Christoph Hellwig 10314e09d0 riscv: add swiotlb support ... All RISC-V platforms today lack an IOMMU. However, legacy PCI devices sometimes require DMA-memory to be in the low 32 bits. To make this work, we enable the software-based bounce buffers from swiotlb. They only impose overhead when the device in question cannot address the full 64-bit address space, so a perfect fit. This patch assumes that DMA is coherent with the processor and the PCI bus. It also assumes that the processor and devices share a common address space. This is true for all RISC-V platforms so far. [changelog stolen from an earlier patch by Palmer Dabbelt that did the more complicated swiotlb wireup before the recent consolidation] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Palmer Dabbelt <palmer@sifive.com>		2018-05-19 08:46:26 +02:00
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vdso	RISC-V: build vdso-dummy.o with -no-pie	2018-04-24 10:54:46 -07:00
.gitignore	RISC-V: Build Infrastructure	2017-09-26 15:26:49 -07:00
asm-offsets.c	RISC-V: Task implementation	2017-09-26 15:26:46 -07:00
cacheinfo.c
cpu.c
cpufeature.c	RISC-V: User-facing API	2017-09-26 15:26:48 -07:00
entry.S	RISC-V: Move to the new GENERIC_IRQ_MULTI_HANDLER handler	2018-03-14 21:46:29 +01:00
ftrace.c	riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support	2018-04-02 19:59:13 -07:00
head.S	Rename sbi_save to parse_dtb to improve code readability	2018-02-20 10:56:26 -08:00
irq.c	RISC-V: Move to the new GENERIC_IRQ_MULTI_HANDLER handler	2018-03-14 21:46:29 +01:00
Makefile	RISC-V: Fixes to module loading	2018-04-02 20:43:14 -07:00
mcount-dyn.S	riscv/ftrace: Add DYNAMIC_FTRACE_WITH_REGS support	2018-04-02 19:59:13 -07:00
mcount.S	riscv/ftrace: Add dynamic function tracer support	2018-04-02 19:59:12 -07:00
module-sections.c	RISC-V: Add section of GOT.PLT for kernel module	2018-04-02 20:00:54 -07:00
module.c	RISC-V: Support SUB32 relocation type in kernel module	2018-04-02 20:00:55 -07:00
module.lds	RISC-V: Add section of GOT.PLT for kernel module	2018-04-02 20:00:54 -07:00
process.c	Merge branch 'work.whack-a-mole' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-31 19:18:12 -08:00
ptrace.c	RISC-V: User-facing API	2017-09-26 15:26:48 -07:00
reset.c
riscv_ksyms.c	RISC-V: Export some expected symbols for modules	2017-11-30 10:01:10 -08:00
setup.c	riscv: add swiotlb support	2018-05-19 08:46:26 +02:00
signal.c	RISC-V: User-facing API	2017-09-26 15:26:48 -07:00
smp.c	RISC-V: Fixes for clean allmodconfig build	2017-12-01 13:31:31 -08:00
smpboot.c
stacktrace.c	riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support	2018-04-02 19:59:13 -07:00
sys_riscv.c	mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()	2018-04-02 20:16:11 +02:00
syscall_table.c	RISC-V: Make __NR_riscv_flush_icache visible to userspace	2018-01-07 15:14:37 -08:00
time.c
traps.c
vdso.c	riscv: remove redundant unlikely()	2018-01-30 19:12:06 -08:00
vmlinux.lds.S	RISC-V: Build Infrastructure	2017-09-26 15:26:49 -07:00