Message ID | 20190809160047.8319-42-alazar@bitdefender.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <owner-linux-mm@kvack.org> 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 9ED291399 for <patchwork-linux-mm@patchwork.kernel.org>; Fri, 9 Aug 2019 16:02:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8AF2E20072 for <patchwork-linux-mm@patchwork.kernel.org>; Fri, 9 Aug 2019 16:02:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7EF95200DF; Fri, 9 Aug 2019 16:02:59 +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=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1363C20072 for <patchwork-linux-mm@patchwork.kernel.org>; Fri, 9 Aug 2019 16:02:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BDDAC6B0285; Fri, 9 Aug 2019 12:01:15 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id B978D6B0286; Fri, 9 Aug 2019 12:01:15 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9A0716B0287; Fri, 9 Aug 2019 12:01:15 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by kanga.kvack.org (Postfix) with ESMTP id 4A8296B0285 for <linux-mm@kvack.org>; Fri, 9 Aug 2019 12:01:15 -0400 (EDT) Received: by mail-wr1-f71.google.com with SMTP id b1so46834484wru.4 for <linux-mm@kvack.org>; Fri, 09 Aug 2019 09:01:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:from:to:cc :subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=sjTbtBNVc706F6PJIxdpB0VaL0+XOcEWscuac7rNd0s=; b=LtCRAec2lnvSeUlS26RRmEDmt/reIe8KXBooPWXNiTlsTI7G3eAjKWlymVaEfDYDcv OKsbaPfTYdG14lqZOAsr6yRfC9FblhWksFct7Ton5r7SNiQX8i3lWElwq3TCWH/X9KlH 5szcetUjs0RqREVN/NM/7+OJeX5XjJO5mahh6sg6HtD8Ye0Iyy/jExewGOd0zAU9F6I6 +csmJtGkJzwiJXQRttTyMkuL9dfXgYzGtKO8RhpR3d6ilQTP3WpgHtP/ZIFEEuhLE1vf zaJz+EnCak2gd1w9PdAFZOEd4oZyCH66+15AfJ4uUOiQwGY4JkTIYM/5v7TM+UvxDFbW QhEg== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) smtp.mailfrom=alazar@bitdefender.com X-Gm-Message-State: APjAAAXko3yjNVhk8HwkgtjpvrVfHBy2eFMYXa5Q5HOr8pQtTPbhW9Q0 Xl7RWQVif+8f41GYiLNyXJB2FwODeXNSOQVykHEt94u0Eh9+/a1xpKVD9bQ4MbqjN1cgTr3/K+b 9lut0Ddz+AZNHARgwvznaMIDAO8NIc0XoWCGAR1Ty3wZWhaknI69zWbSdEAfVGtPJnw== X-Received: by 2002:a05:600c:34a:: with SMTP id u10mr11393670wmd.43.1565366474906; Fri, 09 Aug 2019 09:01:14 -0700 (PDT) X-Google-Smtp-Source: APXvYqzGc2J4/Bwz9YCGoWYa4UKnINFEF4wNFmeJOA6QeAh9rz8O6yJ3m4q0w6BQl4IFvL0IQr0V X-Received: by 2002:a05:600c:34a:: with SMTP id u10mr11393516wmd.43.1565366473197; Fri, 09 Aug 2019 09:01:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1565366473; cv=none; d=google.com; s=arc-20160816; b=FJH5XRDaN/35YO8SDILv9NCGo3bNWpNszJS6YGeGC/sbZtc6Ibr6Wr2kXSmcBh+0+R 89D7pjJaXRY5vDcn/V6e0QzG4WaoTrePQiKtWS5FXk1mtoepZpIjBN26LX7wRkSWpaVW JAmHt5wMBVBZZgPZoWPqXmBZrGjpAhADEFFgKfzlTMNBIPFzSzsBelQjWOYDfizznVVz yemG6nX/8IqTp/QfqGOhwlfnXN+5mby+qK2E8pcVlmcdmzuC48ZQRbhqUH68s9ruxnsL pNw3XR/2FwAq1HzUw0Zd262ImVbZmg6OwF7/4v8IWzX/TWX/IhdmkNf4p5wwzhJVJk0o 2/hg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from; bh=sjTbtBNVc706F6PJIxdpB0VaL0+XOcEWscuac7rNd0s=; b=xmqdy6u+TkekLyRj65rej86rYeuojQp2inGlBUOlFuVNQbOi1WWQd5O8OXMU78FP1i P44fTJz6KI45fT1HnngC3eVqVrL+so9eiMUmg09Q8p1uZW51fdiXVcH8kLmW3pyzOXze 2xBbGO7wAmzu1PK74RD91mBUkYcs/kAmzmd7gmQjKf1m9raSaKJ+q1Bqkya92c5drx6u brYSY5wDK4Rp1SKRbN254yKBeYnK9PgSxVPLx2mJDP33OFRxuPmE/psG8E72Qsc59btf CRT1zVgNX2U+kpYQmp5qOZFl6cFLFPA1My1vWq0NIGjxciuBeLSr40Ph0iYgx7hnksLD gUNA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) smtp.mailfrom=alazar@bitdefender.com Received: from mx01.bbu.dsd.mx.bitdefender.com (mx01.bbu.dsd.mx.bitdefender.com. [91.199.104.161]) by mx.google.com with ESMTPS id p5si85828735wru.252.2019.08.09.09.01.13 for <linux-mm@kvack.org> (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Aug 2019 09:01:13 -0700 (PDT) Received-SPF: pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) client-ip=91.199.104.161; Authentication-Results: mx.google.com; spf=pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) smtp.mailfrom=alazar@bitdefender.com Received: from smtp.bitdefender.com (smtp02.buh.bitdefender.net [10.17.80.76]) by mx01.bbu.dsd.mx.bitdefender.com (Postfix) with ESMTPS id 9EECC3031EB6; Fri, 9 Aug 2019 19:01:12 +0300 (EEST) Received: from localhost.localdomain (unknown [89.136.169.210]) by smtp.bitdefender.com (Postfix) with ESMTPSA id 46431305B7A0; Fri, 9 Aug 2019 19:01:11 +0300 (EEST) From: =?utf-8?q?Adalbert_Laz=C4=83r?= <alazar@bitdefender.com> To: kvm@vger.kernel.org Cc: linux-mm@kvack.org, virtualization@lists.linux-foundation.org, Paolo Bonzini <pbonzini@redhat.com>, =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Tamas K Lengyel <tamas@tklengyel.com>, Mathieu Tarral <mathieu.tarral@protonmail.com>, =?utf-8?q?Samuel_Laur=C3=A9?= =?utf-8?q?n?= <samuel.lauren@iki.fi>, Patrick Colp <patrick.colp@oracle.com>, Jan Kiszka <jan.kiszka@siemens.com>, Stefan Hajnoczi <stefanha@redhat.com>, Weijiang Yang <weijiang.yang@intel.com>, Zhang@kvack.org, Yu C <yu.c.zhang@intel.com>, =?utf-8?q?Mihai_Don=C8=9Bu?= <mdontu@bitdefender.com>, =?utf-8?q?Adalbert_L?= =?utf-8?q?az=C4=83r?= <alazar@bitdefender.com> Subject: [RFC PATCH v6 41/92] KVM: MMU: Enable Lazy mode SPPT setup Date: Fri, 9 Aug 2019 18:59:56 +0300 Message-Id: <20190809160047.8319-42-alazar@bitdefender.com> In-Reply-To: <20190809160047.8319-1-alazar@bitdefender.com> References: <20190809160047.8319-1-alazar@bitdefender.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
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VM introspection
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expand
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diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index d59108a3ebbf..24222e3add91 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -4400,6 +4400,26 @@ check_hugepage_cache_consistency(struct kvm_vcpu *vcpu, gfn_t gfn, int level) return kvm_mtrr_check_gfn_range_consistency(vcpu, gfn, page_num); } +static int kvm_enable_spp_protection(struct kvm *kvm, u64 gfn) +{ + struct kvm_subpage spp_info = {0}; + struct kvm_memory_slot *slot; + + slot = gfn_to_memslot(kvm, gfn); + if (!slot) + return -EFAULT; + + spp_info.base_gfn = gfn; + spp_info.npages = 1; + + if (kvm_mmu_get_subpages(kvm, &spp_info, true) < 0) + return -EFAULT; + + if (spp_info.access_map[0] != FULL_SPP_ACCESS) + kvm_mmu_set_subpages(kvm, &spp_info, true); + + return 0; +} static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code, bool prefault) { @@ -4451,6 +4471,10 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code, if (likely(!force_pt_level)) transparent_hugepage_adjust(vcpu, &gfn, &pfn, &level); r = __direct_map(vcpu, write, map_writable, level, gfn, pfn, prefault); + + if (vcpu->kvm->arch.spp_active && level == PT_PAGE_TABLE_LEVEL) + kvm_enable_spp_protection(vcpu->kvm, gfn); + spin_unlock(&vcpu->kvm->mmu_lock); return r;