On 23/05/16 02:37, Shunqian Zheng wrote:
From: Simon <x...@rock-chips.com>Signed-off-by: Simon <x...@rock-chips.com> --- drivers/iommu/rockchip-iommu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 043d18c..1741b65 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -95,12 +95,16 @@ struct rk_iommu { static inline void rk_table_flush(u32 *va, unsigned int count) { +#if defined(CONFIG_ARM) phys_addr_t pa_start = virt_to_phys(va); phys_addr_t pa_end = virt_to_phys(va + count); size_t size = pa_end - pa_start; __cpuc_flush_dcache_area(va, size); outer_flush_range(pa_start, pa_end); +#elif defined(CONFIG_ARM64) + __dma_flush_range(va, va + count); +#endif
Ugh, please don't use arch-private cache maintenance functions directly from a driver. Allocating/mapping page tables to be read by the IOMMU is still DMA, so using the DMA APIs is the correct way to manage them, *especially* if it needs to work across multiple architectures.
Robin.
} static struct rk_iommu_domain *to_rk_domain(struct iommu_domain *dom)
