iommu/amd: Work around wrong IOAPIC device-id in IVRS table

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On some systems the BIOS puts the wrong device-id for the
IO-APIC into the IVRS table. The result is that interrupt
remapping is not working for the IO-APIC irqs. This usually
means a kernel panic at boot because the timer is not
working.
Fix this kernel panic by disabling interrupt remapping if
this problem is discovered in the IVRS table.

Reported-by: Andrew Oakley <andrew@ado.is-a-geek.net>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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This commit is contained in:

Joerg Roedel 2012-10-16 14:52:51 +02:00

parent ddffeb8c4d

commit c2ff5cf529

1 changed files with 32 additions and 7 deletions

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39

drivers/iommu/amd_iommu_init.c

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