From patchwork Sat Oct 22 04:40:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akihiko Odaki X-Patchwork-Id: 13015772 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 9D99CC04A95 for ; Sat, 22 Oct 2022 05:19:19 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1om6Jx-0005Eg-2n; Sat, 22 Oct 2022 00:41:17 -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 1om6Jt-0005EK-CY for qemu-devel@nongnu.org; Sat, 22 Oct 2022 00:41:14 -0400 Received: from mail-pl1-x62c.google.com ([2607:f8b0:4864:20::62c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1om6Jr-0003Gl-B6 for qemu-devel@nongnu.org; Sat, 22 Oct 2022 00:41:12 -0400 Received: by mail-pl1-x62c.google.com with SMTP id k9so4059581pll.11 for ; Fri, 21 Oct 2022 21:41:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=KSduAt5OWvLla49AODdFswSKTVSp8teWN5RFR6WXygs=; b=IGZTGdBA+0XF3fkB1E2JfP1QnJz5sVhf+uYum/WaWJ5OYXRx+7RXTFM23oKRh4Bv+i vovKHRhn1shdCW+SQUcWD9g780RMZwdRs1PMHXaBQpWJzMdhf/jW+xusemhLYaozOdU4 YLrshT6NYyc7Nhx+W2hX8Smqwtf5gQrrYuWLacjiIl+j7POrvANX6s80hyPFtJEkllh5 bZ5zNlZdpa+8VNl4Y8W0Lrt6f95I7+MkDkVwdVjpY13JGpSpRTMN3FaevQB0BFb6j9Ha Bka1PXUni/61yAUnjugi6F1NLn6RgLL2tjML0dCFEalxt8aPXTtciERu1j7DM0oF8l+h iu+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=KSduAt5OWvLla49AODdFswSKTVSp8teWN5RFR6WXygs=; b=vDzhcFoxvY22zllipoVlz+/2ppIiNzQHZfcjyaNdsadHpBurJjf5Di2ySCmFwuw8Ly cQ8mwrzfsgl3+hv9eqfATnZfjpyPcH/GO8LOYtsAbC8KX2jApR3x3UuWG8bdlW3ekMFx 2zTRHf6jqVDdgfVRsEwl4AhRZyXOLhJNlyTorzpvvsFpo3STuKEANXD3tlJuqK+Mz5Nz NNFDmqvD2iwvB7PzoNnKIDif6uQ5zu9P4WvWcelh6iYJebXMfahBcE7g0PntDaX+WX1R TZFoSHR6NPXhyNPSFPr4wMck4RQYuYlqGVr5wjg2XKIXECstqb5zcbwngzp/Xscjcooo EUiA== X-Gm-Message-State: ACrzQf2nepu2eaKdyIzrAN/4UTuciEcrn7JmhcDX3vlmUjKxIOxVk7Eh 3V7BlRYpLBzgGi722Webr6gZKw== X-Google-Smtp-Source: AMsMyM5wCZaYTVGhuUJZQdQ76DrG4TC8wXs/c3iioocYXz4RGOHm6PJSdQxBZI9gD03bbgeB4l0S3Q== X-Received: by 2002:a17:90b:d98:b0:212:d3f9:c311 with SMTP id bg24-20020a17090b0d9800b00212d3f9c311mr6195585pjb.243.1666413668637; Fri, 21 Oct 2022 21:41:08 -0700 (PDT) Received: from fedora.flets-east.jp ([2400:4050:c360:8200:8ae8:3c4:c0da:7419]) by smtp.gmail.com with ESMTPSA id y16-20020a17090264d000b001868d4600b8sm178049pli.158.2022.10.21.21.41.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Oct 2022 21:41:08 -0700 (PDT) From: Akihiko Odaki To: Cc: Alex Williamson , qemu-devel@nongnu.org, qemu-block@nongnu.org, qemu-arm@nongnu.org, "Michael S . Tsirkin" , Marcel Apfelbaum , Gerd Hoffmann , Paolo Bonzini , Richard Henderson , Eduardo Habkost , John Snow , Dmitry Fleytman , Jason Wang , Stefan Weil , Keith Busch , Klaus Jensen , Peter Maydell , Andrey Smirnov , Paul Burton , Aleksandar Rikalo , Yan Vugenfirer , Yuri Benditovich , Akihiko Odaki Subject: [PATCH v2 00/17] pci: Abort if pci_add_capability fails Date: Sat, 22 Oct 2022 13:40:36 +0900 Message-Id: <20221022044053.81650-1-akihiko.odaki@daynix.com> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 Received-SPF: none client-ip=2607:f8b0:4864:20::62c; envelope-from=akihiko.odaki@daynix.com; helo=mail-pl1-x62c.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=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: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org pci_add_capability appears most PCI devices. Its error handling required lots of code, and led to inconsistent behaviors such as: - passing error_abort - passing error_fatal - asserting the returned value - propagating the error to the caller - skipping the rest of the function - just ignoring The code generating errors in pci_add_capability had a comment which says: > Verify that capabilities don't overlap. Note: device assignment > depends on this check to verify that the device is not broken. > Should never trigger for emulated devices, but it's helpful for > debugging these. Indeed vfio has some code that passes capability offsets and sizes from a physical device, but it explicitly pays attention so that the capabilities never overlap. Therefore, we can always assert that capabilities never overlap when pci_add_capability is called, resolving these inconsistencies. v2: Split the patch (Markus Armbruster) Akihiko Odaki (17): pci: Allow to omit errp for pci_add_capability hw/i386/amd_iommu: Omit errp for pci_add_capability ahci: Omit errp for pci_add_capability e1000e: Omit errp for pci_add_capability eepro100: Omit errp for pci_add_capability hw/nvme: Omit errp for pci_add_capability msi: Omit errp for pci_add_capability hw/pci/pci_bridge: Omit errp for pci_add_capability pcie: Omit errp for pci_add_capability pci/shpc: Omit errp for pci_add_capability msix: Omit errp for pci_add_capability pci/slotid: Omit errp for pci_add_capability hw/pci-bridge/pcie_pci_bridge: Omit errp for pci_add_capability hw/vfio/pci-quirks: Omit errp for pci_add_capability hw/vfio/pci: Omit errp for pci_add_capability virtio-pci: Omit errp for pci_add_capability pci: Remove legacy errp from pci_add_capability docs/pcie_sriov.txt | 4 +-- hw/display/bochs-display.c | 4 +-- hw/i386/amd_iommu.c | 21 +++--------- hw/ide/ich.c | 8 ++--- hw/net/e1000e.c | 22 +++---------- hw/net/eepro100.c | 7 +--- hw/nvme/ctrl.c | 14 ++------ hw/pci-bridge/cxl_downstream.c | 9 ++---- hw/pci-bridge/cxl_upstream.c | 8 ++--- hw/pci-bridge/i82801b11.c | 14 ++------ hw/pci-bridge/pci_bridge_dev.c | 2 +- hw/pci-bridge/pcie_pci_bridge.c | 19 +++-------- hw/pci-bridge/pcie_root_port.c | 16 ++------- hw/pci-bridge/xio3130_downstream.c | 15 ++------- hw/pci-bridge/xio3130_upstream.c | 15 ++------- hw/pci-host/designware.c | 3 +- hw/pci-host/xilinx-pcie.c | 4 +-- hw/pci/msi.c | 9 +----- hw/pci/msix.c | 8 ++--- hw/pci/pci.c | 29 ++++------------- hw/pci/pci_bridge.c | 21 ++++-------- hw/pci/pcie.c | 52 ++++++++---------------------- hw/pci/shpc.c | 23 ++++--------- hw/pci/slotid_cap.c | 8 ++--- hw/usb/hcd-xhci-pci.c | 3 +- hw/vfio/pci-quirks.c | 15 ++------- hw/vfio/pci.c | 14 +++----- hw/virtio/virtio-pci.c | 12 ++----- include/hw/pci/pci.h | 5 ++- include/hw/pci/pci_bridge.h | 5 ++- include/hw/pci/pcie.h | 11 +++---- include/hw/pci/shpc.h | 3 +- include/hw/virtio/virtio-pci.h | 2 +- 33 files changed, 99 insertions(+), 306 deletions(-)