From patchwork Thu Oct 1 19:47:21 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christopher Covington X-Patchwork-Id: 7311121 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1AE729F302 for ; Thu, 1 Oct 2015 19:47:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3FD4C207A6 for ; Thu, 1 Oct 2015 19:47:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E1B9207A9 for ; Thu, 1 Oct 2015 19:47:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754210AbbJATre (ORCPT ); Thu, 1 Oct 2015 15:47:34 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:41710 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753120AbbJATre (ORCPT ); Thu, 1 Oct 2015 15:47:34 -0400 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id AEA5A141949; Thu, 1 Oct 2015 19:47:33 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 9D1F8141947; Thu, 1 Oct 2015 19:47:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from keeshans.qualcomm.com (rrcs-67-52-130-30.west.biz.rr.com [67.52.130.30]) (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: cov@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 60F59141946; Thu, 1 Oct 2015 19:47:32 +0000 (UTC) From: Christopher Covington To: drjones@redhat.com, qemu-devel@nongnu.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: shannon.zhao@linaro.org, Christopher Covington Subject: [PATCH] arm: Add PMU test Date: Thu, 1 Oct 2015 15:47:21 -0400 Message-Id: <1443728841-10501-1-git-send-email-cov@codeaurora.org> X-Mailer: git-send-email 1.8.1.1 X-Virus-Scanned: ClamAV using ClamSMTP Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Beginning with just a read of the control register, add plumbing for testing the ARM Performance Monitors Unit (PMU). Signed-off-by: Christopher Covington --- arm/pmu.c | 31 +++++++++++++++++++++++++++++++ arm/unittests.cfg | 5 +++++ config/config-arm-common.mak | 4 +++- 3 files changed, 39 insertions(+), 1 deletion(-) create mode 100644 arm/pmu.c diff --git a/arm/pmu.c b/arm/pmu.c new file mode 100644 index 0000000..b1e3c7a --- /dev/null +++ b/arm/pmu.c @@ -0,0 +1,31 @@ +#include "libcflat.h" + +union pmcr_el0 { + struct { + unsigned int implementor:8; + unsigned int identification_code:8; + unsigned int num_counters:5; + unsigned int zeros:4; + unsigned int cycle_counter_long:1; + unsigned int cycle_counter_disable_when_prohibited:1; + unsigned int event_counter_export:1; + unsigned int cycle_counter_clock_divider:1; + unsigned int cycle_counter_reset:1; + unsigned int event_counter_reset:1; + unsigned int enable:1; + } split; + uint32_t full; +}; + +int main() +{ + union pmcr_el0 pmcr; + + asm volatile("mrs %0, pmcr_el0\n" : "=r" (pmcr)); + + printf("PMU implementor: 0x%x\n", pmcr.split.implementor); + printf("Identification code: 0x%x\n", pmcr.split.identification_code); + printf("Event counters: %d\n", pmcr.split.num_counters); + + return report_summary(); +} diff --git a/arm/unittests.cfg b/arm/unittests.cfg index e068a0c..d3deb6a 100644 --- a/arm/unittests.cfg +++ b/arm/unittests.cfg @@ -35,3 +35,8 @@ file = selftest.flat smp = `getconf _NPROCESSORS_CONF` extra_params = -append 'smp' groups = selftest + +# Test PMU support +[pmu] +file = pmu.flat +groups = pmu diff --git a/config/config-arm-common.mak b/config/config-arm-common.mak index 698555d..b34d04c 100644 --- a/config/config-arm-common.mak +++ b/config/config-arm-common.mak @@ -11,7 +11,8 @@ endif tests-common = \ $(TEST_DIR)/selftest.flat \ - $(TEST_DIR)/spinlock-test.flat + $(TEST_DIR)/spinlock-test.flat \ + $(TEST_DIR)/pmu.flat all: test_cases @@ -70,3 +71,4 @@ test_cases: $(generated_files) $(tests-common) $(tests) $(TEST_DIR)/selftest.elf: $(cstart.o) $(TEST_DIR)/selftest.o $(TEST_DIR)/spinlock-test.elf: $(cstart.o) $(TEST_DIR)/spinlock-test.o +$(TEST_DIR)/pmu.elf: $(cstart.o) $(TEST_DIR)/pmu.o