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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 6FE06C4BA0E for ; Wed, 26 Feb 2020 09:44:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 42FB224673 for ; Wed, 26 Feb 2020 09:44:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="rhDAbplK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727686AbgBZJop (ORCPT ); Wed, 26 Feb 2020 04:44:45 -0500 Received: from mail-pf1-f201.google.com ([209.85.210.201]:36687 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726494AbgBZJop (ORCPT ); Wed, 26 Feb 2020 04:44:45 -0500 Received: by mail-pf1-f201.google.com with SMTP id 6so1758273pfv.3 for ; Wed, 26 Feb 2020 01:44:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=PBRYnIoV16uqyH4JmWNsaFktK3dmGET/qpGByqmujow=; b=rhDAbplKaH64XrsJAmvMtnimK/aTADpfEVX3NKDL1B6aeVZ+3VhNR+mTrXm90edO9n jRVtaMzwDoEyBi6xOdPGFv8Cd2AEi8E9SOmhDvsUH9edYFs+29+z9Iz7ytafGfBv8RYM etIUL9uhMmhTyRIdbvVWtaRGs9EN4pCKUjcVJMyrzSRMsCA9HLDUHdm+99/5EtWWa4RM 9mH+5MOOJJay2phpDrdb6VZ7GmLd9EcPJ3KRcv9VJkcGTR2QEs6pY5UvCBD5f0UfGe5s 7HK3Z2oPV9PtaDluKp8SnIu6DAIDS1uWx++BQL+ua+wAHE+e7001UpG2539AVWbpAr/2 NpNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=PBRYnIoV16uqyH4JmWNsaFktK3dmGET/qpGByqmujow=; b=P9dPpOEbOkxgEp8oN0yWux1wuqRY1JB2yGj6JFLWcN8Jgdcj9MVlh1HeOj9L/WLuXD PrZY0Jsqf1BUNZP87yV3Q0LboLPmFXO42e67l3drCjgUD1A0OhOqT+3O1Ux5ZeV+/Q7l qqMFBHED5neH8IUwLCecV6ir6/MqpERDOnkrW6jZsDNL2kLAFVdocV2pibUkYtU8LE3U RB5N1ghjNLWkzAvCxj+TshGTiFFNuE9xYvAP5pr2JMR0alRSBNqGRC6uwAIL1PrtAMml c519N5vY2anoJQF2M8sx7S+lW+qX8W/lJVWQlGEzYl3WWIlH+frTxEYdHejaoyf0aLS0 JPGg== X-Gm-Message-State: APjAAAW9LtGUSiPrmkEmvrAnffOHfldDVXwUjdRaR1VSEcLfcKkPBVpV YalxEmV9S6vjZCBfuZ1+D2AprIY8i6gcEf89YhDCxSWdgpnHXCtBNuVwkcYy4/b+yJobZt7o9NT BadNhVJ/TjdzO4ngasyEHYydB7G7p54dF/sdLX8x8ul0+o48ifAgzuw== X-Google-Smtp-Source: APXvYqwybOsPdYGUOXUMeRRh5YOjbhUYwb73Qj59M7gQNeQjD1IJSJ84ir742XGN3L9E8FM10rGu2bmnNA== X-Received: by 2002:a65:40c8:: with SMTP id u8mr3040026pgp.188.1582710282232; Wed, 26 Feb 2020 01:44:42 -0800 (PST) Date: Wed, 26 Feb 2020 01:44:21 -0800 In-Reply-To: <20200226094433.210968-1-morbo@google.com> Message-Id: <20200226094433.210968-3-morbo@google.com> Mime-Version: 1.0 References: <20200226074427.169684-1-morbo@google.com> <20200226094433.210968-1-morbo@google.com> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog Subject: [kvm-unit-tests PATCH v2 1/7] x86: pmu: Test WRMSR on a running counter From: Bill Wendling To: kvm@vger.kernel.org Cc: oupton@google.com, pbonzini@redhat.com, drjones@redhat.com, Eric Hankland , Bill Wendling Content-Type: text/plain; charset="UTF-8" Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Eric Hankland Ensure that the value of the counter was successfully set to 0 after writing it while the counter was running. Signed-off-by: Eric Hankland Signed-off-by: Paolo Bonzini Signed-off-by: Bill Wendling --- x86/pmu.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/x86/pmu.c b/x86/pmu.c index a4e483b..c8096b8 100644 --- a/x86/pmu.c +++ b/x86/pmu.c @@ -420,6 +420,21 @@ static void check_rdpmc(void) report_prefix_pop(); } +static void check_running_counter_wrmsr(void) +{ + pmu_counter_t evt = { + .ctr = MSR_IA32_PERFCTR0, + .config = EVNTSEL_OS | EVNTSEL_USR | gp_events[1].unit_sel, + .count = 0, + }; + + start_event(&evt); + loop(); + wrmsr(MSR_IA32_PERFCTR0, 0); + stop_event(&evt); + report(evt.count < gp_events[1].min, "running counter wrmsr"); +} + int main(int ac, char **av) { struct cpuid id = cpuid(10); @@ -454,6 +469,7 @@ int main(int ac, char **av) check_counters_many(); check_counter_overflow(); check_gp_counter_cmask(); + check_running_counter_wrmsr(); return report_summary(); } -- 2.25.0.265.gbab2e86ba0-goog