selftests/powerpc: Revert Load Monitor Register Tests

Load monitored won't be supported in POWER9, so PPC_FEATURE2_ARCH_3_00
(in HWCAP2) will no longer imply Load monitor support.

These Load monitored tests are enabled by PPC_FEATURE2_ARCH_3_00 so
they are now bogus and need to be removed.

This reverts commit 16c19a2e9833 ("selftests/powerpc: Load Monitor
Register Tests").

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/tools/testing/selftests/powerpc/pmu/ebb/.gitignore b/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
index 44b7df14a9368db88ea3bca3e144f0b740c12151..42bddbed8b6464bf3bb774f471376ac8f832d2a1 100644 (file)
--- a/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
+++ b/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
@@ -20,5 +20,3 @@ 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 6b0453e60d531d7bef149cc47041c58332d83b5d..8d2279c4bb4b6a81cb5713f6ba3bf92b72f2e3e7 100644 (file)
--- 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 ebb_lmr ebb_lmr_regs
+        cycles_with_mmcr2_test
 
 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
deleted file mode 100644 (file)
index c47ebd5..0000000
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * 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
deleted file mode 100644 (file)
index ef50abd..0000000
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#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
deleted file mode 100644 (file)
index aff4241..0000000
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr_regs.c
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * 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 fddf368ed82f44800cb95f16a14c46b56d195c0a..65bfdeeebdee876c77a2094776b4904f440eca4f 100644 (file)
--- a/tools/testing/selftests/powerpc/reg.h
+++ b/tools/testing/selftests/powerpc/reg.h
@@ -34,11 +34,6 @@
 
 #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