1 files changed, 0 insertions, 100 deletions
diff --git a/powerpc/pmu/ebb/lost_exception_test.c b/powerpc/pmu/ebb/lost_exception_test.c
deleted file mode 100644
index 0c9dd9b..0000000
--- a/powerpc/pmu/ebb/lost_exception_test.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * 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");
-}