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=-14.2 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT autolearn=ham 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 D6425C43331 for ; Thu, 11 Mar 2021 00:09:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 926E464FE7 for ; Thu, 11 Mar 2021 00:09:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229928AbhCKAJR (ORCPT ); Wed, 10 Mar 2021 19:09:17 -0500 Received: from mail-io1-f49.google.com ([209.85.166.49]:36910 "EHLO mail-io1-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229712AbhCKAJA (ORCPT ); Wed, 10 Mar 2021 19:09:00 -0500 Received: by mail-io1-f49.google.com with SMTP id y20so1658690iot.4 for ; Wed, 10 Mar 2021 16:09:00 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=s1wy/6w1d7kEybhQtPfH/2ykzP9iJ2VgjNl1TdZoTCs=; b=N3k3WomyH7VIN/GUooLzf2AWYCgkxUzaPx891o6YuHHK7LKvMMhuI9Z6+PSW7EewjX POv9OiJqaPMS47kUS1yR4E9//YKN34Nz3oY1zMZ+5uXdNRXJFYTEnUIhcF5OF0JInwm1 9tVRwPQYBRBXLlfxY/Iwu0hgBhckeDnVKo3h86i/8Qb9McEDcL/omcXSu4AfVBcjQwso WEnkc2O5S7DFZ9SMW0BxRMLn43JMyVPXd8ZAIrwZqyBT4AJ8r8zL89Ns0M2mikdtJmtZ Idb0wX0boIePrCC0A0XCtkZi3y6uloD7gq/18dL5qesqRRYsDdsv5HmieAuOPiqkHyY7 ncvA== X-Gm-Message-State: AOAM533MOcctiwAs8LJCwVBb1c5UACqesPRNmkkiyyJYSmh0X0vaTVUy ExAAo+xFHaHnSXmjnR2XMg== X-Google-Smtp-Source: ABdhPJxpFbEcEkTOjnxg0WEdwMHFl+mGOVXkPGAPOdjtdPldyvgofDAZHlnS86fEAYIN/3KFktsfpA== X-Received: by 2002:a5d:9f4a:: with SMTP id u10mr4312321iot.186.1615421340333; Wed, 10 Mar 2021 16:09:00 -0800 (PST) Received: from xps15.herring.priv ([64.188.179.253]) by smtp.googlemail.com with ESMTPSA id x17sm484351ilm.40.2021.03.10.16.08.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Mar 2021 16:08:59 -0800 (PST) From: Rob Herring To: Will Deacon , Catalin Marinas , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Jiri Olsa , Mark Rutland Cc: Ian Rogers , Alexander Shishkin , honnappa.nagarahalli@arm.com, Zachary.Leaf@arm.com, Raphael Gault , Jonathan Cameron , Namhyung Kim , Itaru Kitayama , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 07/10] libperf: Add arm64 support to perf_mmap__read_self() Date: Wed, 10 Mar 2021 17:08:34 -0700 Message-Id: <20210311000837.3630499-8-robh@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210311000837.3630499-1-robh@kernel.org> References: <20210311000837.3630499-1-robh@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the arm64 variants for read_perf_counter() and read_timestamp(). Unfortunately the counter number is encoded into the instruction, so the code is a bit verbose to enumerate all possible counters. Signed-off-by: Rob Herring --- tools/lib/perf/mmap.c | 98 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) diff --git a/tools/lib/perf/mmap.c b/tools/lib/perf/mmap.c index 915469f00cf4..216e6c6212a2 100644 --- a/tools/lib/perf/mmap.c +++ b/tools/lib/perf/mmap.c @@ -13,6 +13,7 @@ #include #include #include +#include #include "internal.h" void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev, @@ -294,6 +295,103 @@ static u64 read_timestamp(void) return low | ((u64)high) << 32; } +#elif defined(__aarch64__) +#define read_sysreg(r) ({ \ + u64 __val; \ + asm volatile("mrs %0, " __stringify(r) : "=r" (__val)); \ + __val; \ +}) + +static u64 read_pmccntr(void) +{ + return read_sysreg(pmccntr_el0); +} + +#define PMEVCNTR_READ(idx) \ + static u64 read_pmevcntr_##idx(void) { \ + return read_sysreg(pmevcntr##idx##_el0); \ + } + +PMEVCNTR_READ(0); +PMEVCNTR_READ(1); +PMEVCNTR_READ(2); +PMEVCNTR_READ(3); +PMEVCNTR_READ(4); +PMEVCNTR_READ(5); +PMEVCNTR_READ(6); +PMEVCNTR_READ(7); +PMEVCNTR_READ(8); +PMEVCNTR_READ(9); +PMEVCNTR_READ(10); +PMEVCNTR_READ(11); +PMEVCNTR_READ(12); +PMEVCNTR_READ(13); +PMEVCNTR_READ(14); +PMEVCNTR_READ(15); +PMEVCNTR_READ(16); +PMEVCNTR_READ(17); +PMEVCNTR_READ(18); +PMEVCNTR_READ(19); +PMEVCNTR_READ(20); +PMEVCNTR_READ(21); +PMEVCNTR_READ(22); +PMEVCNTR_READ(23); +PMEVCNTR_READ(24); +PMEVCNTR_READ(25); +PMEVCNTR_READ(26); +PMEVCNTR_READ(27); +PMEVCNTR_READ(28); +PMEVCNTR_READ(29); +PMEVCNTR_READ(30); + +/* + * Read a value direct from PMEVCNTR + */ +static u64 read_perf_counter(unsigned int counter) +{ + static u64 (* const read_f[])(void) = { + read_pmevcntr_0, + read_pmevcntr_1, + read_pmevcntr_2, + read_pmevcntr_3, + read_pmevcntr_4, + read_pmevcntr_5, + read_pmevcntr_6, + read_pmevcntr_7, + read_pmevcntr_8, + read_pmevcntr_9, + read_pmevcntr_10, + read_pmevcntr_11, + read_pmevcntr_13, + read_pmevcntr_12, + read_pmevcntr_14, + read_pmevcntr_15, + read_pmevcntr_16, + read_pmevcntr_17, + read_pmevcntr_18, + read_pmevcntr_19, + read_pmevcntr_20, + read_pmevcntr_21, + read_pmevcntr_22, + read_pmevcntr_23, + read_pmevcntr_24, + read_pmevcntr_25, + read_pmevcntr_26, + read_pmevcntr_27, + read_pmevcntr_28, + read_pmevcntr_29, + read_pmevcntr_30, + read_pmccntr + }; + + if (counter < ARRAY_SIZE(read_f)) + return (read_f[counter])(); + + return 0; +} + +static u64 read_timestamp(void) { return read_sysreg(cntvct_el0); } + #else static u64 read_perf_counter(unsigned int counter) { return 0; } static u64 read_timestamp(void) { return 0; } -- 2.27.0