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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 7FEDBCCF9E0 for ; Wed, 22 Oct 2025 12:20:00 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vBXoN-00014L-Kt; Wed, 22 Oct 2025 08:19:27 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vBXoL-00013p-Dx for qemu-devel@nongnu.org; Wed, 22 Oct 2025 08:19:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vBXoJ-00073q-Go for qemu-devel@nongnu.org; Wed, 22 Oct 2025 08:19:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1761135562; 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=65Vgceb3D7yf4yWybcxJjxF58FTpfcd+SoMiXXzlJys=; b=AWvJPy4UUwzuUa7qubuSMYkF++EU69Av0k6tAyh0jOczERdI/xISH9ZAUqJZpF9pRNeepj RnPDxGvwLqI9tfPffNjz0cysIwy4L6pqLTgcTVlaHhbS3AAc3lm8gOFC1124ARQ5HROmQV gzN2+S8pwSMBAHK9l9OFRaZCOPvKKUs= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-196-92ZtQlKVNnCaEEwmV9iqYw-1; Wed, 22 Oct 2025 08:18:54 -0400 X-MC-Unique: 92ZtQlKVNnCaEEwmV9iqYw-1 X-Mimecast-MFC-AGG-ID: 92ZtQlKVNnCaEEwmV9iqYw_1761135533 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (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 mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 63548195420F; Wed, 22 Oct 2025 12:18:53 +0000 (UTC) Received: from corto.redhat.com (unknown [10.45.224.12]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E0318180044F; Wed, 22 Oct 2025 12:18:50 +0000 (UTC) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Zhenzhong Duan , Steven Sistare , David Hildenbrand , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 01/12] vfio/container: Remap only populated parts in a section Date: Wed, 22 Oct 2025 14:18:35 +0200 Message-ID: <20251022121846.874152-2-clg@redhat.com> In-Reply-To: <20251022121846.874152-1-clg@redhat.com> References: <20251022121846.874152-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Zhenzhong Duan If there are multiple containers and unmap-all fails for some of them, we need to remap vaddr for the other containers for which unmap-all succeeded. When ram discard is enabled, we should only remap populated parts in a section instead of the whole section. Fixes: eba1f657cbb1 ("vfio/container: recover from unmap-all-vaddr failure") Signed-off-by: Zhenzhong Duan Reviewed-by: Steven Sistare Reviewed-by: David Hildenbrand Link: https://lore.kernel.org/qemu-devel/20250928085432.40107-2-zhenzhong.duan@intel.com Signed-off-by: Cédric Le Goater --- include/hw/vfio/vfio-cpr.h | 2 +- hw/vfio/cpr-legacy.c | 20 +++++++++++++++----- hw/vfio/listener.c | 4 ++-- 3 files changed, 18 insertions(+), 8 deletions(-) diff --git a/include/hw/vfio/vfio-cpr.h b/include/hw/vfio/vfio-cpr.h index 81f4e24e229ef35f5b14582ce6e58415e0ebf3df..4606da500a7969b6519b054280464608ae624bb9 100644 --- a/include/hw/vfio/vfio-cpr.h +++ b/include/hw/vfio/vfio-cpr.h @@ -68,7 +68,7 @@ bool vfio_cpr_container_match(struct VFIOLegacyContainer *container, void vfio_cpr_giommu_remap(struct VFIOContainer *bcontainer, MemoryRegionSection *section); -bool vfio_cpr_ram_discard_register_listener( +bool vfio_cpr_ram_discard_replay_populated( struct VFIOContainer *bcontainer, MemoryRegionSection *section); void vfio_cpr_save_vector_fd(struct VFIOPCIDevice *vdev, const char *name, diff --git a/hw/vfio/cpr-legacy.c b/hw/vfio/cpr-legacy.c index 80af7469d06b2f15a705a97c4b5ddd25a8044115..b4581e8f859323c1c45560f7d345b34f1ed9bd85 100644 --- a/hw/vfio/cpr-legacy.c +++ b/hw/vfio/cpr-legacy.c @@ -228,22 +228,32 @@ void vfio_cpr_giommu_remap(VFIOContainer *bcontainer, memory_region_iommu_replay(giommu->iommu_mr, &giommu->n); } +static int vfio_cpr_rdm_remap(MemoryRegionSection *section, void *opaque) +{ + RamDiscardListener *rdl = opaque; + + return rdl->notify_populate(rdl, section); +} + /* * In old QEMU, VFIO_DMA_UNMAP_FLAG_VADDR may fail on some mapping after * succeeding for others, so the latter have lost their vaddr. Call this - * to restore vaddr for a section with a RamDiscardManager. + * to restore vaddr for populated parts in a section with a RamDiscardManager. * - * The ram discard listener already exists. Call its populate function + * The ram discard listener already exists. Call its replay_populated function * directly, which calls vfio_legacy_cpr_dma_map. */ -bool vfio_cpr_ram_discard_register_listener(VFIOContainer *bcontainer, - MemoryRegionSection *section) +bool vfio_cpr_ram_discard_replay_populated(VFIOContainer *bcontainer, + MemoryRegionSection *section) { + RamDiscardManager *rdm = memory_region_get_ram_discard_manager(section->mr); VFIORamDiscardListener *vrdl = vfio_find_ram_discard_listener(bcontainer, section); g_assert(vrdl); - return vrdl->listener.notify_populate(&vrdl->listener, section) == 0; + return ram_discard_manager_replay_populated(rdm, section, + vfio_cpr_rdm_remap, + &vrdl->listener) == 0; } int vfio_cpr_group_get_device_fd(int d, const char *name) diff --git a/hw/vfio/listener.c b/hw/vfio/listener.c index c6bb58f5209a4c8eb67deac41a89c317fa391447..1b6e5065a3267ab08d2d3fea3c5b4965a80947e8 100644 --- a/hw/vfio/listener.c +++ b/hw/vfio/listener.c @@ -577,8 +577,8 @@ void vfio_container_region_add(VFIOContainer *bcontainer, if (!vfio_ram_discard_register_listener(bcontainer, section, &err)) { goto fail; } - } else if (!vfio_cpr_ram_discard_register_listener(bcontainer, - section)) { + } else if (!vfio_cpr_ram_discard_replay_populated(bcontainer, + section)) { error_setg(&err, "vfio_cpr_ram_discard_register_listener for %s failed", memory_region_name(section->mr)); -- 2.51.0