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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 443B8C2BA19 for ; Wed, 15 Apr 2020 17:56:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F7382084D for ; Wed, 15 Apr 2020 17:56:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2411517AbgDOR4h (ORCPT ); Wed, 15 Apr 2020 13:56:37 -0400 Received: from mga18.intel.com ([134.134.136.126]:30605 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2440971AbgDORz2 (ORCPT ); Wed, 15 Apr 2020 13:55:28 -0400 IronPort-SDR: GeDD2N3Y/Yzaz+6FAwdmx16qDu87+sO+ZGwnmsYFfhypTB09f+Ow7jHpY/afu3oVU8WfZw2qSl rAn5BtyWJSnw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2020 10:55:24 -0700 IronPort-SDR: ogea85NK6Gbmxvg/UmpwMxjLZYQ2b7YqxPeCM176mN4a/z29wRpR93EzGOj0Zm12fkn4ltPylZ rFXk6zAMvtOA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,387,1580803200"; d="scan'208";a="332567343" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.202]) by orsmga001.jf.intel.com with ESMTP; 15 Apr 2020 10:55:23 -0700 From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xiaoyao Li Subject: [PATCH v2 03/10] KVM: nVMX: Move VM-Fail check out of nested_vmx_exit_reflected() Date: Wed, 15 Apr 2020 10:55:12 -0700 Message-Id: <20200415175519.14230-4-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200415175519.14230-1-sean.j.christopherson@intel.com> References: <20200415175519.14230-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check for VM-Fail on nested VM-Enter in nested_vmx_reflect_vmexit() in preparation for separating nested_vmx_exit_reflected() into separate "L0 wants exit exit" and "L1 wants the exit" helpers. Explicitly set exit_intr_info and exit_qual to zero instead of reading them from vmcs02, as they are invalid on VM-Fail (and thankfully ignored by nested_vmx_vmexit() for nested VM-Fail). Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/nested.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index afc8c3538ab3..cb7fd78ad9da 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -5652,15 +5652,6 @@ static bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason) struct vcpu_vmx *vmx = to_vmx(vcpu); struct vmcs12 *vmcs12 = get_vmcs12(vcpu); - WARN_ON_ONCE(vmx->nested.nested_run_pending); - - if (unlikely(vmx->fail)) { - trace_kvm_nested_vmenter_failed( - "hardware VM-instruction error: ", - vmcs_read32(VM_INSTRUCTION_ERROR)); - return true; - } - trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason, vmcs_readl(EXIT_QUALIFICATION), vmx->idt_vectoring_info, @@ -5819,7 +5810,23 @@ static bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason) */ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason) { - u32 exit_intr_info; + struct vcpu_vmx *vmx = to_vmx(vcpu); + u32 exit_intr_info, exit_qual; + + WARN_ON_ONCE(vmx->nested.nested_run_pending); + + /* + * Late nested VM-Fail shares the same flow as nested VM-Exit since KVM + * has already loaded L2's state. + */ + if (unlikely(vmx->fail)) { + trace_kvm_nested_vmenter_failed( + "hardware VM-instruction error: ", + vmcs_read32(VM_INSTRUCTION_ERROR)); + exit_intr_info = 0; + exit_qual = 0; + goto reflect_vmexit; + } if (!nested_vmx_exit_reflected(vcpu, exit_reason)) return false; @@ -5840,9 +5847,10 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason) vmcs12->vm_exit_intr_error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); } + exit_qual = vmcs_readl(EXIT_QUALIFICATION); - nested_vmx_vmexit(vcpu, exit_reason, exit_intr_info, - vmcs_readl(EXIT_QUALIFICATION)); +reflect_vmexit: + nested_vmx_vmexit(vcpu, exit_reason, exit_intr_info, exit_qual); return true; } -- 2.26.0