Message ID | 20220622192710.2547152-10-pbonzini@redhat.com |
---|---|
State | Accepted |
Headers | show
Return-Path: <kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=ztPfXboP; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=NpCP9LBS; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=<UNKNOWN>) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4LStgh5H34z9sGP for <incoming@patchwork.ozlabs.org>; Thu, 23 Jun 2022 05:27:28 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1LuoeDJTQMREjE62xjpF1C4kEosWpZYT4r1hnIdzV5Q=; b=ztPfXboPn9LRN8 2qO3oG3bcYHFWzA78ldMUhdvu8vZ798qOc+3p+7nR2LaWlWb1Gef14+LYXrX0PXeXVw02GUZhelcT aZmgkh/89GJe6pLSffLgVqcQnyPNBL3dLPrCpOZIOM+98csIFZAePy0nNrwUKg2ctkaRMIua8ZIRw gUD/6deTYu841YMFULieMTmXWxUn9ZW4KE/xwn8P6qJwcE10oCKn2sH3GE0i3SvAR8WOICv+Ydk9K TR5pMne4G+5H6Nt5fhytP91xDKyB+27zDihCevJ4Low3rCnijt4rIjAxdRvM9+2pkqJj5GpLRZvKb aweO4HTMC2IBW6XiKfmg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o460a-00C5TH-Qr; Wed, 22 Jun 2022 19:27:24 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o460V-00C5Ma-MF for kvm-riscv@lists.infradead.org; Wed, 22 Jun 2022 19:27:22 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655926038; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=F73ZQSpJXAcM6JUMGTWxTim9jEMxT3dE24kf7MSiY/U=; b=NpCP9LBSfwF/eUPjn8OozMRG7UEZKILIH5RbpLTJtEuKHdDt7I2ZxgvCb1k9KzDjWSiguv CfMvrxxxnEks8d6dmI1JKOfzmjmp57SZ3bQeDG1AhpSUofhlyNhLyEkp4LYa4N9exZvJhd Pugdq1basu4Fc6G+i/Dn/z/z1VpLrtw= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-88-MEOckTHDNae0HiQ4MeKbbw-1; Wed, 22 Jun 2022 15:27:15 -0400 X-MC-Unique: MEOckTHDNae0HiQ4MeKbbw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AC726294EDC2; Wed, 22 Jun 2022 19:27:14 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 562ED1121314; Wed, 22 Jun 2022 19:27:14 +0000 (UTC) From: Paolo Bonzini <pbonzini@redhat.com> To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: maz@kernel.org, anup@brainfault.org, seanjc@google.com, bgardon@google.com, peterx@redhat.com, maciej.szmigiero@oracle.com, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, pfeiner@google.com, jiangshanlai@gmail.com, dmatlack@google.com Subject: [PATCH v7 09/23] KVM: x86/mmu: Move guest PT write-protection to account_shadowed() Date: Wed, 22 Jun 2022 15:26:56 -0400 Message-Id: <20220622192710.2547152-10-pbonzini@redhat.com> In-Reply-To: <20220622192710.2547152-1-pbonzini@redhat.com> References: <20220622192710.2547152-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220622_122719_837692_3709C993 X-CRM114-Status: GOOD ( 12.00 ) X-Spam-Score: -1.1 (-) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: From: David Matlack <dmatlack@google.com> Move the code that write-protects newly-shadowed guest page tables into account_shadowed(). This avoids a extra gfn-to-memslot lookup and is a more logical place for this code to live. 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Series |
KVM: Extend Eager Page Splitting to the shadow MMU
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diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index bd45364bf465..2602c3642f23 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -766,6 +766,9 @@ static void account_shadowed(struct kvm *kvm, struct kvm_mmu_page *sp) KVM_PAGE_TRACK_WRITE); kvm_mmu_gfn_disallow_lpage(slot, gfn); + + if (kvm_mmu_slot_gfn_write_protect(kvm, slot, gfn, PG_LEVEL_4K)) + kvm_flush_remote_tlbs_with_address(kvm, gfn, 1); } void account_huge_nx_page(struct kvm *kvm, struct kvm_mmu_page *sp) @@ -2072,11 +2075,8 @@ static struct kvm_mmu_page *kvm_mmu_alloc_shadow_page(struct kvm_vcpu *vcpu, sp->gfn = gfn; sp->role = role; hlist_add_head(&sp->hash_link, sp_list); - if (sp_has_gptes(sp)) { + if (sp_has_gptes(sp)) account_shadowed(vcpu->kvm, sp); - if (role.level == PG_LEVEL_4K && kvm_vcpu_write_protect_gfn(vcpu, gfn)) - kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn, 1); - } return sp; }