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[142.68.80.239]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6b04f655121sm17491526d6.30.2024.06.07.07.23.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Jun 2024 07:23:22 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1sFaV0-00H9uo-5V; Fri, 07 Jun 2024 11:23:22 -0300 Date: Fri, 7 Jun 2024 11:23:22 -0300 From: Jason Gunthorpe To: Niklas Schnelle Cc: Alex Williamson , Christian Borntraeger , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Sven Schnelle , Gerd Bayer , Matthew Rosato , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [PATCH v3 0/3] vfio/pci: s390: Fix issues preventing VFIO_PCI_MMAP=y for s390 and enable it Message-ID: <20240607142322.GF791043@ziepe.ca> References: <20240529-vfio_pci_mmap-v3-0-cd217d019218@linux.ibm.com> <0a4622ce-3826-4b08-ab81-375887ab6a46@linux.ibm.com> <20240606112718.0171f5b3.alex.williamson@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Fri, Jun 07, 2024 at 09:47:08AM +0200, Niklas Schnelle wrote: > I trust your judgement and was unsure too. I think for the > s390_mmio_read/write syscalls the only existing users out there are via > rdma-core, so unless Jason tells us that he thinks they could also be > affected by the lack of page fault handling I see no problem in going > upstream only. rdma doesn't use the fault path for the doorbell mmio. Jason