[PATCH v1 3/4] vfio: Add VFIO_DMA_MAP_FLAG_SYS_CACHE to control device access to system cache

[Manoj Vishwanathan]

This new flag allows controlling whether a device buffers should be mapped to
sys cache for mapped DMA regions.

Signed-off-by: Manoj Vishwanathan <manojvishy@xxxxxxxxxx>
---
 include/uapi/linux/vfio.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 2b68e6cdf190..494611a046d3 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -1560,6 +1560,7 @@ struct vfio_iommu_type1_dma_map {
 #define VFIO_DMA_MAP_FLAG_READ (1 << 0)		/* readable from device */
 #define VFIO_DMA_MAP_FLAG_WRITE (1 << 1)	/* writable from device */
 #define VFIO_DMA_MAP_FLAG_VADDR (1 << 2)
+#define VFIO_DMA_MAP_FLAG_SYS_CACHE (1 << 6)	/* Sys Cache able from device */
 	__u64	vaddr;				/* Process virtual address */
 	__u64	iova;				/* IO virtual address */
 	__u64	size;				/* Size of mapping (bytes) */
-- 
2.46.0.295.g3b9ea8a38a-goog