Patch "iommu/vt-d: Allocate reserved region for ISA with correct permission" has been added to the 5.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    iommu/vt-d: Allocate reserved region for ISA with correct permission

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     iommu-vt-d-allocate-reserved-region-for-isa-with-correct-permission.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


From cde9319e884eb6267a0df446f3c131fe1108defb Mon Sep 17 00:00:00 2001
From: Jerry Snitselaar <jsnitsel@redhat.com>
Date: Thu, 12 Dec 2019 22:36:42 -0700
Subject: iommu/vt-d: Allocate reserved region for ISA with correct permission

From: Jerry Snitselaar <jsnitsel@redhat.com>

commit cde9319e884eb6267a0df446f3c131fe1108defb upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iommu/intel-iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5697,7 +5697,7 @@ static void intel_iommu_get_resv_regions
 		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(&reg->list, head);


Patches currently in stable-queue which might be from jsnitsel@redhat.com are

queue-5.4/iommu-fix-kasan-use-after-free-in-iommu_insert_resv_region.patch
queue-5.4/iommu-vt-d-fix-dmar-pte-read-access-not-set-error.patch
queue-5.4/iommu-set-group-default-domain-before-creating-direct-mappings.patch
queue-5.4/tpm_tis-reserve-chip-for-duration-of-tpm_tis_core_init.patch
queue-5.4/iommu-vt-d-allocate-reserved-region-for-isa-with-correct-permission.patch
queue-5.4/iommu-vt-d-set-isa-bridge-reserved-region-as-relaxable.patch
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