diff options
Diffstat (limited to 'include/linux/dma-mapping.h')
| -rw-r--r-- | include/linux/dma-mapping.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 99ef042ecdb4..a3e880649fa4 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -9,7 +9,7 @@ #include <linux/bug.h> #include <linux/cache.h> -/** +/* * List of possible attributes associated with a DMA mapping. The semantics * of each attribute should be defined in Documentation/core-api/dma-attributes.rst. */ @@ -92,6 +92,24 @@ * flushing. */ #define DMA_ATTR_REQUIRE_COHERENT (1UL << 12) +/* + * DMA_ATTR_CC_SHARED: Indicates the DMA mapping is shared (decrypted) for + * confidential computing guests. For normal system memory the caller must have + * called set_memory_decrypted(), and pgprot_decrypted must be used when + * creating CPU PTEs for the mapping. The same shared semantic may be passed + * to the vIOMMU when it sets up the IOPTE. For MMIO use together with + * DMA_ATTR_MMIO to indicate shared MMIO. Unless DMA_ATTR_MMIO is provided + * a struct page is required. + */ +#define DMA_ATTR_CC_SHARED (1UL << 13) + +/* + * __DMA_ATTR_ALLOC_CC_SHARED: Internal DMA-mapping attribute used by + * allocation paths that create shared (decrypted) backing pages for + * confidential computing guests. Drivers must not pass this attribute to + * dma_alloc_attrs(). + */ +#define __DMA_ATTR_ALLOC_CC_SHARED (1UL << 14) /* * A dma_addr_t can hold any valid DMA or bus address for the platform. It can @@ -419,7 +437,7 @@ bool __dma_need_sync(struct device *dev, dma_addr_t dma_addr); static inline bool dma_dev_need_sync(const struct device *dev) { /* Always call DMA sync operations when debugging is enabled */ - return !dev->dma_skip_sync || IS_ENABLED(CONFIG_DMA_API_DEBUG); + return !dev_dma_skip_sync(dev) || IS_ENABLED(CONFIG_DMA_API_DEBUG); } static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, |