diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2014-06-09 14:09:53 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-07-11 13:33:59 +0100 |
| commit | fac90e80d8e567113477de8f1ce91e2e3410ac57 (patch) | |
| tree | 6c1d6a0afab36c23b002ff7c9f1f1c8e8e3df9b5 /drivers | |
| parent | 30c7c6dfd9c8a42aacd6d0d61d2209bc13abbfa3 (diff) | |
iommu/vt-d: Fix missing IOTLB flush in intel_iommu_unmap()
Part of commit ea8ea460c9ace60bbb5ac6e5521d637d5c15293d upstream.
This missing IOTLB flush was added as a minor, inconsequential bug-fix
in commit ea8ea460c ("iommu/vt-d: Clean up and fix page table clear/free
behaviour") in 3.15. It wasn't originally intended for -stable but a
couple of users have reported issues which turn out to be fixed by
adding the missing flush.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
[bwh: Backported to 3.2:
- Adjust context
- Use &dmar_domain->iommu_bmp, as it is a single word not an array]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 1a51b3d9ebb..bb1e5792674 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4070,7 +4070,7 @@ static int intel_iommu_unmap(struct iommu_domain *domain, { struct dmar_domain *dmar_domain = domain->priv; size_t size = PAGE_SIZE << gfp_order; - int order; + int order, iommu_id; order = dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT, (iova + size - 1) >> VTD_PAGE_SHIFT); @@ -4078,6 +4078,22 @@ static int intel_iommu_unmap(struct iommu_domain *domain, if (dmar_domain->max_addr == iova + size) dmar_domain->max_addr = iova; + for_each_set_bit(iommu_id, &dmar_domain->iommu_bmp, g_num_of_iommus) { + struct intel_iommu *iommu = g_iommus[iommu_id]; + int num, ndomains; + + /* + * find bit position of dmar_domain + */ + ndomains = cap_ndoms(iommu->cap); + for_each_set_bit(num, iommu->domain_ids, ndomains) { + if (iommu->domains[num] == dmar_domain) + iommu_flush_iotlb_psi(iommu, num, + iova >> VTD_PAGE_SHIFT, + 1 << order, 0); + } + } + return order; } |