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[35.185.200.132]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2df6a5eea15sm15475075ad.64.2026.09.23.11.26.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Sep 2026 11:26:10 -0700 (PDT) Date: Wed, 23 Sep 2026 18:26:06 +0000 From: David Matlack To: Jason Gunthorpe Cc: Alex Williamson , Fuad Tabba , Joey Gouly , kvm@vger.kernel.org, kvmarm@lists.linux.dev, Leon Romanovsky , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, linux-rdma@vger.kernel.org, Marc Zyngier , Mark Bloch , netdev@vger.kernel.org, Oliver Upton , Paolo Bonzini , Saeed Mahameed , Sean Christopherson , Steffen Eiden , Shuah Khan , Suzuki K Poulose , Tariq Toukan , Zenghui Yu , patches@lists.linux.dev Subject: Re: [PATCH v7 06/10] vfio: selftests: Allow drivers to specify required region size Message-ID: References: <0-v7-c6d30e8ce1e4+3dfa6-mlx5st_jgg@nvidia.com> <6-v7-c6d30e8ce1e4+3dfa6-mlx5st_jgg@nvidia.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6-v7-c6d30e8ce1e4+3dfa6-mlx5st_jgg@nvidia.com> On 2026-09-21 07:35 PM, Jason Gunthorpe wrote: > Add a region_size field to struct vfio_pci_driver_ops so drivers can > declare how much DMA-mapped region they need. The mlx5 driver will need > ~18MB for firmware pages. Existing drivers pass in the sizeof their state > struct. Since drivers all use only their declared state we can use the > value directly and remove the SZ_2M hard coding. > > Assisted-by: Claude:claude-opus-4.6 > Signed-off-by: Jason Gunthorpe Reviewed-by: David Matlack