From patchwork Mon May 14 10:57:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luwei Kang X-Patchwork-Id: 10397603 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 594BE600D0 for ; Mon, 14 May 2018 09:05:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 49A0328CCA for ; Mon, 14 May 2018 09:05:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3E2CD290D5; Mon, 14 May 2018 09:05:49 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DCB4928CCA for ; Mon, 14 May 2018 09:05:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752424AbeENJDh (ORCPT ); Mon, 14 May 2018 05:03:37 -0400 Received: from mga07.intel.com ([134.134.136.100]:60889 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752076AbeENJDe (ORCPT ); Mon, 14 May 2018 05:03:34 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 May 2018 02:03:34 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,399,1520924400"; d="scan'208";a="39701955" Received: from skx-d.bj.intel.com ([10.238.154.68]) by fmsmga008.fm.intel.com with ESMTP; 14 May 2018 02:03:30 -0700 From: Luwei Kang To: kvm@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, chao.p.peng@linux.intel.com, thomas.lendacky@amd.com, bp@suse.de, Kan.liang@intel.com, Janakarajan.Natarajan@amd.com, dwmw@amazon.co.uk, linux-kernel@vger.kernel.org, alexander.shishkin@linux.intel.com, peterz@infradead.org, mathieu.poirier@linaro.org, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, pbonzini@redhat.com, rkrcmar@redhat.com, david@redhat.com, bsd@redhat.com, yu.c.zhang@linux.intel.com, joro@8bytes.org, Luwei Kang Subject: [PATCH v8 09/12] KVM: x86: Introduce a function to initialize the PT configuration Date: Mon, 14 May 2018 18:57:09 +0800 Message-Id: <1526295432-20640-10-git-send-email-luwei.kang@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1526295432-20640-1-git-send-email-luwei.kang@intel.com> References: <1526295432-20640-1-git-send-email-luwei.kang@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Initialize the Intel PT configuration when cpuid update. Include cpuid inforamtion, rtit_ctl bit mask and the number of address ranges. Signed-off-by: Luwei Kang --- arch/x86/kvm/vmx.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index eb5f50a..5c321cd 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10413,6 +10413,71 @@ static void nested_vmx_cr_fixed1_bits_update(struct kvm_vcpu *vcpu) #undef cr4_fixed1_update } +static void update_intel_pt_cfg(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + struct kvm_cpuid_entry2 *best = NULL; + int i; + + for (i = 0; i < PT_CPUID_LEAVES; i++) { + best = kvm_find_cpuid_entry(vcpu, 0x14, i); + if (!best) + return; + vmx->pt_desc.caps[CPUID_EAX + i*PT_CPUID_REGS_NUM] = best->eax; + vmx->pt_desc.caps[CPUID_EBX + i*PT_CPUID_REGS_NUM] = best->ebx; + vmx->pt_desc.caps[CPUID_ECX + i*PT_CPUID_REGS_NUM] = best->ecx; + vmx->pt_desc.caps[CPUID_EDX + i*PT_CPUID_REGS_NUM] = best->edx; + } + + /* Get the number of configurable Address Ranges for filtering */ + vmx->pt_desc.addr_range = pt_cap_decode(vmx->pt_desc.caps, + PT_CAP_num_address_ranges); + + /* Clear the no dependency bits */ + vmx->pt_desc.ctl_bitmask = ~(RTIT_CTL_TRACEEN | RTIT_CTL_OS | + RTIT_CTL_USR | RTIT_CTL_TSC_EN | RTIT_CTL_DISRETC); + + /* If CPUID.(EAX=14H,ECX=0):EBX[0]=1 CR3Filter can be set */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_cr3_filtering)) + vmx->pt_desc.ctl_bitmask &= ~RTIT_CTL_CR3EN; + + /* + * If CPUID.(EAX=14H,ECX=0):EBX[1]=1 CYCEn, CycThresh and + * PSBFreq can be set + */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_psb_cyc)) + vmx->pt_desc.ctl_bitmask &= ~(RTIT_CTL_CYCLEACC | + RTIT_CTL_CYC_THRESH | RTIT_CTL_PSB_FREQ); + + /* + * If CPUID.(EAX=14H,ECX=0):EBX[3]=1 MTCEn BranchEn and + * MTCFreq can be set + */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_mtc)) + vmx->pt_desc.ctl_bitmask &= ~(RTIT_CTL_MTC_EN | + RTIT_CTL_BRANCH_EN | RTIT_CTL_MTC_RANGE); + + /* If CPUID.(EAX=14H,ECX=0):EBX[4]=1 FUPonPTW and PTWEn can be set */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_ptwrite)) + vmx->pt_desc.ctl_bitmask &= ~(RTIT_CTL_FUP_ON_PTW | + RTIT_CTL_PTW_EN); + + /* If CPUID.(EAX=14H,ECX=0):EBX[5]=1 PwrEvEn can be set */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_power_event_trace)) + vmx->pt_desc.ctl_bitmask &= ~RTIT_CTL_PWR_EVT_EN; + + /* If CPUID.(EAX=14H,ECX=0):ECX[0]=1 ToPA can be set */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_topa_output)) + vmx->pt_desc.ctl_bitmask &= ~RTIT_CTL_TOPA; + /* If CPUID.(EAX=14H,ECX=0):ECX[3]=1 FabircEn can be set */ + if (pt_cap_decode(vmx->pt_desc.caps, PT_CAP_output_subsys)) + vmx->pt_desc.ctl_bitmask &= ~RTIT_CTL_FABRIC_EN; + + /* unmask address range configure area */ + for (i = 0; i < vmx->pt_desc.addr_range; i++) + vmx->pt_desc.ctl_bitmask &= ~(0xf << (32 + i * 4)); +} + static void vmx_cpuid_update(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); @@ -10431,6 +10496,10 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) if (nested_vmx_allowed(vcpu)) nested_vmx_cr_fixed1_bits_update(vcpu); + + if (boot_cpu_has(X86_FEATURE_INTEL_PT) && + guest_cpuid_has(vcpu, X86_FEATURE_INTEL_PT)) + update_intel_pt_cfg(vcpu); } static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)