diff options
| author | Shivaprasad G Bhat <sbhat@linux.ibm.com> | 2024-06-24 12:38:58 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-12 11:11:31 +0200 |
| commit | 4ef01846c686d3638c7093195392de13f9ae70e6 (patch) | |
| tree | 0f3c279b9f3597beee7203b4ef5273fe29e058b1 /drivers/pci/controller/dwc | |
| parent | 4676bacc6eafe1ad53413c3e42781cd324550c4b (diff) | |
vfio/spapr: Always clear TCEs before unsetting the window
[ Upstream commit 4ba2fdff2eb174114786784926d0efb6903c88a6 ]
The PAPR expects the TCE table to have no entries at the time of
unset window(i.e. remove-pe). The TCE clear right now is done
before freeing the iommu table. On pSeries, the unset window
makes those entries inaccessible to the OS and the H_PUT/GET calls
fail on them with H_CONSTRAINED.
On PowerNV, this has no side effect as the TCE clear can be done
before the DMA window removal as well.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/171923273535.1397.1236742071894414895.stgit@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pci/controller/dwc')
0 files changed, 0 insertions, 0 deletions