From patchwork Wed Oct 25 14:50:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13436320 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 1D787C25B6F for ; Wed, 25 Oct 2023 14:51:22 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.622972.970367 (Exim 4.92) (envelope-from ) id 1qvfE1-00030B-65; Wed, 25 Oct 2023 14:51:13 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 622972.970367; Wed, 25 Oct 2023 14:51:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qvfE0-0002xs-JU; Wed, 25 Oct 2023 14:51:12 +0000 Received: by outflank-mailman (input) for mailman id 622972; Wed, 25 Oct 2023 14:51:10 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qvfDy-0000WU-OZ for xen-devel@lists.xenproject.org; Wed, 25 Oct 2023 14:51:10 +0000 Received: from casper.infradead.org (casper.infradead.org [2001:8b0:10b:1236::1]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id ed910d57-7345-11ee-9b0e-b553b5be7939; Wed, 25 Oct 2023 16:51:07 +0200 (CEST) Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1qvfDZ-009Nmp-OP; Wed, 25 Oct 2023 14:50:45 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1qvfDZ-002dFP-0x; Wed, 25 Oct 2023 15:50:45 +0100 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list X-Inumbo-ID: ed910d57-7345-11ee-9b0e-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=y4cEjsiuJ1bFNsoLeKKWM6n6686E9X1lvqONj/DtYQs=; b=lrSrOgOplofh9XNYvO/Y6Cc20E b2BRTomTqLlH4ivgwD4sBmyXjLP3I1Fai6wk4h8Si1HSDLa25iMcQJekBASDQUPnHVIhgwPDGuIPe /fiD7p1xKwU7WPhmYzbbiUGkYAMCw9eYzzmKLc7jSYCCrbc9Il3cn+XOaaQle1LLOunGnghcs49bw 3xgOTsVL24eBNSqWchz1Vf7eCnWmMNu5ej9mU2LmU4o06Qtg1DKPiu8P5eSAmOZnGMDFsJIQQAZUI 06foiSUf0y/lJX5p1rYRRqKVhWC+mTGRpDqqHpAJiAZgoYQGU7Q2itxuffQXtTSt1ckoY4gF2ShZl N4J97H8w==; From: David Woodhouse To: qemu-devel@nongnu.org Cc: Kevin Wolf , Hanna Reitz , Stefano Stabellini , Anthony Perard , Paul Durrant , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , "Michael S. Tsirkin" , Marcel Apfelbaum , Richard Henderson , Eduardo Habkost , Jason Wang , Marcelo Tosatti , qemu-block@nongnu.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Bernhard Beschow , Joel Upham Subject: [PATCH v3 21/28] xen-platform: unplug AHCI disks Date: Wed, 25 Oct 2023 15:50:35 +0100 Message-Id: <20231025145042.627381-22-dwmw2@infradead.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231025145042.627381-1-dwmw2@infradead.org> References: <20231025145042.627381-1-dwmw2@infradead.org> MIME-Version: 1.0 Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html From: David Woodhouse To support Xen guests using the Q35 chipset, the unplug protocol needs to also remove AHCI disks. Make pci_xen_ide_unplug() more generic, iterating over the children of the PCI device and destroying the "ide-hd" devices. That works the same for both AHCI and IDE, as does the detection of the primary disk as unit 0 on the bus named "ide.0". Then pci_xen_ide_unplug() can be used for both AHCI and IDE devices. Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant --- hw/i386/xen/xen_platform.c | 68 +++++++++++++++++++++++++------------- 1 file changed, 45 insertions(+), 23 deletions(-) diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c index e2dd1b536a..ef7d3fc05f 100644 --- a/hw/i386/xen/xen_platform.c +++ b/hw/i386/xen/xen_platform.c @@ -169,39 +169,60 @@ static void pci_unplug_nics(PCIBus *bus) * * [1] https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.pandoc */ -static void pci_xen_ide_unplug(PCIDevice *d, bool aux) +struct ide_unplug_state { + bool aux; + int nr_unplugged; +}; + +static int ide_dev_unplug(DeviceState *dev, void *_st) { - DeviceState *dev = DEVICE(d); - PCIIDEState *pci_ide; - int i; + struct ide_unplug_state *st = _st; IDEDevice *idedev; IDEBus *idebus; BlockBackend *blk; + int unit; + + idedev = IDE_DEVICE(object_dynamic_cast(OBJECT(dev), "ide-hd")); + if (!idedev) { + return 0; + } - pci_ide = PCI_IDE(dev); + idebus = IDE_BUS(qdev_get_parent_bus(dev)); - for (i = aux ? 1 : 0; i < 4; i++) { - idebus = &pci_ide->bus[i / 2]; - blk = idebus->ifs[i % 2].blk; + unit = (idedev == idebus->slave); + assert(unit || idedev == idebus->master); - if (blk && idebus->ifs[i % 2].drive_kind != IDE_CD) { - if (!(i % 2)) { - idedev = idebus->master; - } else { - idedev = idebus->slave; - } + if (st->aux && !unit && !strcmp(BUS(idebus)->name, "ide.0")) { + return 0; + } - blk_drain(blk); - blk_flush(blk); + blk = idebus->ifs[unit].blk; + if (blk) { + blk_drain(blk); + blk_flush(blk); - blk_detach_dev(blk, DEVICE(idedev)); - idebus->ifs[i % 2].blk = NULL; - idedev->conf.blk = NULL; - monitor_remove_blk(blk); - blk_unref(blk); - } + blk_detach_dev(blk, DEVICE(idedev)); + idebus->ifs[unit].blk = NULL; + idedev->conf.blk = NULL; + monitor_remove_blk(blk); + blk_unref(blk); + } + + object_unparent(OBJECT(dev)); + st->nr_unplugged++; + + return 0; +} + +static void pci_xen_ide_unplug(PCIDevice *d, bool aux) +{ + struct ide_unplug_state st = { aux, 0 }; + DeviceState *dev = DEVICE(d); + + qdev_walk_children(dev, NULL, NULL, ide_dev_unplug, NULL, &st); + if (st.nr_unplugged) { + pci_device_reset(d); } - pci_device_reset(d); } static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque) @@ -216,6 +237,7 @@ static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque) switch (pci_get_word(d->config + PCI_CLASS_DEVICE)) { case PCI_CLASS_STORAGE_IDE: + case PCI_CLASS_STORAGE_SATA: pci_xen_ide_unplug(d, aux); break;