From patchwork Thu Apr 21 05:12:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 12821083 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0980CC433EF for ; Thu, 21 Apr 2022 05:13:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0AD0189D39; Thu, 21 Apr 2022 05:13:22 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id A022B89B97 for ; Thu, 21 Apr 2022 05:13:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1650517999; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=onN0ZHZPa2j6tpDgsJt0Wzjm7hzuHqZyanl0pCWwqvQ=; b=LdDLhbOrjZfR6vHHIxaadkBLyqYtEO00yGBzUyk4bkG/AiJqnuwvZzDw+sQuC0181wsMNh cb0sYK4PC3MTbGy4xFI2VXsZgk39IA9/aSvAxGgwfXN/a9Arp0pJa/EZxY4qWCnvDv7JYv xc3vibJAj3qb10JUn8W/lXKU1+DXbok= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-588-n6ShaFpmO8GKtexO1bl7cw-1; Thu, 21 Apr 2022 01:13:15 -0400 X-MC-Unique: n6ShaFpmO8GKtexO1bl7cw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C7D40185A794; Thu, 21 Apr 2022 05:13:14 +0000 (UTC) Received: from localhost.localdomain (unknown [10.40.194.231]) by smtp.corp.redhat.com (Postfix) with ESMTP id 791B6145BA5A; Thu, 21 Apr 2022 05:13:09 +0000 (UTC) From: Maxim Levitsky To: kvm@vger.kernel.org Subject: [RFC PATCH v2 04/10] KVM: x86: mmu: tweak fast path for emulation of access to nested NPT pages Date: Thu, 21 Apr 2022 08:12:38 +0300 Message-Id: <20220421051244.187733-5-mlevitsk@redhat.com> In-Reply-To: <20220421051244.187733-1-mlevitsk@redhat.com> References: <20220421051244.187733-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wanpeng Li , David Airlie , dri-devel@lists.freedesktop.org, "H. Peter Anvin" , Joerg Roedel , x86@kernel.org, Maxim Levitsky , Ingo Molnar , Zhi Wang , Dave Hansen , intel-gfx@lists.freedesktop.org, Borislav Petkov , Rodrigo Vivi , Thomas Gleixner , intel-gvt-dev@lists.freedesktop.org, Jim Mattson , Tvrtko Ursulin , Sean Christopherson , linux-kernel@vger.kernel.org, Paolo Bonzini , Vitaly Kuznetsov Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" --- arch/x86/kvm/mmu/mmu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Signed-off-by: Maxim Levitsky diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 23f895d439cf5..b63398dfdac3b 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5315,8 +5315,8 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, */ if (vcpu->arch.mmu->root_role.direct && (error_code & PFERR_NESTED_GUEST_PAGE) == PFERR_NESTED_GUEST_PAGE) { - kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2_or_gpa)); - return 1; + if (kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2_or_gpa))) + return 1; } /*