From nobody Sat May 18 07:31:23 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1651153976276757.6819639536413; Thu, 28 Apr 2022 06:52:56 -0700 (PDT) Received: from localhost ([::1]:59384 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nk4Zj-00026u-0X for importer@patchew.org; Thu, 28 Apr 2022 09:52:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52284) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nk4Ws-0008Ti-HQ for qemu-devel@nongnu.org; Thu, 28 Apr 2022 09:49:58 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:49656) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nk4Wp-0004SO-UQ for qemu-devel@nongnu.org; Thu, 28 Apr 2022 09:49:57 -0400 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-544-392C2kgZNgiLXGyk3kK2nQ-1; Thu, 28 Apr 2022 09:49:52 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9CDC73C172CE; Thu, 28 Apr 2022 13:49:51 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.39.193.232]) by smtp.corp.redhat.com (Postfix) with ESMTP id 94DE6C15D58; Thu, 28 Apr 2022 13:49:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1651153795; 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; bh=G8xVrLo2LQ525VoOALvW4lyo9FS7ugwJujfd0zE1nv4=; b=SD1atSynTG2fQ72gAwhs1yh+7hBq1awQXxls0vBjWZZxUz4HO8+VpXSfelTWvBbLwBsoCb zOahDekdWyzx/xvAMIpdv44EuYGb4jqKgUDUIZN25RCwB8ZUG0DhY7QRcMkqLMq3uov7Y4 wn13XmZ5SXA0i1FvrYme3EsLIkSr8yU= X-MC-Unique: 392C2kgZNgiLXGyk3kK2nQ-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, alex.williamson@redhat.com Subject: [PATCH v4] vfio/common: remove spurious tpm-crb-cmd misalignment warning Date: Thu, 28 Apr 2022 15:49:45 +0200 Message-Id: <20220428134945.511829-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=170.10.133.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Cc: cohuck@redhat.com, f4bug@amsat.org, stefanb@linux.vnet.ibm.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1651153978758100002 The CRB command buffer currently is a RAM MemoryRegion and given its base address alignment, it causes an error report on vfio_listener_region_add(). This region could have been a RAM device region, easing the detection of such safe situation but this option was not well received. So let's add a helper function that uses the memory region owner type to detect the situation is safe wrt the assignment. Other device types can be checked here if such kind of problem occurs again. Signed-off-by: Eric Auger Reviewed-by: Philippe Mathieu-Daud=C3=A9 Acked-by: Stefan Berger Reviewed-by: Cornelia Huck --- v3 -> v4: - rebase on top of qemu_real_host_page_size() and qemu_real_host_page_size(). Print the size and make the message consistent - Added Stefan's A-b and Connie R-b (despite the changes) --- hw/vfio/common.c | 27 ++++++++++++++++++++++++++- hw/vfio/trace-events | 1 + 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 2b1f78fdfa..f6b9bb6d71 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -40,6 +40,7 @@ #include "trace.h" #include "qapi/error.h" #include "migration/migration.h" +#include "sysemu/tpm.h" =20 VFIOGroupList vfio_group_list =3D QLIST_HEAD_INITIALIZER(vfio_group_list); @@ -861,6 +862,22 @@ static void vfio_unregister_ram_discard_listener(VFIOC= ontainer *container, g_free(vrdl); } =20 +static bool vfio_known_safe_misalignment(MemoryRegionSection *section) +{ + MemoryRegion *mr =3D section->mr; + + if (!TPM_IS_CRB(mr->owner)) { + return false; + } + + /* this is a known safe misaligned region, just trace for debug purpos= e */ + trace_vfio_known_safe_misalignment(memory_region_name(mr), + section->offset_within_address_spac= e, + section->offset_within_region, + qemu_real_host_page_size()); + return true; +} + static void vfio_listener_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -884,7 +901,15 @@ static void vfio_listener_region_add(MemoryListener *l= istener, if (unlikely((section->offset_within_address_space & ~qemu_real_host_page_mask()) !=3D (section->offset_within_region & ~qemu_real_host_page_mas= k()))) { - error_report("%s received unaligned region", __func__); + if (!vfio_known_safe_misalignment(section)) { + error_report("%s received unaligned region %s iova=3D0x%"PRIx64 + " offset_within_region=3D0x%"PRIx64 + " qemu_real_host_page_size=3D0x%"PRIxPTR, + __func__, memory_region_name(section->mr), + section->offset_within_address_space, + section->offset_within_region, + qemu_real_host_page_size()); + } return; } =20 diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 0ef1b5f4a6..582882db91 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -100,6 +100,7 @@ vfio_listener_region_add_skip(uint64_t start, uint64_t = end) "SKIPPING region_add vfio_spapr_group_attach(int groupfd, int tablefd) "Attached groupfd %d to = liobn fd %d" vfio_listener_region_add_iommu(uint64_t start, uint64_t end) "region_add [= iommu] 0x%"PRIx64" - 0x%"PRIx64 vfio_listener_region_add_ram(uint64_t iova_start, uint64_t iova_end, void = *vaddr) "region_add [ram] 0x%"PRIx64" - 0x%"PRIx64" [%p]" +vfio_known_safe_misalignment(const char *name, uint64_t iova, uint64_t off= set_within_region, uintptr_t page_size) "Region \"%s\" iova=3D0x%"PRIx64" o= ffset_within_region=3D0x%"PRIx64" qemu_real_host_page_size=3D0x%"PRIxPTR ":= cannot be mapped for DMA" vfio_listener_region_add_no_dma_map(const char *name, uint64_t iova, uint6= 4_t size, uint64_t page_size) "Region \"%s\" 0x%"PRIx64" size=3D0x%"PRIx64"= is not aligned to 0x%"PRIx64" and cannot be mapped for DMA" vfio_listener_region_del_skip(uint64_t start, uint64_t end) "SKIPPING regi= on_del 0x%"PRIx64" - 0x%"PRIx64 vfio_listener_region_del(uint64_t start, uint64_t end) "region_del 0x%"PRI= x64" - 0x%"PRIx64 --=20 2.34.1