From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A01BC282C8 for ; Mon, 28 Jan 2019 16:17:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 189832148E for ; Mon, 28 Jan 2019 16:17:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692242; bh=gLX6Wwry4CBQItDQ3xRQ8RYS7JxSabXy30EkN45ONTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gUqVooeALOmHls/jZ79XRXHuVW/lXK3bjSo9aDUt9eYRayjWZILsuHKY08HOUVehw cUwWk8TQ6gws/ogzTtE+59m1WLGgY08eLO7KuhqkD2gEKohf79UQWa4bFdOUEhFMLP PLlRh3pUMJhJF58wBNEcYMSnFCi4q8W0+DIlAOps= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388195AbfA1QRT (ORCPT ); Mon, 28 Jan 2019 11:17:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:51082 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388150AbfA1QRR (ORCPT ); Mon, 28 Jan 2019 11:17:17 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0395720879; Mon, 28 Jan 2019 16:17:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692237; bh=gLX6Wwry4CBQItDQ3xRQ8RYS7JxSabXy30EkN45ONTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KfYmLI22CjSvtFzMxmJtU3dFmkh4pSovJXn6D38MyVDQn+0Ryb+tin7cun/mulY/7 JNVAJ6F3ZDoq29ttTM2Oquyy4Tr8Z/I6tMOh4FJ5R2pvsAfsIYuG+RQ+5OYo3KBDAB WaCR0eghOFNAqR2rTsPJ5mbtRLuD0dnhkUGs+N2A= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Madhavan Srinivasan , Michael Ellerman , Sasha Levin , linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 4.14 122/170] powerpc/perf: Fix thresholding counter data for unknown type Date: Mon, 28 Jan 2019 11:11:12 -0500 Message-Id: <20190128161200.55107-122-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128161200.55107-1-sashal@kernel.org> References: <20190128161200.55107-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Madhavan Srinivasan [ Upstream commit 17cfccc91545682513541924245abb876d296063 ] MMCRA[34:36] and MMCRA[38:44] expose the thresholding counter value. Thresholding counter can be used to count latency cycles such as load miss to reload. But threshold counter value is not relevant when the sampled instruction type is unknown or reserved. Patch to fix the thresholding counter value to zero when sampled instruction type is unknown or reserved. Fixes: 170a315f41c6('powerpc/perf: Support to export MMCRA[TEC*] field to userspace') Signed-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin --- arch/powerpc/perf/isa207-common.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c index 2efee3f196f5..cf9c35aa0cf4 100644 --- a/arch/powerpc/perf/isa207-common.c +++ b/arch/powerpc/perf/isa207-common.c @@ -228,8 +228,13 @@ void isa207_get_mem_weight(u64 *weight) u64 mmcra = mfspr(SPRN_MMCRA); u64 exp = MMCRA_THR_CTR_EXP(mmcra); u64 mantissa = MMCRA_THR_CTR_MANT(mmcra); + u64 sier = mfspr(SPRN_SIER); + u64 val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT; - *weight = mantissa << (2 * exp); + if (val == 0 || val == 7) + *weight = 0; + else + *weight = mantissa << (2 * exp); } int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp) -- 2.19.1