Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754678AbbHXOUq (ORCPT ); Mon, 24 Aug 2015 10:20:46 -0400 Received: from smtprelay.synopsys.com ([198.182.47.9]:38064 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753824AbbHXOUl (ORCPT ); Mon, 24 Aug 2015 10:20:41 -0400 From: Alexey Brodkin To: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Vineet.Gupta1@synopsys.com, arc-linux-dev@synopsys.com, arnd@arndb.de, peterz@infradead.org, Arnaldo Carvalho de Melo , Alexey Brodkin Subject: [PATCH v3 1/6] ARC: perf: cap the number of counters to hardware max of 32 Date: Mon, 24 Aug 2015 17:20:18 +0300 Message-Id: <1440426023-2792-2-git-send-email-abrodkin@synopsys.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1440426023-2792-1-git-send-email-abrodkin@synopsys.com> References: <1440426023-2792-1-git-send-email-abrodkin@synopsys.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2827 Lines: 84 From: Vineet Gupta The number of counters in PCT can never be more than 32 (while countable conditions could be 100+) for both ARCompact and ARCv2 And while at it update copyright dates. Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Signed-off-by: Vineet Gupta Signed-off-by: Alexey Brodkin --- Compared to v2: [1] Updated copyright date in arch/arc/kernel/perf_event.c No changes since v1. arch/arc/include/asm/perf_event.h | 5 +++-- arch/arc/kernel/perf_event.c | 6 +++--- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/arc/include/asm/perf_event.h b/arch/arc/include/asm/perf_event.h index 2b8880e..e7b16c2 100644 --- a/arch/arc/include/asm/perf_event.h +++ b/arch/arc/include/asm/perf_event.h @@ -1,6 +1,7 @@ /* * Linux performance counter support for ARC * + * Copyright (C) 2014-2015 Synopsys, Inc. (www.synopsys.com) * Copyright (C) 2011-2013 Synopsys, Inc. (www.synopsys.com) * * This program is free software; you can redistribute it and/or modify @@ -12,8 +13,8 @@ #ifndef __ASM_PERF_EVENT_H #define __ASM_PERF_EVENT_H -/* real maximum varies per CPU, this is the maximum supported by the driver */ -#define ARC_PMU_MAX_HWEVENTS 64 +/* Max number of counters that PCT block may ever have */ +#define ARC_PERF_MAX_COUNTERS 32 #define ARC_REG_CC_BUILD 0xF6 #define ARC_REG_CC_INDEX 0x240 diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c index 1287388..d7ee5b2 100644 --- a/arch/arc/kernel/perf_event.c +++ b/arch/arc/kernel/perf_event.c @@ -1,7 +1,7 @@ /* * Linux performance counter support for ARC700 series * - * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com) + * Copyright (C) 2013-2015 Synopsys, Inc. (www.synopsys.com) * * This code is inspired by the perf support of various other architectures. * @@ -22,7 +22,7 @@ struct arc_pmu { struct pmu pmu; int counter_size; /* in bits */ int n_counters; - unsigned long used_mask[BITS_TO_LONGS(ARC_PMU_MAX_HWEVENTS)]; + unsigned long used_mask[BITS_TO_LONGS(ARC_PERF_MAX_COUNTERS)]; int ev_hw_idx[PERF_COUNT_ARC_HW_MAX]; }; @@ -284,7 +284,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev) pr_err("This core does not have performance counters!\n"); return -ENODEV; } - BUG_ON(pct_bcr.c > ARC_PMU_MAX_HWEVENTS); + BUG_ON(pct_bcr.c > ARC_PERF_MAX_COUNTERS); READ_BCR(ARC_REG_CC_BUILD, cc_bcr); BUG_ON(!cc_bcr.v); /* Counters exist but No countable conditions ? */ -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/