From patchwork Mon Apr 27 18:24:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Suvorova X-Patchwork-Id: 11513155 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ACFF115E6 for ; Mon, 27 Apr 2020 18:27:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3B577214AF for ; Mon, 27 Apr 2020 18:27:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="C4Z+eJqq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3B577214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:58152 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jT8U0-00031u-DX for patchwork-qemu-devel@patchwork.kernel.org; Mon, 27 Apr 2020 14:27:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35978) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jT8RE-0005KM-Qe for qemu-devel@nongnu.org; Mon, 27 Apr 2020 14:25:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jT8RC-0003dM-P6 for qemu-devel@nongnu.org; Mon, 27 Apr 2020 14:25:04 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:26337 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jT8RC-0003cw-CF for qemu-devel@nongnu.org; Mon, 27 Apr 2020 14:25:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588011901; 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=6rjwKrRbF7TqI4JpiMawhHYLnga2FlH1hW5QJFIstEA=; b=C4Z+eJqq/3qLIjMpbK70p6U1MtIFycXtuSA9vkR8AEt+pWUYpexSBqcoleHLpEGtCqz1AT d7K1DCoS/RRw0uHjoU94rGjjzTU8Fl6hZEELgjDmNRZGw2Aow3x3LGSDlpKsCWrTqBTFAh cjiMtx2YxG0K6XCMuUakHUMg9+cCEbg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-235-jn5-_37CNAaX3sesXe-ksA-1; Mon, 27 Apr 2020 14:24:59 -0400 X-MC-Unique: jn5-_37CNAaX3sesXe-ksA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B248F107ACCA; Mon, 27 Apr 2020 18:24:58 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.40.192.23]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 335F360BE2; Mon, 27 Apr 2020 18:24:56 +0000 (UTC) From: Julia Suvorova To: qemu-devel@nongnu.org Subject: [PATCH v2 1/2] hw/pci/pcie: Forbid hot-plug if it's disabled on the slot Date: Mon, 27 Apr 2020 20:24:39 +0200 Message-Id: <20200427182440.92433-2-jusual@redhat.com> In-Reply-To: <20200427182440.92433-1-jusual@redhat.com> References: <20200427182440.92433-1-jusual@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=jusual@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/27 02:05:28 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 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: , Cc: Igor Mammedov , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Julia Suvorova , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Raise an error when trying to hot-plug/unplug a device through QMP to a device with disabled hot-plug capability. This makes the device behaviour more consistent and provides an explanation of the failure in the case of asynchronous unplug. Signed-off-by: Julia Suvorova Reviewed-by: Marcel Apfelbaum --- v2: * Change error text [Igor, Michael] * Move cleanup to a separate patch [Marcel] hw/pci/pcie.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index 0eb3a2a5d2..6b48d04d2c 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -415,6 +415,7 @@ void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, { PCIDevice *hotplug_pdev = PCI_DEVICE(hotplug_dev); uint8_t *exp_cap = hotplug_pdev->config + hotplug_pdev->exp.exp_cap; + uint32_t sltcap = pci_get_word(exp_cap + PCI_EXP_SLTCAP); PCIDevice *pci_dev = PCI_DEVICE(dev); /* Don't send event when device is enabled during qemu machine creation: @@ -430,6 +431,13 @@ void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, return; } + /* Check if hot-plug is disabled on the slot */ + if ((sltcap & PCI_EXP_SLTCAP_HPC) == 0) { + error_setg(errp, "Hot-plug failed: unsupported by the port device '%s'", + DEVICE(hotplug_pdev)->id); + return; + } + /* To enable multifunction hot-plug, we just ensure the function * 0 added last. When function 0 is added, we set the sltsta and * inform OS via event notification. @@ -470,6 +478,17 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev, Error *local_err = NULL; PCIDevice *pci_dev = PCI_DEVICE(dev); PCIBus *bus = pci_get_bus(pci_dev); + PCIDevice *hotplug_pdev = PCI_DEVICE(hotplug_dev); + uint8_t *exp_cap = hotplug_pdev->config + hotplug_pdev->exp.exp_cap; + uint32_t sltcap = pci_get_word(exp_cap + PCI_EXP_SLTCAP); + + /* Check if hot-unplug is disabled on the slot */ + if ((sltcap & PCI_EXP_SLTCAP_HPC) == 0) { + error_setg(errp, "Hot-unplug failed: " + "unsupported by the port device '%s'", + DEVICE(hotplug_pdev)->id); + return; + } pcie_cap_slot_plug_common(PCI_DEVICE(hotplug_dev), dev, &local_err); if (local_err) {