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Fri, 12 Nov 2021 12:51:13 -0800 (PST) X-Google-Smtp-Source: ABdhPJy0wkvDt8Vm1QSu8YK4/LZamKXu6aFKeWtGglFBDk6xj/TP8B8ClIv5nuw7bzyv8IYSQOBgpA== X-Received: by 2002:aa7:dd47:: with SMTP id o7mr25316335edw.34.1636750273288; Fri, 12 Nov 2021 12:51:13 -0800 (PST) Received: from localhost ([185.140.112.229]) by smtp.gmail.com with ESMTPSA id sc27sm3120796ejc.125.2021.11.12.12.51.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Nov 2021 12:51:12 -0800 (PST) Date: Fri, 12 Nov 2021 21:51:11 +0100 From: Igor Mammedov To: "Daniel P. =?UTF-8?B?QmVycmFuZ8Op?=" Subject: Re: Guests wont start with 15 pcie-root-port devices Message-ID: <20211112215111.6f854f7a@redhat.com> In-Reply-To: References: X-Mailer: Claws Mail 3.18.0 (GTK+ 2.24.33; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=imammedo@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=216.205.24.124; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.699, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-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: , Cc: brak@gameservers.com, qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, 12 Nov 2021 17:53:42 +0000 Daniel P. Berrang=C3=A9 wrote: > On Fri, Nov 12, 2021 at 12:35:07PM -0500, Brian Rak wrote: > > In 6.1, a guest with 15 empty pcie-root-port devices will not boot prop= erly > > - it just hangs on "Guest has not initialized the display (yet).".=C2= =A0 As soon > > as I remove the last pcie-root-port, the guest begins starting up norma= lly.=C2=A0 =20 >=20 > Yes, QEMU 6.1 has a regression >=20 > https://gitlab.com/qemu-project/qemu/-/issues/641=20 >=20 >=20 > > commit e2a6290aab578b2170c1f5909fa556385dc0d820 > > Author: Marcel Apfelbaum > > Date:=C2=A0=C2=A0 Mon Aug 2 12:00:57 2021 +0300 > >=20 > > =C2=A0=C2=A0=C2=A0 hw/pcie-root-port: Fix hotplug for PCI devices requi= ring IO > >=20 > > Although I can't say I really understand why that commit triggered it. = =20 >=20 > It caused the firmware to always allocate I/O space for every port > and there's limited total I/O space, so it runs out at 15 devices. alternatively instead of reverting to native PCIe hotplug as in the issue Daniel's mentioned, you can apply following fix https://patchew.org/QEMU/20211112110857.3116853-1-imammedo@redhat.com/ >=20 > Regards, > Daniel