From: Jerry Snitselaar Date: Fri, 13 Dec 2019 05:36:42 +0000 (-0700) Subject: iommu/vt-d: Allocate reserved region for ISA with correct permission X-Git-Tag: v5.10.7~3603^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cde9319e884eb6267a0df446f3c131fe1108defb;p=platform%2Fkernel%2Flinux-rpi.git 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 Cc: Lu Baolu 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 Acked-by: Lu Baolu Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c8ced771..4296661 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);