;
+ off_t filesize;
+ int fd;
+
+ fd = open(file_name, O_RDWR);
+ if (fd == -1) {
+ perror("failed to open file");
+ return 1;
+ }
+ sigaction(SIGSEGV, &act, NULL);
+
+ filesize = lseek(fd, 0, SEEK_END);
+ if (filesize & 0xffff)
+ filesize &= ~0xfffful;
+
+ fileblock = mmap(NULL, filesize, PROT_READ | PROT_WRITE,
+ MAP_SHARED, fd, 0);
+ if (fileblock == MAP_FAILED) {
+ perror("failed to map file");
+ return 1;
+ }
+ printf("allocated %s for 0x%lx bytes at 0x%p\n",
+ file_name, filesize, fileblock);
+
+ printf("testing file map...\n");
+
+ return run_test(fileblock, filesize);
+}
+
+int main(int argc, char *argv[])
+{
+ test_harness(test_anon, "subpage_prot_anon");
+
+ if (argc > 1)
+ file_name = argv[1];
+ else
+ file_name = "tempfile";
+
+ test_harness(test_file, "subpage_prot_file");
+
+ return 0;
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/.gitignore b/kernel/tools/testing/selftests/powerpc/pmu/.gitignore
new file mode 100644
index 000000000..e748f336e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/.gitignore
@@ -0,0 +1,3 @@
+count_instructions
+l3_bank_test
+per_event_excludes
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/Makefile b/kernel/tools/testing/selftests/powerpc/pmu/Makefile
new file mode 100644
index 000000000..a9099d9f8
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/Makefile
@@ -0,0 +1,42 @@
+noarg:
+ $(MAKE) -C ../
+
+TEST_PROGS := count_instructions l3_bank_test per_event_excludes
+EXTRA_SOURCES := ../harness.c event.c lib.c
+
+all: $(TEST_PROGS) ebb
+
+$(TEST_PROGS): $(EXTRA_SOURCES)
+
+# loop.S can only be built 64-bit
+count_instructions: loop.S count_instructions.c $(EXTRA_SOURCES)
+ $(CC) $(CFLAGS) -m64 -o $@ $^
+
+include ../../lib.mk
+
+DEFAULT_RUN_TESTS := $(RUN_TESTS)
+override define RUN_TESTS
+ $(DEFAULT_RUN_TESTS)
+ $(MAKE) -C ebb run_tests
+endef
+
+DEFAULT_EMIT_TESTS := $(EMIT_TESTS)
+override define EMIT_TESTS
+ $(DEFAULT_EMIT_TESTS)
+ $(MAKE) -s -C ebb emit_tests
+endef
+
+DEFAULT_INSTALL_RULE := $(INSTALL_RULE)
+override define INSTALL_RULE
+ $(DEFAULT_INSTALL_RULE)
+ $(MAKE) -C ebb install
+endef
+
+clean:
+ rm -f $(TEST_PROGS) loop.o
+ $(MAKE) -C ebb clean
+
+ebb:
+ $(MAKE) -k -C $@ all
+
+.PHONY: all run_tests clean ebb
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/count_instructions.c b/kernel/tools/testing/selftests/powerpc/pmu/count_instructions.c
new file mode 100644
index 000000000..4622117b2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/count_instructions.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sys/prctl.h>
+
+#include "event.h"
+#include "utils.h"
+#include "lib.h"
+
+extern void thirty_two_instruction_loop(u64 loops);
+
+static void setup_event(struct event *e, u64 config, char *name)
+{
+ event_init_opts(e, config, PERF_TYPE_HARDWARE, name);
+
+ e->attr.disabled = 1;
+ e->attr.exclude_kernel = 1;
+ e->attr.exclude_hv = 1;
+ e->attr.exclude_idle = 1;
+}
+
+static int do_count_loop(struct event *events, u64 instructions,
+ u64 overhead, bool report)
+{
+ s64 difference, expected;
+ double percentage;
+
+ prctl(PR_TASK_PERF_EVENTS_ENABLE);
+
+ /* Run for 1M instructions */
+ thirty_two_instruction_loop(instructions >> 5);
+
+ prctl(PR_TASK_PERF_EVENTS_DISABLE);
+
+ event_read(&events[0]);
+ event_read(&events[1]);
+
+ expected = instructions + overhead;
+ difference = events[0].result.value - expected;
+ percentage = (double)difference / events[0].result.value * 100;
+
+ if (report) {
+ event_report(&events[0]);
+ event_report(&events[1]);
+
+ printf("Looped for %llu instructions, overhead %llu\n", instructions, overhead);
+ printf("Expected %llu\n", expected);
+ printf("Actual %llu\n", events[0].result.value);
+ printf("Delta %lld, %f%%\n", difference, percentage);
+ }
+
+ event_reset(&events[0]);
+ event_reset(&events[1]);
+
+ if (difference < 0)
+ difference = -difference;
+
+ /* Tolerate a difference below 0.0001 % */
+ difference *= 10000 * 100;
+ if (difference / events[0].result.value)
+ return -1;
+
+ return 0;
+}
+
+/* Count how many instructions it takes to do a null loop */
+static u64 determine_overhead(struct event *events)
+{
+ u64 current, overhead;
+ int i;
+
+ do_count_loop(events, 0, 0, false);
+ overhead = events[0].result.value;
+
+ for (i = 0; i < 100; i++) {
+ do_count_loop(events, 0, 0, false);
+ current = events[0].result.value;
+ if (current < overhead) {
+ printf("Replacing overhead %llu with %llu\n", overhead, current);
+ overhead = current;
+ }
+ }
+
+ return overhead;
+}
+
+static int test_body(void)
+{
+ struct event events[2];
+ u64 overhead;
+
+ setup_event(&events[0], PERF_COUNT_HW_INSTRUCTIONS, "instructions");
+ setup_event(&events[1], PERF_COUNT_HW_CPU_CYCLES, "cycles");
+
+ if (event_open(&events[0])) {
+ perror("perf_event_open");
+ return -1;
+ }
+
+ if (event_open_with_group(&events[1], events[0].fd)) {
+ perror("perf_event_open");
+ return -1;
+ }
+
+ overhead = determine_overhead(events);
+ printf("Overhead of null loop: %llu instructions\n", overhead);
+
+ /* Run for 1Mi instructions */
+ FAIL_IF(do_count_loop(events, 1000000, overhead, true));
+
+ /* Run for 10Mi instructions */
+ FAIL_IF(do_count_loop(events, 10000000, overhead, true));
+
+ /* Run for 100Mi instructions */
+ FAIL_IF(do_count_loop(events, 100000000, overhead, true));
+
+ /* Run for 1Bi instructions */
+ FAIL_IF(do_count_loop(events, 1000000000, overhead, true));
+
+ /* Run for 16Bi instructions */
+ FAIL_IF(do_count_loop(events, 16000000000, overhead, true));
+
+ /* Run for 64Bi instructions */
+ FAIL_IF(do_count_loop(events, 64000000000, overhead, true));
+
+ event_close(&events[0]);
+ event_close(&events[1]);
+
+ return 0;
+}
+
+static int count_instructions(void)
+{
+ return eat_cpu(test_body);
+}
+
+int main(void)
+{
+ return test_harness(count_instructions, "count_instructions");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/.gitignore b/kernel/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
new file mode 100644
index 000000000..42bddbed8
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
@@ -0,0 +1,22 @@
+reg_access_test
+event_attributes_test
+cycles_test
+cycles_with_freeze_test
+pmc56_overflow_test
+ebb_vs_cpu_event_test
+cpu_event_vs_ebb_test
+cpu_event_pinned_vs_ebb_test
+task_event_vs_ebb_test
+task_event_pinned_vs_ebb_test
+multi_ebb_procs_test
+multi_counter_test
+pmae_handling_test
+close_clears_pmcc_test
+instruction_count_test
+fork_cleanup_test
+ebb_on_child_test
+ebb_on_willing_child_test
+back_to_back_ebbs_test
+lost_exception_test
+no_handler_test
+cycles_with_mmcr2_test
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/kernel/tools/testing/selftests/powerpc/pmu/ebb/Makefile
new file mode 100644
index 000000000..5cdc9dbf2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/Makefile
@@ -0,0 +1,30 @@
+noarg:
+ $(MAKE) -C ../../
+
+# The EBB handler is 64-bit code and everything links against it
+CFLAGS += -m64
+
+TEST_PROGS := reg_access_test event_attributes_test cycles_test \
+ cycles_with_freeze_test pmc56_overflow_test \
+ ebb_vs_cpu_event_test cpu_event_vs_ebb_test \
+ cpu_event_pinned_vs_ebb_test task_event_vs_ebb_test \
+ task_event_pinned_vs_ebb_test multi_ebb_procs_test \
+ multi_counter_test pmae_handling_test \
+ close_clears_pmcc_test instruction_count_test \
+ fork_cleanup_test ebb_on_child_test \
+ ebb_on_willing_child_test back_to_back_ebbs_test \
+ lost_exception_test no_handler_test \
+ cycles_with_mmcr2_test
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../../harness.c ../event.c ../lib.c ebb.c ebb_handler.S trace.c busy_loop.S
+
+instruction_count_test: ../loop.S
+
+lost_exception_test: ../lib.c
+
+include ../../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS)
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
new file mode 100644
index 000000000..66ea765c0
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+
+
+#define NUMBER_OF_EBBS 50
+
+/*
+ * Test that if we overflow the counter while in the EBB handler, we take
+ * another EBB on exiting from the handler.
+ *
+ * We do this by counting with a stupidly low sample period, causing us to
+ * overflow the PMU while we're still in the EBB handler, leading to another
+ * EBB.
+ *
+ * We get out of what would otherwise be an infinite loop by leaving the
+ * counter frozen once we've taken enough EBBs.
+ */
+
+static void ebb_callee(void)
+{
+ uint64_t siar, val;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO)) {
+ ebb_state.stats.spurious++;
+ goto out;
+ }
+
+ ebb_state.stats.ebb_count++;
+ trace_log_counter(ebb_state.trace, ebb_state.stats.ebb_count);
+
+ /* Resets the PMC */
+ count_pmc(1, sample_period);
+
+out:
+ if (ebb_state.stats.ebb_count == NUMBER_OF_EBBS)
+ /* Reset but leave counters frozen */
+ reset_ebb_with_clear_mask(MMCR0_PMAO);
+ else
+ /* Unfreezes */
+ reset_ebb();
+
+ /* Do some stuff to chew some cycles and pop the counter */
+ siar = mfspr(SPRN_SIAR);
+ trace_log_reg(ebb_state.trace, SPRN_SIAR, siar);
+
+ val = mfspr(SPRN_PMC1);
+ trace_log_reg(ebb_state.trace, SPRN_PMC1, val);
+
+ val = mfspr(SPRN_MMCR0);
+ trace_log_reg(ebb_state.trace, SPRN_MMCR0, val);
+}
+
+int back_to_back_ebbs(void)
+{
+ struct event event;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ setup_ebb_handler(ebb_callee);
+
+ FAIL_IF(ebb_event_enable(&event));
+
+ sample_period = 5;
+
+ ebb_freeze_pmcs();
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+ ebb_global_enable();
+ ebb_unfreeze_pmcs();
+
+ while (ebb_state.stats.ebb_count < NUMBER_OF_EBBS)
+ FAIL_IF(core_busy_loop());
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count != NUMBER_OF_EBBS);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(back_to_back_ebbs, "back_to_back_ebbs");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S b/kernel/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S
new file mode 100644
index 000000000..c7e4093f1
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <ppc-asm.h>
+
+ .text
+
+FUNC_START(core_busy_loop)
+ stdu %r1, -168(%r1)
+ std r14, 160(%r1)
+ std r15, 152(%r1)
+ std r16, 144(%r1)
+ std r17, 136(%r1)
+ std r18, 128(%r1)
+ std r19, 120(%r1)
+ std r20, 112(%r1)
+ std r21, 104(%r1)
+ std r22, 96(%r1)
+ std r23, 88(%r1)
+ std r24, 80(%r1)
+ std r25, 72(%r1)
+ std r26, 64(%r1)
+ std r27, 56(%r1)
+ std r28, 48(%r1)
+ std r29, 40(%r1)
+ std r30, 32(%r1)
+ std r31, 24(%r1)
+
+ li r3, 0x3030
+ std r3, -96(%r1)
+ li r4, 0x4040
+ std r4, -104(%r1)
+ li r5, 0x5050
+ std r5, -112(%r1)
+ li r6, 0x6060
+ std r6, -120(%r1)
+ li r7, 0x7070
+ std r7, -128(%r1)
+ li r8, 0x0808
+ std r8, -136(%r1)
+ li r9, 0x0909
+ std r9, -144(%r1)
+ li r10, 0x1010
+ std r10, -152(%r1)
+ li r11, 0x1111
+ std r11, -160(%r1)
+ li r14, 0x1414
+ std r14, -168(%r1)
+ li r15, 0x1515
+ std r15, -176(%r1)
+ li r16, 0x1616
+ std r16, -184(%r1)
+ li r17, 0x1717
+ std r17, -192(%r1)
+ li r18, 0x1818
+ std r18, -200(%r1)
+ li r19, 0x1919
+ std r19, -208(%r1)
+ li r20, 0x2020
+ std r20, -216(%r1)
+ li r21, 0x2121
+ std r21, -224(%r1)
+ li r22, 0x2222
+ std r22, -232(%r1)
+ li r23, 0x2323
+ std r23, -240(%r1)
+ li r24, 0x2424
+ std r24, -248(%r1)
+ li r25, 0x2525
+ std r25, -256(%r1)
+ li r26, 0x2626
+ std r26, -264(%r1)
+ li r27, 0x2727
+ std r27, -272(%r1)
+ li r28, 0x2828
+ std r28, -280(%r1)
+ li r29, 0x2929
+ std r29, -288(%r1)
+ li r30, 0x3030
+ li r31, 0x3131
+
+ li r3, 0
+0: addi r3, r3, 1
+ cmpwi r3, 100
+ blt 0b
+
+ /* Return 1 (fail) unless we get through all the checks */
+ li r3, 1
+
+ /* Check none of our registers have been corrupted */
+ cmpwi r4, 0x4040
+ bne 1f
+ cmpwi r5, 0x5050
+ bne 1f
+ cmpwi r6, 0x6060
+ bne 1f
+ cmpwi r7, 0x7070
+ bne 1f
+ cmpwi r8, 0x0808
+ bne 1f
+ cmpwi r9, 0x0909
+ bne 1f
+ cmpwi r10, 0x1010
+ bne 1f
+ cmpwi r11, 0x1111
+ bne 1f
+ cmpwi r14, 0x1414
+ bne 1f
+ cmpwi r15, 0x1515
+ bne 1f
+ cmpwi r16, 0x1616
+ bne 1f
+ cmpwi r17, 0x1717
+ bne 1f
+ cmpwi r18, 0x1818
+ bne 1f
+ cmpwi r19, 0x1919
+ bne 1f
+ cmpwi r20, 0x2020
+ bne 1f
+ cmpwi r21, 0x2121
+ bne 1f
+ cmpwi r22, 0x2222
+ bne 1f
+ cmpwi r23, 0x2323
+ bne 1f
+ cmpwi r24, 0x2424
+ bne 1f
+ cmpwi r25, 0x2525
+ bne 1f
+ cmpwi r26, 0x2626
+ bne 1f
+ cmpwi r27, 0x2727
+ bne 1f
+ cmpwi r28, 0x2828
+ bne 1f
+ cmpwi r29, 0x2929
+ bne 1f
+ cmpwi r30, 0x3030
+ bne 1f
+ cmpwi r31, 0x3131
+ bne 1f
+
+ /* Load junk into all our registers before we reload them from the stack. */
+ li r3, 0xde
+ li r4, 0xad
+ li r5, 0xbe
+ li r6, 0xef
+ li r7, 0xde
+ li r8, 0xad
+ li r9, 0xbe
+ li r10, 0xef
+ li r11, 0xde
+ li r14, 0xad
+ li r15, 0xbe
+ li r16, 0xef
+ li r17, 0xde
+ li r18, 0xad
+ li r19, 0xbe
+ li r20, 0xef
+ li r21, 0xde
+ li r22, 0xad
+ li r23, 0xbe
+ li r24, 0xef
+ li r25, 0xde
+ li r26, 0xad
+ li r27, 0xbe
+ li r28, 0xef
+ li r29, 0xdd
+
+ ld r3, -96(%r1)
+ cmpwi r3, 0x3030
+ bne 1f
+ ld r4, -104(%r1)
+ cmpwi r4, 0x4040
+ bne 1f
+ ld r5, -112(%r1)
+ cmpwi r5, 0x5050
+ bne 1f
+ ld r6, -120(%r1)
+ cmpwi r6, 0x6060
+ bne 1f
+ ld r7, -128(%r1)
+ cmpwi r7, 0x7070
+ bne 1f
+ ld r8, -136(%r1)
+ cmpwi r8, 0x0808
+ bne 1f
+ ld r9, -144(%r1)
+ cmpwi r9, 0x0909
+ bne 1f
+ ld r10, -152(%r1)
+ cmpwi r10, 0x1010
+ bne 1f
+ ld r11, -160(%r1)
+ cmpwi r11, 0x1111
+ bne 1f
+ ld r14, -168(%r1)
+ cmpwi r14, 0x1414
+ bne 1f
+ ld r15, -176(%r1)
+ cmpwi r15, 0x1515
+ bne 1f
+ ld r16, -184(%r1)
+ cmpwi r16, 0x1616
+ bne 1f
+ ld r17, -192(%r1)
+ cmpwi r17, 0x1717
+ bne 1f
+ ld r18, -200(%r1)
+ cmpwi r18, 0x1818
+ bne 1f
+ ld r19, -208(%r1)
+ cmpwi r19, 0x1919
+ bne 1f
+ ld r20, -216(%r1)
+ cmpwi r20, 0x2020
+ bne 1f
+ ld r21, -224(%r1)
+ cmpwi r21, 0x2121
+ bne 1f
+ ld r22, -232(%r1)
+ cmpwi r22, 0x2222
+ bne 1f
+ ld r23, -240(%r1)
+ cmpwi r23, 0x2323
+ bne 1f
+ ld r24, -248(%r1)
+ cmpwi r24, 0x2424
+ bne 1f
+ ld r25, -256(%r1)
+ cmpwi r25, 0x2525
+ bne 1f
+ ld r26, -264(%r1)
+ cmpwi r26, 0x2626
+ bne 1f
+ ld r27, -272(%r1)
+ cmpwi r27, 0x2727
+ bne 1f
+ ld r28, -280(%r1)
+ cmpwi r28, 0x2828
+ bne 1f
+ ld r29, -288(%r1)
+ cmpwi r29, 0x2929
+ bne 1f
+
+ /* Load 0 (success) to return */
+ li r3, 0
+
+1: ld r14, 160(%r1)
+ ld r15, 152(%r1)
+ ld r16, 144(%r1)
+ ld r17, 136(%r1)
+ ld r18, 128(%r1)
+ ld r19, 120(%r1)
+ ld r20, 112(%r1)
+ ld r21, 104(%r1)
+ ld r22, 96(%r1)
+ ld r23, 88(%r1)
+ ld r24, 80(%r1)
+ ld r25, 72(%r1)
+ ld r26, 64(%r1)
+ ld r27, 56(%r1)
+ ld r28, 48(%r1)
+ ld r29, 40(%r1)
+ ld r30, 32(%r1)
+ ld r31, 24(%r1)
+ addi %r1, %r1, 168
+ blr
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/close_clears_pmcc_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/close_clears_pmcc_test.c
new file mode 100644
index 000000000..0f0423dba
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/close_clears_pmcc_test.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test that closing the EBB event clears MMCR0_PMCC, preventing further access
+ * by userspace to the PMU hardware.
+ */
+
+int close_clears_pmcc(void)
+{
+ struct event event;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ while (ebb_state.stats.ebb_count < 1)
+ FAIL_IF(core_busy_loop());
+
+ ebb_global_disable();
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ /* The real test is here, do we take a SIGILL when writing PMU regs now
+ * that we have closed the event. We expect that we will. */
+
+ FAIL_IF(catch_sigill(write_pmc1));
+
+ /* We should still be able to read EBB regs though */
+ mfspr(SPRN_EBBHR);
+ mfspr(SPRN_EBBRR);
+ mfspr(SPRN_BESCR);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(close_clears_pmcc, "close_clears_pmcc");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_pinned_vs_ebb_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_pinned_vs_ebb_test.c
new file mode 100644
index 000000000..d3ed64d5d
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_pinned_vs_ebb_test.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests a pinned cpu event vs an EBB - in that order. The pinned cpu event
+ * should remain and the EBB event should fail to enable.
+ */
+
+static int setup_cpu_event(struct event *event, int cpu)
+{
+ event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
+
+ event->attr.pinned = 1;
+
+ event->attr.exclude_kernel = 1;
+ event->attr.exclude_hv = 1;
+ event->attr.exclude_idle = 1;
+
+ SKIP_IF(require_paranoia_below(1));
+ FAIL_IF(event_open_with_cpu(event, cpu));
+ FAIL_IF(event_enable(event));
+
+ return 0;
+}
+
+int cpu_event_pinned_vs_ebb(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ int cpu, rc;
+ pid_t pid;
+
+ cpu = pick_online_cpu();
+ FAIL_IF(cpu < 0);
+ FAIL_IF(bind_to_cpu(cpu));
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(ebb_child(write_pipe, read_pipe));
+ }
+
+ /* We setup the cpu event first */
+ rc = setup_cpu_event(&event, cpu);
+ if (rc) {
+ kill_child_and_wait(pid);
+ return rc;
+ }
+
+ /* Signal the child to install its EBB event and wait */
+ if (sync_with_child(read_pipe, write_pipe))
+ /* If it fails, wait for it to exit */
+ goto wait;
+
+ /* Signal the child to run */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+wait:
+ /* We expect it to fail to read the event */
+ FAIL_IF(wait_for_child(pid) != 2);
+
+ FAIL_IF(event_disable(&event));
+ FAIL_IF(event_read(&event));
+
+ event_report(&event);
+
+ /* The cpu event should have run */
+ FAIL_IF(event.result.value == 0);
+ FAIL_IF(event.result.enabled != event.result.running);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(cpu_event_pinned_vs_ebb, "cpu_event_pinned_vs_ebb");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_vs_ebb_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_vs_ebb_test.c
new file mode 100644
index 000000000..8b972c2aa
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cpu_event_vs_ebb_test.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests a cpu event vs an EBB - in that order. The EBB should force the cpu
+ * event off the PMU.
+ */
+
+static int setup_cpu_event(struct event *event, int cpu)
+{
+ event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
+
+ event->attr.exclude_kernel = 1;
+ event->attr.exclude_hv = 1;
+ event->attr.exclude_idle = 1;
+
+ SKIP_IF(require_paranoia_below(1));
+ FAIL_IF(event_open_with_cpu(event, cpu));
+ FAIL_IF(event_enable(event));
+
+ return 0;
+}
+
+int cpu_event_vs_ebb(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ int cpu, rc;
+ pid_t pid;
+
+ cpu = pick_online_cpu();
+ FAIL_IF(cpu < 0);
+ FAIL_IF(bind_to_cpu(cpu));
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(ebb_child(write_pipe, read_pipe));
+ }
+
+ /* We setup the cpu event first */
+ rc = setup_cpu_event(&event, cpu);
+ if (rc) {
+ kill_child_and_wait(pid);
+ return rc;
+ }
+
+ /* Signal the child to install its EBB event and wait */
+ if (sync_with_child(read_pipe, write_pipe))
+ /* If it fails, wait for it to exit */
+ goto wait;
+
+ /* Signal the child to run */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+wait:
+ /* We expect the child to succeed */
+ FAIL_IF(wait_for_child(pid));
+
+ FAIL_IF(event_disable(&event));
+ FAIL_IF(event_read(&event));
+
+ event_report(&event);
+
+ /* The cpu event may have run */
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(cpu_event_vs_ebb, "cpu_event_vs_ebb");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
new file mode 100644
index 000000000..8590fc1bf
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+
+
+/*
+ * Basic test that counts user cycles and takes EBBs.
+ */
+int cycles(void)
+{
+ struct event event;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ while (ebb_state.stats.ebb_count < 10) {
+ FAIL_IF(core_busy_loop());
+ FAIL_IF(ebb_check_mmcr0());
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+ FAIL_IF(!ebb_check_count(1, sample_period, 100));
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(cycles, "cycles");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
new file mode 100644
index 000000000..754b3f200
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test of counting cycles while using MMCR0_FC (freeze counters) to only count
+ * parts of the code. This is complicated by the fact that FC is set by the
+ * hardware when the event overflows. We may take the EBB after we have set FC,
+ * so we have to be careful about whether we clear FC at the end of the EBB
+ * handler or not.
+ */
+
+static bool counters_frozen = false;
+static int ebbs_while_frozen = 0;
+
+static void ebb_callee(void)
+{
+ uint64_t mask, val;
+
+ mask = MMCR0_PMAO | MMCR0_FC;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO)) {
+ ebb_state.stats.spurious++;
+ goto out;
+ }
+
+ ebb_state.stats.ebb_count++;
+ trace_log_counter(ebb_state.trace, ebb_state.stats.ebb_count);
+
+ val = mfspr(SPRN_MMCR0);
+ trace_log_reg(ebb_state.trace, SPRN_MMCR0, val);
+
+ if (counters_frozen) {
+ trace_log_string(ebb_state.trace, "frozen");
+ ebbs_while_frozen++;
+ mask &= ~MMCR0_FC;
+ }
+
+ count_pmc(1, sample_period);
+out:
+ reset_ebb_with_clear_mask(mask);
+}
+
+int cycles_with_freeze(void)
+{
+ struct event event;
+ uint64_t val;
+ bool fc_cleared;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ setup_ebb_handler(ebb_callee);
+ ebb_global_enable();
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ fc_cleared = false;
+
+ /* Make sure we loop until we take at least one EBB */
+ while ((ebb_state.stats.ebb_count < 20 && !fc_cleared) ||
+ ebb_state.stats.ebb_count < 1)
+ {
+ counters_frozen = false;
+ mb();
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_FC);
+
+ FAIL_IF(core_busy_loop());
+
+ counters_frozen = true;
+ mb();
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) | MMCR0_FC);
+
+ val = mfspr(SPRN_MMCR0);
+ if (! (val & MMCR0_FC)) {
+ printf("Outside of loop, FC NOT set MMCR0 0x%lx\n", val);
+ fc_cleared = true;
+ }
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ printf("EBBs while frozen %d\n", ebbs_while_frozen);
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+ FAIL_IF(fc_cleared);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(cycles_with_freeze, "cycles_with_freeze");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
new file mode 100644
index 000000000..d43029b08
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test of counting cycles while manipulating the user accessible bits in MMCR2.
+ */
+
+/* We use two values because the first freezes PMC1 and so we would get no EBBs */
+#define MMCR2_EXPECTED_1 0x4020100804020000UL /* (FC1P|FC2P|FC3P|FC4P|FC5P|FC6P) */
+#define MMCR2_EXPECTED_2 0x0020100804020000UL /* ( FC2P|FC3P|FC4P|FC5P|FC6P) */
+
+
+int cycles_with_mmcr2(void)
+{
+ struct event event;
+ uint64_t val, expected[2], actual;
+ int i;
+ bool bad_mmcr2;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ /* XXX Set of MMCR2 must be after enable */
+ expected[0] = MMCR2_EXPECTED_1;
+ expected[1] = MMCR2_EXPECTED_2;
+ i = 0;
+ bad_mmcr2 = false;
+
+ /* Make sure we loop until we take at least one EBB */
+ while ((ebb_state.stats.ebb_count < 20 && !bad_mmcr2) ||
+ ebb_state.stats.ebb_count < 1)
+ {
+ mtspr(SPRN_MMCR2, expected[i % 2]);
+
+ FAIL_IF(core_busy_loop());
+
+ val = mfspr(SPRN_MMCR2);
+ if (val != expected[i % 2]) {
+ bad_mmcr2 = true;
+ actual = val;
+ }
+
+ i++;
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ if (bad_mmcr2)
+ printf("Bad MMCR2 value seen is 0x%lx\n", actual);
+
+ FAIL_IF(bad_mmcr2);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(cycles_with_mmcr2, "cycles_with_mmcr2");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
new file mode 100644
index 000000000..d7a72ce69
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
@@ -0,0 +1,478 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE /* For CPU_ZERO etc. */
+
+#include <sched.h>
+#include <sys/wait.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "trace.h"
+#include "reg.h"
+#include "ebb.h"
+
+
+void (*ebb_user_func)(void);
+
+void ebb_hook(void)
+{
+ if (ebb_user_func)
+ ebb_user_func();
+}
+
+struct ebb_state ebb_state;
+
+u64 sample_period = 0x40000000ull;
+
+void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask)
+{
+ u64 val;
+
+ /* 2) clear MMCR0[PMAO] - docs say BESCR[PMEO] should do this */
+ /* 3) set MMCR0[PMAE] - docs say BESCR[PME] should do this */
+ val = mfspr(SPRN_MMCR0);
+ mtspr(SPRN_MMCR0, (val & ~mmcr0_clear_mask) | MMCR0_PMAE);
+
+ /* 4) clear BESCR[PMEO] */
+ mtspr(SPRN_BESCRR, BESCR_PMEO);
+
+ /* 5) set BESCR[PME] */
+ mtspr(SPRN_BESCRS, BESCR_PME);
+
+ /* 6) rfebb 1 - done in our caller */
+}
+
+void reset_ebb(void)
+{
+ reset_ebb_with_clear_mask(MMCR0_PMAO | MMCR0_FC);
+}
+
+/* Called outside of the EBB handler to check MMCR0 is sane */
+int ebb_check_mmcr0(void)
+{
+ u64 val;
+
+ val = mfspr(SPRN_MMCR0);
+ if ((val & (MMCR0_FC | MMCR0_PMAO)) == MMCR0_FC) {
+ /* It's OK if we see FC & PMAO, but not FC by itself */
+ printf("Outside of loop, only FC set 0x%llx\n", val);
+ return 1;
+ }
+
+ return 0;
+}
+
+bool ebb_check_count(int pmc, u64 sample_period, int fudge)
+{
+ u64 count, upper, lower;
+
+ count = ebb_state.stats.pmc_count[PMC_INDEX(pmc)];
+
+ lower = ebb_state.stats.ebb_count * (sample_period - fudge);
+
+ if (count < lower) {
+ printf("PMC%d count (0x%llx) below lower limit 0x%llx (-0x%llx)\n",
+ pmc, count, lower, lower - count);
+ return false;
+ }
+
+ upper = ebb_state.stats.ebb_count * (sample_period + fudge);
+
+ if (count > upper) {
+ printf("PMC%d count (0x%llx) above upper limit 0x%llx (+0x%llx)\n",
+ pmc, count, upper, count - upper);
+ return false;
+ }
+
+ printf("PMC%d count (0x%llx) is between 0x%llx and 0x%llx delta +0x%llx/-0x%llx\n",
+ pmc, count, lower, upper, count - lower, upper - count);
+
+ return true;
+}
+
+void standard_ebb_callee(void)
+{
+ int found, i;
+ u64 val;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO)) {
+ ebb_state.stats.spurious++;
+ goto out;
+ }
+
+ ebb_state.stats.ebb_count++;
+ trace_log_counter(ebb_state.trace, ebb_state.stats.ebb_count);
+
+ val = mfspr(SPRN_MMCR0);
+ trace_log_reg(ebb_state.trace, SPRN_MMCR0, val);
+
+ found = 0;
+ for (i = 1; i <= 6; i++) {
+ if (ebb_state.pmc_enable[PMC_INDEX(i)])
+ found += count_pmc(i, sample_period);
+ }
+
+ if (!found)
+ ebb_state.stats.no_overflow++;
+
+out:
+ reset_ebb();
+}
+
+extern void ebb_handler(void);
+
+void setup_ebb_handler(void (*callee)(void))
+{
+ u64 entry;
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+ entry = (u64)ebb_handler;
+#else
+ struct opd
+ {
+ u64 entry;
+ u64 toc;
+ } *opd;
+
+ opd = (struct opd *)ebb_handler;
+ entry = opd->entry;
+#endif
+ printf("EBB Handler is at %#llx\n", entry);
+
+ ebb_user_func = callee;
+
+ /* Ensure ebb_user_func is set before we set the handler */
+ mb();
+ mtspr(SPRN_EBBHR, entry);
+
+ /* Make sure the handler is set before we return */
+ mb();
+}
+
+void clear_ebb_stats(void)
+{
+ memset(&ebb_state.stats, 0, sizeof(ebb_state.stats));
+}
+
+void dump_summary_ebb_state(void)
+{
+ printf("ebb_state:\n" \
+ " ebb_count = %d\n" \
+ " spurious = %d\n" \
+ " negative = %d\n" \
+ " no_overflow = %d\n" \
+ " pmc[1] count = 0x%llx\n" \
+ " pmc[2] count = 0x%llx\n" \
+ " pmc[3] count = 0x%llx\n" \
+ " pmc[4] count = 0x%llx\n" \
+ " pmc[5] count = 0x%llx\n" \
+ " pmc[6] count = 0x%llx\n",
+ ebb_state.stats.ebb_count, ebb_state.stats.spurious,
+ ebb_state.stats.negative, ebb_state.stats.no_overflow,
+ ebb_state.stats.pmc_count[0], ebb_state.stats.pmc_count[1],
+ ebb_state.stats.pmc_count[2], ebb_state.stats.pmc_count[3],
+ ebb_state.stats.pmc_count[4], ebb_state.stats.pmc_count[5]);
+}
+
+static char *decode_mmcr0(u32 value)
+{
+ static char buf[16];
+
+ buf[0] = '\0';
+
+ if (value & (1 << 31))
+ strcat(buf, "FC ");
+ if (value & (1 << 26))
+ strcat(buf, "PMAE ");
+ if (value & (1 << 7))
+ strcat(buf, "PMAO ");
+
+ return buf;
+}
+
+static char *decode_bescr(u64 value)
+{
+ static char buf[16];
+
+ buf[0] = '\0';
+
+ if (value & (1ull << 63))
+ strcat(buf, "GE ");
+ if (value & (1ull << 32))
+ strcat(buf, "PMAE ");
+ if (value & 1)
+ strcat(buf, "PMAO ");
+
+ return buf;
+}
+
+void dump_ebb_hw_state(void)
+{
+ u64 bescr;
+ u32 mmcr0;
+
+ mmcr0 = mfspr(SPRN_MMCR0);
+ bescr = mfspr(SPRN_BESCR);
+
+ printf("HW state:\n" \
+ "MMCR0 0x%016x %s\n" \
+ "MMCR2 0x%016lx\n" \
+ "EBBHR 0x%016lx\n" \
+ "BESCR 0x%016llx %s\n" \
+ "PMC1 0x%016lx\n" \
+ "PMC2 0x%016lx\n" \
+ "PMC3 0x%016lx\n" \
+ "PMC4 0x%016lx\n" \
+ "PMC5 0x%016lx\n" \
+ "PMC6 0x%016lx\n" \
+ "SIAR 0x%016lx\n",
+ mmcr0, decode_mmcr0(mmcr0), mfspr(SPRN_MMCR2),
+ mfspr(SPRN_EBBHR), bescr, decode_bescr(bescr),
+ mfspr(SPRN_PMC1), mfspr(SPRN_PMC2), mfspr(SPRN_PMC3),
+ mfspr(SPRN_PMC4), mfspr(SPRN_PMC5), mfspr(SPRN_PMC6),
+ mfspr(SPRN_SIAR));
+}
+
+void dump_ebb_state(void)
+{
+ dump_summary_ebb_state();
+
+ dump_ebb_hw_state();
+
+ trace_buffer_print(ebb_state.trace);
+}
+
+int count_pmc(int pmc, uint32_t sample_period)
+{
+ uint32_t start_value;
+ u64 val;
+
+ /* 0) Read PMC */
+ start_value = pmc_sample_period(sample_period);
+
+ val = read_pmc(pmc);
+ if (val < start_value)
+ ebb_state.stats.negative++;
+ else
+ ebb_state.stats.pmc_count[PMC_INDEX(pmc)] += val - start_value;
+
+ trace_log_reg(ebb_state.trace, SPRN_PMC1 + pmc - 1, val);
+
+ /* 1) Reset PMC */
+ write_pmc(pmc, start_value);
+
+ /* Report if we overflowed */
+ return val >= COUNTER_OVERFLOW;
+}
+
+int ebb_event_enable(struct event *e)
+{
+ int rc;
+
+ /* Ensure any SPR writes are ordered vs us */
+ mb();
+
+ rc = ioctl(e->fd, PERF_EVENT_IOC_ENABLE);
+ if (rc)
+ return rc;
+
+ rc = event_read(e);
+
+ /* Ditto */
+ mb();
+
+ return rc;
+}
+
+void ebb_freeze_pmcs(void)
+{
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) | MMCR0_FC);
+ mb();
+}
+
+void ebb_unfreeze_pmcs(void)
+{
+ /* Unfreeze counters */
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_FC);
+ mb();
+}
+
+void ebb_global_enable(void)
+{
+ /* Enable EBBs globally and PMU EBBs */
+ mtspr(SPRN_BESCR, 0x8000000100000000ull);
+ mb();
+}
+
+void ebb_global_disable(void)
+{
+ /* Disable EBBs & freeze counters, events are still scheduled */
+ mtspr(SPRN_BESCRR, BESCR_PME);
+ mb();
+}
+
+void event_ebb_init(struct event *e)
+{
+ e->attr.config |= (1ull << 63);
+}
+
+void event_bhrb_init(struct event *e, unsigned ifm)
+{
+ e->attr.config |= (1ull << 62) | ((u64)ifm << 60);
+}
+
+void event_leader_ebb_init(struct event *e)
+{
+ event_ebb_init(e);
+
+ e->attr.exclusive = 1;
+ e->attr.pinned = 1;
+}
+
+int ebb_child(union pipe read_pipe, union pipe write_pipe)
+{
+ struct event event;
+ uint64_t val;
+
+ FAIL_IF(wait_for_parent(read_pipe));
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(event_enable(&event));
+
+ if (event_read(&event)) {
+ /*
+ * Some tests expect to fail here, so don't report an error on
+ * this line, and return a distinguisable error code. Tell the
+ * parent an error happened.
+ */
+ notify_parent_of_error(write_pipe);
+ return 2;
+ }
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ FAIL_IF(notify_parent(write_pipe));
+ FAIL_IF(wait_for_parent(read_pipe));
+ FAIL_IF(notify_parent(write_pipe));
+
+ while (ebb_state.stats.ebb_count < 20) {
+ FAIL_IF(core_busy_loop());
+
+ /* To try and hit SIGILL case */
+ val = mfspr(SPRN_MMCRA);
+ val |= mfspr(SPRN_MMCR2);
+ val |= mfspr(SPRN_MMCR0);
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ return 0;
+}
+
+static jmp_buf setjmp_env;
+
+static void sigill_handler(int signal)
+{
+ printf("Took sigill\n");
+ longjmp(setjmp_env, 1);
+}
+
+static struct sigaction sigill_action = {
+ .sa_handler = sigill_handler,
+};
+
+int catch_sigill(void (*func)(void))
+{
+ if (sigaction(SIGILL, &sigill_action, NULL)) {
+ perror("sigaction");
+ return 1;
+ }
+
+ if (setjmp(setjmp_env) == 0) {
+ func();
+ return 1;
+ }
+
+ return 0;
+}
+
+void write_pmc1(void)
+{
+ mtspr(SPRN_PMC1, 0);
+}
+
+void write_pmc(int pmc, u64 value)
+{
+ switch (pmc) {
+ case 1: mtspr(SPRN_PMC1, value); break;
+ case 2: mtspr(SPRN_PMC2, value); break;
+ case 3: mtspr(SPRN_PMC3, value); break;
+ case 4: mtspr(SPRN_PMC4, value); break;
+ case 5: mtspr(SPRN_PMC5, value); break;
+ case 6: mtspr(SPRN_PMC6, value); break;
+ }
+}
+
+u64 read_pmc(int pmc)
+{
+ switch (pmc) {
+ case 1: return mfspr(SPRN_PMC1);
+ case 2: return mfspr(SPRN_PMC2);
+ case 3: return mfspr(SPRN_PMC3);
+ case 4: return mfspr(SPRN_PMC4);
+ case 5: return mfspr(SPRN_PMC5);
+ case 6: return mfspr(SPRN_PMC6);
+ }
+
+ return 0;
+}
+
+static void term_handler(int signal)
+{
+ dump_summary_ebb_state();
+ dump_ebb_hw_state();
+ abort();
+}
+
+struct sigaction term_action = {
+ .sa_handler = term_handler,
+};
+
+static void __attribute__((constructor)) ebb_init(void)
+{
+ clear_ebb_stats();
+
+ if (sigaction(SIGTERM, &term_action, NULL))
+ perror("sigaction");
+
+ ebb_state.trace = trace_buffer_allocate(1 * 1024 * 1024);
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.h b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.h
new file mode 100644
index 000000000..e44eee5d9
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef _SELFTESTS_POWERPC_PMU_EBB_EBB_H
+#define _SELFTESTS_POWERPC_PMU_EBB_EBB_H
+
+#include "../event.h"
+#include "../lib.h"
+#include "trace.h"
+#include "reg.h"
+
+#define PMC_INDEX(pmc) ((pmc)-1)
+
+#define NUM_PMC_VALUES 128
+
+struct ebb_state
+{
+ struct {
+ u64 pmc_count[6];
+ volatile int ebb_count;
+ int spurious;
+ int negative;
+ int no_overflow;
+ } stats;
+
+ bool pmc_enable[6];
+ struct trace_buffer *trace;
+};
+
+extern struct ebb_state ebb_state;
+
+#define COUNTER_OVERFLOW 0x80000000ull
+
+static inline uint32_t pmc_sample_period(uint32_t value)
+{
+ return COUNTER_OVERFLOW - value;
+}
+
+static inline void ebb_enable_pmc_counting(int pmc)
+{
+ ebb_state.pmc_enable[PMC_INDEX(pmc)] = true;
+}
+
+bool ebb_check_count(int pmc, u64 sample_period, int fudge);
+void event_leader_ebb_init(struct event *e);
+void event_ebb_init(struct event *e);
+void event_bhrb_init(struct event *e, unsigned ifm);
+void setup_ebb_handler(void (*callee)(void));
+void standard_ebb_callee(void);
+int ebb_event_enable(struct event *e);
+void ebb_global_enable(void);
+void ebb_global_disable(void);
+void ebb_freeze_pmcs(void);
+void ebb_unfreeze_pmcs(void);
+void event_ebb_init(struct event *e);
+void event_leader_ebb_init(struct event *e);
+int count_pmc(int pmc, uint32_t sample_period);
+void dump_ebb_state(void);
+void dump_summary_ebb_state(void);
+void dump_ebb_hw_state(void);
+void clear_ebb_stats(void);
+void write_pmc(int pmc, u64 value);
+u64 read_pmc(int pmc);
+void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask);
+void reset_ebb(void);
+int ebb_check_mmcr0(void);
+
+extern u64 sample_period;
+
+int core_busy_loop(void);
+int ebb_child(union pipe read_pipe, union pipe write_pipe);
+int catch_sigill(void (*func)(void));
+void write_pmc1(void);
+
+#endif /* _SELFTESTS_POWERPC_PMU_EBB_EBB_H */
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_handler.S b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_handler.S
new file mode 100644
index 000000000..14274ea20
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_handler.S
@@ -0,0 +1,365 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <ppc-asm.h>
+#include "reg.h"
+
+
+/* ppc-asm.h defines most of the reg aliases, but not r1/r2. */
+#define r1 1
+#define r2 2
+
+#define RFEBB .long 0x4c000924
+
+/* Stack layout:
+ *
+ * ^
+ * User stack |
+ * Back chain ------+ <- r1 <-------+
+ * ... |
+ * Red zone / ABI Gap |
+ * ... |
+ * vr63 <+ |
+ * vr0 | |
+ * VSCR | |
+ * FSCR | |
+ * r31 | Save area |
+ * r0 | |
+ * XER | |
+ * CTR | |
+ * LR | |
+ * CCR <+ |
+ * ... <+ |
+ * LR | Caller frame |
+ * CCR | |
+ * Back chain <+ <- updated r1 --------+
+ *
+ */
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+#define ABIGAP 512
+#else
+#define ABIGAP 288
+#endif
+
+#define NR_GPR 32
+#define NR_SPR 6
+#define NR_VSR 64
+
+#define SAVE_AREA ((NR_GPR + NR_SPR) * 8 + (NR_VSR * 16))
+#define CALLER_FRAME 112
+
+#define STACK_FRAME (ABIGAP + SAVE_AREA + CALLER_FRAME)
+
+#define CCR_SAVE (CALLER_FRAME)
+#define LR_SAVE (CCR_SAVE + 8)
+#define CTR_SAVE (LR_SAVE + 8)
+#define XER_SAVE (CTR_SAVE + 8)
+#define GPR_SAVE(n) (XER_SAVE + 8 + (8 * n))
+#define FSCR_SAVE (GPR_SAVE(31) + 8)
+#define VSCR_SAVE (FSCR_SAVE + 8)
+#define VSR_SAVE(n) (VSCR_SAVE + 8 + (16 * n))
+
+#define SAVE_GPR(n) std n,GPR_SAVE(n)(r1)
+#define REST_GPR(n) ld n,GPR_SAVE(n)(r1)
+#define TRASH_GPR(n) lis n,0xaaaa
+
+#define SAVE_VSR(n, b) li b, VSR_SAVE(n); stxvd2x n,b,r1
+#define LOAD_VSR(n, b) li b, VSR_SAVE(n); lxvd2x n,b,r1
+
+#define LOAD_REG_IMMEDIATE(reg,expr) \
+ lis reg,(expr)@highest; \
+ ori reg,reg,(expr)@higher; \
+ rldicr reg,reg,32,31; \
+ oris reg,reg,(expr)@h; \
+ ori reg,reg,(expr)@l;
+
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+#define ENTRY_POINT(name) \
+ .type FUNC_NAME(name),@function; \
+ .globl FUNC_NAME(name); \
+ FUNC_NAME(name):
+
+#define RESTORE_TOC(name) \
+ /* Restore our TOC pointer using our entry point */ \
+ LOAD_REG_IMMEDIATE(r12, name) \
+0: addis r2,r12,(.TOC.-0b)@ha; \
+ addi r2,r2,(.TOC.-0b)@l;
+
+#else
+#define ENTRY_POINT(name) FUNC_START(name)
+#define RESTORE_TOC(name) \
+ /* Restore our TOC pointer via our opd entry */ \
+ LOAD_REG_IMMEDIATE(r2, name) \
+ ld r2,8(r2);
+#endif
+
+ .text
+
+ENTRY_POINT(ebb_handler)
+ stdu r1,-STACK_FRAME(r1)
+ SAVE_GPR(0)
+ mflr r0
+ std r0,LR_SAVE(r1)
+ mfcr r0
+ std r0,CCR_SAVE(r1)
+ mfctr r0
+ std r0,CTR_SAVE(r1)
+ mfxer r0
+ std r0,XER_SAVE(r1)
+ SAVE_GPR(2)
+ SAVE_GPR(3)
+ SAVE_GPR(4)
+ SAVE_GPR(5)
+ SAVE_GPR(6)
+ SAVE_GPR(7)
+ SAVE_GPR(8)
+ SAVE_GPR(9)
+ SAVE_GPR(10)
+ SAVE_GPR(11)
+ SAVE_GPR(12)
+ SAVE_GPR(13)
+ SAVE_GPR(14)
+ SAVE_GPR(15)
+ SAVE_GPR(16)
+ SAVE_GPR(17)
+ SAVE_GPR(18)
+ SAVE_GPR(19)
+ SAVE_GPR(20)
+ SAVE_GPR(21)
+ SAVE_GPR(22)
+ SAVE_GPR(23)
+ SAVE_GPR(24)
+ SAVE_GPR(25)
+ SAVE_GPR(26)
+ SAVE_GPR(27)
+ SAVE_GPR(28)
+ SAVE_GPR(29)
+ SAVE_GPR(30)
+ SAVE_GPR(31)
+ SAVE_VSR(0, r3)
+ mffs f0
+ stfd f0, FSCR_SAVE(r1)
+ mfvscr f0
+ stfd f0, VSCR_SAVE(r1)
+ SAVE_VSR(1, r3)
+ SAVE_VSR(2, r3)
+ SAVE_VSR(3, r3)
+ SAVE_VSR(4, r3)
+ SAVE_VSR(5, r3)
+ SAVE_VSR(6, r3)
+ SAVE_VSR(7, r3)
+ SAVE_VSR(8, r3)
+ SAVE_VSR(9, r3)
+ SAVE_VSR(10, r3)
+ SAVE_VSR(11, r3)
+ SAVE_VSR(12, r3)
+ SAVE_VSR(13, r3)
+ SAVE_VSR(14, r3)
+ SAVE_VSR(15, r3)
+ SAVE_VSR(16, r3)
+ SAVE_VSR(17, r3)
+ SAVE_VSR(18, r3)
+ SAVE_VSR(19, r3)
+ SAVE_VSR(20, r3)
+ SAVE_VSR(21, r3)
+ SAVE_VSR(22, r3)
+ SAVE_VSR(23, r3)
+ SAVE_VSR(24, r3)
+ SAVE_VSR(25, r3)
+ SAVE_VSR(26, r3)
+ SAVE_VSR(27, r3)
+ SAVE_VSR(28, r3)
+ SAVE_VSR(29, r3)
+ SAVE_VSR(30, r3)
+ SAVE_VSR(31, r3)
+ SAVE_VSR(32, r3)
+ SAVE_VSR(33, r3)
+ SAVE_VSR(34, r3)
+ SAVE_VSR(35, r3)
+ SAVE_VSR(36, r3)
+ SAVE_VSR(37, r3)
+ SAVE_VSR(38, r3)
+ SAVE_VSR(39, r3)
+ SAVE_VSR(40, r3)
+ SAVE_VSR(41, r3)
+ SAVE_VSR(42, r3)
+ SAVE_VSR(43, r3)
+ SAVE_VSR(44, r3)
+ SAVE_VSR(45, r3)
+ SAVE_VSR(46, r3)
+ SAVE_VSR(47, r3)
+ SAVE_VSR(48, r3)
+ SAVE_VSR(49, r3)
+ SAVE_VSR(50, r3)
+ SAVE_VSR(51, r3)
+ SAVE_VSR(52, r3)
+ SAVE_VSR(53, r3)
+ SAVE_VSR(54, r3)
+ SAVE_VSR(55, r3)
+ SAVE_VSR(56, r3)
+ SAVE_VSR(57, r3)
+ SAVE_VSR(58, r3)
+ SAVE_VSR(59, r3)
+ SAVE_VSR(60, r3)
+ SAVE_VSR(61, r3)
+ SAVE_VSR(62, r3)
+ SAVE_VSR(63, r3)
+
+ TRASH_GPR(2)
+ TRASH_GPR(3)
+ TRASH_GPR(4)
+ TRASH_GPR(5)
+ TRASH_GPR(6)
+ TRASH_GPR(7)
+ TRASH_GPR(8)
+ TRASH_GPR(9)
+ TRASH_GPR(10)
+ TRASH_GPR(11)
+ TRASH_GPR(12)
+ TRASH_GPR(14)
+ TRASH_GPR(15)
+ TRASH_GPR(16)
+ TRASH_GPR(17)
+ TRASH_GPR(18)
+ TRASH_GPR(19)
+ TRASH_GPR(20)
+ TRASH_GPR(21)
+ TRASH_GPR(22)
+ TRASH_GPR(23)
+ TRASH_GPR(24)
+ TRASH_GPR(25)
+ TRASH_GPR(26)
+ TRASH_GPR(27)
+ TRASH_GPR(28)
+ TRASH_GPR(29)
+ TRASH_GPR(30)
+ TRASH_GPR(31)
+
+ RESTORE_TOC(ebb_handler)
+
+ /*
+ * r13 is our TLS pointer. We leave whatever value was in there when the
+ * EBB fired. That seems to be OK because once set the TLS pointer is not
+ * changed - but presumably that could change in future.
+ */
+
+ bl ebb_hook
+ nop
+
+ /* r2 may be changed here but we don't care */
+
+ lfd f0, FSCR_SAVE(r1)
+ mtfsf 0xff,f0
+ lfd f0, VSCR_SAVE(r1)
+ mtvscr f0
+ LOAD_VSR(0, r3)
+ LOAD_VSR(1, r3)
+ LOAD_VSR(2, r3)
+ LOAD_VSR(3, r3)
+ LOAD_VSR(4, r3)
+ LOAD_VSR(5, r3)
+ LOAD_VSR(6, r3)
+ LOAD_VSR(7, r3)
+ LOAD_VSR(8, r3)
+ LOAD_VSR(9, r3)
+ LOAD_VSR(10, r3)
+ LOAD_VSR(11, r3)
+ LOAD_VSR(12, r3)
+ LOAD_VSR(13, r3)
+ LOAD_VSR(14, r3)
+ LOAD_VSR(15, r3)
+ LOAD_VSR(16, r3)
+ LOAD_VSR(17, r3)
+ LOAD_VSR(18, r3)
+ LOAD_VSR(19, r3)
+ LOAD_VSR(20, r3)
+ LOAD_VSR(21, r3)
+ LOAD_VSR(22, r3)
+ LOAD_VSR(23, r3)
+ LOAD_VSR(24, r3)
+ LOAD_VSR(25, r3)
+ LOAD_VSR(26, r3)
+ LOAD_VSR(27, r3)
+ LOAD_VSR(28, r3)
+ LOAD_VSR(29, r3)
+ LOAD_VSR(30, r3)
+ LOAD_VSR(31, r3)
+ LOAD_VSR(32, r3)
+ LOAD_VSR(33, r3)
+ LOAD_VSR(34, r3)
+ LOAD_VSR(35, r3)
+ LOAD_VSR(36, r3)
+ LOAD_VSR(37, r3)
+ LOAD_VSR(38, r3)
+ LOAD_VSR(39, r3)
+ LOAD_VSR(40, r3)
+ LOAD_VSR(41, r3)
+ LOAD_VSR(42, r3)
+ LOAD_VSR(43, r3)
+ LOAD_VSR(44, r3)
+ LOAD_VSR(45, r3)
+ LOAD_VSR(46, r3)
+ LOAD_VSR(47, r3)
+ LOAD_VSR(48, r3)
+ LOAD_VSR(49, r3)
+ LOAD_VSR(50, r3)
+ LOAD_VSR(51, r3)
+ LOAD_VSR(52, r3)
+ LOAD_VSR(53, r3)
+ LOAD_VSR(54, r3)
+ LOAD_VSR(55, r3)
+ LOAD_VSR(56, r3)
+ LOAD_VSR(57, r3)
+ LOAD_VSR(58, r3)
+ LOAD_VSR(59, r3)
+ LOAD_VSR(60, r3)
+ LOAD_VSR(61, r3)
+ LOAD_VSR(62, r3)
+ LOAD_VSR(63, r3)
+
+ ld r0,XER_SAVE(r1)
+ mtxer r0
+ ld r0,CTR_SAVE(r1)
+ mtctr r0
+ ld r0,LR_SAVE(r1)
+ mtlr r0
+ ld r0,CCR_SAVE(r1)
+ mtcr r0
+ REST_GPR(0)
+ REST_GPR(2)
+ REST_GPR(3)
+ REST_GPR(4)
+ REST_GPR(5)
+ REST_GPR(6)
+ REST_GPR(7)
+ REST_GPR(8)
+ REST_GPR(9)
+ REST_GPR(10)
+ REST_GPR(11)
+ REST_GPR(12)
+ REST_GPR(13)
+ REST_GPR(14)
+ REST_GPR(15)
+ REST_GPR(16)
+ REST_GPR(17)
+ REST_GPR(18)
+ REST_GPR(19)
+ REST_GPR(20)
+ REST_GPR(21)
+ REST_GPR(22)
+ REST_GPR(23)
+ REST_GPR(24)
+ REST_GPR(25)
+ REST_GPR(26)
+ REST_GPR(27)
+ REST_GPR(28)
+ REST_GPR(29)
+ REST_GPR(30)
+ REST_GPR(31)
+ addi r1,r1,STACK_FRAME
+ RFEBB
+FUNC_END(ebb_handler)
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_child_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_child_test.c
new file mode 100644
index 000000000..c45f94814
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_child_test.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests we can setup an EBB on our child. Nothing interesting happens, because
+ * even though the event is enabled and running the child hasn't enabled the
+ * actual delivery of the EBBs.
+ */
+
+static int victim_child(union pipe read_pipe, union pipe write_pipe)
+{
+ int i;
+
+ FAIL_IF(wait_for_parent(read_pipe));
+ FAIL_IF(notify_parent(write_pipe));
+
+ /* Parent creates EBB event */
+
+ FAIL_IF(wait_for_parent(read_pipe));
+ FAIL_IF(notify_parent(write_pipe));
+
+ /* Check the EBB is enabled by writing PMC1 */
+ write_pmc1();
+
+ /* EBB event is enabled here */
+ for (i = 0; i < 1000000; i++) ;
+
+ return 0;
+}
+
+int ebb_on_child(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ pid_t pid;
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(victim_child(write_pipe, read_pipe));
+ }
+
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+ /* Child is running now */
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open_with_pid(&event, pid));
+ FAIL_IF(ebb_event_enable(&event));
+
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+ /* Child should just exit happily */
+ FAIL_IF(wait_for_child(pid));
+
+ event_close(&event);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(ebb_on_child, "ebb_on_child");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
new file mode 100644
index 000000000..11acf1d55
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests we can setup an EBB on our child. The child expects this and enables
+ * EBBs, which are then delivered to the child, even though the event is
+ * created by the parent.
+ */
+
+static int victim_child(union pipe read_pipe, union pipe write_pipe)
+{
+ FAIL_IF(wait_for_parent(read_pipe));
+
+ /* Setup our EBB handler, before the EBB event is created */
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(notify_parent(write_pipe));
+
+ while (ebb_state.stats.ebb_count < 20) {
+ FAIL_IF(core_busy_loop());
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ return 0;
+}
+
+/* Tests we can setup an EBB on our child - if it's expecting it */
+int ebb_on_willing_child(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ pid_t pid;
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(victim_child(write_pipe, read_pipe));
+ }
+
+ /* Signal the child to setup its EBB handler */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+ /* Child is running now */
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open_with_pid(&event, pid));
+ FAIL_IF(ebb_event_enable(&event));
+
+ /* Child show now take EBBs and then exit */
+ FAIL_IF(wait_for_child(pid));
+
+ event_close(&event);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(ebb_on_willing_child, "ebb_on_willing_child");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_vs_cpu_event_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_vs_cpu_event_test.c
new file mode 100644
index 000000000..be4dd5a4e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb_vs_cpu_event_test.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests an EBB vs a cpu event - in that order. The EBB should force the cpu
+ * event off the PMU.
+ */
+
+static int setup_cpu_event(struct event *event, int cpu)
+{
+ event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
+
+ event->attr.exclude_kernel = 1;
+ event->attr.exclude_hv = 1;
+ event->attr.exclude_idle = 1;
+
+ SKIP_IF(require_paranoia_below(1));
+ FAIL_IF(event_open_with_cpu(event, cpu));
+ FAIL_IF(event_enable(event));
+
+ return 0;
+}
+
+int ebb_vs_cpu_event(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ int cpu, rc;
+ pid_t pid;
+
+ cpu = pick_online_cpu();
+ FAIL_IF(cpu < 0);
+ FAIL_IF(bind_to_cpu(cpu));
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(ebb_child(write_pipe, read_pipe));
+ }
+
+ /* Signal the child to install its EBB event and wait */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+ /* Now try to install our CPU event */
+ rc = setup_cpu_event(&event, cpu);
+ if (rc) {
+ kill_child_and_wait(pid);
+ return rc;
+ }
+
+ /* Signal the child to run */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+ /* .. and wait for it to complete */
+ FAIL_IF(wait_for_child(pid));
+ FAIL_IF(event_disable(&event));
+ FAIL_IF(event_read(&event));
+
+ event_report(&event);
+
+ /* The cpu event may have run, but we don't expect 100% */
+ FAIL_IF(event.result.enabled >= event.result.running);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(ebb_vs_cpu_event, "ebb_vs_cpu_event");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/event_attributes_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/event_attributes_test.c
new file mode 100644
index 000000000..7e78153f0
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/event_attributes_test.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test various attributes of the EBB event are enforced.
+ */
+int event_attributes(void)
+{
+ struct event event, leader;
+
+ event_init(&event, 0x1001e);
+ event_leader_ebb_init(&event);
+ /* Expected to succeed */
+ FAIL_IF(event_open(&event));
+ event_close(&event);
+
+
+ event_init(&event, 0x001e); /* CYCLES - no PMC specified */
+ event_leader_ebb_init(&event);
+ /* Expected to fail, no PMC specified */
+ FAIL_IF(event_open(&event) == 0);
+
+
+ event_init(&event, 0x2001e);
+ event_leader_ebb_init(&event);
+ event.attr.exclusive = 0;
+ /* Expected to fail, not exclusive */
+ FAIL_IF(event_open(&event) == 0);
+
+
+ event_init(&event, 0x3001e);
+ event_leader_ebb_init(&event);
+ event.attr.freq = 1;
+ /* Expected to fail, sets freq */
+ FAIL_IF(event_open(&event) == 0);
+
+
+ event_init(&event, 0x4001e);
+ event_leader_ebb_init(&event);
+ event.attr.sample_period = 1;
+ /* Expected to fail, sets sample_period */
+ FAIL_IF(event_open(&event) == 0);
+
+
+ event_init(&event, 0x1001e);
+ event_leader_ebb_init(&event);
+ event.attr.enable_on_exec = 1;
+ /* Expected to fail, sets enable_on_exec */
+ FAIL_IF(event_open(&event) == 0);
+
+
+ event_init(&event, 0x1001e);
+ event_leader_ebb_init(&event);
+ event.attr.inherit = 1;
+ /* Expected to fail, sets inherit */
+ FAIL_IF(event_open(&event) == 0);
+
+
+ event_init(&leader, 0x1001e);
+ event_leader_ebb_init(&leader);
+ FAIL_IF(event_open(&leader));
+
+ event_init(&event, 0x20002);
+ event_ebb_init(&event);
+
+ /* Expected to succeed */
+ FAIL_IF(event_open_with_group(&event, leader.fd));
+ event_close(&leader);
+ event_close(&event);
+
+
+ event_init(&leader, 0x1001e);
+ event_leader_ebb_init(&leader);
+ FAIL_IF(event_open(&leader));
+
+ event_init(&event, 0x20002);
+
+ /* Expected to fail, event doesn't request EBB, leader does */
+ FAIL_IF(event_open_with_group(&event, leader.fd) == 0);
+ event_close(&leader);
+
+
+ event_init(&leader, 0x1001e);
+ event_leader_ebb_init(&leader);
+ /* Clear the EBB flag */
+ leader.attr.config &= ~(1ull << 63);
+
+ FAIL_IF(event_open(&leader));
+
+ event_init(&event, 0x20002);
+ event_ebb_init(&event);
+
+ /* Expected to fail, leader doesn't request EBB */
+ FAIL_IF(event_open_with_group(&event, leader.fd) == 0);
+ event_close(&leader);
+
+
+ event_init(&leader, 0x1001e);
+ event_leader_ebb_init(&leader);
+ leader.attr.exclusive = 0;
+ /* Expected to fail, leader isn't exclusive */
+ FAIL_IF(event_open(&leader) == 0);
+
+
+ event_init(&leader, 0x1001e);
+ event_leader_ebb_init(&leader);
+ leader.attr.pinned = 0;
+ /* Expected to fail, leader isn't pinned */
+ FAIL_IF(event_open(&leader) == 0);
+
+ event_init(&event, 0x1001e);
+ event_leader_ebb_init(&event);
+ /* Expected to fail, not a task event */
+ SKIP_IF(require_paranoia_below(1));
+ FAIL_IF(event_open_with_cpu(&event, 0) == 0);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(event_attributes, "event_attributes");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S b/kernel/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S
new file mode 100644
index 000000000..b866a0581
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/fixed_instruction_loop.S
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <ppc-asm.h>
+
+ .text
+
+FUNC_START(thirty_two_instruction_loop)
+ cmpwi r3,0
+ beqlr
+ addi r4,r3,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1 # 28 addi's
+ subi r3,r3,1
+ b FUNC_NAME(thirty_two_instruction_loop)
+FUNC_END(thirty_two_instruction_loop)
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/fork_cleanup_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/fork_cleanup_test.c
new file mode 100644
index 000000000..9e7af6e76
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/fork_cleanup_test.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test that a fork clears the PMU state of the child. eg. BESCR/EBBHR/EBBRR
+ * are cleared, and MMCR0_PMCC is reset, preventing the child from accessing
+ * the PMU.
+ */
+
+static struct event event;
+
+static int child(void)
+{
+ /* Even though we have EBE=0 we can still see the EBB regs */
+ FAIL_IF(mfspr(SPRN_BESCR) != 0);
+ FAIL_IF(mfspr(SPRN_EBBHR) != 0);
+ FAIL_IF(mfspr(SPRN_EBBRR) != 0);
+
+ FAIL_IF(catch_sigill(write_pmc1));
+
+ /* We can still read from the event, though it is on our parent */
+ FAIL_IF(event_read(&event));
+
+ return 0;
+}
+
+/* Tests that fork clears EBB state */
+int fork_cleanup(void)
+{
+ pid_t pid;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_MMCR0, MMCR0_FC);
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ /* Don't need to actually take any EBBs */
+
+ pid = fork();
+ if (pid == 0)
+ exit(child());
+
+ /* Child does the actual testing */
+ FAIL_IF(wait_for_child(pid));
+
+ /* After fork */
+ event_close(&event);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(fork_cleanup, "fork_cleanup");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/instruction_count_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/instruction_count_test.c
new file mode 100644
index 000000000..f8190fa29
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/instruction_count_test.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sys/prctl.h>
+
+#include "ebb.h"
+
+
+/*
+ * Run a calibrated instruction loop and count instructions executed using
+ * EBBs. Make sure the counts look right.
+ */
+
+extern void thirty_two_instruction_loop(uint64_t loops);
+
+static bool counters_frozen = true;
+
+static int do_count_loop(struct event *event, uint64_t instructions,
+ uint64_t overhead, bool report)
+{
+ int64_t difference, expected;
+ double percentage;
+
+ clear_ebb_stats();
+
+ counters_frozen = false;
+ mb();
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_FC);
+
+ thirty_two_instruction_loop(instructions >> 5);
+
+ counters_frozen = true;
+ mb();
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) | MMCR0_FC);
+
+ count_pmc(4, sample_period);
+
+ event->result.value = ebb_state.stats.pmc_count[4-1];
+ expected = instructions + overhead;
+ difference = event->result.value - expected;
+ percentage = (double)difference / event->result.value * 100;
+
+ if (report) {
+ printf("Looped for %lu instructions, overhead %lu\n", instructions, overhead);
+ printf("Expected %lu\n", expected);
+ printf("Actual %llu\n", event->result.value);
+ printf("Error %ld, %f%%\n", difference, percentage);
+ printf("Took %d EBBs\n", ebb_state.stats.ebb_count);
+ }
+
+ if (difference < 0)
+ difference = -difference;
+
+ /* Tolerate a difference of up to 0.0001 % */
+ difference *= 10000 * 100;
+ if (difference / event->result.value)
+ return -1;
+
+ return 0;
+}
+
+/* Count how many instructions it takes to do a null loop */
+static uint64_t determine_overhead(struct event *event)
+{
+ uint64_t current, overhead;
+ int i;
+
+ do_count_loop(event, 0, 0, false);
+ overhead = event->result.value;
+
+ for (i = 0; i < 100; i++) {
+ do_count_loop(event, 0, 0, false);
+ current = event->result.value;
+ if (current < overhead) {
+ printf("Replacing overhead %lu with %lu\n", overhead, current);
+ overhead = current;
+ }
+ }
+
+ return overhead;
+}
+
+static void pmc4_ebb_callee(void)
+{
+ uint64_t val;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO)) {
+ ebb_state.stats.spurious++;
+ goto out;
+ }
+
+ ebb_state.stats.ebb_count++;
+ count_pmc(4, sample_period);
+out:
+ if (counters_frozen)
+ reset_ebb_with_clear_mask(MMCR0_PMAO);
+ else
+ reset_ebb();
+}
+
+int instruction_count(void)
+{
+ struct event event;
+ uint64_t overhead;
+
+ event_init_named(&event, 0x400FA, "PM_RUN_INST_CMPL");
+ event_leader_ebb_init(&event);
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+ FAIL_IF(ebb_event_enable(&event));
+
+ sample_period = COUNTER_OVERFLOW;
+
+ setup_ebb_handler(pmc4_ebb_callee);
+ mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_FC);
+ ebb_global_enable();
+
+ overhead = determine_overhead(&event);
+ printf("Overhead of null loop: %lu instructions\n", overhead);
+
+ /* Run for 1M instructions */
+ FAIL_IF(do_count_loop(&event, 0x100000, overhead, true));
+
+ /* Run for 10M instructions */
+ FAIL_IF(do_count_loop(&event, 0xa00000, overhead, true));
+
+ /* Run for 100M instructions */
+ FAIL_IF(do_count_loop(&event, 0x6400000, overhead, true));
+
+ /* Run for 1G instructions */
+ FAIL_IF(do_count_loop(&event, 0x40000000, overhead, true));
+
+ /* Run for 16G instructions */
+ FAIL_IF(do_count_loop(&event, 0x400000000, overhead, true));
+
+ /* Run for 64G instructions */
+ FAIL_IF(do_count_loop(&event, 0x1000000000, overhead, true));
+
+ /* Run for 128G instructions */
+ FAIL_IF(do_count_loop(&event, 0x2000000000, overhead, true));
+
+ ebb_global_disable();
+ event_close(&event);
+
+ printf("Finished OK\n");
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(instruction_count, "instruction_count");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
new file mode 100644
index 000000000..0c9dd9b2e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test that tries to trigger CPU_FTR_PMAO_BUG. Which is a hardware defect
+ * where an exception triggers but we context switch before it is delivered and
+ * lose the exception.
+ */
+
+static int test_body(void)
+{
+ int i, orig_period, max_period;
+ struct event event;
+
+ /* We use PMC4 to make sure the kernel switches all counters correctly */
+ event_init_named(&event, 0x40002, "instructions");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(4);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+ FAIL_IF(ebb_event_enable(&event));
+
+ /*
+ * We want a low sample period, but we also want to get out of the EBB
+ * handler without tripping up again.
+ *
+ * This value picked after much experimentation.
+ */
+ orig_period = max_period = sample_period = 400;
+
+ mtspr(SPRN_PMC4, pmc_sample_period(sample_period));
+
+ while (ebb_state.stats.ebb_count < 1000000) {
+ /*
+ * We are trying to get the EBB exception to race exactly with
+ * us entering the kernel to do the syscall. We then need the
+ * kernel to decide our timeslice is up and context switch to
+ * the other thread. When we come back our EBB will have been
+ * lost and we'll spin in this while loop forever.
+ */
+
+ for (i = 0; i < 100000; i++)
+ sched_yield();
+
+ /* Change the sample period slightly to try and hit the race */
+ if (sample_period >= (orig_period + 200))
+ sample_period = orig_period;
+ else
+ sample_period++;
+
+ if (sample_period > max_period)
+ max_period = sample_period;
+ }
+
+ ebb_freeze_pmcs();
+ ebb_global_disable();
+
+ count_pmc(4, sample_period);
+ mtspr(SPRN_PMC4, 0xdead);
+
+ dump_summary_ebb_state();
+ dump_ebb_hw_state();
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ /* We vary our sample period so we need extra fudge here */
+ FAIL_IF(!ebb_check_count(4, orig_period, 2 * (max_period - orig_period)));
+
+ return 0;
+}
+
+static int lost_exception(void)
+{
+ return eat_cpu(test_body);
+}
+
+int main(void)
+{
+ return test_harness(lost_exception, "lost_exception");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
new file mode 100644
index 000000000..67d78af32
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test counting multiple events using EBBs.
+ */
+int multi_counter(void)
+{
+ struct event events[6];
+ int i, group_fd;
+
+ event_init_named(&events[0], 0x1001C, "PM_CMPLU_STALL_THRD");
+ event_init_named(&events[1], 0x2D016, "PM_CMPLU_STALL_FXU");
+ event_init_named(&events[2], 0x30006, "PM_CMPLU_STALL_OTHER_CMPL");
+ event_init_named(&events[3], 0x4000A, "PM_CMPLU_STALL");
+ event_init_named(&events[4], 0x600f4, "PM_RUN_CYC");
+ event_init_named(&events[5], 0x500fa, "PM_RUN_INST_CMPL");
+
+ event_leader_ebb_init(&events[0]);
+ for (i = 1; i < 6; i++)
+ event_ebb_init(&events[i]);
+
+ group_fd = -1;
+ for (i = 0; i < 6; i++) {
+ events[i].attr.exclude_kernel = 1;
+ events[i].attr.exclude_hv = 1;
+ events[i].attr.exclude_idle = 1;
+
+ FAIL_IF(event_open_with_group(&events[i], group_fd));
+ if (group_fd == -1)
+ group_fd = events[0].fd;
+ }
+
+ ebb_enable_pmc_counting(1);
+ ebb_enable_pmc_counting(2);
+ ebb_enable_pmc_counting(3);
+ ebb_enable_pmc_counting(4);
+ ebb_enable_pmc_counting(5);
+ ebb_enable_pmc_counting(6);
+ setup_ebb_handler(standard_ebb_callee);
+
+ FAIL_IF(ioctl(events[0].fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP));
+ FAIL_IF(event_read(&events[0]));
+
+ ebb_global_enable();
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+ mtspr(SPRN_PMC2, pmc_sample_period(sample_period));
+ mtspr(SPRN_PMC3, pmc_sample_period(sample_period));
+ mtspr(SPRN_PMC4, pmc_sample_period(sample_period));
+ mtspr(SPRN_PMC5, pmc_sample_period(sample_period));
+ mtspr(SPRN_PMC6, pmc_sample_period(sample_period));
+
+ while (ebb_state.stats.ebb_count < 50) {
+ FAIL_IF(core_busy_loop());
+ FAIL_IF(ebb_check_mmcr0());
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+ count_pmc(2, sample_period);
+ count_pmc(3, sample_period);
+ count_pmc(4, sample_period);
+ count_pmc(5, sample_period);
+ count_pmc(6, sample_period);
+
+ dump_ebb_state();
+
+ for (i = 0; i < 6; i++)
+ event_close(&events[i]);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(multi_counter, "multi_counter");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
new file mode 100644
index 000000000..b8dc371f9
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test running multiple EBB using processes at once on a single CPU. They
+ * should all run happily without interfering with each other.
+ */
+
+static bool child_should_exit;
+
+static void sigint_handler(int signal)
+{
+ child_should_exit = true;
+}
+
+struct sigaction sigint_action = {
+ .sa_handler = sigint_handler,
+};
+
+static int cycles_child(void)
+{
+ struct event event;
+
+ if (sigaction(SIGINT, &sigint_action, NULL)) {
+ perror("sigaction");
+ return 1;
+ }
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ ebb_enable_pmc_counting(1);
+ setup_ebb_handler(standard_ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ while (!child_should_exit) {
+ FAIL_IF(core_busy_loop());
+ FAIL_IF(ebb_check_mmcr0());
+ }
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_summary_ebb_state();
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+
+ return 0;
+}
+
+#define NR_CHILDREN 4
+
+int multi_ebb_procs(void)
+{
+ pid_t pids[NR_CHILDREN];
+ int cpu, rc, i;
+
+ cpu = pick_online_cpu();
+ FAIL_IF(cpu < 0);
+ FAIL_IF(bind_to_cpu(cpu));
+
+ for (i = 0; i < NR_CHILDREN; i++) {
+ pids[i] = fork();
+ if (pids[i] == 0)
+ exit(cycles_child());
+ }
+
+ /* Have them all run for "a while" */
+ sleep(10);
+
+ rc = 0;
+ for (i = 0; i < NR_CHILDREN; i++) {
+ /* Tell them to stop */
+ kill(pids[i], SIGINT);
+ /* And wait */
+ rc |= wait_for_child(pids[i]);
+ }
+
+ return rc;
+}
+
+int main(void)
+{
+ return test_harness(multi_ebb_procs, "multi_ebb_procs");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c
new file mode 100644
index 000000000..2f9bf8edf
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#include "ebb.h"
+
+
+/* Test that things work sanely if we have no handler */
+
+static int no_handler_test(void)
+{
+ struct event event;
+ u64 val;
+ int i;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+ FAIL_IF(ebb_event_enable(&event));
+
+ val = mfspr(SPRN_EBBHR);
+ FAIL_IF(val != 0);
+
+ /* Make sure it overflows quickly */
+ sample_period = 1000;
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ /* Spin to make sure the event has time to overflow */
+ for (i = 0; i < 1000; i++)
+ mb();
+
+ dump_ebb_state();
+
+ /* We expect to see the PMU frozen & PMAO set */
+ val = mfspr(SPRN_MMCR0);
+ FAIL_IF(val != 0x0000000080000080);
+
+ event_close(&event);
+
+ dump_ebb_state();
+
+ /* The real test is that we never took an EBB at 0x0 */
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(no_handler_test,"no_handler_test");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
new file mode 100644
index 000000000..986500fd2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <sched.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test that the kernel properly handles PMAE across context switches.
+ *
+ * We test this by calling into the kernel inside our EBB handler, where PMAE
+ * is clear. A cpu eater companion thread is running on the same CPU as us to
+ * encourage the scheduler to switch us.
+ *
+ * The kernel must make sure that when it context switches us back in, it
+ * honours the fact that we had PMAE clear.
+ *
+ * Observed to hit the failing case on the first EBB with a broken kernel.
+ */
+
+static bool mmcr0_mismatch;
+static uint64_t before, after;
+
+static void syscall_ebb_callee(void)
+{
+ uint64_t val;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO)) {
+ ebb_state.stats.spurious++;
+ goto out;
+ }
+
+ ebb_state.stats.ebb_count++;
+ count_pmc(1, sample_period);
+
+ before = mfspr(SPRN_MMCR0);
+
+ /* Try and get ourselves scheduled, to force a PMU context switch */
+ sched_yield();
+
+ after = mfspr(SPRN_MMCR0);
+ if (before != after)
+ mmcr0_mismatch = true;
+
+out:
+ reset_ebb();
+}
+
+static int test_body(void)
+{
+ struct event event;
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ setup_ebb_handler(syscall_ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+ while (ebb_state.stats.ebb_count < 20 && !mmcr0_mismatch)
+ FAIL_IF(core_busy_loop());
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(1, sample_period);
+
+ dump_ebb_state();
+
+ if (mmcr0_mismatch)
+ printf("Saw MMCR0 before 0x%lx after 0x%lx\n", before, after);
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0);
+ FAIL_IF(mmcr0_mismatch);
+
+ return 0;
+}
+
+int pmae_handling(void)
+{
+ return eat_cpu(test_body);
+}
+
+int main(void)
+{
+ return test_harness(pmae_handling, "pmae_handling");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
new file mode 100644
index 000000000..a503fa70c
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+
+
+/*
+ * Test that PMC5 & 6 are frozen (ie. don't overflow) when they are not being
+ * used. Tests the MMCR0_FC56 logic in the kernel.
+ */
+
+static int pmc56_overflowed;
+
+static void ebb_callee(void)
+{
+ uint64_t val;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO)) {
+ ebb_state.stats.spurious++;
+ goto out;
+ }
+
+ ebb_state.stats.ebb_count++;
+ count_pmc(2, sample_period);
+
+ val = mfspr(SPRN_PMC5);
+ if (val >= COUNTER_OVERFLOW)
+ pmc56_overflowed++;
+
+ count_pmc(5, COUNTER_OVERFLOW);
+
+ val = mfspr(SPRN_PMC6);
+ if (val >= COUNTER_OVERFLOW)
+ pmc56_overflowed++;
+
+ count_pmc(6, COUNTER_OVERFLOW);
+
+out:
+ reset_ebb();
+}
+
+int pmc56_overflow(void)
+{
+ struct event event;
+
+ /* Use PMC2 so we set PMCjCE, which enables PMC5/6 */
+ event_init(&event, 0x2001e);
+ event_leader_ebb_init(&event);
+
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ FAIL_IF(event_open(&event));
+
+ setup_ebb_handler(ebb_callee);
+ ebb_global_enable();
+
+ FAIL_IF(ebb_event_enable(&event));
+
+ mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+ mtspr(SPRN_PMC5, 0);
+ mtspr(SPRN_PMC6, 0);
+
+ while (ebb_state.stats.ebb_count < 10)
+ FAIL_IF(core_busy_loop());
+
+ ebb_global_disable();
+ ebb_freeze_pmcs();
+
+ count_pmc(2, sample_period);
+
+ dump_ebb_state();
+
+ printf("PMC5/6 overflow %d\n", pmc56_overflowed);
+
+ event_close(&event);
+
+ FAIL_IF(ebb_state.stats.ebb_count == 0 || pmc56_overflowed != 0);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(pmc56_overflow, "pmc56_overflow");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/reg.h b/kernel/tools/testing/selftests/powerpc/pmu/ebb/reg.h
new file mode 100644
index 000000000..5921b0dfe
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/reg.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef _SELFTESTS_POWERPC_REG_H
+#define _SELFTESTS_POWERPC_REG_H
+
+#define __stringify_1(x) #x
+#define __stringify(x) __stringify_1(x)
+
+#define mfspr(rn) ({unsigned long rval; \
+ asm volatile("mfspr %0," __stringify(rn) \
+ : "=r" (rval)); rval; })
+#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : \
+ : "r" ((unsigned long)(v)) \
+ : "memory")
+
+#define mb() asm volatile("sync" : : : "memory");
+
+#define SPRN_MMCR2 769
+#define SPRN_MMCRA 770
+#define SPRN_MMCR0 779
+#define MMCR0_PMAO 0x00000080
+#define MMCR0_PMAE 0x04000000
+#define MMCR0_FC 0x80000000
+#define SPRN_EBBHR 804
+#define SPRN_EBBRR 805
+#define SPRN_BESCR 806 /* Branch event status & control register */
+#define SPRN_BESCRS 800 /* Branch event status & control set (1 bits set to 1) */
+#define SPRN_BESCRSU 801 /* Branch event status & control set upper */
+#define SPRN_BESCRR 802 /* Branch event status & control REset (1 bits set to 0) */
+#define SPRN_BESCRRU 803 /* Branch event status & control REset upper */
+
+#define BESCR_PMEO 0x1 /* PMU Event-based exception Occurred */
+#define BESCR_PME (0x1ul << 32) /* PMU Event-based exception Enable */
+
+#define SPRN_PMC1 771
+#define SPRN_PMC2 772
+#define SPRN_PMC3 773
+#define SPRN_PMC4 774
+#define SPRN_PMC5 775
+#define SPRN_PMC6 776
+
+#define SPRN_SIAR 780
+#define SPRN_SDAR 781
+#define SPRN_SIER 768
+
+#endif /* _SELFTESTS_POWERPC_REG_H */
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c
new file mode 100644
index 000000000..0cae66f65
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+#include "reg.h"
+
+
+/*
+ * Test basic access to the EBB regs, they should be user accessible with no
+ * kernel interaction required.
+ */
+int reg_access(void)
+{
+ uint64_t val, expected;
+
+ expected = 0x8000000100000000ull;
+ mtspr(SPRN_BESCR, expected);
+ val = mfspr(SPRN_BESCR);
+
+ FAIL_IF(val != expected);
+
+ expected = 0x0000000001000000ull;
+ mtspr(SPRN_EBBHR, expected);
+ val = mfspr(SPRN_EBBHR);
+
+ FAIL_IF(val != expected);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(reg_access, "reg_access");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_pinned_vs_ebb_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_pinned_vs_ebb_test.c
new file mode 100644
index 000000000..d56607e4f
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_pinned_vs_ebb_test.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests a pinned per-task event vs an EBB - in that order. The pinned per-task
+ * event should prevent the EBB event from being enabled.
+ */
+
+static int setup_child_event(struct event *event, pid_t child_pid)
+{
+ event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
+
+ event->attr.pinned = 1;
+
+ event->attr.exclude_kernel = 1;
+ event->attr.exclude_hv = 1;
+ event->attr.exclude_idle = 1;
+
+ FAIL_IF(event_open_with_pid(event, child_pid));
+ FAIL_IF(event_enable(event));
+
+ return 0;
+}
+
+int task_event_pinned_vs_ebb(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ pid_t pid;
+ int rc;
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(ebb_child(write_pipe, read_pipe));
+ }
+
+ /* We setup the task event first */
+ rc = setup_child_event(&event, pid);
+ if (rc) {
+ kill_child_and_wait(pid);
+ return rc;
+ }
+
+ /* Signal the child to install its EBB event and wait */
+ if (sync_with_child(read_pipe, write_pipe))
+ /* If it fails, wait for it to exit */
+ goto wait;
+
+ /* Signal the child to run */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+wait:
+ /* We expect it to fail to read the event */
+ FAIL_IF(wait_for_child(pid) != 2);
+ FAIL_IF(event_disable(&event));
+ FAIL_IF(event_read(&event));
+
+ event_report(&event);
+
+ FAIL_IF(event.result.value == 0);
+ /*
+ * For reasons I don't understand enabled is usually just slightly
+ * lower than running. Would be good to confirm why.
+ */
+ FAIL_IF(event.result.enabled == 0);
+ FAIL_IF(event.result.running == 0);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(task_event_pinned_vs_ebb, "task_event_pinned_vs_ebb");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_vs_ebb_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_vs_ebb_test.c
new file mode 100644
index 000000000..eba32196d
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/task_event_vs_ebb_test.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "ebb.h"
+
+
+/*
+ * Tests a per-task event vs an EBB - in that order. The EBB should push the
+ * per-task event off the PMU.
+ */
+
+static int setup_child_event(struct event *event, pid_t child_pid)
+{
+ event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
+
+ event->attr.exclude_kernel = 1;
+ event->attr.exclude_hv = 1;
+ event->attr.exclude_idle = 1;
+
+ FAIL_IF(event_open_with_pid(event, child_pid));
+ FAIL_IF(event_enable(event));
+
+ return 0;
+}
+
+int task_event_vs_ebb(void)
+{
+ union pipe read_pipe, write_pipe;
+ struct event event;
+ pid_t pid;
+ int rc;
+
+ FAIL_IF(pipe(read_pipe.fds) == -1);
+ FAIL_IF(pipe(write_pipe.fds) == -1);
+
+ pid = fork();
+ if (pid == 0) {
+ /* NB order of pipes looks reversed */
+ exit(ebb_child(write_pipe, read_pipe));
+ }
+
+ /* We setup the task event first */
+ rc = setup_child_event(&event, pid);
+ if (rc) {
+ kill_child_and_wait(pid);
+ return rc;
+ }
+
+ /* Signal the child to install its EBB event and wait */
+ if (sync_with_child(read_pipe, write_pipe))
+ /* If it fails, wait for it to exit */
+ goto wait;
+
+ /* Signal the child to run */
+ FAIL_IF(sync_with_child(read_pipe, write_pipe));
+
+wait:
+ /* The EBB event should push the task event off so the child should succeed */
+ FAIL_IF(wait_for_child(pid));
+ FAIL_IF(event_disable(&event));
+ FAIL_IF(event_read(&event));
+
+ event_report(&event);
+
+ /* The task event may have run, or not so we can't assert anything about it */
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(task_event_vs_ebb, "task_event_vs_ebb");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.c
new file mode 100644
index 000000000..251e66ab2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.c
@@ -0,0 +1,300 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include "trace.h"
+
+
+struct trace_buffer *trace_buffer_allocate(u64 size)
+{
+ struct trace_buffer *tb;
+
+ if (size < sizeof(*tb)) {
+ fprintf(stderr, "Error: trace buffer too small\n");
+ return NULL;
+ }
+
+ tb = mmap(NULL, size, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (tb == MAP_FAILED) {
+ perror("mmap");
+ return NULL;
+ }
+
+ tb->size = size;
+ tb->tail = tb->data;
+ tb->overflow = false;
+
+ return tb;
+}
+
+static bool trace_check_bounds(struct trace_buffer *tb, void *p)
+{
+ return p < ((void *)tb + tb->size);
+}
+
+static bool trace_check_alloc(struct trace_buffer *tb, void *p)
+{
+ /*
+ * If we ever overflowed don't allow any more input. This prevents us
+ * from dropping a large item and then later logging a small one. The
+ * buffer should just stop when overflow happened, not be patchy. If
+ * you're overflowing, make your buffer bigger.
+ */
+ if (tb->overflow)
+ return false;
+
+ if (!trace_check_bounds(tb, p)) {
+ tb->overflow = true;
+ return false;
+ }
+
+ return true;
+}
+
+static void *trace_alloc(struct trace_buffer *tb, int bytes)
+{
+ void *p, *newtail;
+
+ p = tb->tail;
+ newtail = tb->tail + bytes;
+ if (!trace_check_alloc(tb, newtail))
+ return NULL;
+
+ tb->tail = newtail;
+
+ return p;
+}
+
+static struct trace_entry *trace_alloc_entry(struct trace_buffer *tb, int payload_size)
+{
+ struct trace_entry *e;
+
+ e = trace_alloc(tb, sizeof(*e) + payload_size);
+ if (e)
+ e->length = payload_size;
+
+ return e;
+}
+
+int trace_log_reg(struct trace_buffer *tb, u64 reg, u64 value)
+{
+ struct trace_entry *e;
+ u64 *p;
+
+ e = trace_alloc_entry(tb, sizeof(reg) + sizeof(value));
+ if (!e)
+ return -ENOSPC;
+
+ e->type = TRACE_TYPE_REG;
+ p = (u64 *)e->data;
+ *p++ = reg;
+ *p++ = value;
+
+ return 0;
+}
+
+int trace_log_counter(struct trace_buffer *tb, u64 value)
+{
+ struct trace_entry *e;
+ u64 *p;
+
+ e = trace_alloc_entry(tb, sizeof(value));
+ if (!e)
+ return -ENOSPC;
+
+ e->type = TRACE_TYPE_COUNTER;
+ p = (u64 *)e->data;
+ *p++ = value;
+
+ return 0;
+}
+
+int trace_log_string(struct trace_buffer *tb, char *str)
+{
+ struct trace_entry *e;
+ char *p;
+ int len;
+
+ len = strlen(str);
+
+ /* We NULL terminate to make printing easier */
+ e = trace_alloc_entry(tb, len + 1);
+ if (!e)
+ return -ENOSPC;
+
+ e->type = TRACE_TYPE_STRING;
+ p = (char *)e->data;
+ memcpy(p, str, len);
+ p += len;
+ *p = '\0';
+
+ return 0;
+}
+
+int trace_log_indent(struct trace_buffer *tb)
+{
+ struct trace_entry *e;
+
+ e = trace_alloc_entry(tb, 0);
+ if (!e)
+ return -ENOSPC;
+
+ e->type = TRACE_TYPE_INDENT;
+
+ return 0;
+}
+
+int trace_log_outdent(struct trace_buffer *tb)
+{
+ struct trace_entry *e;
+
+ e = trace_alloc_entry(tb, 0);
+ if (!e)
+ return -ENOSPC;
+
+ e->type = TRACE_TYPE_OUTDENT;
+
+ return 0;
+}
+
+static void trace_print_header(int seq, int prefix)
+{
+ printf("%*s[%d]: ", prefix, "", seq);
+}
+
+static char *trace_decode_reg(int reg)
+{
+ switch (reg) {
+ case 769: return "SPRN_MMCR2"; break;
+ case 770: return "SPRN_MMCRA"; break;
+ case 779: return "SPRN_MMCR0"; break;
+ case 804: return "SPRN_EBBHR"; break;
+ case 805: return "SPRN_EBBRR"; break;
+ case 806: return "SPRN_BESCR"; break;
+ case 800: return "SPRN_BESCRS"; break;
+ case 801: return "SPRN_BESCRSU"; break;
+ case 802: return "SPRN_BESCRR"; break;
+ case 803: return "SPRN_BESCRRU"; break;
+ case 771: return "SPRN_PMC1"; break;
+ case 772: return "SPRN_PMC2"; break;
+ case 773: return "SPRN_PMC3"; break;
+ case 774: return "SPRN_PMC4"; break;
+ case 775: return "SPRN_PMC5"; break;
+ case 776: return "SPRN_PMC6"; break;
+ case 780: return "SPRN_SIAR"; break;
+ case 781: return "SPRN_SDAR"; break;
+ case 768: return "SPRN_SIER"; break;
+ }
+
+ return NULL;
+}
+
+static void trace_print_reg(struct trace_entry *e)
+{
+ u64 *p, *reg, *value;
+ char *name;
+
+ p = (u64 *)e->data;
+ reg = p++;
+ value = p;
+
+ name = trace_decode_reg(*reg);
+ if (name)
+ printf("register %-10s = 0x%016llx\n", name, *value);
+ else
+ printf("register %lld = 0x%016llx\n", *reg, *value);
+}
+
+static void trace_print_counter(struct trace_entry *e)
+{
+ u64 *value;
+
+ value = (u64 *)e->data;
+ printf("counter = %lld\n", *value);
+}
+
+static void trace_print_string(struct trace_entry *e)
+{
+ char *str;
+
+ str = (char *)e->data;
+ puts(str);
+}
+
+#define BASE_PREFIX 2
+#define PREFIX_DELTA 8
+
+static void trace_print_entry(struct trace_entry *e, int seq, int *prefix)
+{
+ switch (e->type) {
+ case TRACE_TYPE_REG:
+ trace_print_header(seq, *prefix);
+ trace_print_reg(e);
+ break;
+ case TRACE_TYPE_COUNTER:
+ trace_print_header(seq, *prefix);
+ trace_print_counter(e);
+ break;
+ case TRACE_TYPE_STRING:
+ trace_print_header(seq, *prefix);
+ trace_print_string(e);
+ break;
+ case TRACE_TYPE_INDENT:
+ trace_print_header(seq, *prefix);
+ puts("{");
+ *prefix += PREFIX_DELTA;
+ break;
+ case TRACE_TYPE_OUTDENT:
+ *prefix -= PREFIX_DELTA;
+ if (*prefix < BASE_PREFIX)
+ *prefix = BASE_PREFIX;
+ trace_print_header(seq, *prefix);
+ puts("}");
+ break;
+ default:
+ trace_print_header(seq, *prefix);
+ printf("entry @ %p type %d\n", e, e->type);
+ break;
+ }
+}
+
+void trace_buffer_print(struct trace_buffer *tb)
+{
+ struct trace_entry *e;
+ int i, prefix;
+ void *p;
+
+ printf("Trace buffer dump:\n");
+ printf(" address %p \n", tb);
+ printf(" tail %p\n", tb->tail);
+ printf(" size %llu\n", tb->size);
+ printf(" overflow %s\n", tb->overflow ? "TRUE" : "false");
+ printf(" Content:\n");
+
+ p = tb->data;
+
+ i = 0;
+ prefix = BASE_PREFIX;
+
+ while (trace_check_bounds(tb, p) && p < tb->tail) {
+ e = p;
+
+ trace_print_entry(e, i, &prefix);
+
+ i++;
+ p = (void *)e + sizeof(*e) + e->length;
+ }
+}
+
+void trace_print_location(struct trace_buffer *tb)
+{
+ printf("Trace buffer 0x%llx bytes @ %p\n", tb->size, tb);
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.h b/kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.h
new file mode 100644
index 000000000..926458e28
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/trace.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef _SELFTESTS_POWERPC_PMU_EBB_TRACE_H
+#define _SELFTESTS_POWERPC_PMU_EBB_TRACE_H
+
+#include "utils.h"
+
+#define TRACE_TYPE_REG 1
+#define TRACE_TYPE_COUNTER 2
+#define TRACE_TYPE_STRING 3
+#define TRACE_TYPE_INDENT 4
+#define TRACE_TYPE_OUTDENT 5
+
+struct trace_entry
+{
+ u8 type;
+ u8 length;
+ u8 data[0];
+};
+
+struct trace_buffer
+{
+ u64 size;
+ bool overflow;
+ void *tail;
+ u8 data[0];
+};
+
+struct trace_buffer *trace_buffer_allocate(u64 size);
+int trace_log_reg(struct trace_buffer *tb, u64 reg, u64 value);
+int trace_log_counter(struct trace_buffer *tb, u64 value);
+int trace_log_string(struct trace_buffer *tb, char *str);
+int trace_log_indent(struct trace_buffer *tb);
+int trace_log_outdent(struct trace_buffer *tb);
+void trace_buffer_print(struct trace_buffer *tb);
+void trace_print_location(struct trace_buffer *tb);
+
+#endif /* _SELFTESTS_POWERPC_PMU_EBB_TRACE_H */
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/event.c b/kernel/tools/testing/selftests/powerpc/pmu/event.c
new file mode 100644
index 000000000..184b36807
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/event.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+
+#include "event.h"
+
+
+int perf_event_open(struct perf_event_attr *attr, pid_t pid, int cpu,
+ int group_fd, unsigned long flags)
+{
+ return syscall(__NR_perf_event_open, attr, pid, cpu,
+ group_fd, flags);
+}
+
+void event_init_opts(struct event *e, u64 config, int type, char *name)
+{
+ memset(e, 0, sizeof(*e));
+
+ e->name = name;
+
+ e->attr.type = type;
+ e->attr.config = config;
+ e->attr.size = sizeof(e->attr);
+ /* This has to match the structure layout in the header */
+ e->attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | \
+ PERF_FORMAT_TOTAL_TIME_RUNNING;
+}
+
+void event_init_named(struct event *e, u64 config, char *name)
+{
+ event_init_opts(e, config, PERF_TYPE_RAW, name);
+}
+
+void event_init(struct event *e, u64 config)
+{
+ event_init_opts(e, config, PERF_TYPE_RAW, "event");
+}
+
+#define PERF_CURRENT_PID 0
+#define PERF_NO_PID -1
+#define PERF_NO_CPU -1
+#define PERF_NO_GROUP -1
+
+int event_open_with_options(struct event *e, pid_t pid, int cpu, int group_fd)
+{
+ e->fd = perf_event_open(&e->attr, pid, cpu, group_fd, 0);
+ if (e->fd == -1) {
+ perror("perf_event_open");
+ return -1;
+ }
+
+ return 0;
+}
+
+int event_open_with_group(struct event *e, int group_fd)
+{
+ return event_open_with_options(e, PERF_CURRENT_PID, PERF_NO_CPU, group_fd);
+}
+
+int event_open_with_pid(struct event *e, pid_t pid)
+{
+ return event_open_with_options(e, pid, PERF_NO_CPU, PERF_NO_GROUP);
+}
+
+int event_open_with_cpu(struct event *e, int cpu)
+{
+ return event_open_with_options(e, PERF_NO_PID, cpu, PERF_NO_GROUP);
+}
+
+int event_open(struct event *e)
+{
+ return event_open_with_options(e, PERF_CURRENT_PID, PERF_NO_CPU, PERF_NO_GROUP);
+}
+
+void event_close(struct event *e)
+{
+ close(e->fd);
+}
+
+int event_enable(struct event *e)
+{
+ return ioctl(e->fd, PERF_EVENT_IOC_ENABLE);
+}
+
+int event_disable(struct event *e)
+{
+ return ioctl(e->fd, PERF_EVENT_IOC_DISABLE);
+}
+
+int event_reset(struct event *e)
+{
+ return ioctl(e->fd, PERF_EVENT_IOC_RESET);
+}
+
+int event_read(struct event *e)
+{
+ int rc;
+
+ rc = read(e->fd, &e->result, sizeof(e->result));
+ if (rc != sizeof(e->result)) {
+ fprintf(stderr, "read error on event %p!\n", e);
+ return -1;
+ }
+
+ return 0;
+}
+
+void event_report_justified(struct event *e, int name_width, int result_width)
+{
+ printf("%*s: result %*llu ", name_width, e->name, result_width,
+ e->result.value);
+
+ if (e->result.running == e->result.enabled)
+ printf("running/enabled %llu\n", e->result.running);
+ else
+ printf("running %llu enabled %llu\n", e->result.running,
+ e->result.enabled);
+}
+
+void event_report(struct event *e)
+{
+ event_report_justified(e, 0, 0);
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/event.h b/kernel/tools/testing/selftests/powerpc/pmu/event.h
new file mode 100644
index 000000000..a0ea6b1ee
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/event.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef _SELFTESTS_POWERPC_PMU_EVENT_H
+#define _SELFTESTS_POWERPC_PMU_EVENT_H
+
+#include <unistd.h>
+#include <linux/perf_event.h>
+
+#include "utils.h"
+
+
+struct event {
+ struct perf_event_attr attr;
+ char *name;
+ int fd;
+ /* This must match the read_format we use */
+ struct {
+ u64 value;
+ u64 running;
+ u64 enabled;
+ } result;
+};
+
+void event_init(struct event *e, u64 config);
+void event_init_named(struct event *e, u64 config, char *name);
+void event_init_opts(struct event *e, u64 config, int type, char *name);
+int event_open_with_options(struct event *e, pid_t pid, int cpu, int group_fd);
+int event_open_with_group(struct event *e, int group_fd);
+int event_open_with_pid(struct event *e, pid_t pid);
+int event_open_with_cpu(struct event *e, int cpu);
+int event_open(struct event *e);
+void event_close(struct event *e);
+int event_enable(struct event *e);
+int event_disable(struct event *e);
+int event_reset(struct event *e);
+int event_read(struct event *e);
+void event_report_justified(struct event *e, int name_width, int result_width);
+void event_report(struct event *e);
+
+#endif /* _SELFTESTS_POWERPC_PMU_EVENT_H */
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/l3_bank_test.c b/kernel/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
new file mode 100644
index 000000000..77472f314
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "event.h"
+#include "utils.h"
+
+#define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */
+
+/*
+ * Tests that the L3 bank handling is correct. We fixed it in commit e9aaac1.
+ */
+static int l3_bank_test(void)
+{
+ struct event event;
+ char *p;
+ int i;
+
+ p = malloc(MALLOC_SIZE);
+ FAIL_IF(!p);
+
+ event_init(&event, 0x84918F);
+
+ FAIL_IF(event_open(&event));
+
+ for (i = 0; i < MALLOC_SIZE; i += 0x10000)
+ p[i] = i;
+
+ event_read(&event);
+ event_report(&event);
+
+ FAIL_IF(event.result.running == 0);
+ FAIL_IF(event.result.enabled == 0);
+
+ event_close(&event);
+ free(p);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(l3_bank_test, "l3_bank_test");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/lib.c b/kernel/tools/testing/selftests/powerpc/pmu/lib.c
new file mode 100644
index 000000000..a07104c2a
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/lib.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE /* For CPU_ZERO etc. */
+
+#include <errno.h>
+#include <sched.h>
+#include <setjmp.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+
+#include "utils.h"
+#include "lib.h"
+
+
+int pick_online_cpu(void)
+{
+ cpu_set_t mask;
+ int cpu;
+
+ CPU_ZERO(&mask);
+
+ if (sched_getaffinity(0, sizeof(mask), &mask)) {
+ perror("sched_getaffinity");
+ return -1;
+ }
+
+ /* We prefer a primary thread, but skip 0 */
+ for (cpu = 8; cpu < CPU_SETSIZE; cpu += 8)
+ if (CPU_ISSET(cpu, &mask))
+ return cpu;
+
+ /* Search for anything, but in reverse */
+ for (cpu = CPU_SETSIZE - 1; cpu >= 0; cpu--)
+ if (CPU_ISSET(cpu, &mask))
+ return cpu;
+
+ printf("No cpus in affinity mask?!\n");
+ return -1;
+}
+
+int bind_to_cpu(int cpu)
+{
+ cpu_set_t mask;
+
+ printf("Binding to cpu %d\n", cpu);
+
+ CPU_ZERO(&mask);
+ CPU_SET(cpu, &mask);
+
+ return sched_setaffinity(0, sizeof(mask), &mask);
+}
+
+#define PARENT_TOKEN 0xAA
+#define CHILD_TOKEN 0x55
+
+int sync_with_child(union pipe read_pipe, union pipe write_pipe)
+{
+ char c = PARENT_TOKEN;
+
+ FAIL_IF(write(write_pipe.write_fd, &c, 1) != 1);
+ FAIL_IF(read(read_pipe.read_fd, &c, 1) != 1);
+ if (c != CHILD_TOKEN) /* sometimes expected */
+ return 1;
+
+ return 0;
+}
+
+int wait_for_parent(union pipe read_pipe)
+{
+ char c;
+
+ FAIL_IF(read(read_pipe.read_fd, &c, 1) != 1);
+ FAIL_IF(c != PARENT_TOKEN);
+
+ return 0;
+}
+
+int notify_parent(union pipe write_pipe)
+{
+ char c = CHILD_TOKEN;
+
+ FAIL_IF(write(write_pipe.write_fd, &c, 1) != 1);
+
+ return 0;
+}
+
+int notify_parent_of_error(union pipe write_pipe)
+{
+ char c = ~CHILD_TOKEN;
+
+ FAIL_IF(write(write_pipe.write_fd, &c, 1) != 1);
+
+ return 0;
+}
+
+int wait_for_child(pid_t child_pid)
+{
+ int rc;
+
+ if (waitpid(child_pid, &rc, 0) == -1) {
+ perror("waitpid");
+ return 1;
+ }
+
+ if (WIFEXITED(rc))
+ rc = WEXITSTATUS(rc);
+ else
+ rc = 1; /* Signal or other */
+
+ return rc;
+}
+
+int kill_child_and_wait(pid_t child_pid)
+{
+ kill(child_pid, SIGTERM);
+
+ return wait_for_child(child_pid);
+}
+
+static int eat_cpu_child(union pipe read_pipe, union pipe write_pipe)
+{
+ volatile int i = 0;
+
+ /*
+ * We are just here to eat cpu and die. So make sure we can be killed,
+ * and also don't do any custom SIGTERM handling.
+ */
+ signal(SIGTERM, SIG_DFL);
+
+ notify_parent(write_pipe);
+ wait_for_parent(read_pipe);
+
+ /* Soak up cpu forever */
+ while (1) i++;
+
+ return 0;
+}
+
+pid_t eat_cpu(int (test_function)(void))
+{
+ union pipe read_pipe, write_pipe;
+ int cpu, rc;
+ pid_t pid;
+
+ cpu = pick_online_cpu();
+ FAIL_IF(cpu < 0);
+ FAIL_IF(bind_to_cpu(cpu));
+
+ if (pipe(read_pipe.fds) == -1)
+ return -1;
+
+ if (pipe(write_pipe.fds) == -1)
+ return -1;
+
+ pid = fork();
+ if (pid == 0)
+ exit(eat_cpu_child(write_pipe, read_pipe));
+
+ if (sync_with_child(read_pipe, write_pipe)) {
+ rc = -1;
+ goto out;
+ }
+
+ printf("main test running as pid %d\n", getpid());
+
+ rc = test_function();
+out:
+ kill(pid, SIGKILL);
+
+ return rc;
+}
+
+struct addr_range libc, vdso;
+
+int parse_proc_maps(void)
+{
+ unsigned long start, end;
+ char execute, name[128];
+ FILE *f;
+ int rc;
+
+ f = fopen("/proc/self/maps", "r");
+ if (!f) {
+ perror("fopen");
+ return -1;
+ }
+
+ do {
+ /* This skips line with no executable which is what we want */
+ rc = fscanf(f, "%lx-%lx %*c%*c%c%*c %*x %*d:%*d %*d %127s\n",
+ &start, &end, &execute, name);
+ if (rc <= 0)
+ break;
+
+ if (execute != 'x')
+ continue;
+
+ if (strstr(name, "libc")) {
+ libc.first = start;
+ libc.last = end - 1;
+ } else if (strstr(name, "[vdso]")) {
+ vdso.first = start;
+ vdso.last = end - 1;
+ }
+ } while(1);
+
+ fclose(f);
+
+ return 0;
+}
+
+#define PARANOID_PATH "/proc/sys/kernel/perf_event_paranoid"
+
+bool require_paranoia_below(int level)
+{
+ unsigned long current;
+ char *end, buf[16];
+ FILE *f;
+ int rc;
+
+ rc = -1;
+
+ f = fopen(PARANOID_PATH, "r");
+ if (!f) {
+ perror("fopen");
+ goto out;
+ }
+
+ if (!fgets(buf, sizeof(buf), f)) {
+ printf("Couldn't read " PARANOID_PATH "?\n");
+ goto out_close;
+ }
+
+ current = strtoul(buf, &end, 10);
+
+ if (end == buf) {
+ printf("Couldn't parse " PARANOID_PATH "?\n");
+ goto out_close;
+ }
+
+ if (current >= level)
+ goto out;
+
+ rc = 0;
+out_close:
+ fclose(f);
+out:
+ return rc;
+}
+
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/lib.h b/kernel/tools/testing/selftests/powerpc/pmu/lib.h
new file mode 100644
index 000000000..ca5d72ae3
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/lib.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef __SELFTESTS_POWERPC_PMU_LIB_H
+#define __SELFTESTS_POWERPC_PMU_LIB_H
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+union pipe {
+ struct {
+ int read_fd;
+ int write_fd;
+ };
+ int fds[2];
+};
+
+extern int pick_online_cpu(void);
+extern int bind_to_cpu(int cpu);
+extern int kill_child_and_wait(pid_t child_pid);
+extern int wait_for_child(pid_t child_pid);
+extern int sync_with_child(union pipe read_pipe, union pipe write_pipe);
+extern int wait_for_parent(union pipe read_pipe);
+extern int notify_parent(union pipe write_pipe);
+extern int notify_parent_of_error(union pipe write_pipe);
+extern pid_t eat_cpu(int (test_function)(void));
+extern bool require_paranoia_below(int level);
+
+struct addr_range {
+ uint64_t first, last;
+};
+
+extern struct addr_range libc, vdso;
+
+int parse_proc_maps(void);
+
+#endif /* __SELFTESTS_POWERPC_PMU_LIB_H */
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/loop.S b/kernel/tools/testing/selftests/powerpc/pmu/loop.S
new file mode 100644
index 000000000..20c1f0876
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/loop.S
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <ppc-asm.h>
+
+ .text
+
+FUNC_START(thirty_two_instruction_loop)
+ cmpdi r3,0
+ beqlr
+ addi r4,r3,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1
+ addi r4,r4,1 # 28 addi's
+ subi r3,r3,1
+ b FUNC_NAME(thirty_two_instruction_loop)
+FUNC_END(thirty_two_instruction_loop)
diff --git a/kernel/tools/testing/selftests/powerpc/pmu/per_event_excludes.c b/kernel/tools/testing/selftests/powerpc/pmu/per_event_excludes.c
new file mode 100644
index 000000000..fddbbc9ca
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/per_event_excludes.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE
+
+#include <elf.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sys/prctl.h>
+
+#include "event.h"
+#include "lib.h"
+#include "utils.h"
+
+/*
+ * Test that per-event excludes work.
+ */
+
+static int per_event_excludes(void)
+{
+ struct event *e, events[4];
+ char *platform;
+ int i;
+
+ platform = (char *)get_auxv_entry(AT_BASE_PLATFORM);
+ FAIL_IF(!platform);
+ SKIP_IF(strcmp(platform, "power8") != 0);
+
+ /*
+ * We need to create the events disabled, otherwise the running/enabled
+ * counts don't match up.
+ */
+ e = &events[0];
+ event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS,
+ PERF_TYPE_HARDWARE, "instructions");
+ e->attr.disabled = 1;
+
+ e = &events[1];
+ event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS,
+ PERF_TYPE_HARDWARE, "instructions(k)");
+ e->attr.disabled = 1;
+ e->attr.exclude_user = 1;
+ e->attr.exclude_hv = 1;
+
+ e = &events[2];
+ event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS,
+ PERF_TYPE_HARDWARE, "instructions(h)");
+ e->attr.disabled = 1;
+ e->attr.exclude_user = 1;
+ e->attr.exclude_kernel = 1;
+
+ e = &events[3];
+ event_init_opts(e, PERF_COUNT_HW_INSTRUCTIONS,
+ PERF_TYPE_HARDWARE, "instructions(u)");
+ e->attr.disabled = 1;
+ e->attr.exclude_hv = 1;
+ e->attr.exclude_kernel = 1;
+
+ FAIL_IF(event_open(&events[0]));
+
+ /*
+ * The open here will fail if we don't have per event exclude support,
+ * because the second event has an incompatible set of exclude settings
+ * and we're asking for the events to be in a group.
+ */
+ for (i = 1; i < 4; i++)
+ FAIL_IF(event_open_with_group(&events[i], events[0].fd));
+
+ /*
+ * Even though the above will fail without per-event excludes we keep
+ * testing in order to be thorough.
+ */
+ prctl(PR_TASK_PERF_EVENTS_ENABLE);
+
+ /* Spin for a while */
+ for (i = 0; i < INT_MAX; i++)
+ asm volatile("" : : : "memory");
+
+ prctl(PR_TASK_PERF_EVENTS_DISABLE);
+
+ for (i = 0; i < 4; i++) {
+ FAIL_IF(event_read(&events[i]));
+ event_report(&events[i]);
+ }
+
+ /*
+ * We should see that all events have enabled == running. That
+ * shows that they were all on the PMU at once.
+ */
+ for (i = 0; i < 4; i++)
+ FAIL_IF(events[i].result.running != events[i].result.enabled);
+
+ /*
+ * We can also check that the result for instructions is >= all the
+ * other counts. That's because it is counting all instructions while
+ * the others are counting a subset.
+ */
+ for (i = 1; i < 4; i++)
+ FAIL_IF(events[0].result.value < events[i].result.value);
+
+ for (i = 0; i < 4; i++)
+ event_close(&events[i]);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(per_event_excludes, "per_event_excludes");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/primitives/.gitignore b/kernel/tools/testing/selftests/powerpc/primitives/.gitignore
new file mode 100644
index 000000000..4cc4e31be
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/primitives/.gitignore
@@ -0,0 +1 @@
+load_unaligned_zeropad
diff --git a/kernel/tools/testing/selftests/powerpc/primitives/Makefile b/kernel/tools/testing/selftests/powerpc/primitives/Makefile
new file mode 100644
index 000000000..b68c6221d
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/primitives/Makefile
@@ -0,0 +1,12 @@
+CFLAGS += -I$(CURDIR)
+
+TEST_PROGS := load_unaligned_zeropad
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c
+
+include ../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/kernel/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h b/kernel/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h
new file mode 120000
index 000000000..b14255e15
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h
@@ -0,0 +1 @@
+../.././../../../../arch/powerpc/include/asm/asm-compat.h \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h b/kernel/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h
diff --git a/kernel/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c b/kernel/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
new file mode 100644
index 000000000..d1b647509
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
@@ -0,0 +1,147 @@
+/*
+ * Userspace test harness for load_unaligned_zeropad. Creates two
+ * pages and uses mprotect to prevent access to the second page and
+ * a SEGV handler that walks the exception tables and runs the fixup
+ * routine.
+ *
+ * The results are compared against a normal load that is that is
+ * performed while access to the second page is enabled via mprotect.
+ *
+ * Copyright (C) 2014 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#define FIXUP_SECTION ".ex_fixup"
+
+#include "word-at-a-time.h"
+
+#include "utils.h"
+
+
+static int page_size;
+static char *mem_region;
+
+static int protect_region(void)
+{
+ if (mprotect(mem_region + page_size, page_size, PROT_NONE)) {
+ perror("mprotect");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int unprotect_region(void)
+{
+ if (mprotect(mem_region + page_size, page_size, PROT_READ|PROT_WRITE)) {
+ perror("mprotect");
+ return 1;
+ }
+
+ return 0;
+}
+
+extern char __start___ex_table[];
+extern char __stop___ex_table[];
+
+#if defined(__powerpc64__)
+#define UCONTEXT_NIA(UC) (UC)->uc_mcontext.gp_regs[PT_NIP]
+#elif defined(__powerpc__)
+#define UCONTEXT_NIA(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_NIP]
+#else
+#error implement UCONTEXT_NIA
+#endif
+
+static int segv_error;
+
+static void segv_handler(int signr, siginfo_t *info, void *ptr)
+{
+ ucontext_t *uc = (ucontext_t *)ptr;
+ unsigned long addr = (unsigned long)info->si_addr;
+ unsigned long *ip = &UCONTEXT_NIA(uc);
+ unsigned long *ex_p = (unsigned long *)__start___ex_table;
+
+ while (ex_p < (unsigned long *)__stop___ex_table) {
+ unsigned long insn, fixup;
+
+ insn = *ex_p++;
+ fixup = *ex_p++;
+
+ if (insn == *ip) {
+ *ip = fixup;
+ return;
+ }
+ }
+
+ printf("No exception table match for NIA %lx ADDR %lx\n", *ip, addr);
+ segv_error++;
+}
+
+static void setup_segv_handler(void)
+{
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_sigaction = segv_handler;
+ action.sa_flags = SA_SIGINFO;
+ sigaction(SIGSEGV, &action, NULL);
+}
+
+static int do_one_test(char *p, int page_offset)
+{
+ unsigned long should;
+ unsigned long got;
+
+ FAIL_IF(unprotect_region());
+ should = *(unsigned long *)p;
+ FAIL_IF(protect_region());
+
+ got = load_unaligned_zeropad(p);
+
+ if (should != got)
+ printf("offset %u load_unaligned_zeropad returned 0x%lx, should be 0x%lx\n", page_offset, got, should);
+
+ return 0;
+}
+
+static int test_body(void)
+{
+ unsigned long i;
+
+ page_size = getpagesize();
+ mem_region = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+
+ FAIL_IF(mem_region == MAP_FAILED);
+
+ for (i = 0; i < page_size; i++)
+ mem_region[i] = i;
+
+ memset(mem_region+page_size, 0, page_size);
+
+ setup_segv_handler();
+
+ for (i = 0; i < page_size; i++)
+ FAIL_IF(do_one_test(mem_region+i, i));
+
+ FAIL_IF(segv_error);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_body, "load_unaligned_zeropad");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/primitives/word-at-a-time.h b/kernel/tools/testing/selftests/powerpc/primitives/word-at-a-time.h
new file mode 120000
index 000000000..eb74401b5
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/primitives/word-at-a-time.h
@@ -0,0 +1 @@
+../../../../../arch/powerpc/include/asm/word-at-a-time.h \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/.gitignore b/kernel/tools/testing/selftests/powerpc/stringloops/.gitignore
new file mode 100644
index 000000000..0b43da74e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/stringloops/.gitignore
@@ -0,0 +1 @@
+memcmp
diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/Makefile b/kernel/tools/testing/selftests/powerpc/stringloops/Makefile
new file mode 100644
index 000000000..2a728f4d2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/stringloops/Makefile
@@ -0,0 +1,15 @@
+# The loops are all 64-bit code
+CFLAGS += -m64
+CFLAGS += -I$(CURDIR)
+
+TEST_PROGS := memcmp
+EXTRA_SOURCES := memcmp_64.S ../harness.c
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): $(EXTRA_SOURCES)
+
+include ../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h b/kernel/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h
new file mode 100644
index 000000000..11bece87e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h
@@ -0,0 +1,7 @@
+#include <ppc-asm.h>
+
+#ifndef r1
+#define r1 sp
+#endif
+
+#define _GLOBAL(A) FUNC_START(test_ ## A)
diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c
new file mode 100644
index 000000000..17417dd70
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c
@@ -0,0 +1,103 @@
+#include <malloc.h>
+#include <stdlib.h>
+#include <string.h>
+#include "../utils.h"
+
+#define SIZE 256
+#define ITERATIONS 10000
+
+int test_memcmp(const void *s1, const void *s2, size_t n);
+
+/* test all offsets and lengths */
+static void test_one(char *s1, char *s2)
+{
+ unsigned long offset, size;
+
+ for (offset = 0; offset < SIZE; offset++) {
+ for (size = 0; size < (SIZE-offset); size++) {
+ int x, y;
+ unsigned long i;
+
+ y = memcmp(s1+offset, s2+offset, size);
+ x = test_memcmp(s1+offset, s2+offset, size);
+
+ if (((x ^ y) < 0) && /* Trick to compare sign */
+ ((x | y) != 0)) { /* check for zero */
+ printf("memcmp returned %d, should have returned %d (offset %ld size %ld)\n", x, y, offset, size);
+
+ for (i = offset; i < offset+size; i++)
+ printf("%02x ", s1[i]);
+ printf("\n");
+
+ for (i = offset; i < offset+size; i++)
+ printf("%02x ", s2[i]);
+ printf("\n");
+ abort();
+ }
+ }
+ }
+}
+
+static int testcase(void)
+{
+ char *s1;
+ char *s2;
+ unsigned long i;
+
+ s1 = memalign(128, SIZE);
+ if (!s1) {
+ perror("memalign");
+ exit(1);
+ }
+
+ s2 = memalign(128, SIZE);
+ if (!s2) {
+ perror("memalign");
+ exit(1);
+ }
+
+ srandom(1);
+
+ for (i = 0; i < ITERATIONS; i++) {
+ unsigned long j;
+ unsigned long change;
+
+ for (j = 0; j < SIZE; j++)
+ s1[j] = random();
+
+ memcpy(s2, s1, SIZE);
+
+ /* change one byte */
+ change = random() % SIZE;
+ s2[change] = random() & 0xff;
+
+ test_one(s1, s2);
+ }
+
+ srandom(1);
+
+ for (i = 0; i < ITERATIONS; i++) {
+ unsigned long j;
+ unsigned long change;
+
+ for (j = 0; j < SIZE; j++)
+ s1[j] = random();
+
+ memcpy(s2, s1, SIZE);
+
+ /* change multiple bytes, 1/8 of total */
+ for (j = 0; j < SIZE / 8; j++) {
+ change = random() % SIZE;
+ s2[change] = random() & 0xff;
+ }
+
+ test_one(s1, s2);
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(testcase, "memcmp");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/memcmp_64.S b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp_64.S
new file mode 120000
index 000000000..9bc87e438
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp_64.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/memcmp_64.S \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/subunit.h b/kernel/tools/testing/selftests/powerpc/subunit.h
new file mode 100644
index 000000000..9c6c4e901
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/subunit.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef _SELFTESTS_POWERPC_SUBUNIT_H
+#define _SELFTESTS_POWERPC_SUBUNIT_H
+
+static inline void test_start(char *name)
+{
+ printf("test: %s\n", name);
+}
+
+static inline void test_failure_detail(char *name, char *detail)
+{
+ printf("failure: %s [%s]\n", name, detail);
+}
+
+static inline void test_failure(char *name)
+{
+ printf("failure: %s\n", name);
+}
+
+static inline void test_error(char *name)
+{
+ printf("error: %s\n", name);
+}
+
+static inline void test_skip(char *name)
+{
+ printf("skip: %s\n", name);
+}
+
+static inline void test_success(char *name)
+{
+ printf("success: %s\n", name);
+}
+
+static inline void test_finish(char *name, int status)
+{
+ if (status)
+ test_failure(name);
+ else
+ test_success(name);
+}
+
+static inline void test_set_git_version(char *value)
+{
+ printf("tags: git_version:%s\n", value);
+}
+
+#endif /* _SELFTESTS_POWERPC_SUBUNIT_H */
diff --git a/kernel/tools/testing/selftests/powerpc/switch_endian/.gitignore b/kernel/tools/testing/selftests/powerpc/switch_endian/.gitignore
new file mode 100644
index 000000000..89e762eab
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/switch_endian/.gitignore
@@ -0,0 +1,2 @@
+switch_endian_test
+check-reversed.S
diff --git a/kernel/tools/testing/selftests/powerpc/switch_endian/Makefile b/kernel/tools/testing/selftests/powerpc/switch_endian/Makefile
new file mode 100644
index 000000000..081473db2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/switch_endian/Makefile
@@ -0,0 +1,24 @@
+CC := $(CROSS_COMPILE)gcc
+PROGS := switch_endian_test
+
+ASFLAGS += -O2 -Wall -g -nostdlib -m64
+
+all: $(PROGS)
+
+switch_endian_test: check-reversed.S
+
+check-reversed.o: check.o
+ $(CROSS_COMPILE)objcopy -j .text --reverse-bytes=4 -O binary $< $@
+
+check-reversed.S: check-reversed.o
+ hexdump -v -e '/1 ".byte 0x%02X\n"' $< > $@
+
+run_tests: all
+ @-for PROG in $(PROGS); do \
+ ./$$PROG; \
+ done;
+
+clean:
+ rm -f $(PROGS) *.o check-reversed.S
+
+.PHONY: all run_tests clean
diff --git a/kernel/tools/testing/selftests/powerpc/switch_endian/check.S b/kernel/tools/testing/selftests/powerpc/switch_endian/check.S
new file mode 100644
index 000000000..e2484d2c2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/switch_endian/check.S
@@ -0,0 +1,100 @@
+#include "common.h"
+
+/*
+ * Checks that registers contain what we expect, ie. they were not clobbered by
+ * the syscall.
+ *
+ * r15: pattern to check registers against.
+ *
+ * At the end r3 == 0 if everything's OK.
+ */
+ nop # guaranteed to be illegal in reverse-endian
+ mr r9,r15
+ cmpd r9,r3 # check r3
+ bne 1f
+ addi r9,r15,4 # check r4
+ cmpd r9,r4
+ bne 1f
+ lis r9,0x00FF # check CR
+ ori r9,r9,0xF000
+ mfcr r10
+ and r10,r10,r9
+ cmpw r9,r10
+ addi r9,r15,34
+ bne 1f
+ addi r9,r15,32 # check LR
+ mflr r10
+ cmpd r9,r10
+ bne 1f
+ addi r9,r15,5 # check r5
+ cmpd r9,r5
+ bne 1f
+ addi r9,r15,6 # check r6
+ cmpd r9,r6
+ bne 1f
+ addi r9,r15,7 # check r7
+ cmpd r9,r7
+ bne 1f
+ addi r9,r15,8 # check r8
+ cmpd r9,r8
+ bne 1f
+ addi r9,r15,13 # check r13
+ cmpd r9,r13
+ bne 1f
+ addi r9,r15,14 # check r14
+ cmpd r9,r14
+ bne 1f
+ addi r9,r15,16 # check r16
+ cmpd r9,r16
+ bne 1f
+ addi r9,r15,17 # check r17
+ cmpd r9,r17
+ bne 1f
+ addi r9,r15,18 # check r18
+ cmpd r9,r18
+ bne 1f
+ addi r9,r15,19 # check r19
+ cmpd r9,r19
+ bne 1f
+ addi r9,r15,20 # check r20
+ cmpd r9,r20
+ bne 1f
+ addi r9,r15,21 # check r21
+ cmpd r9,r21
+ bne 1f
+ addi r9,r15,22 # check r22
+ cmpd r9,r22
+ bne 1f
+ addi r9,r15,23 # check r23
+ cmpd r9,r23
+ bne 1f
+ addi r9,r15,24 # check r24
+ cmpd r9,r24
+ bne 1f
+ addi r9,r15,25 # check r25
+ cmpd r9,r25
+ bne 1f
+ addi r9,r15,26 # check r26
+ cmpd r9,r26
+ bne 1f
+ addi r9,r15,27 # check r27
+ cmpd r9,r27
+ bne 1f
+ addi r9,r15,28 # check r28
+ cmpd r9,r28
+ bne 1f
+ addi r9,r15,29 # check r29
+ cmpd r9,r29
+ bne 1f
+ addi r9,r15,30 # check r30
+ cmpd r9,r30
+ bne 1f
+ addi r9,r15,31 # check r31
+ cmpd r9,r31
+ bne 1f
+ b 2f
+1: mr r3, r9
+ li r0, __NR_exit
+ sc
+2: li r0, __NR_switch_endian
+ nop
diff --git a/kernel/tools/testing/selftests/powerpc/switch_endian/common.h b/kernel/tools/testing/selftests/powerpc/switch_endian/common.h
new file mode 100644
index 000000000..69e399698
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/switch_endian/common.h
@@ -0,0 +1,6 @@
+#include <ppc-asm.h>
+#include <asm/unistd.h>
+
+#ifndef __NR_switch_endian
+#define __NR_switch_endian 363
+#endif
diff --git a/kernel/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S b/kernel/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S
new file mode 100644
index 000000000..ef7c971ab
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S
@@ -0,0 +1,81 @@
+#include "common.h"
+
+ .data
+ .balign 8
+message:
+ .ascii "success: switch_endian_test\n\0"
+
+ .section ".toc"
+ .balign 8
+pattern:
+ .llong 0x5555AAAA5555AAAA
+
+ .text
+FUNC_START(_start)
+ /* Load the pattern */
+ ld r15, pattern@TOC(%r2)
+
+ /* Setup CR, only CR2-CR4 are maintained */
+ lis r3, 0x00FF
+ ori r3, r3, 0xF000
+ mtcr r3
+
+ /* Load the pattern slightly modified into the registers */
+ mr r3, r15
+ addi r4, r15, 4
+
+ addi r5, r15, 32
+ mtlr r5
+
+ addi r5, r15, 5
+ addi r6, r15, 6
+ addi r7, r15, 7
+ addi r8, r15, 8
+
+ /* r9 - r12 are clobbered */
+
+ addi r13, r15, 13
+ addi r14, r15, 14
+
+ /* Skip r15 we're using it */
+
+ addi r16, r15, 16
+ addi r17, r15, 17
+ addi r18, r15, 18
+ addi r19, r15, 19
+ addi r20, r15, 20
+ addi r21, r15, 21
+ addi r22, r15, 22
+ addi r23, r15, 23
+ addi r24, r15, 24
+ addi r25, r15, 25
+ addi r26, r15, 26
+ addi r27, r15, 27
+ addi r28, r15, 28
+ addi r29, r15, 29
+ addi r30, r15, 30
+ addi r31, r15, 31
+
+ /*
+ * Call the syscall to switch endian.
+ * It clobbers r9-r12, XER, CTR and CR0-1,5-7.
+ */
+ li r0, __NR_switch_endian
+ sc
+
+#include "check-reversed.S"
+
+ /* Flip back, r0 already has the switch syscall number */
+ .long 0x02000044 /* sc */
+
+#include "check.S"
+
+ li r0, __NR_write
+ li r3, 1 /* stdout */
+ ld r4, message@got(%r2)
+ li r5, 28 /* strlen(message3) */
+ sc
+ li r0, __NR_exit
+ li r3, 0
+ sc
+ b .
diff --git a/kernel/tools/testing/selftests/powerpc/tm/.gitignore b/kernel/tools/testing/selftests/powerpc/tm/.gitignore
new file mode 100644
index 000000000..2699635d2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/tm/.gitignore
@@ -0,0 +1,2 @@
+tm-resched-dscr
+tm-syscall
diff --git a/kernel/tools/testing/selftests/powerpc/tm/Makefile b/kernel/tools/testing/selftests/powerpc/tm/Makefile
new file mode 100644
index 000000000..6bff955e1
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/tm/Makefile
@@ -0,0 +1,13 @@
+TEST_PROGS := tm-resched-dscr
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c
+
+tm-syscall: tm-syscall-asm.S
+tm-syscall: CFLAGS += -mhtm
+
+include ../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/kernel/tools/testing/selftests/powerpc/tm/tm-resched-dscr.c b/kernel/tools/testing/selftests/powerpc/tm/tm-resched-dscr.c
new file mode 100644
index 000000000..42d4c8caa
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/tm/tm-resched-dscr.c
@@ -0,0 +1,98 @@
+/* Test context switching to see if the DSCR SPR is correctly preserved
+ * when within a transaction.
+ *
+ * Note: We assume that the DSCR has been left at the default value (0)
+ * for all CPUs.
+ *
+ * Method:
+ *
+ * Set a value into the DSCR.
+ *
+ * Start a transaction, and suspend it (*).
+ *
+ * Hard loop checking to see if the transaction has become doomed.
+ *
+ * Now that we *may* have been preempted, record the DSCR and TEXASR SPRS.
+ *
+ * If the abort was because of a context switch, check the DSCR value.
+ * Otherwise, try again.
+ *
+ * (*) If the transaction is not suspended we can't see the problem because
+ * the transaction abort handler will restore the DSCR to it's checkpointed
+ * value before we regain control.
+ */
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <asm/tm.h>
+
+#include "utils.h"
+
+#define TBEGIN ".long 0x7C00051D ;"
+#define TEND ".long 0x7C00055D ;"
+#define TCHECK ".long 0x7C00059C ;"
+#define TSUSPEND ".long 0x7C0005DD ;"
+#define TRESUME ".long 0x7C2005DD ;"
+#define SPRN_TEXASR 0x82
+#define SPRN_DSCR 0x03
+
+int test_body(void)
+{
+ uint64_t rv, dscr1 = 1, dscr2, texasr;
+
+ printf("Check DSCR TM context switch: ");
+ fflush(stdout);
+ for (;;) {
+ rv = 1;
+ asm __volatile__ (
+ /* set a known value into the DSCR */
+ "ld 3, %[dscr1];"
+ "mtspr %[sprn_dscr], 3;"
+
+ /* start and suspend a transaction */
+ TBEGIN
+ "beq 1f;"
+ TSUSPEND
+
+ /* hard loop until the transaction becomes doomed */
+ "2: ;"
+ TCHECK
+ "bc 4, 0, 2b;"
+
+ /* record DSCR and TEXASR */
+ "mfspr 3, %[sprn_dscr];"
+ "std 3, %[dscr2];"
+ "mfspr 3, %[sprn_texasr];"
+ "std 3, %[texasr];"
+
+ TRESUME
+ TEND
+ "li %[rv], 0;"
+ "1: ;"
+ : [rv]"=r"(rv), [dscr2]"=m"(dscr2), [texasr]"=m"(texasr)
+ : [dscr1]"m"(dscr1)
+ , [sprn_dscr]"i"(SPRN_DSCR), [sprn_texasr]"i"(SPRN_TEXASR)
+ : "memory", "r3"
+ );
+ assert(rv); /* make sure the transaction aborted */
+ if ((texasr >> 56) != TM_CAUSE_RESCHED) {
+ putchar('.');
+ fflush(stdout);
+ continue;
+ }
+ if (dscr2 != dscr1) {
+ printf(" FAIL\n");
+ return 1;
+ } else {
+ printf(" OK\n");
+ return 0;
+ }
+ }
+}
+
+int main(void)
+{
+ return test_harness(test_body, "tm_resched_dscr");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/tm/tm-syscall-asm.S b/kernel/tools/testing/selftests/powerpc/tm/tm-syscall-asm.S
new file mode 100644
index 000000000..431f61ae2
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/tm/tm-syscall-asm.S
@@ -0,0 +1,27 @@
+#include <ppc-asm.h>
+#include <asm/unistd.h>
+
+ .text
+FUNC_START(getppid_tm_active)
+ tbegin.
+ beq 1f
+ li r0, __NR_getppid
+ sc
+ tend.
+ blr
+1:
+ li r3, -1
+ blr
+
+FUNC_START(getppid_tm_suspended)
+ tbegin.
+ beq 1f
+ li r0, __NR_getppid
+ tsuspend.
+ sc
+ tresume.
+ tend.
+ blr
+1:
+ li r3, -1
+ blr
diff --git a/kernel/tools/testing/selftests/powerpc/tm/tm-syscall.c b/kernel/tools/testing/selftests/powerpc/tm/tm-syscall.c
new file mode 100644
index 000000000..3ed8d4b25
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/tm/tm-syscall.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2015, Sam Bobroff, IBM Corp.
+ * Licensed under GPLv2.
+ *
+ * Test the kernel's system call code to ensure that a system call
+ * made from within an active HTM transaction is aborted with the
+ * correct failure code.
+ * Conversely, ensure that a system call made from within a
+ * suspended transaction can succeed.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <asm/tm.h>
+#include <asm/cputable.h>
+#include <linux/auxvec.h>
+#include <sys/time.h>
+#include <stdlib.h>
+
+#include "utils.h"
+
+extern int getppid_tm_active(void);
+extern int getppid_tm_suspended(void);
+
+unsigned retries = 0;
+
+#define TEST_DURATION 10 /* seconds */
+#define TM_RETRIES 100
+
+long failure_code(void)
+{
+ return __builtin_get_texasru() >> 24;
+}
+
+bool failure_is_persistent(void)
+{
+ return (failure_code() & TM_CAUSE_PERSISTENT) == TM_CAUSE_PERSISTENT;
+}
+
+bool failure_is_syscall(void)
+{
+ return (failure_code() & TM_CAUSE_SYSCALL) == TM_CAUSE_SYSCALL;
+}
+
+pid_t getppid_tm(bool suspend)
+{
+ int i;
+ pid_t pid;
+
+ for (i = 0; i < TM_RETRIES; i++) {
+ if (suspend)
+ pid = getppid_tm_suspended();
+ else
+ pid = getppid_tm_active();
+
+ if (pid >= 0)
+ return pid;
+
+ if (failure_is_persistent()) {
+ if (failure_is_syscall())
+ return -1;
+
+ printf("Unexpected persistent transaction failure.\n");
+ printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
+ __builtin_get_texasr(), __builtin_get_tfiar());
+ exit(-1);
+ }
+
+ retries++;
+ }
+
+ printf("Exceeded limit of %d temporary transaction failures.\n", TM_RETRIES);
+ printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
+ __builtin_get_texasr(), __builtin_get_tfiar());
+
+ exit(-1);
+}
+
+int tm_syscall(void)
+{
+ unsigned count = 0;
+ struct timeval end, now;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ setbuf(stdout, NULL);
+
+ printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION);
+
+ gettimeofday(&end, NULL);
+ now.tv_sec = TEST_DURATION;
+ now.tv_usec = 0;
+ timeradd(&end, &now, &end);
+
+ for (count = 0; timercmp(&now, &end, <); count++) {
+ /*
+ * Test a syscall within a suspended transaction and verify
+ * that it succeeds.
+ */
+ FAIL_IF(getppid_tm(true) == -1); /* Should succeed. */
+
+ /*
+ * Test a syscall within an active transaction and verify that
+ * it fails with the correct failure code.
+ */
+ FAIL_IF(getppid_tm(false) != -1); /* Should fail... */
+ FAIL_IF(!failure_is_persistent()); /* ...persistently... */
+ FAIL_IF(!failure_is_syscall()); /* ...with code syscall. */
+ gettimeofday(&now, 0);
+ }
+
+ printf("%d active and suspended transactions behaved correctly.\n", count);
+ printf("(There were %d transaction retries.)\n", retries);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(tm_syscall, "tm_syscall");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/utils.h b/kernel/tools/testing/selftests/powerpc/utils.h
new file mode 100644
index 000000000..b7d41086b
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/utils.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2013, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#ifndef _SELFTESTS_POWERPC_UTILS_H
+#define _SELFTESTS_POWERPC_UTILS_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/* Avoid headaches with PRI?64 - just use %ll? always */
+typedef unsigned long long u64;
+typedef signed long long s64;
+
+/* Just for familiarity */
+typedef uint32_t u32;
+typedef uint16_t u16;
+typedef uint8_t u8;
+
+
+int test_harness(int (test_function)(void), char *name);
+extern void *get_auxv_entry(int type);
+
+/* Yes, this is evil */
+#define FAIL_IF(x) \
+do { \
+ if ((x)) { \
+ fprintf(stderr, \
+ "[FAIL] Test FAILED on line %d\n", __LINE__); \
+ return 1; \
+ } \
+} while (0)
+
+/* The test harness uses this, yes it's gross */
+#define MAGIC_SKIP_RETURN_VALUE 99
+
+#define SKIP_IF(x) \
+do { \
+ if ((x)) { \
+ fprintf(stderr, \
+ "[SKIP] Test skipped on line %d\n", __LINE__); \
+ return MAGIC_SKIP_RETURN_VALUE; \
+ } \
+} while (0)
+
+#define _str(s) #s
+#define str(s) _str(s)
+
+#endif /* _SELFTESTS_POWERPC_UTILS_H */
diff --git a/kernel/tools/testing/selftests/powerpc/vphn/.gitignore b/kernel/tools/testing/selftests/powerpc/vphn/.gitignore
new file mode 100644
index 000000000..7c0439501
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/vphn/.gitignore
@@ -0,0 +1 @@
+test-vphn
diff --git a/kernel/tools/testing/selftests/powerpc/vphn/Makefile b/kernel/tools/testing/selftests/powerpc/vphn/Makefile
new file mode 100644
index 000000000..e539f775f
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/vphn/Makefile
@@ -0,0 +1,15 @@
+PROG := test-vphn
+
+CFLAGS += -m64
+
+all: $(PROG)
+
+$(PROG): ../harness.c
+
+run_tests: all
+ ./$(PROG)
+
+clean:
+ rm -f $(PROG)
+
+.PHONY: all run_tests clean
diff --git a/kernel/tools/testing/selftests/powerpc/vphn/test-vphn.c b/kernel/tools/testing/selftests/powerpc/vphn/test-vphn.c
new file mode 100644
index 000000000..5742f6876
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/vphn/test-vphn.c
@@ -0,0 +1,410 @@
+#include <stdio.h>
+#include <byteswap.h>
+#include "utils.h"
+#include "subunit.h"
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define cpu_to_be32(x) bswap_32(x)
+#define be32_to_cpu(x) bswap_32(x)
+#define be16_to_cpup(x) bswap_16(*x)
+#define cpu_to_be64(x) bswap_64(x)
+#else
+#define cpu_to_be32(x) (x)
+#define be32_to_cpu(x) (x)
+#define be16_to_cpup(x) (*x)
+#define cpu_to_be64(x) (x)
+#endif
+
+#include "vphn.c"
+
+static struct test {
+ char *descr;
+ long input[VPHN_REGISTER_COUNT];
+ u32 expected[VPHN_ASSOC_BUFSIZE];
+} all_tests[] = {
+ {
+ "vphn: no data",
+ {
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ },
+ {
+ 0x00000000
+ }
+ },
+ {
+ "vphn: 1 x 16-bit value",
+ {
+ 0x8001ffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ },
+ {
+ 0x00000001,
+ 0x00000001
+ }
+ },
+ {
+ "vphn: 2 x 16-bit values",
+ {
+ 0x80018002ffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ },
+ {
+ 0x00000002,
+ 0x00000001,
+ 0x00000002
+ }
+ },
+ {
+ "vphn: 3 x 16-bit values",
+ {
+ 0x800180028003ffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ },
+ {
+ 0x00000003,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003
+ }
+ },
+ {
+ "vphn: 4 x 16-bit values",
+ {
+ 0x8001800280038004,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ },
+ {
+ 0x00000004,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003,
+ 0x00000004
+ }
+ },
+ {
+ /* Parsing the next 16-bit value out of the next 64-bit input
+ * value.
+ */
+ "vphn: 5 x 16-bit values",
+ {
+ 0x8001800280038004,
+ 0x8005ffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ },
+ {
+ 0x00000005,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003,
+ 0x00000004,
+ 0x00000005
+ }
+ },
+ {
+ /* Parse at most 6 x 64-bit input values */
+ "vphn: 24 x 16-bit values",
+ {
+ 0x8001800280038004,
+ 0x8005800680078008,
+ 0x8009800a800b800c,
+ 0x800d800e800f8010,
+ 0x8011801280138014,
+ 0x8015801680178018
+ },
+ {
+ 0x00000018,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003,
+ 0x00000004,
+ 0x00000005,
+ 0x00000006,
+ 0x00000007,
+ 0x00000008,
+ 0x00000009,
+ 0x0000000a,
+ 0x0000000b,
+ 0x0000000c,
+ 0x0000000d,
+ 0x0000000e,
+ 0x0000000f,
+ 0x00000010,
+ 0x00000011,
+ 0x00000012,
+ 0x00000013,
+ 0x00000014,
+ 0x00000015,
+ 0x00000016,
+ 0x00000017,
+ 0x00000018
+ }
+ },
+ {
+ "vphn: 1 x 32-bit value",
+ {
+ 0x00000001ffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000001,
+ 0x00000001
+ }
+ },
+ {
+ "vphn: 2 x 32-bit values",
+ {
+ 0x0000000100000002,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000002,
+ 0x00000001,
+ 0x00000002
+ }
+ },
+ {
+ /* Parsing the next 32-bit value out of the next 64-bit input
+ * value.
+ */
+ "vphn: 3 x 32-bit values",
+ {
+ 0x0000000100000002,
+ 0x00000003ffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000003,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003
+ }
+ },
+ {
+ /* Parse at most 6 x 64-bit input values */
+ "vphn: 12 x 32-bit values",
+ {
+ 0x0000000100000002,
+ 0x0000000300000004,
+ 0x0000000500000006,
+ 0x0000000700000008,
+ 0x000000090000000a,
+ 0x0000000b0000000c
+ },
+ {
+ 0x0000000c,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003,
+ 0x00000004,
+ 0x00000005,
+ 0x00000006,
+ 0x00000007,
+ 0x00000008,
+ 0x00000009,
+ 0x0000000a,
+ 0x0000000b,
+ 0x0000000c
+ }
+ },
+ {
+ "vphn: 16-bit value followed by 32-bit value",
+ {
+ 0x800100000002ffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000002,
+ 0x00000001,
+ 0x00000002
+ }
+ },
+ {
+ "vphn: 32-bit value followed by 16-bit value",
+ {
+ 0x000000018002ffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000002,
+ 0x00000001,
+ 0x00000002
+ }
+ },
+ {
+ /* Parse a 32-bit value split accross two consecutives 64-bit
+ * input values.
+ */
+ "vphn: 16-bit value followed by 2 x 32-bit values",
+ {
+ 0x8001000000020000,
+ 0x0003ffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000003,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003,
+ 0x00000004,
+ 0x00000005
+ }
+ },
+ {
+ /* The lower bits in 0x0001ffff don't get mixed up with the
+ * 0xffff terminator.
+ */
+ "vphn: 32-bit value has all ones in 16 lower bits",
+ {
+ 0x0001ffff80028003,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff,
+ 0xffffffffffffffff
+ },
+ {
+ 0x00000003,
+ 0x0001ffff,
+ 0x00000002,
+ 0x00000003
+ }
+ },
+ {
+ /* The following input doesn't follow the specification.
+ */
+ "vphn: last 32-bit value is truncated",
+ {
+ 0x0000000100000002,
+ 0x0000000300000004,
+ 0x0000000500000006,
+ 0x0000000700000008,
+ 0x000000090000000a,
+ 0x0000000b800c2bad
+ },
+ {
+ 0x0000000c,
+ 0x00000001,
+ 0x00000002,
+ 0x00000003,
+ 0x00000004,
+ 0x00000005,
+ 0x00000006,
+ 0x00000007,
+ 0x00000008,
+ 0x00000009,
+ 0x0000000a,
+ 0x0000000b,
+ 0x0000000c
+ }
+ },
+ {
+ "vphn: garbage after terminator",
+ {
+ 0xffff2bad2bad2bad,
+ 0x2bad2bad2bad2bad,
+ 0x2bad2bad2bad2bad,
+ 0x2bad2bad2bad2bad,
+ 0x2bad2bad2bad2bad,
+ 0x2bad2bad2bad2bad
+ },
+ {
+ 0x00000000
+ }
+ },
+ {
+ NULL
+ }
+};
+
+static int test_one(struct test *test)
+{
+ __be32 output[VPHN_ASSOC_BUFSIZE] = { 0 };
+ int i, len;
+
+ vphn_unpack_associativity(test->input, output);
+
+ len = be32_to_cpu(output[0]);
+ if (len != test->expected[0]) {
+ printf("expected %d elements, got %d\n", test->expected[0],
+ len);
+ return 1;
+ }
+
+ for (i = 1; i < len; i++) {
+ u32 val = be32_to_cpu(output[i]);
+ if (val != test->expected[i]) {
+ printf("element #%d is 0x%x, should be 0x%x\n", i, val,
+ test->expected[i]);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int test_vphn(void)
+{
+ static struct test *test;
+
+ for (test = all_tests; test->descr; test++) {
+ int ret;
+
+ ret = test_one(test);
+ test_finish(test->descr, ret);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ return test_harness(test_vphn, "test-vphn");
+}
diff --git a/kernel/tools/testing/selftests/powerpc/vphn/vphn.c b/kernel/tools/testing/selftests/powerpc/vphn/vphn.c
new file mode 120000
index 000000000..186b906e6
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/vphn/vphn.c
@@ -0,0 +1 @@
+../../../../../arch/powerpc/mm/vphn.c \ No newline at end of file
diff --git a/kernel/tools/testing/selftests/powerpc/vphn/vphn.h b/kernel/tools/testing/selftests/powerpc/vphn/vphn.h
new file mode 120000
index 000000000..7131efe38
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/vphn/vphn.h
@@ -0,0 +1 @@
+../../../../../arch/powerpc/mm/vphn.h \ No newline at end of file