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-rw-r--r--tools/testing/selftests/powerpc/pmu/ebb/.gitignore2
-rw-r--r--tools/testing/selftests/powerpc/pmu/ebb/Makefile2
-rw-r--r--tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.c143
-rw-r--r--tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.h39
-rw-r--r--tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr_regs.c37
-rw-r--r--tools/testing/selftests/powerpc/reg.h5
6 files changed, 227 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/.gitignore b/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
index 42bddbed8b64..44b7df14a936 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
+++ b/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
@@ -20,3 +20,5 @@ back_to_back_ebbs_test
lost_exception_test
no_handler_test
cycles_with_mmcr2_test
+ebb_lmr
+ebb_lmr_regs \ No newline at end of file
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
index 8d2279c4bb4b..6b0453e60d53 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
@@ -14,7 +14,7 @@ TEST_PROGS := reg_access_test event_attributes_test cycles_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
+ cycles_with_mmcr2_test ebb_lmr ebb_lmr_regs
all: $(TEST_PROGS)
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.c
new file mode 100644
index 000000000000..c47ebd55ba4d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2016, Jack Miller, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "ebb.h"
+#include "ebb_lmr.h"
+
+#define SIZE (32 * 1024 * 1024) /* 32M */
+#define LM_SIZE 0 /* Smallest encoding, 32M */
+
+#define SECTIONS 64 /* 1 per bit in LMSER */
+#define SECTION_SIZE (SIZE / SECTIONS)
+#define SECTION_LONGS (SECTION_SIZE / sizeof(long))
+
+static unsigned long *test_mem;
+
+static int lmr_count = 0;
+
+void ebb_lmr_handler(void)
+{
+ lmr_count++;
+}
+
+void ldmx_full_section(unsigned long *mem, int section)
+{
+ unsigned long *ptr;
+ int i;
+
+ for (i = 0; i < SECTION_LONGS; i++) {
+ ptr = &mem[(SECTION_LONGS * section) + i];
+ ldmx((unsigned long) &ptr);
+ ebb_lmr_reset();
+ }
+}
+
+unsigned long section_masks[] = {
+ 0x8000000000000000,
+ 0xFF00000000000000,
+ 0x0000000F70000000,
+ 0x8000000000000001,
+ 0xF0F0F0F0F0F0F0F0,
+ 0x0F0F0F0F0F0F0F0F,
+ 0x0
+};
+
+int ebb_lmr_section_test(unsigned long *mem)
+{
+ unsigned long *mask = section_masks;
+ int i;
+
+ for (; *mask; mask++) {
+ mtspr(SPRN_LMSER, *mask);
+ printf("Testing mask 0x%016lx\n", mfspr(SPRN_LMSER));
+
+ for (i = 0; i < 64; i++) {
+ lmr_count = 0;
+ ldmx_full_section(mem, i);
+ if (*mask & (1UL << (63 - i)))
+ FAIL_IF(lmr_count != SECTION_LONGS);
+ else
+ FAIL_IF(lmr_count);
+ }
+ }
+
+ return 0;
+}
+
+int ebb_lmr(void)
+{
+ int i;
+
+ SKIP_IF(!lmr_is_supported());
+
+ setup_ebb_handler(ebb_lmr_handler);
+
+ ebb_global_enable();
+
+ FAIL_IF(posix_memalign((void **)&test_mem, SIZE, SIZE) != 0);
+
+ mtspr(SPRN_LMSER, 0);
+
+ FAIL_IF(mfspr(SPRN_LMSER) != 0);
+
+ mtspr(SPRN_LMRR, ((unsigned long)test_mem | LM_SIZE));
+
+ FAIL_IF(mfspr(SPRN_LMRR) != ((unsigned long)test_mem | LM_SIZE));
+
+ /* Read every single byte to ensure we get no false positives */
+ for (i = 0; i < SECTIONS; i++)
+ ldmx_full_section(test_mem, i);
+
+ FAIL_IF(lmr_count != 0);
+
+ /* Turn on the first section */
+
+ mtspr(SPRN_LMSER, (1UL << 63));
+ FAIL_IF(mfspr(SPRN_LMSER) != (1UL << 63));
+
+ /* Enable LM (BESCR) */
+
+ mtspr(SPRN_BESCR, mfspr(SPRN_BESCR) | BESCR_LME);
+ FAIL_IF(!(mfspr(SPRN_BESCR) & BESCR_LME));
+
+ ldmx((unsigned long)&test_mem);
+
+ FAIL_IF(lmr_count != 1); // exactly one exception
+ FAIL_IF(mfspr(SPRN_BESCR) & BESCR_LME); // LM now disabled
+ FAIL_IF(!(mfspr(SPRN_BESCR) & BESCR_LMEO)); // occurred bit set
+
+ printf("Simple LMR EBB OK\n");
+
+ /* This shouldn't cause an EBB since it's been disabled */
+ ldmx((unsigned long)&test_mem);
+ FAIL_IF(lmr_count != 1);
+
+ printf("LMR disable on EBB OK\n");
+
+ ebb_lmr_reset();
+
+ /* This should cause an EBB or reset is broken */
+ ldmx((unsigned long)&test_mem);
+ FAIL_IF(lmr_count != 2);
+
+ printf("LMR reset EBB OK\n");
+
+ ebb_lmr_reset();
+
+ return ebb_lmr_section_test(test_mem);
+}
+
+int main(void)
+{
+ int ret = test_harness(ebb_lmr, "ebb_lmr");
+
+ if (test_mem)
+ free(test_mem);
+
+ return ret;
+}
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.h b/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.h
new file mode 100644
index 000000000000..ef50abd557cd
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.h
@@ -0,0 +1,39 @@
+#ifndef _SELFTESTS_POWERPC_PMU_EBB_LMR_H
+#define _SELFTESTS_POWERPC_PMU_EBB_LMR_H
+
+#include "reg.h"
+
+#ifndef PPC_FEATURE2_ARCH_3_00
+#define PPC_FEATURE2_ARCH_3_00 0x00800000
+#endif
+
+#define lmr_is_supported() have_hwcap2(PPC_FEATURE2_ARCH_3_00)
+
+static inline void ebb_lmr_reset(void)
+{
+ unsigned long bescr = mfspr(SPRN_BESCR);
+ bescr &= ~(BESCR_LMEO);
+ bescr |= BESCR_LME;
+ mtspr(SPRN_BESCR, bescr);
+}
+
+#define LDMX(t, a, b)\
+ (0x7c00026a | \
+ (((t) & 0x1f) << 21) | \
+ (((a) & 0x1f) << 16) | \
+ (((b) & 0x1f) << 11))
+
+static inline unsigned long ldmx(unsigned long address)
+{
+ unsigned long ret;
+
+ asm volatile ("mr 9, %1\r\n"
+ ".long " __stringify(LDMX(9, 0, 9)) "\r\n"
+ "mr %0, 9\r\n":"=r"(ret)
+ :"r"(address)
+ :"r9");
+
+ return ret;
+}
+
+#endif
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr_regs.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr_regs.c
new file mode 100644
index 000000000000..aff4241fd88a
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr_regs.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2016, Jack Miller, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "ebb.h"
+#include "ebb_lmr.h"
+
+#define CHECKS 10000
+
+int ebb_lmr_regs(void)
+{
+ int i;
+
+ SKIP_IF(!lmr_is_supported());
+
+ ebb_global_enable();
+
+ for (i = 0; i < CHECKS; i++) {
+ mtspr(SPRN_LMRR, i << 25); // skip size and rsvd bits
+ mtspr(SPRN_LMSER, i);
+
+ FAIL_IF(mfspr(SPRN_LMRR) != (i << 25));
+ FAIL_IF(mfspr(SPRN_LMSER) != i);
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(ebb_lmr_regs, "ebb_lmr_regs");
+}
diff --git a/tools/testing/selftests/powerpc/reg.h b/tools/testing/selftests/powerpc/reg.h
index 65bfdeeebdee..fddf368ed82f 100644
--- a/tools/testing/selftests/powerpc/reg.h
+++ b/tools/testing/selftests/powerpc/reg.h
@@ -34,6 +34,11 @@
#define BESCR_PMEO 0x1 /* PMU Event-based exception Occurred */
#define BESCR_PME (0x1ul << 32) /* PMU Event-based exception Enable */
+#define BESCR_LME (0x1ul << 34) /* Load Monitor Enable */
+#define BESCR_LMEO (0x1ul << 2) /* Load Monitor Exception Occurred */
+
+#define SPRN_LMRR 813 /* Load Monitor Region Register */
+#define SPRN_LMSER 814 /* Load Monitor Section Enable Register */
#define SPRN_PMC1 771
#define SPRN_PMC2 772
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-11-19 07:38:52 +0100