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由 Mark Cave-Ayland 提交于
The IOMMU flush register is a write-only register used to remove entries from the hardware TLB. Allow guest writes to this register as a no-op, and return a value of 0 for reads. This fixes IOMMU DMA operations under NetBSD SPARC64. Signed-off-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
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