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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2009-03-17 01:04:57 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2009-03-17 23:39:58 +0100 |
| commit | 1531a6a6b81a4e6f9eec9a5608758a6ea14b96e0 (patch) | |
| tree | 3b1523516192fdd19b286879376b4d3d7c827b0d /drivers/pci/intr_remapping.c | |
| parent | x86, dmar: routines for disabling queued invalidation and intr remapping (diff) | |
| download | linux-1531a6a6b81a4e6f9eec9a5608758a6ea14b96e0.tar.xz linux-1531a6a6b81a4e6f9eec9a5608758a6ea14b96e0.zip | |
x86, dmar: start with sane state while enabling dma and interrupt-remapping
Impact: cleanup/sanitization
Start from a sane state while enabling dma and interrupt-remapping, by
clearing the previous recorded faults and disabling previously
enabled queued invalidation and interrupt-remapping.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'drivers/pci/intr_remapping.c')
| -rw-r--r-- | drivers/pci/intr_remapping.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c index 0d202d73a1ac..a84686b2478b 100644 --- a/drivers/pci/intr_remapping.c +++ b/drivers/pci/intr_remapping.c @@ -499,6 +499,23 @@ int __init enable_intr_remapping(int eim) struct dmar_drhd_unit *drhd; int setup = 0; + for_each_drhd_unit(drhd) { + struct intel_iommu *iommu = drhd->iommu; + + /* + * Clear previous faults. + */ + dmar_fault(-1, iommu); + + /* + * Disable intr remapping and queued invalidation, if already + * enabled prior to OS handover. + */ + disable_intr_remapping(iommu); + + dmar_disable_qi(iommu); + } + /* * check for the Interrupt-remapping support */ |