1*c55dabc6SKajol Jain // SPDX-License-Identifier: GPL-2.0-only
2*c55dabc6SKajol Jain /*
3*c55dabc6SKajol Jain  * Copyright 2022, Kajol Jain, IBM Corp.
4*c55dabc6SKajol Jain  */
5*c55dabc6SKajol Jain 
6*c55dabc6SKajol Jain #include <stdio.h>
7*c55dabc6SKajol Jain #include <stdlib.h>
8*c55dabc6SKajol Jain 
9*c55dabc6SKajol Jain #include "../event.h"
10*c55dabc6SKajol Jain #include "misc.h"
11*c55dabc6SKajol Jain #include "utils.h"
12*c55dabc6SKajol Jain 
13*c55dabc6SKajol Jain extern void indirect_branch_loop(void);
14*c55dabc6SKajol Jain 
15*c55dabc6SKajol Jain /* Instructions */
16*c55dabc6SKajol Jain #define EventCode 0x500fa
17*c55dabc6SKajol Jain 
18*c55dabc6SKajol Jain /* ifm field for indirect branch mode */
19*c55dabc6SKajol Jain #define IFM_IND_BRANCH 0x2
20*c55dabc6SKajol Jain 
21*c55dabc6SKajol Jain /*
22*c55dabc6SKajol Jain  * A perf sampling test for mmcra
23*c55dabc6SKajol Jain  * field: ifm for bhrb ind_call.
24*c55dabc6SKajol Jain  */
mmcra_bhrb_ind_call_test(void)25*c55dabc6SKajol Jain static int mmcra_bhrb_ind_call_test(void)
26*c55dabc6SKajol Jain {
27*c55dabc6SKajol Jain 	struct event event;
28*c55dabc6SKajol Jain 	u64 *intr_regs;
29*c55dabc6SKajol Jain 
30*c55dabc6SKajol Jain 	/*
31*c55dabc6SKajol Jain 	 * Check for platform support for the test.
32*c55dabc6SKajol Jain 	 * This test is only aplicable on power10
33*c55dabc6SKajol Jain 	 */
34*c55dabc6SKajol Jain 	SKIP_IF(check_pvr_for_sampling_tests());
35*c55dabc6SKajol Jain 	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
36*c55dabc6SKajol Jain 
37*c55dabc6SKajol Jain 	 /* Init the event for the sampling test */
38*c55dabc6SKajol Jain 	event_init_sampling(&event, EventCode);
39*c55dabc6SKajol Jain 	event.attr.sample_regs_intr = platform_extended_mask;
40*c55dabc6SKajol Jain 	event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
41*c55dabc6SKajol Jain 	event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_IND_CALL;
42*c55dabc6SKajol Jain 	event.attr.exclude_kernel = 1;
43*c55dabc6SKajol Jain 
44*c55dabc6SKajol Jain 	FAIL_IF(event_open(&event));
45*c55dabc6SKajol Jain 	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
46*c55dabc6SKajol Jain 
47*c55dabc6SKajol Jain 	FAIL_IF(event_enable(&event));
48*c55dabc6SKajol Jain 
49*c55dabc6SKajol Jain 	/* workload to make the event overflow */
50*c55dabc6SKajol Jain 	indirect_branch_loop();
51*c55dabc6SKajol Jain 
52*c55dabc6SKajol Jain 	FAIL_IF(event_disable(&event));
53*c55dabc6SKajol Jain 
54*c55dabc6SKajol Jain 	intr_regs = get_intr_regs(&event, event.mmap_buffer);
55*c55dabc6SKajol Jain 
56*c55dabc6SKajol Jain 	/* Check for intr_regs */
57*c55dabc6SKajol Jain 	FAIL_IF(!intr_regs);
58*c55dabc6SKajol Jain 
59*c55dabc6SKajol Jain 	/* Verify that ifm bit is set properly in MMCRA */
60*c55dabc6SKajol Jain 	FAIL_IF(get_mmcra_ifm(get_reg_value(intr_regs, "MMCRA"), 5) != IFM_IND_BRANCH);
61*c55dabc6SKajol Jain 
62*c55dabc6SKajol Jain 	event_close(&event);
63*c55dabc6SKajol Jain 	return 0;
64*c55dabc6SKajol Jain }
65*c55dabc6SKajol Jain 
main(void)66*c55dabc6SKajol Jain int main(void)
67*c55dabc6SKajol Jain {
68*c55dabc6SKajol Jain 	return test_harness(mmcra_bhrb_ind_call_test, "mmcra_bhrb_ind_call_test");
69*c55dabc6SKajol Jain }
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