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authorJoerg Roedel <joerg.roedel@amd.com>2010-09-23 15:15:19 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2010-09-23 16:26:03 +0200
commit4c894f47bb49284008073d351c0ddaac8860864e (patch)
tree4f14600bbc3a7b9c22dfb667edebba736e7e3ca9 /include
parente9bf51971157e367aabfc111a8219db010f69cd4 (diff)
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x86/amd-iommu: Work around S3 BIOS bug
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. Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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 10d33309e9a..570fddeb038 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