02 Jul, 2009
1 commit
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This fixes kernel.org bug #13584. The IOVA code attempted to optimise
the insertion of new ranges into the rbtree, with the unfortunate result
that some ranges just didn't get inserted into the tree at all. Then
those ranges would be handed out more than once, and things kind of go
downhill from there.Introduced after 2.6.25 by ddf02886cbe665d67ca750750196ea5bf524b10b
("PCI: iova RB tree setup tweak").Signed-off-by: David Woodhouse
Cc: mark gross
Cc: Andrew Morton
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds
15 Oct, 2008
1 commit
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This patch extends the VT-d driver to support KVM
[Ben: fixed memory pinning]
[avi: move dma_remapping.h as well]Signed-off-by: Kay, Allen M
Signed-off-by: Weidong Han
Signed-off-by: Ben-Ami Yassour
Signed-off-by: Amit Shah
Acked-by: Mark Gross
Signed-off-by: Avi Kivity
21 Apr, 2008
1 commit
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The following patch merges two functions into one allowing for a 3%
reduction in overhead in locating, allocating and inserting pages for
use in IOMMU operations.Its a bit of a eye-crosser so I welcome any RB-tree / MM experts to take
a look. It works by re-using some of the information gathered in the
search for the pages to use in setting up the IOTLB's in the insertion
of the iova structure into the RB tree.Signed-off-by:
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman
24 Feb, 2008
1 commit
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The following is a clean up and correction of the copyright holding
entities for the files associated with the intel iommu code.Signed-off-by:
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Feb, 2008
1 commit
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I would like to potentially move the sparc64 IOMMU code over to using
the nice new drivers/pci/iova.[ch] code for free area management..In order to do that we have to detach the IOMMU page size assumptions
which only really need to exist in the intel-iommu.[ch] code.This patch attempts to implement that.
[akpm@linux-foundation.org: build fix]
Signed-off-by: David S. Miller
Acked-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Oct, 2007
2 commits
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This patch adds PageSelectiveInvalidation support replacing existing
DomainSelectiveInvalidation for intel_{map/unmap}_sg() calls and also
enables to mapping one big contiguous DMA virtual address which is mapped
to discontiguous physical address for SG map/unmap calls."Doamin selective invalidations" wipes out the IOMMU address translation
cache based on domain ID where as "Page selective invalidations" wipes out
the IOMMU address translation cache for that address mask range which is
more cache friendly when compared to Domain selective invalidations.Here is how it is done.
1) changes to iova.c
alloc_iova() now takes a bool size_aligned argument, which
when when set, returns the io virtual address that is
naturally aligned to 2 ^ x, where x is the order
of the size requested.Returning this io vitual address which is naturally
aligned helps iommu to do the "page selective
invalidations" which is IOMMU cache friendly
over "domain selective invalidations".2) Changes to driver/pci/intel-iommu.c
Clean up intel_{map/unmap}_{single/sg} () calls so that
s/g map/unamp calls is no more dependent on
intel_{map/unmap}_single()intel_map_sg() now computes the total DMA virtual address
required and allocates the size aligned total DMA virtual address
and maps the discontiguous physical address to the allocated
contiguous DMA virtual address.In the intel_unmap_sg() case since the DMA virtual address
is contiguous and size_aligned, PageSelectiveInvalidation
is used replacing earlier DomainSelectiveInvalidations.Signed-off-by: Anil S Keshavamurthy
Cc: Greg KH
Cc: Ashok Raj
Cc: Suresh B
Cc: Andi Kleen
Cc: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This code implements a generic IOVA allocation and management. As per Dave's
suggestion we are now allocating IO virtual address from Higher DMA limit
address rather than lower end address and this eliminated the need to preserve
the IO virtual address for multiple devices sharing the same domain virtual
address.Also this code uses red black trees to store the allocated and reserved iova
nodes. This showed a good performance improvements over previous linear
linked list.[akpm@linux-foundation.org: remove inlines]
[akpm@linux-foundation.org: coding style fixes]
Signed-off-by: Anil S Keshavamurthy
Cc: Andi Kleen
Cc: Peter Zijlstra
Cc: Muli Ben-Yehuda
Cc: "Siddha, Suresh B"
Cc: Arjan van de Ven
Cc: Ashok Raj
Cc: "David S. Miller"
Cc: Christoph Lameter
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
