From patchwork Thu Jul 26 09:42:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luwei Kang X-Patchwork-Id: 10545499 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0E2E314E2 for ; Thu, 26 Jul 2018 09:44:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F19EE2AA44 for ; Thu, 26 Jul 2018 09:44:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E59962AD74; Thu, 26 Jul 2018 09:44:21 +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=ham 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 787482AA44 for ; Thu, 26 Jul 2018 09:44:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729345AbeGZLAV (ORCPT ); Thu, 26 Jul 2018 07:00:21 -0400 Received: from mga09.intel.com ([134.134.136.24]:3779 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729274AbeGZLAV (ORCPT ); Thu, 26 Jul 2018 07:00:21 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jul 2018 02:44:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,404,1526367600"; d="scan'208";a="75651628" Received: from unknown (HELO skx-d.bj.intel.com) ([10.238.154.68]) by fmsmga001.fm.intel.com with ESMTP; 26 Jul 2018 02:44:14 -0700 From: Luwei Kang To: kvm@vger.kernel.org Cc: x86@kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, thomas.lendacky@amd.com, bp@suse.de, konrad.wilk@oracle.com, mattst88@gmail.com, Janakarajan.Natarajan@amd.com, dwmw@amazon.co.uk, alexander.shishkin@linux.intel.com, songliubraving@fb.com, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, peterz@infradead.org, pbonzini@redhat.com, rkrcmar@redhat.com, david@redhat.com, bsd@redhat.com, marcorr@google.com, joro@8bytes.org, Luwei Kang Subject: [PATCH v12 09/12] KVM: x86: Introduce a function to initialize the PT configuration Date: Thu, 26 Jul 2018 17:42:59 +0800 Message-Id: <1532598182-10711-10-git-send-email-luwei.kang@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1532598182-10711-1-git-send-email-luwei.kang@intel.com> References: <1532598182-10711-1-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 | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 1a1568e..d7db186 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10999,6 +10999,74 @@ 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); + + /* Initialize and 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 otherwise + * will inject an #GP + */ + 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); @@ -11017,6 +11085,10 @@ 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)