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android_kernel_motorola_sm6225/arch/powerpc
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Mike Rapoport 055b4a62f1 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>
2020-01-12 12:17:14 +01:00
..
boot libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h 2020-01-04 19:13:15 +01:00
configs powerpc/mm/radix: Make Radix require HUGETLB_PAGE 2019-05-02 09:58:55 +02:00
crypto powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
include KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag 2020-01-09 10:19:08 +01:00
kernel KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag 2020-01-09 10:19:08 +01:00
kvm KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag 2020-01-09 10:19:08 +01:00
lib powerpc/64: Fix memcmp reading past the end of src/dest 2019-04-03 06:26:29 +02:00
math-emu
mm powerpc: Ensure that swiotlb buffer is allocated from low memory 2020-01-12 12:17:14 +01:00
net powerpc/bpf: Fix tail call implementation 2019-12-05 09:19:39 +01:00
oprofile
perf powerpc/perf: Fix unit_sel/cache_sel checks 2019-12-05 09:20:41 +01:00
platforms KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag 2020-01-09 10:19:08 +01:00
purgatory powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
sysdev KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag 2020-01-09 10:19:08 +01:00
tools powerpc/tools: Don't quote $objdump in scripts 2020-01-04 19:12:42 +01:00
xmon powerpc: Avoid clang warnings around setjmp and longjmp 2019-12-17 20:35:40 +01:00
Kconfig powerpc: disable support for relative ksymtab references 2018-08-29 16:12:07 -07:00
Kconfig.debug
Makefile powerpc: Don't add -mabi= flags when building with Clang 2020-01-04 19:13:10 +01:00
Makefile.postlink