Kernel Newbies Archive on
 help / color / Atom feed
* Controlling IOVA addresses generated by IOMMU
@ 2021-04-07 20:56 Sadanand Warrier
  0 siblings, 0 replies; only message in thread
From: Sadanand Warrier @ 2021-04-07 20:56 UTC (permalink / raw)
  To: kernelnewbies

[-- Attachment #1.1: Type: text/plain, Size: 354 bytes --]

   Is there any kernel API or control mechanism for an IO-MMU that one
could use to specify that a buffer earmarked for DMA would always have an
IOVA greater than 4GB?
Basically if I used pci_map_sg and passed a scatter list I would like the
dma_address field in the scatterlist structure to be always greater than
4GB when it returned.



[-- Attachment #1.2: Type: text/html, Size: 461 bytes --]

[-- Attachment #2: Type: text/plain, Size: 170 bytes --]

Kernelnewbies mailing list

^ permalink raw reply	[flat|nested] only message in thread

only message in thread, back to index

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-07 20:56 Controlling IOVA addresses generated by IOMMU Sadanand Warrier

Kernel Newbies Archive on

Archives are clonable:
	git clone --mirror kernelnewbies/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kernelnewbies kernelnewbies/ \
	public-inbox-index kernelnewbies

Example config snippet for mirrors

Newsgroup available over NNTP:

AGPL code for this site: git clone