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[79.181.55.232]) by smtp.gmail.com with ESMTPSA id a3sm5964129wrp.91.2020.06.09.21.27.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jun 2020 21:27:36 -0700 (PDT) Date: Wed, 10 Jun 2020 00:27:35 -0400 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL 28/56] hw/pci/pcie: Move hot plug capability check to pre_plug callback Message-ID: <20200610042613.1459309-29-mst@redhat.com> References: <20200610042613.1459309-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200610042613.1459309-1-mst@redhat.com> X-Mailer: git-send-email 2.24.1.751.gd10ce2899c X-Mutt-Fcc: =sent X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Received-SPF: pass client-ip=205.139.110.61; envelope-from=mst@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/09 23:51:15 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: Peter Maydell , Julia Suvorova , Igor Mammedov Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Julia Suvorova Check for hot plug capability earlier to avoid removing devices attached during the initialization process. Run qemu with an unattached drive: -drive file=$FILE,if=none,id=drive0 \ -device pcie-root-port,id=rp0,slot=3,bus=pcie.0,hotplug=off Hotplug a block device: device_add virtio-blk-pci,id=blk0,drive=drive0,bus=rp0 If hotplug fails on plug_cb, drive0 will be deleted. Fixes: 0501e1aa1d32a6 ("hw/pci/pcie: Forbid hot-plug if it's disabled on the slot") Acked-by: Igor Mammedov Signed-off-by: Julia Suvorova Message-Id: <20200604125947.881210-1-jusual@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/pci/pcie.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index f50e10b8fb..5b9c022d91 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -407,6 +407,17 @@ static void pcie_cap_slot_plug_common(PCIDevice *hotplug_dev, DeviceState *dev, void pcie_cap_slot_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { + 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-plug is disabled on the slot */ + if (dev->hotplugged && (sltcap & PCI_EXP_SLTCAP_HPC) == 0) { + error_setg(errp, "Hot-plug failed: unsupported by the port device '%s'", + DEVICE(hotplug_pdev)->id); + return; + } + pcie_cap_slot_plug_common(PCI_DEVICE(hotplug_dev), dev, errp); } @@ -415,7 +426,6 @@ 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: @@ -431,13 +441,6 @@ 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.