diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2020-11-18 18:58:09 +0000 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2021-06-30 08:47:16 -0400 |
| commit | bd5d4df4dcc1f2d1ceac7b167df1e699a7f6deb7 (patch) | |
| tree | fced94e77c61163089cb7abdf4098748719c5599 /drivers/spi | |
| parent | 3bbdf5a6fcd2467a8e4854c6dba320369713bd0c (diff) | |
arm64: Ignore any DMA offsets in the max_zone_phys() calculation
commit 791ab8b2e3db0c6e4295467d10398800ec29144c upstream.
Currently, the kernel assumes that if RAM starts above 32-bit (or
zone_bits), there is still a ZONE_DMA/DMA32 at the bottom of the RAM and
such constrained devices have a hardwired DMA offset. In practice, we
haven't noticed any such hardware so let's assume that we can expand
ZONE_DMA32 to the available memory if no RAM below 4GB. Similarly,
ZONE_DMA is expanded to the 4GB limit if no RAM addressable by
zone_bits.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20201118185809.1078362-1-catalin.marinas@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spi')
0 files changed, 0 insertions, 0 deletions