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[34.127.9.76]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-352678af465sm86170a91.11.2026.01.14.09.52.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jan 2026 09:52:19 -0800 (PST) Date: Wed, 14 Jan 2026 17:52:15 +0000 From: David Matlack To: Alex Mastro Cc: Alex Williamson , Shuah Khan , Peter Xu , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, Jason Gunthorpe Subject: Re: [PATCH v2 3/3] vfio: selftests: Add vfio_dma_mapping_mmio_test Message-ID: References: <20260113-map-mmio-test-v2-0-e6d34f09c0bb@fb.com> <20260113-map-mmio-test-v2-3-e6d34f09c0bb@fb.com> Precedence: bulk X-Mailing-List: linux-kselftest@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: <20260113-map-mmio-test-v2-3-e6d34f09c0bb@fb.com> On 2026-01-13 03:08 PM, Alex Mastro wrote: > +FIXTURE_SETUP(vfio_dma_mapping_mmio_test) > +{ > + self->iommu = iommu_init(variant->iommu_mode); > + self->device = vfio_pci_device_init(device_bdf, self->iommu); > + self->iova_allocator = iova_allocator_init(self->iommu); > + self->bar = largest_mapped_bar(self->device); > + > + if (!self->bar) > + SKIP(return, "No mappable BAR found on device %s", device_bdf); > + > + if (self->bar->info.size < 2 * getpagesize()) > + SKIP(return, "BAR too small (size=0x%llx)", self->bar->info.size); It seems like the selftest should only skip map_partial_bar if the BAR is less than 2 pages. map_full_bar would still be a valid test to run.