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intel-iommu: Cope with yet another BIOS screwup causing crashes

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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-08-26 14:25:41 +01:00
parent 94a91b5051
commit 2ff729f544
1 changed files with 11 additions and 0 deletions
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11
drivers/pci/intel-iommu.c
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@ -1975,6 +1975,17 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev,
"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)
goto error;