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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 89D75C3F364 for ; Thu, 27 Feb 2020 14:30:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5F2E021D7E for ; Thu, 27 Feb 2020 14:30:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582813804; bh=mPMix2JA2/oqsO55oOsQRDw2ekG+Oe5xZNLGprvdUu8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0ODRtihc9C1F2WLHW0GXc8EkhgwuaNHBewmvJbhSb/wJ1Q8bup1WdUE0g/ZKg3vyo 8W1CpGRTar8PZ3SLTbVCZOoBVCU2EpUOyBjK1DJccZqo9a0PnUQOYWARSNk+cq2ZRj crMEqFitdT3wS66zLeLD2MgKdXqVz1z86vrn0CHg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388067AbgB0OaD (ORCPT ); Thu, 27 Feb 2020 09:30:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:42020 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733238AbgB0OFW (ORCPT ); Thu, 27 Feb 2020 09:05:22 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8866C21D7E; Thu, 27 Feb 2020 14:05:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812322; bh=mPMix2JA2/oqsO55oOsQRDw2ekG+Oe5xZNLGprvdUu8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CMDMibbN3/7tIkPO9YgqD4qFPYhHv2KaLAwvAFqCF/vMY+36ceinpho9ZsS6XT8a1 EKA4gxUezTDbb2FXar8nGvnoIC6MZNdzrUDgBVnHpx4VOvEvAhIEHHDr5urYwdg21+ q+FDOS2yvHcvZOP9F3/0YIQN/CtSQf40euj+/ecc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oliver Upton , Vitaly Kuznetsov , Paolo Bonzini Subject: [PATCH 4.19 71/97] KVM: nVMX: Refactor IO bitmap checks into helper function Date: Thu, 27 Feb 2020 14:37:19 +0100 Message-Id: <20200227132226.071661518@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132214.553656188@linuxfoundation.org> References: <20200227132214.553656188@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oliver Upton commit e71237d3ff1abf9f3388337cfebf53b96df2020d upstream. Checks against the IO bitmap are useful for both instruction emulation and VM-exit reflection. Refactor the IO bitmap checks into a helper function. Signed-off-by: Oliver Upton Reviewed-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/vmx.c | 40 +++++++++++++++++++++++++++------------- 1 file changed, 27 insertions(+), 13 deletions(-) --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5725,6 +5725,26 @@ static bool cs_ss_rpl_check(struct kvm_v (ss.selector & SEGMENT_RPL_MASK)); } +static bool nested_vmx_check_io_bitmaps(struct kvm_vcpu *vcpu, + unsigned int port, int size); +static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu, + struct vmcs12 *vmcs12) +{ + unsigned long exit_qualification; + unsigned int port; + int size; + + if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) + return nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING); + + exit_qualification = vmcs_readl(EXIT_QUALIFICATION); + + port = exit_qualification >> 16; + size = (exit_qualification & 7) + 1; + + return nested_vmx_check_io_bitmaps(vcpu, port, size); +} + /* * Check if guest state is valid. Returns true if valid, false if * not. @@ -9469,23 +9489,17 @@ static int (*const kvm_vmx_exit_handlers static const int kvm_vmx_max_exit_handlers = ARRAY_SIZE(kvm_vmx_exit_handlers); -static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu, - struct vmcs12 *vmcs12) +/* + * Return true if an IO instruction with the specified port and size should cause + * a VM-exit into L1. + */ +bool nested_vmx_check_io_bitmaps(struct kvm_vcpu *vcpu, unsigned int port, + int size) { - unsigned long exit_qualification; + struct vmcs12 *vmcs12 = get_vmcs12(vcpu); gpa_t bitmap, last_bitmap; - unsigned int port; - int size; u8 b; - if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) - return nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING); - - exit_qualification = vmcs_readl(EXIT_QUALIFICATION); - - port = exit_qualification >> 16; - size = (exit_qualification & 7) + 1; - last_bitmap = (gpa_t)-1; b = -1;