From patchwork Fri Jul 16 08:53:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhu, Lingshan" X-Patchwork-Id: 12381777 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 C9BAFC07E95 for ; Fri, 16 Jul 2021 08:54:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B4DDD613DA for ; Fri, 16 Jul 2021 08:54:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239222AbhGPI5o (ORCPT ); Fri, 16 Jul 2021 04:57:44 -0400 Received: from mga07.intel.com ([134.134.136.100]:48008 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238546AbhGPI5g (ORCPT ); Fri, 16 Jul 2021 04:57:36 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10046"; a="274526384" X-IronPort-AV: E=Sophos;i="5.84,244,1620716400"; d="scan'208";a="274526384" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jul 2021 01:54:41 -0700 X-IronPort-AV: E=Sophos;i="5.84,244,1620716400"; d="scan'208";a="495983996" Received: from vmm_a4_icx.sh.intel.com (HELO localhost.localdomain) ([10.239.53.245]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jul 2021 01:54:37 -0700 From: Zhu Lingshan To: peterz@infradead.org, pbonzini@redhat.com Cc: bp@alien8.de, seanjc@google.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, kan.liang@linux.intel.com, ak@linux.intel.com, wei.w.wang@intel.com, eranian@google.com, liuxiangdong5@huawei.com, linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org, like.xu.linux@gmail.com, boris.ostrvsky@oracle.com, Like Xu , Zhu Lingshan Subject: [PATCH V8 10/18] KVM: x86/pmu: Adjust precise_ip to emulate Ice Lake guest PDIR counter Date: Fri, 16 Jul 2021 16:53:17 +0800 Message-Id: <20210716085325.10300-11-lingshan.zhu@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210716085325.10300-1-lingshan.zhu@intel.com> References: <20210716085325.10300-1-lingshan.zhu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Like Xu The PEBS-PDIR facility on Ice Lake server is supported on IA31_FIXED0 only. If the guest configures counter 32 and PEBS is enabled, the PEBS-PDIR facility is supposed to be used, in which case KVM adjusts attr.precise_ip to 3 and request host perf to assign the exactly requested counter or fail. The CPU model check is also required since some platforms may place the PEBS-PDIR facility in another counter index. Signed-off-by: Like Xu Signed-off-by: Zhu Lingshan --- arch/x86/kvm/pmu.c | 2 ++ arch/x86/kvm/pmu.h | 7 +++++++ 2 files changed, 9 insertions(+) diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index d76b0a5d80d7..b907aba35ff3 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -153,6 +153,8 @@ static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type, * could possibly care here is unsupported and needs changes. */ attr.precise_ip = 1; + if (x86_match_cpu(vmx_icl_pebs_cpu) && pmc->idx == 32) + attr.precise_ip = 3; } if (pebs || intr) ovf = kvm_perf_overflow_intr; diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h index 67e753edfa22..1af86ae1d3f2 100644 --- a/arch/x86/kvm/pmu.h +++ b/arch/x86/kvm/pmu.h @@ -4,6 +4,8 @@ #include +#include + #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu) #define pmu_to_vcpu(pmu) (container_of((pmu), struct kvm_vcpu, arch.pmu)) #define pmc_to_pmu(pmc) (&(pmc)->vcpu->arch.pmu) @@ -16,6 +18,11 @@ #define VMWARE_BACKDOOR_PMC_APPARENT_TIME 0x10002 #define MAX_FIXED_COUNTERS 3 +static const struct x86_cpu_id vmx_icl_pebs_cpu[] = { + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D, NULL), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, NULL), + {} +}; struct kvm_event_hw_type_mapping { u8 eventsel;