From nobody Wed Sep 17 10:57:10 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D883C10F1B for ; Wed, 21 Dec 2022 22:24:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234951AbiLUWYc (ORCPT ); Wed, 21 Dec 2022 17:24:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234897AbiLUWYY (ORCPT ); Wed, 21 Dec 2022 17:24:24 -0500 Received: from mail-pf1-x44a.google.com (mail-pf1-x44a.google.com [IPv6:2607:f8b0:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1961A27164 for ; Wed, 21 Dec 2022 14:24:24 -0800 (PST) Received: by mail-pf1-x44a.google.com with SMTP id k22-20020aa79736000000b0057f3577fdbaso475pfg.8 for ; Wed, 21 Dec 2022 14:24:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=aKlgYMYIrlGLbMYP963Rt32Noqo2pCtoxK8D34uyWJ4=; b=PWqhNCgkLNsL4LTq6n3P2N/wL2IC5fNtKlHcljZPjv1KMJIXNnu+jM/wiOaUfvSQzQ sqxmogZSTOlLja/osRpS7Ow8EfzSUYnreoaLWkkFdbixfiBmjccx0+KswydFi9OPd7G+ ufafOm2aNUYdbkAWCv2FGT5m/chD2Utam3lq9+XJO5/Q1b+hNSmrMeQga388z7ynT7v8 NX7DKNfpSeQMnVeRYugzoXNHWHSvxsw+I6ma6X+E6cBtDFf2MAyzy1YNcTGk8tmCzLNd ney/iJw+QhWYPcoct/qe9KDj8ngJbHLXsqU23YGjejcPJ/Eqxv/IM84tu17ag52e0e8x 5slQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=aKlgYMYIrlGLbMYP963Rt32Noqo2pCtoxK8D34uyWJ4=; b=jeRoZiXDXqNratWFstsbBBv3NvCxI8PDSbm6Xyy9Vl/rIiLhWN2Hea9a1+bjXaHLBv xygDM2wUjMhdPc1zaOxaGOl9UZIUoEZsS6sHMlByDPc7esREnc6o7dRRrYldTfT3vBcy ydq58iYtAMt+7qsR9UQHhJhBhOyA8FKmuWFI967Qiai49ze3L4ktbOO2OfL6Jq7i1F60 pQpHml0qOOBjRsrsyEq/TP+dwbRRMW/RnKPSc5228l0A5DFbVQH2F5Q4mI4FcAqtlBoc nHPq7uGL/Zo/A7M3czS8zrIyR2YtkPfDEWIHiBkNKO2WJ51/Jtbf4jFZLgzqPelkdO4+ FdqQ== X-Gm-Message-State: AFqh2kpLpnKK8+mRXk7LERwvjers7Fk+O+kT06HujJhyWtZDiKxXDTbO xVXRCbRef36i3eWZ4Xg2SmZcWp/x00R8hpRe8ZteC7D8JIzGgfXBNPZKdIkTx/gp+dior+qgKFn 8jsiZaRCBcZCGtyfrAbaU60dYjbPDGQtumNxZot+lg6iUnIUKvJ0yeW4D3/422x64iis3gr3L X-Google-Smtp-Source: AMrXdXtezmpm9/qcQiNZToPZHhHL5FScFsYx6ESyDed8IH5dss9kLF5PXnxx3ct4s9IE+lK/su3Wnrko61my X-Received: from sweer.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:e45]) (user=bgardon job=sendgmr) by 2002:a17:90a:6845:b0:219:2bc2:f71e with SMTP id e5-20020a17090a684500b002192bc2f71emr274766pjm.142.1671661463529; Wed, 21 Dec 2022 14:24:23 -0800 (PST) Date: Wed, 21 Dec 2022 22:24:05 +0000 In-Reply-To: <20221221222418.3307832-1-bgardon@google.com> Mime-Version: 1.0 References: <20221221222418.3307832-1-bgardon@google.com> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog Message-ID: <20221221222418.3307832-2-bgardon@google.com> Subject: [RFC 01/14] KVM: x86/MMU: Add shadow_mmu.(c|h) From: Ben Gardon To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Peter Xu , Sean Christopherson , David Matlack , Vipin Sharma , Nagareddy Reddy , Ben Gardon Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" As a first step to splitting the Shadow MMU out of KVM MMU common code, add separate files for it with some of the boilerplate and includes the Shadow MMU will need. No functional change intended. Signed-off-by: Ben Gardon --- arch/x86/kvm/Makefile | 2 +- arch/x86/kvm/mmu/mmu.c | 1 + arch/x86/kvm/mmu/shadow_mmu.c | 21 +++++++++++++++++++++ arch/x86/kvm/mmu/shadow_mmu.h | 8 ++++++++ 4 files changed, 31 insertions(+), 1 deletion(-) create mode 100644 arch/x86/kvm/mmu/shadow_mmu.c create mode 100644 arch/x86/kvm/mmu/shadow_mmu.h diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index 80e3fe184d17..d6e94660b006 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -12,7 +12,7 @@ include $(srctree)/virt/kvm/Makefile.kvm kvm-y +=3D x86.o emulate.o i8259.o irq.o lapic.o \ i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \ hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \ - mmu/spte.o + mmu/spte.o mmu/shadow_mmu.o =20 ifdef CONFIG_HYPERV kvm-y +=3D kvm_onhyperv.o diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 4736d7849c60..07b99a7ce830 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -20,6 +20,7 @@ #include "mmu.h" #include "mmu_internal.h" #include "tdp_mmu.h" +#include "shadow_mmu.h" #include "x86.h" #include "kvm_cache_regs.h" #include "smm.h" diff --git a/arch/x86/kvm/mmu/shadow_mmu.c b/arch/x86/kvm/mmu/shadow_mmu.c new file mode 100644 index 000000000000..7bce5ec52b2e --- /dev/null +++ b/arch/x86/kvm/mmu/shadow_mmu.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KVM Shadow MMU + * + * This file implements the Shadow MMU: the KVM MMU implementation which h= as + * developed organically from hardware which did not have second level pag= ing, + * and so used "shadow paging" to virtualize guest memory. The Shadow MMU = is + * an alternative to the TDP MMU which only supports hardware with Two + * Dimentional Paging. (e.g. EPT on Intel or NPT on AMD CPUs.) Note that t= he + * Shadow MMU also supports TDP, it's just less scalable. The Shadow and T= DP + * MMUs can cooperate to support nested virtualization on hardware with TD= P. + */ +#include "mmu.h" +#include "mmu_internal.h" +#include "mmutrace.h" +#include "shadow_mmu.h" +#include "spte.h" + +#include +#include +#include diff --git a/arch/x86/kvm/mmu/shadow_mmu.h b/arch/x86/kvm/mmu/shadow_mmu.h new file mode 100644 index 000000000000..719b10f6c403 --- /dev/null +++ b/arch/x86/kvm/mmu/shadow_mmu.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __KVM_X86_MMU_SHADOW_MMU_H +#define __KVM_X86_MMU_SHADOW_MMU_H + +#include + +#endif /* __KVM_X86_MMU_SHADOW_MMU_H */ --=20 2.39.0.314.g84b9a713c41-goog