1*faa64ddcSKajol Jain // SPDX-License-Identifier: GPL-2.0-only
2*faa64ddcSKajol Jain /*
3*faa64ddcSKajol Jain  * Copyright 2022, Kajol Jain, IBM Corp.
4*faa64ddcSKajol Jain  */
5*faa64ddcSKajol Jain 
6*faa64ddcSKajol Jain #include <stdio.h>
7*faa64ddcSKajol Jain #include <stdlib.h>
8*faa64ddcSKajol Jain 
9*faa64ddcSKajol Jain #include "../event.h"
10*faa64ddcSKajol Jain #include "misc.h"
11*faa64ddcSKajol Jain #include "utils.h"
12*faa64ddcSKajol Jain 
13*faa64ddcSKajol Jain extern void thirty_two_instruction_loop(int loops);
14*faa64ddcSKajol Jain 
15*faa64ddcSKajol Jain /* Instructions */
16*faa64ddcSKajol Jain #define EventCode 0x500fa
17*faa64ddcSKajol Jain 
18*faa64ddcSKajol Jain /* ifm field for any branch mode */
19*faa64ddcSKajol Jain #define IFM_ANY_BRANCH 0x0
20*faa64ddcSKajol Jain 
21*faa64ddcSKajol Jain /*
22*faa64ddcSKajol Jain  * A perf sampling test for mmcra
23*faa64ddcSKajol Jain  * field: ifm for bhrb any call.
24*faa64ddcSKajol Jain  */
mmcra_bhrb_any_test(void)25*faa64ddcSKajol Jain static int mmcra_bhrb_any_test(void)
26*faa64ddcSKajol Jain {
27*faa64ddcSKajol Jain 	struct event event;
28*faa64ddcSKajol Jain 	u64 *intr_regs;
29*faa64ddcSKajol Jain 
30*faa64ddcSKajol Jain 	/* Check for platform support for the test */
31*faa64ddcSKajol Jain 	SKIP_IF(check_pvr_for_sampling_tests());
32*faa64ddcSKajol Jain 
33*faa64ddcSKajol Jain 	 /* Init the event for the sampling test */
34*faa64ddcSKajol Jain 	event_init_sampling(&event, EventCode);
35*faa64ddcSKajol Jain 	event.attr.sample_regs_intr = platform_extended_mask;
36*faa64ddcSKajol Jain 	event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
37*faa64ddcSKajol Jain 	event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_ANY;
38*faa64ddcSKajol Jain 	event.attr.exclude_kernel = 1;
39*faa64ddcSKajol Jain 
40*faa64ddcSKajol Jain 	FAIL_IF(event_open(&event));
41*faa64ddcSKajol Jain 	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
42*faa64ddcSKajol Jain 
43*faa64ddcSKajol Jain 	FAIL_IF(event_enable(&event));
44*faa64ddcSKajol Jain 
45*faa64ddcSKajol Jain 	/* workload to make the event overflow */
46*faa64ddcSKajol Jain 	thirty_two_instruction_loop(10000);
47*faa64ddcSKajol Jain 
48*faa64ddcSKajol Jain 	FAIL_IF(event_disable(&event));
49*faa64ddcSKajol Jain 
50*faa64ddcSKajol Jain 	intr_regs = get_intr_regs(&event, event.mmap_buffer);
51*faa64ddcSKajol Jain 
52*faa64ddcSKajol Jain 	/* Check for intr_regs */
53*faa64ddcSKajol Jain 	FAIL_IF(!intr_regs);
54*faa64ddcSKajol Jain 
55*faa64ddcSKajol Jain 	/* Verify that ifm bit is set properly in MMCRA */
56*faa64ddcSKajol Jain 	FAIL_IF(get_mmcra_ifm(get_reg_value(intr_regs, "MMCRA"), 5) != IFM_ANY_BRANCH);
57*faa64ddcSKajol Jain 
58*faa64ddcSKajol Jain 	event_close(&event);
59*faa64ddcSKajol Jain 	return 0;
60*faa64ddcSKajol Jain }
61*faa64ddcSKajol Jain 
main(void)62*faa64ddcSKajol Jain int main(void)
63*faa64ddcSKajol Jain {
64*faa64ddcSKajol Jain 	return test_harness(mmcra_bhrb_any_test, "mmcra_bhrb_any_test");
65*faa64ddcSKajol Jain }
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