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 <sta...@vger.kernel.org> know about it.
>From cde9319e884eb6267a0df446f3c131fe1108defb Mon Sep 17 00:00:00 2001
From: Jerry Snitselaar <jsnit...@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 <jsnit...@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 <jroe...@suse.de>
Cc: Lu Baolu <baolu...@linux.intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: sta...@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 <jsnit...@redhat.com>
Acked-by: Lu Baolu <baolu...@linux.intel.com>
Signed-off-by: Joerg Roedel <jroe...@suse.de>
Signed-off-by: Greg Kroah-Hartman <gre...@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(®->list, head);
Patches currently in stable-queue which might be from jsnit...@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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