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| author | Joerg Roedel <joerg.roedel@amd.com> | 2009-10-09 18:31:20 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-10-09 18:37:46 +0200 |
| commit | c5cca146aa03e1f60fb179df65f0dbaf17bc64ed (patch) | |
| tree | 457cdf7d8b3a12f58328d06a2bfd8665b395b9ba /arch/x86/include/asm/amd_iommu.h | |
| parent | c7084b35eb1a4d3353a501508baf9d3d82822c93 (diff) | |
| download | linux-c5cca146aa03e1f60fb179df65f0dbaf17bc64ed.tar.gz linux-c5cca146aa03e1f60fb179df65f0dbaf17bc64ed.tar.bz2 linux-c5cca146aa03e1f60fb179df65f0dbaf17bc64ed.zip | |
x86/amd-iommu: Workaround for erratum 63
There is an erratum for IOMMU hardware which documents
undefined behavior when forwarding SMI requests from
peripherals and the DTE of that peripheral has a sysmgt
value of 01b. This problem caused weird IO_PAGE_FAULTS in my
case.
This patch implements the suggested workaround for that
erratum into the AMD IOMMU driver. The erratum is
documented with number 63.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/include/asm/amd_iommu.h')
| -rw-r--r-- | arch/x86/include/asm/amd_iommu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/amd_iommu.h b/arch/x86/include/asm/amd_iommu.h index bdf96f119f06..9dbd4030f0cd 100644 --- a/arch/x86/include/asm/amd_iommu.h +++ b/arch/x86/include/asm/amd_iommu.h @@ -30,6 +30,7 @@ extern irqreturn_t amd_iommu_int_handler(int irq, void *data); extern void amd_iommu_flush_all_domains(void); extern void amd_iommu_flush_all_devices(void); extern void amd_iommu_shutdown(void); +extern void amd_iommu_apply_erratum_63(u16 devid); #else static inline int amd_iommu_init(void) { return -ENODEV; } static inline void amd_iommu_detect(void) { } |