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  1. 18 5月, 2009 3 次提交
  3. 11 5月, 2009 2 次提交
    • D
      intel-iommu: Clean up handling of "caching mode" vs. IOTLB flushing. · 1f0ef2aa
      由 David Woodhouse 提交于 
      As we just did for context cache flushing, clean up the logic around
whether we need to flush the iotlb or just the write-buffer, depending
on caching mode.

Fix the same bug in qi_flush_iotlb() that qi_flush_context() had -- it
isn't supposed to be returning an error; it's supposed to be returning a
flag which triggers a write-buffer flush.

Remove some superfluous conditional write-buffer flushes which could
never have happened because they weren't for non-present-to-present
mapping changes anyway.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      1f0ef2aa
    • D
      intel-iommu: Clean up handling of "caching mode" vs. context flushing. · 4c25a2c1
      由 David Woodhouse 提交于 
      It really doesn't make a lot of sense to have some of the logic to
handle caching vs. non-caching mode duplicated in qi_flush_context() and
__iommu_flush_context(), while the return value indicates whether the
caller should take other action which depends on the same thing.

Especially since qi_flush_context() thought it was returning something
entirely different anyway.

This patch makes qi_flush_context() and __iommu_flush_context() both
return void, removes the 'non_present_entry_flush' argument and makes
the only call site which _set_ that argument to 1 do the right thing.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      4c25a2c1
  5. 29 4月, 2009 1 次提交
    • F
      Intel IOMMU Pass Through Support · 4ed0d3e6
      由 Fenghua Yu 提交于 
      The patch adds kernel parameter intel_iommu=pt to set up pass through
mode in context mapping entry. This disables DMAR in linux kernel; but
KVM still runs on VT-d and interrupt remapping still works.

In this mode, kernel uses swiotlb for DMA API functions but other VT-d
functionalities are enabled for KVM. KVM always uses multi level
translation page table in VT-d. By default, pass though mode is disabled
in kernel.

This is useful when people don't want to enable VT-d DMAR in kernel but
still want to use KVM and interrupt remapping for reasons like DMAR
performance concern or debug purpose.
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Acked-by: NWeidong Han <weidong@intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      4ed0d3e6
  7. 04 4月, 2009 2 次提交
  9. 24 3月, 2009 1 次提交
  11. 18 3月, 2009 2 次提交
  13. 09 2月, 2009 1 次提交
  15. 29 1月, 2009 1 次提交
  17. 06 1月, 2009 1 次提交
  19. 03 1月, 2009 8 次提交
  21. 18 10月, 2008 1 次提交
  23. 17 10月, 2008 2 次提交
  25. 15 10月, 2008 1 次提交
  27. 12 7月, 2008 8 次提交
  29. 24 2月, 2008 1 次提交
  31. 09 2月, 2008 1 次提交
  33. 07 2月, 2008 1 次提交
  35. 29 10月, 2007 1 次提交
  37. 22 10月, 2007 2 次提交