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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2008-12-02 20:16:03 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-12-02 20:25:52 +0100 |
| commit | dcb7731a185efbf3d800618d874af99895df5afb (patch) | |
| tree | 8730ff765213c91ba65da2520fa0e82178509f0e /kernel/trace/trace_branch.c | |
| parent | x86: fix dma_mapping_error for 32bit x86, cleanup (diff) | |
| download | wireguard-linux-dcb7731a185efbf3d800618d874af99895df5afb.tar.xz wireguard-linux-dcb7731a185efbf3d800618d874af99895df5afb.zip | |
x86: fix broken flushing in GART nofullflush path
Impact: remove stale IOTLB entries
In the non-default nofullflush case the GART is only flushed when
next_bit wraps around. But it can happen that an unmap operation unmaps
memory which is behind the current next_bit location. If these addresses
are reused it may result in stale GART IO/TLB entries. Fix this by
setting the GART next_bit always behind an unmapped location.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_branch.c')
0 files changed, 0 insertions, 0 deletions