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The radeon driver restricts the MSI message address for devices older than the BONAIR generation to 32-bit MSI addresses due to the former restrictions of the PCI/MSI code which only allowed either 32-bit or full 64-bit address range. This does not work on platforms which have a MSI doorbell address above the 32-bit boundary but do not support the full 64 bit address range. The PCI/MSI core converted this binary decision to a DMA_BIT_MASK() based decision, which allows to describe the device limitations precisely. Convert the driver to provide the exact DMA address limitations to the PCI/MSI core. That allows devices which do not support the full 64-bit address space to work on platforms which have a MSI doorbell address above the 32-bit limit as long as it is within the hardware's addressable range. [ tglx: Massage changelog ] Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patch.msgid.link/20260129-pci-msi-addr-mask-v4-3-70da998f2750@iscas.ac.cn