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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 A63C7C3A5A6 for ; Thu, 29 Aug 2019 21:20:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 80A34233FF for ; Thu, 29 Aug 2019 21:20:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727919AbfH2VUR (ORCPT ); Thu, 29 Aug 2019 17:20:17 -0400 Received: from mga07.intel.com ([134.134.136.100]:9707 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726526AbfH2VUR (ORCPT ); Thu, 29 Aug 2019 17:20:17 -0400 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Aug 2019 14:20:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,445,1559545200"; d="scan'208";a="186097946" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.137]) by orsmga006.jf.intel.com with ESMTP; 29 Aug 2019 14:20:17 -0700 Received: by tassilo.localdomain (Postfix, from userid 1000) id EDB1730121D; Thu, 29 Aug 2019 14:20:16 -0700 (PDT) Date: Thu, 29 Aug 2019 14:20:16 -0700 From: Andi Kleen To: Luwei Kang Cc: pbonzini@redhat.com, rkrcmar@redhat.com, sean.j.christopherson@intel.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC v1 3/9] KVM: x86: Implement MSR_IA32_PEBS_ENABLE read/write emulation Message-ID: <20190829212016.GV5447@tassilo.jf.intel.com> References: <1567056849-14608-1-git-send-email-luwei.kang@intel.com> <1567056849-14608-4-git-send-email-luwei.kang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1567056849-14608-4-git-send-email-luwei.kang@intel.com> User-Agent: Mutt/1.12.0 (2019-05-25) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org > + case MSR_IA32_PEBS_ENABLE: > + if (pmu->pebs_enable == data) > + return 0; > + if (!(data & pmu->pebs_enable_mask) && > + (data & MSR_IA32_PEBS_OUTPUT_MASK) == > + MSR_IA32_PEBS_OUTPUT_PT) { > + pebs_enable_changed(pmu, data); > + return 0; > + } Need #GP for bad values