| Message ID | 20230104074146.578485-4-uwu@icenowy.me (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Palmer Dabbelt |
| Headers | show |
| Series | Support using physical addresses for RISC-V CMO | expand |
| Context | Check | Description |
|---|---|---|
| conchuod/tree_selection | fail | Failed to apply to next/pending-fixes or riscv/for-next |
diff --git a/arch/riscv/mm/dma-noncoherent.c b/arch/riscv/mm/dma-noncoherent.c index a751f4aece62..0ad0614d1ad4 100644 --- a/arch/riscv/mm/dma-noncoherent.c +++ b/arch/riscv/mm/dma-noncoherent.c @@ -52,8 +52,9 @@ void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size, void arch_dma_prep_coherent(struct page *page, size_t size) { void *flush_addr = page_address(page); + phys_addr_t paddr = PFN_PHYS(page_to_pfn(page)); - ALT_CMO_OP(flush, flush_addr, size, riscv_cbom_block_size); + ALT_CMO_OP_VPA(flush, flush_addr, paddr, size, riscv_cbom_block_size); } void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
When doing DMA page preparation, both the VA and the PA are easily accessible from struct page. Use the alternative macro variant that takes both VA and PA as parameters, thus in case the ISA extension used support PA directly, the overhead for re-converting VA to PA can be omitted. Suggested-by: Guo Ren <guoren@kernel.org> Signed-off-by: Icenowy Zheng <uwu@icenowy.me> --- arch/riscv/mm/dma-noncoherent.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)