x86/amd-iommu: Flush all internal TLBs when IOMMUs are enabled

Browse source

The old code only flushed a DTE or a domain TLB before it is
actually used by the IOMMU driver. While this is efficient
and works when done right it is more likely to introduce new
bugs when changing code (which happened in the past).
This patch adds code to flush all DTEs and all domain TLBs
in each IOMMU right after it is enabled (at boot and after
resume). This reduces the complexity of the driver and makes
it less likely to introduce stale-TLB bugs in the future.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

...

This commit is contained in:

Joerg Roedel 2011-04-07 08:16:10 +02:00

parent d8c1308577

commit 7d0c5cc5be

3 changed files with 43 additions and 45 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

arch/x86/include/asm/amd_iommu_proto.h

View file

75

arch/x86/kernel/amd_iommu.c

View file

11

arch/x86/kernel/amd_iommu_init.c

View file