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 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 B22F5C433F5 for ; Mon, 7 Feb 2022 15:32:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D9A7E112467; Mon, 7 Feb 2022 15:32:54 +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 57911112467 for ; Mon, 7 Feb 2022 15:32:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1644247972; 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=w984BAq0R1oM4sAFKCgHPFGUA43pzvjZKViTrxIXmwo=; b=GBrildwA5IKeIfaJrmmvBzBw2uJ3v1XICKmaKbwQMBe0SHGFlZPHKMh717LzaxcotK06Lg cTZqNML6qfeo9sn13kJEx9X7ZPQdQDBtbi/CFfv6maszCiHPiz/sigSKjS/brUawvGR5HH wdAhtoaJfVj7tOF2nIK03Mx0dLjsDK0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-48-n_weAD-0NLG-GcN03me7-g-1; Mon, 07 Feb 2022 10:32:49 -0500 X-MC-Unique: n_weAD-0NLG-GcN03me7-g-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 43C3B15720; Mon, 7 Feb 2022 15:32:46 +0000 (UTC) Received: from localhost.localdomain (unknown [10.40.192.15]) by smtp.corp.redhat.com (Postfix) with ESMTP id 936F484FFB; Mon, 7 Feb 2022 15:32:38 +0000 (UTC) From: Maxim Levitsky To: kvm@vger.kernel.org Date: Mon, 7 Feb 2022 17:28:38 +0200 Message-Id: <20220207152847.836777-22-mlevitsk@redhat.com> In-Reply-To: <20220207152847.836777-1-mlevitsk@redhat.com> References: <20220207152847.836777-1-mlevitsk@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Subject: [Intel-gfx] [PATCH 21/30] x86: KVMGT: use kvm_page_track_write_tracking_enable X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dave Hansen , Wanpeng Li , David Airlie , "Chang S. Bae" , "maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" , "open list:X86 ARCHITECTURE 32-BIT AND 64-BIT" , Maxim Levitsky , Tony Luck , "open list:DRM DRIVERS" , Brijesh Singh , Paolo Bonzini , Vitaly Kuznetsov , Jim Mattson , "open list:INTEL GVT-g DRIVERS Intel GPU Virtualization" , "open list:INTEL DRM DRIVERS excluding Poulsbo, Moorestow..., Joerg Roedel , Borislav Petkov , Daniel Vetter , \"H. Peter Anvin\" , Ingo Molnar , Sean Christopherson , Joonas Lahtinen , Pawan Gupta , Thomas Gleixner " , Kan Liang Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This allows to enable the write tracking only when KVMGT is actually used and doesn't carry any penalty otherwise. Tested by booting a VM with a kvmgt mdev device. Signed-off-by: Maxim Levitsky --- arch/x86/kvm/Kconfig | 3 --- arch/x86/kvm/mmu/mmu.c | 2 +- drivers/gpu/drm/i915/Kconfig | 1 - drivers/gpu/drm/i915/gvt/kvmgt.c | 5 +++++ 4 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index ebc8ce9ec9173..169f8833cd0d1 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -132,7 +132,4 @@ config KVM_MMU_AUDIT This option adds a R/W kVM module parameter 'mmu_audit', which allows auditing of KVM MMU events at runtime. -config KVM_EXTERNAL_WRITE_TRACKING - bool - endif # VIRTUALIZATION diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 431e02ba73690..e4e2fc8e7d7a5 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5712,7 +5712,7 @@ void kvm_mmu_init_vm(struct kvm *kvm) node->track_flush_slot = kvm_mmu_invalidate_zap_pages_in_memslot; kvm_page_track_register_notifier(kvm, node); - if (IS_ENABLED(CONFIG_KVM_EXTERNAL_WRITE_TRACKING) || !tdp_enabled) + if (!tdp_enabled) mmu_enable_write_tracking(kvm); } diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig index 84b6fc70cbf52..bf041b26ffec3 100644 --- a/drivers/gpu/drm/i915/Kconfig +++ b/drivers/gpu/drm/i915/Kconfig @@ -126,7 +126,6 @@ config DRM_I915_GVT_KVMGT depends on DRM_I915_GVT depends on KVM depends on VFIO_MDEV - select KVM_EXTERNAL_WRITE_TRACKING default n help Choose this option if you want to enable KVMGT support for diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 20b82fb036f8c..64ced3c2bc550 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1916,6 +1916,7 @@ static int kvmgt_guest_init(struct mdev_device *mdev) struct intel_vgpu *vgpu; struct kvmgt_vdev *vdev; struct kvm *kvm; + int ret; vgpu = mdev_get_drvdata(mdev); if (handle_valid(vgpu->handle)) @@ -1931,6 +1932,10 @@ static int kvmgt_guest_init(struct mdev_device *mdev) if (__kvmgt_vgpu_exist(vgpu, kvm)) return -EEXIST; + ret = kvm_page_track_write_tracking_enable(kvm); + if (ret) + return ret; + info = vzalloc(sizeof(struct kvmgt_guest_info)); if (!info) return -ENOMEM; -- 2.26.3