From nobody Mon Feb 9 16:01:33 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1569313732; cv=none; d=zoho.com; s=zohoarc; b=YkJhze9u2ih+5OAmS0vFI1n3MkBqmfuWSYT4wHLD4BtMkyK8u2JcIkmj+xI3fdy9nHp1lS1dRVMfTXhSpCpArV9R5OY6EXup7k2rjMqVtI/NQFtZNd6XqVOWESXsCddKqXFvFVobsyhG1zR5IyuoAEH9PRWVk14shxR5Bj+qt40= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1569313732; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=/XubTthtEZo0SoFtuzWqgidV2bfraC/OzAxdRbp3WC8=; b=Z08z841sWQyc6msefN47h+fedpRspCSetAHBeRkD1lT+agJGbxpN3B8SE85LGFi3zzbHLCuPWktP2IdMKpG5wF2GBDqaf/N8BSpnmqVDyOkua0MQnLn+4FnvP4BsPs1Q+PEufW7AocyI1GwXr0IAS9tk9jtNpDrkk3OrQIUp31w= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1569313732658194.70896955393255; Tue, 24 Sep 2019 01:28:52 -0700 (PDT) Received: from localhost ([::1]:42522 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iCgBn-0002eB-Ac for importer@patchew.org; Tue, 24 Sep 2019 04:28:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46883) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iCg8i-0000g9-8M for qemu-devel@nongnu.org; Tue, 24 Sep 2019 04:25:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iCg8g-0006tA-N8 for qemu-devel@nongnu.org; Tue, 24 Sep 2019 04:25:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56858) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iCg8a-0006sB-Sc; Tue, 24 Sep 2019 04:25:34 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id 5DB873082133; Tue, 24 Sep 2019 08:25:31 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-30.ams2.redhat.com [10.36.116.30]) by smtp.corp.redhat.com (Postfix) with ESMTP id F232460603; Tue, 24 Sep 2019 08:25:28 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com, aik@ozlabs.ru, david@gibson.dropbear.id.au Subject: [PATCH v4 1/2] vfio: Turn the container error into an Error handle Date: Tue, 24 Sep 2019 10:25:16 +0200 Message-Id: <20190924082517.13724-2-eric.auger@redhat.com> In-Reply-To: <20190924082517.13724-1-eric.auger@redhat.com> References: <20190924082517.13724-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Tue, 24 Sep 2019 08:25:31 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" The container error integer field is currently used to store the first error potentially encountered during any vfio_listener_region_add() call. However this fails to propagate detailed error messages up to the vfio_connect_container caller. Instead of using an integer, let's use an Error handle. Messages are slightly reworded to accomodate the propagation. Signed-off-by: Eric Auger Acked-by: Paolo Bonzini --- v3 -> v4: - remove ret useless assignments and restore hw_error() - remove mr local variable - trace [start, end] instead of [start, size] and improve the message for overalp with existing DMA host window --- hw/vfio/common.c | 43 +++++++++++++++++++++++------------ hw/vfio/spapr.c | 4 +++- include/hw/vfio/vfio-common.h | 2 +- 3 files changed, 32 insertions(+), 17 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 3e03c495d8..cebbb1c28a 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -509,6 +509,7 @@ static void vfio_listener_region_add(MemoryListener *li= stener, int ret; VFIOHostDMAWindow *hostwin; bool hostwin_found; + Error *err =3D NULL; =20 if (vfio_listener_skipped_section(section)) { trace_vfio_listener_region_add_skip( @@ -543,13 +544,20 @@ static void vfio_listener_region_add(MemoryListener *= listener, hostwin->max_iova - hostwin->min_iova + 1, section->offset_within_address_space, int128_get64(section->size))) { - ret =3D -1; + error_setg(&err, + "region [0x%"PRIx64",0x%"PRIx64"] overlaps with existi= ng" + "host DMA window [0x%"PRIx64",0x%"PRIx64"]", + section->offset_within_address_space, + section->offset_within_address_space + + int128_get64(section->size) - 1, + hostwin->min_iova, hostwin->max_iova); goto fail; } } =20 ret =3D vfio_spapr_create_window(container, section, &pgsize); if (ret) { + error_setg_errno(&err, -ret, "Failed to create SPAPR window"); goto fail; } =20 @@ -594,10 +602,8 @@ static void vfio_listener_region_add(MemoryListener *l= istener, } =20 if (!hostwin_found) { - error_report("vfio: IOMMU container %p can't map guest IOVA region" - " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, - container, iova, end); - ret =3D -EFAULT; + error_setg(&err, "Container %p can't map guest IOVA region" + " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, container, iova, e= nd); goto fail; } =20 @@ -664,11 +670,12 @@ static void vfio_listener_region_add(MemoryListener *= listener, ret =3D vfio_dma_map(container, iova, int128_get64(llsize), vaddr, section->readonly); if (ret) { - error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " - "0x%"HWADDR_PRIx", %p) =3D %d (%m)", - container, iova, int128_get64(llsize), vaddr, ret); + error_setg(&err, "vfio_dma_map(%p, 0x%"HWADDR_PRIx", " + "0x%"HWADDR_PRIx", %p) =3D %d (%m)", + container, iova, int128_get64(llsize), vaddr, ret); if (memory_region_is_ram_device(section->mr)) { /* Allow unexpected mappings not to be fatal for RAM devices */ + error_report_err(err); return; } goto fail; @@ -688,9 +695,14 @@ fail: */ if (!container->initialized) { if (!container->error) { - container->error =3D ret; + error_propagate_prepend(&container->error, err, + "Region %s: ", + memory_region_name(section->mr)); + } else { + error_free(err); } } else { + error_report_err(err); hw_error("vfio: DMA mapping failed, unable to continue"); } } @@ -1251,6 +1263,7 @@ static int vfio_connect_container(VFIOGroup *group, A= ddressSpace *as, container =3D g_malloc0(sizeof(*container)); container->space =3D space; container->fd =3D fd; + container->error =3D NULL; QLIST_INIT(&container->giommu_list); QLIST_INIT(&container->hostwin_list); =20 @@ -1308,9 +1321,9 @@ static int vfio_connect_container(VFIOGroup *group, A= ddressSpace *as, &address_space_memory); if (container->error) { memory_listener_unregister(&container->prereg_listener); - ret =3D container->error; - error_setg(errp, - "RAM memory listener initialization failed for contain= er"); + ret =3D -1; + error_propagate_prepend(errp, container->error, + "RAM memory listener initialization failed: "); goto free_container_exit; } } @@ -1365,9 +1378,9 @@ static int vfio_connect_container(VFIOGroup *group, A= ddressSpace *as, memory_listener_register(&container->listener, container->space->as); =20 if (container->error) { - ret =3D container->error; - error_setg_errno(errp, -ret, - "memory listener initialization failed for contai= ner"); + ret =3D -1; + error_propagate_prepend(errp, container->error, + "memory listener initialization failed: "); goto listener_release_exit; } =20 diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c index 96c0ad9d9b..e853eebe11 100644 --- a/hw/vfio/spapr.c +++ b/hw/vfio/spapr.c @@ -17,6 +17,7 @@ #include "hw/hw.h" #include "exec/ram_addr.h" #include "qemu/error-report.h" +#include "qapi/error.h" #include "trace.h" =20 static bool vfio_prereg_listener_skipped_section(MemoryRegionSection *sect= ion) @@ -85,7 +86,8 @@ static void vfio_prereg_listener_region_add(MemoryListene= r *listener, */ if (!container->initialized) { if (!container->error) { - container->error =3D ret; + error_setg_errno(&container->error, -ret, + "Memory registering failed"); } } else { hw_error("vfio: Memory registering failed, unable to continue"= ); diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 9107bd41c0..fd564209ac 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -71,7 +71,7 @@ typedef struct VFIOContainer { MemoryListener listener; MemoryListener prereg_listener; unsigned iommu_type; - int error; + Error *error; bool initialized; unsigned long pgsizes; QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; --=20 2.20.1