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arch-arm: Fix initialization of PMU counters

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A version of Linux kernel initializes counters before enabling them.
Without this change, gem5 overwrites the value of counter, which causes
incorrect counter values derived by kernel.

Change-Id: If0c515111103018d5f65f74434d7711a67aeaee4
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/16203
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
This commit is contained in:
Ruben Ayrapetyan
2019-01-29 19:19:51 +00:00
committed by Giacomo Travaglini
parent 34b73dea1b
commit c2b6aac2a8
1 changed files with 5 additions and 2 deletions
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7
src/arch/arm/pmu.cc
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2011-2014, 2017-2018 ARM Limited
* Copyright (c) 2011-2014, 2017-2019 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -532,7 +532,10 @@ PMU::CounterState::detach()
void
PMU::CounterState::attach(PMUEvent* event)
{
value = 0;
if (!resetValue) {
value = 0;
resetValue = true;
}
sourceEvent = event;
sourceEvent->attachEvent(this);
}