From patchwork Mon Dec 16 20:47:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 11295223 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 59D701580 for ; Mon, 16 Dec 2019 20:48:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3755A218AC for ; Mon, 16 Dec 2019 20:48:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="FzPSZZR3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727531AbfLPUsX (ORCPT ); Mon, 16 Dec 2019 15:48:23 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:41054 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727539AbfLPUsW (ORCPT ); Mon, 16 Dec 2019 15:48:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576529302; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Dznikfzn+n4WX4926tiKNygB6iX1YlaEs/0YdUiJxdA=; b=FzPSZZR3GUMf2K+z7Zw2QA5KFlhZJiyH/IcqTvVNehhY9SmFu61xIaVkaBlz9BGZi4VQOS RO6BNVdTvkn4RcVTPcTnsMb5IEjMGRVpD53OqjHJaV3023SCSb8qG4NgHASfusH6BOI+pR YfSGTATomzPNvOat6DcdIj4NRxJukRc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-63-ZsCK1exoNFqIWFgq7Whmzw-1; Mon, 16 Dec 2019 15:48:20 -0500 X-MC-Unique: ZsCK1exoNFqIWFgq7Whmzw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6D5B28E10CF; Mon, 16 Dec 2019 20:48:18 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-117.ams2.redhat.com [10.36.116.117]) by smtp.corp.redhat.com (Postfix) with ESMTP id B9BA65D9C9; Mon, 16 Dec 2019 20:48:15 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, maz@kernel.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org Cc: drjones@redhat.com, andrew.murray@arm.com, andre.przywara@arm.com, peter.maydell@linaro.org, alexandru.elisei@arm.com Subject: [kvm-unit-tests PATCH 03/10] arm: pmu: Add a pmu struct Date: Mon, 16 Dec 2019 21:47:50 +0100 Message-Id: <20191216204757.4020-4-eric.auger@redhat.com> In-Reply-To: <20191216204757.4020-1-eric.auger@redhat.com> References: <20191216204757.4020-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This struct aims at storing information potentially used by all tests such as the pmu version, the read-only part of the PMCR, the number of implemented event counters, ... Signed-off-by: Eric Auger Reviewed-by: Andre Przywara --- arm/pmu.c | 30 +++++++++++++++++++++++++----- 1 file changed, 25 insertions(+), 5 deletions(-) diff --git a/arm/pmu.c b/arm/pmu.c index e5e012d..d24857e 100644 --- a/arm/pmu.c +++ b/arm/pmu.c @@ -33,7 +33,14 @@ #define NR_SAMPLES 10 -static unsigned int pmu_version; +struct pmu { + unsigned int version; + unsigned int nb_implemented_counters; + uint32_t pmcr_ro; +}; + +static struct pmu pmu; + #if defined(__arm__) #define ID_DFR0_PERFMON_SHIFT 24 #define ID_DFR0_PERFMON_MASK 0xf @@ -265,7 +272,7 @@ static bool check_cpi(int cpi) static void pmccntr64_test(void) { #ifdef __arm__ - if (pmu_version == 0x3) { + if (pmu.version == 0x3) { if (ERRATA(9e3f7a296940)) { write_sysreg(0xdead, PMCCNTR64); report(read_sysreg(PMCCNTR64) == 0xdead, "pmccntr64"); @@ -278,9 +285,22 @@ static void pmccntr64_test(void) /* Return FALSE if no PMU found, otherwise return TRUE */ static bool pmu_probe(void) { - pmu_version = get_pmu_version(); - report_info("PMU version: %d", pmu_version); - return pmu_version != 0 && pmu_version != 0xf; + uint32_t pmcr; + + pmu.version = get_pmu_version(); + report_info("PMU version: %d", pmu.version); + + if (pmu.version == 0 || pmu.version == 0xF) + return false; + + pmcr = get_pmcr(); + pmu.pmcr_ro = pmcr & 0xFFFFFF80; + pmu.nb_implemented_counters = + (pmcr >> PMU_PMCR_N_SHIFT) & PMU_PMCR_N_MASK; + report_info("Implements %d event counters", + pmu.nb_implemented_counters); + + return true; } int main(int argc, char *argv[])