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authorJoerg Roedel <joerg.roedel@amd.com>2010-09-23 15:15:19 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-28 21:43:57 -0700
commit9be2cbb804d686835ce738ea633d9517b9735c39 (patch)
tree008e14560c9da772db33d9d74a48476e22f78fdc /include
parenta294ba6d5420b899e03daa18eb2dc5c25807e2ce (diff)
x86/amd-iommu: Work around S3 BIOS bug
commit 4c894f47bb49284008073d351c0ddaac8860864e upstream. This patch adds a workaround for an IOMMU BIOS problem to the AMD IOMMU driver. The result of the bug is that the IOMMU does not execute commands anymore when the system comes out of the S3 state resulting in system failure. The bug in the BIOS is that is does not restore certain hardware specific registers correctly. This workaround reads out the contents of these registers at boot time and restores them on resume from S3. The workaround is limited to the specific IOMMU chipset where this problem occurs. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/pci_ids.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 67325bfc803e..07ed6842e317 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -393,6 +393,9 @@
#define PCI_DEVICE_ID_VLSI_82C147 0x0105
#define PCI_DEVICE_ID_VLSI_VAS96011 0x0702
+/* AMD RD890 Chipset */
+#define PCI_DEVICE_ID_RD890_IOMMU 0x5a23
+
#define PCI_VENDOR_ID_ADL 0x1005
#define PCI_DEVICE_ID_ADL_2301 0x2301