diff options
| author | Mike Rapoport <rppt@linux.ibm.com> | 2019-12-04 14:35:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-12 11:22:48 +0100 |
| commit | 49961c94b0ee118e5db5fa61e261c136579054aa (patch) | |
| tree | ff55b4b134b7e28568d9bdbe1079968193e0031e /scripts/objdiff | |
| parent | 6c7e764753f6e87d3c4436f34ac81fc4211afed9 (diff) | |
powerpc: Ensure that swiotlb buffer is allocated from low memory
[ Upstream commit 8fabc623238e68b3ac63c0dd1657bf86c1fa33af ]
Some powerpc platforms (e.g. 85xx) limit DMA-able memory way below 4G.
If a system has more physical memory than this limit, the swiotlb
buffer is not addressable because it is allocated from memblock using
top-down mode.
Force memblock to bottom-up mode before calling swiotlb_init() to
ensure that the swiotlb buffer is DMA-able.
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191204123524.22919-1-rppt@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/objdiff')
0 files changed, 0 insertions, 0 deletions