Messages in this thread | | | Date | Wed, 28 Feb 2018 19:17:38 +0200 | From | "Michael S. Tsirkin" <> | Subject | Re: [PATCH v15 11/11] RFC: fw_cfg: do DMA read operation |
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On Wed, Feb 28, 2018 at 04:41:51PM +0100, Marc-André Lureau wrote: > I don't know if it's always safe to enable dma in read_raw(), how > could we know? Is there a check we could use to choose one or ther > other (and thus avoiding explicit dma/readfn argument)?
IMHO the way to go is not to try to do zero copy. Allocate a buffer and DMA there, then copy.
-- MST
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