Revision 82c99f7a81f28f8c1be5f701c8377d14c4075b10 authored by Harry Pan on 24 April 2019, 14:50:33 UTC, committed by Ingo Molnar on 25 April 2019, 06:59:31 UTC
Kaby Lake (and Coffee Lake) has PC8/PC9/PC10 residency counters. This patch updates the list of Kaby/Coffee Lake PMU event counters from the snb_cstates[] list of events to the hswult_cstates[] list of events, which keeps all previously supported events and also adds the PKG_C8, PKG_C9 and PKG_C10 residency counters. This allows user space tools to profile them through the perf interface. Signed-off-by: Harry Pan <harry.pan@intel.com> Cc: <stable@vger.kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: gs0622@gmail.com Link: http://lkml.kernel.org/r/20190424145033.1924-1-harry.pan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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rodata_test.c
/*
* rodata_test.c: functional test for mark_rodata_ro function
*
* (C) Copyright 2008 Intel Corporation
* Author: Arjan van de Ven <arjan@linux.intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#define pr_fmt(fmt) "rodata_test: " fmt
#include <linux/uaccess.h>
#include <asm/sections.h>
static const int rodata_test_data = 0xC3;
void rodata_test(void)
{
unsigned long start, end;
int zero = 0;
/* test 1: read the value */
/* If this test fails, some previous testrun has clobbered the state */
if (!rodata_test_data) {
pr_err("test 1 fails (start data)\n");
return;
}
/* test 2: write to the variable; this should fault */
if (!probe_kernel_write((void *)&rodata_test_data,
(void *)&zero, sizeof(zero))) {
pr_err("test data was not read only\n");
return;
}
/* test 3: check the value hasn't changed */
if (rodata_test_data == zero) {
pr_err("test data was changed\n");
return;
}
/* test 4: check if the rodata section is PAGE_SIZE aligned */
start = (unsigned long)__start_rodata;
end = (unsigned long)__end_rodata;
if (start & (PAGE_SIZE - 1)) {
pr_err("start of .rodata is not page size aligned\n");
return;
}
if (end & (PAGE_SIZE - 1)) {
pr_err("end of .rodata is not page size aligned\n");
return;
}
pr_info("all tests were successful\n");
}
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