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| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-08-26 14:25:41 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-08-26 14:25:41 +0100 |
| commit | 2ff729f5445cc47d1910386c36e53fc6b1c5e47a (patch) | |
| tree | b94951ac7215f36399395e0e1f34374251bc0d11 | |
| parent | 94a91b5051a77d8a71d4f11a3240f0d9c51b6cf2 (diff) | |
| download | op-kernel-dev-2ff729f5445cc47d1910386c36e53fc6b1c5e47a.zip op-kernel-dev-2ff729f5445cc47d1910386c36e53fc6b1c5e47a.tar.gz | |
intel-iommu: Cope with yet another BIOS screwup causing crashes
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/pci/intel-iommu.c | 11 |
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) |
