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([2001:b07:6468:f312:e427:3beb:1110:dda2]) by smtp.gmail.com with ESMTPSA id h133sm24905915wme.28.2019.07.17.06.52.28 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Wed, 17 Jul 2019 06:52:28 -0700 (PDT) To: Collin Walling , Thomas Huth , Markus Armbruster References: <20190715095545.28545-1-philmd@redhat.com> <20190715095545.28545-2-philmd@redhat.com> <6d69e8ad-d720-ce04-20f2-a03193903078@redhat.com> <20190715125653.6e65d575.cohuck@redhat.com> <20190715130955.4a117388.cohuck@redhat.com> <13fce62f-234c-1b13-595f-5910c066bc4f@redhat.com> <6c39a198-e951-c0bd-1ddc-5d227afe72ff@redhat.com> <87a7dfth4i.fsf@dusky.pond.sub.org> <20190715181206.3cb1db93.cohuck@redhat.com> <799aa0f5-8850-5caa-5103-e1cf3cdb018f@redhat.com> <87h87m2knh.fsf@dusky.pond.sub.org> <50befb09-d381-4362-9cd1-6fb11c96a719@linux.ibm.com> From: Paolo Bonzini Openpgp: preference=signencrypt Message-ID: <633cc3f7-eb20-1bfe-03d2-e481be188eb1@redhat.com> Date: Wed, 17 Jul 2019 15:52:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <50befb09-d381-4362-9cd1-6fb11c96a719@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.128.67 Subject: Re: [Qemu-devel] [qemu-s390x] [RFC PATCH 1/3] hw/Kconfig: PCI bus implies PCI_DEVICES 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 , Palmer Dabbelt , "open list:RISC-V" , Eduardo Habkost , Sagar Karandikar , "Michael S. Tsirkin" , Helge Deller , Cornelia Huck , Mark Cave-Ayland , QEMU Developers , Aurelien Jarno , "open list:S390" , qemu-arm , Alistair Francis , Gerd Hoffmann , qemu-ppc , Richard Henderson , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , Artyom Tarasenko , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 17/07/19 14:59, Collin Walling wrote: > On 7/16/19 11:04 AM, Thomas Huth wrote: >> On 16/07/2019 15.06, Markus Armbruster wrote: >>> Paolo Bonzini writes: >>> >>>> On 15/07/19 18:12, Cornelia Huck wrote: >>>>>> Is it INTx vs. MSI vs. MSI-X? >>>>> >>>>> I think for s390x we need (INTx || MSI) vs MSI-X... >>>> >>>> I think MSI vs MSI-X is just how it's configured, not the actual >>>> behavior, so it should be irrelevant. >>> >>> My best guesses from confusing information, please correct >>> misunderstandings: >>> >>> 1. PCI devices need to support MSI or MSI-X to work with s390x. >> >> I think Cornelia mentioned that we might even require MSI-X there ... >> Collin (being listed as "S390 PCI" maintainer), can you confirm? > > MSI-X is mandatory for PCI devices in the s390 architecture. How are MSI and MSI-X distinguished? Paolo