mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
selftests/powerpc/pmu/: Add interface test for mmcr1_comb field
The testcase uses event code "0x26880" to verify the settings for different fields in Monitor Mode Control Register 1 (MMCR1). The field include PMCxCOMB. Checks if this field are translated correctly via perf interface to MMCR1 Add selftest for mmcr1 comb field. Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> [mpe: Add error checking, drop GET_MMCR_FIELD, add to .gitignore] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220127072012.662451-16-kjain@linux.ibm.com
This commit is contained in:
parent
6e11374b08
commit
2becea3b6a
3 changed files with 69 additions and 1 deletions
|
@ -4,3 +4,4 @@ mmcr0_pmccext_test
|
|||
mmcr0_pmcjce_test
|
||||
mmcr0_fc56_pmc1ce_test
|
||||
mmcr0_fc56_pmc56_test
|
||||
mmcr1_comb_test
|
||||
|
|
|
@ -2,7 +2,8 @@
|
|||
CFLAGS += -m64
|
||||
|
||||
TEST_GEN_PROGS := mmcr0_exceptionbits_test mmcr0_cc56run_test mmcr0_pmccext_test \
|
||||
mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test
|
||||
mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test \
|
||||
mmcr1_comb_test
|
||||
|
||||
top_srcdir = ../../../../../..
|
||||
include ../../../lib.mk
|
||||
|
|
|
@ -0,0 +1,66 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright 2022, Athira Rajeev, IBM Corp.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "../event.h"
|
||||
#include "misc.h"
|
||||
#include "utils.h"
|
||||
|
||||
/* All successful D-side store dispatches for this thread that were L2 Miss */
|
||||
#define EventCode 0x46880
|
||||
|
||||
extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target);
|
||||
|
||||
/*
|
||||
* A perf sampling test for mmcr1
|
||||
* fields : comb.
|
||||
*/
|
||||
static int mmcr1_comb(void)
|
||||
{
|
||||
struct event event;
|
||||
u64 *intr_regs;
|
||||
u64 dummy;
|
||||
|
||||
/* Check for platform support for the test */
|
||||
SKIP_IF(check_pvr_for_sampling_tests());
|
||||
|
||||
/* Init the event for the sampling test */
|
||||
event_init_sampling(&event, EventCode);
|
||||
event.attr.sample_regs_intr = platform_extended_mask;
|
||||
FAIL_IF(event_open(&event));
|
||||
event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
|
||||
|
||||
FAIL_IF(event_enable(&event));
|
||||
|
||||
/* workload to make the event overflow */
|
||||
thirty_two_instruction_loop_with_ll_sc(10000000, &dummy);
|
||||
|
||||
FAIL_IF(event_disable(&event));
|
||||
|
||||
/* Check for sample count */
|
||||
FAIL_IF(!collect_samples(event.mmap_buffer));
|
||||
|
||||
intr_regs = get_intr_regs(&event, event.mmap_buffer);
|
||||
|
||||
/* Check for intr_regs */
|
||||
FAIL_IF(!intr_regs);
|
||||
|
||||
/*
|
||||
* Verify that comb field match with
|
||||
* corresponding event code fields
|
||||
*/
|
||||
FAIL_IF(EV_CODE_EXTRACT(event.attr.config, comb) !=
|
||||
get_mmcr1_comb(get_reg_value(intr_regs, "MMCR1"), 4));
|
||||
|
||||
event_close(&event);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main(void)
|
||||
{
|
||||
return test_harness(mmcr1_comb, "mmcr1_comb");
|
||||
}
|
Loading…
Reference in a new issue