From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Joerg Roedel <jroedel@suse.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, iommu@lists.linux-foundation.org
Subject: [PATCH 5.4 371/434] iommu/vt-d: Allocate reserved region for ISA with correct permission
Date: Sun, 29 Dec 2019 18:27:04 +0100 [thread overview]
Message-ID: <20191229172726.637712160@linuxfoundation.org> (raw)
In-Reply-To: <20191229172702.393141737@linuxfoundation.org>
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(®->list, head);
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prev parent reply other threads:[~2019-12-29 17:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191229172702.393141737@linuxfoundation.org>
2019-12-29 17:27 ` [PATCH 5.4 368/434] iommu: set group default domain before creating direct mappings Greg Kroah-Hartman
2019-12-29 17:27 ` Greg Kroah-Hartman [this message]
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