1. 12 8月, 2015 17 次提交
  2. 03 8月, 2015 3 次提交
  3. 31 7月, 2015 1 次提交
  4. 30 7月, 2015 5 次提交
  5. 23 7月, 2015 1 次提交
    • A
      iommu/vt-d: Fix VM domain ID leak · 46ebb7af
      Alex Williamson 提交于
      This continues the attempt to fix commit fb170fb4 ("iommu/vt-d:
      Introduce helper functions to make code symmetric for readability").
      The previous attempt in commit 71684406 ("iommu/vt-d: Detach
      domain *only* from attached iommus") overlooked the fact that
      dmar_domain.iommu_bmp gets cleared for VM domains when devices are
      detached:
      
      intel_iommu_detach_device
        domain_remove_one_dev_info
          domain_detach_iommu
      
      The domain is detached from the iommu, but the iommu is still attached
      to the domain, for whatever reason.  Thus when we get to domain_exit(),
      we can't rely on iommu_bmp for VM domains to find the active iommus,
      we must check them all.  Without that, the corresponding bit in
      intel_iommu.domain_ids doesn't get cleared and repeated VM domain
      creation and destruction will run out of domain IDs.  Meanwhile we
      still can't call iommu_detach_domain() on arbitrary non-VM domains or
      we risk clearing in-use domain IDs, as 71684406 attempted to
      address.
      
      It's tempting to modify iommu_detach_domain() to test the domain
      iommu_bmp, but the call ordering from domain_remove_one_dev_info()
      prevents it being able to work as fb170fb4 seems to have intended.
      Caching of unused VM domains on the iommu object seems to be the root
      of the problem, but this code is far too fragile for that kind of
      rework to be proposed for stable, so we simply revert this chunk to
      its state prior to fb170fb4.
      
      Fixes: fb170fb4 ("iommu/vt-d: Introduce helper functions to make
                            code symmetric for readability")
      Fixes: 71684406 ("iommu/vt-d: Detach domain *only* from attached
                            iommus")
      Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
      Cc: Jiang Liu <jiang.liu@linux.intel.com>
      Cc: stable@vger.kernel.org # v3.17+
      Signed-off-by: NJoerg Roedel <jroedel@suse.de>
      46ebb7af
  6. 09 7月, 2015 5 次提交
  7. 01 7月, 2015 1 次提交
  8. 30 6月, 2015 3 次提交
  9. 19 6月, 2015 1 次提交
  10. 16 6月, 2015 3 次提交