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| author | Jerry Snitselaar <jsnitsel@redhat.com> | 2019-12-12 22:36:42 -0700 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-12-17 11:48:18 +0100 |
| commit | cde9319e884eb6267a0df446f3c131fe1108defb (patch) | |
| tree | 21b9617bff42b829b02a047ecadb476066c1d212 /drivers/iommu | |
| parent | d360211524bece6db9920f32c91808235290b51c (diff) | |
| download | lwn-cde9319e884eb6267a0df446f3c131fe1108defb.tar.gz lwn-cde9319e884eb6267a0df446f3c131fe1108defb.zip | |
iommu/vt-d: Allocate reserved region for ISA with correct permission
Currently the reserved region for ISA is allocated with no
permissions. If a dma domain is being used, mapping this region will
fail. Set the permissions to DMA_PTE_READ|DMA_PTE_WRITE.
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: stable@vger.kernel.org # v5.3+
Fixes: d850c2ee5fe2 ("iommu/vt-d: Expose ISA direct mapping region via iommu_get_resv_regions")
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c8ced7712a8e..42966611a192 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5728,7 +5728,7 @@ static void intel_iommu_get_resv_regions(struct device *device, struct pci_dev *pdev = to_pci_dev(device); if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) { - reg = iommu_alloc_resv_region(0, 1UL << 24, 0, + reg = iommu_alloc_resv_region(0, 1UL << 24, prot, IOMMU_RESV_DIRECT_RELAXABLE); if (reg) list_add_tail(®->list, head); |