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-rw-r--r--drivers/pci/intel-iommu.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index beb5ccf..d36fa80 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1974,6 +1974,17 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev,
printk(KERN_INFO
"IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
pci_name(pdev), start, end);
+
+ if (end >> agaw_to_width(domain->agaw)) {
+ WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ agaw_to_width(domain->agaw),
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ ret = -EIO;
+ goto error;
+ }
ret = iommu_domain_identity_map(domain, start, end);
if (ret)
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