tools/testing/selftests/powerpc/pmu/l3_bank_test.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2014, Michael Ellerman, IBM Corp.
   4  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #include "event.h"
  10 #include "utils.h"
  11
  12 #define MALLOC_SIZE     (0x10000 * 10)  /* Ought to be enough .. */
  13
  14 /*
  15  * Tests that the L3 bank handling is correct. We fixed it in commit e9aaac1.
  16  */
  17 static int l3_bank_test(void)
  18 {
  19         struct event event;
  20         char *p;
  21         int i;
  22
  23         // The L3 bank logic is only used on Power8 or later
  24         SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
  25
  26         p = malloc(MALLOC_SIZE);
  27         FAIL_IF(!p);
  28
  29         event_init(&event, 0x84918F);
  30
  31         FAIL_IF(event_open(&event));
  32
  33         for (i = 0; i < MALLOC_SIZE; i += 0x10000)
  34                 p[i] = i;
  35
  36         event_read(&event);
  37         event_report(&event);
  38
  39         FAIL_IF(event.result.running == 0);
  40         FAIL_IF(event.result.enabled == 0);
  41
  42         event_close(&event);
  43         free(p);
  44
  45         return 0;
  46 }
  47
  48 int main(void)
  49 {
  50         return test_harness(l3_bank_test, "l3_bank_test");
  51 }