vfio/fsl-mc: Map the VFIO region according to the flags received from…

… the mc firmware

There are some VFIO regions which are cacheable, non-shareable(e.g.
QMAN CENA region). These regions should be mapped cacheable
non-shareable.

Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>

drivers/vfio/fsl-mc/vfio_fsl_mc.c

@@ -50,6 +50,7 @@ static int vfio_fsl_mc_open_device(struct vfio_device *core_vdev)
 		vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ;
 		if (!(mc_dev->regions[i].flags & IORESOURCE_READONLY))
 			vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_WRITE;
+		vdev->regions[i].type = mc_dev->regions[i].flags & IORESOURCE_BITS;
 	}
 
 	return 0;
@@ -361,7 +362,6 @@ static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
 {
 	u64 size = vma->vm_end - vma->vm_start;
 	u64 pgoff, base;
-	u8 region_cacheable;
 
 	pgoff = vma->vm_pgoff &
 		((1U << (VFIO_FSL_MC_OFFSET_SHIFT - PAGE_SHIFT)) - 1);
@@ -370,9 +370,10 @@ static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
 	if (region.size < PAGE_SIZE || base + size > region.size)
 		return -EINVAL;
 
-	region_cacheable = (region.type & FSL_MC_REGION_CACHEABLE) &&
-			   (region.type & FSL_MC_REGION_SHAREABLE);
-	if (!region_cacheable)
+	if (region.type & FSL_MC_REGION_CACHEABLE) {
+		if (!(region.type & FSL_MC_REGION_SHAREABLE))
+			vma->vm_page_prot = pgprot_cached_ns(vma->vm_page_prot);
+	} else
 		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 
 	vma->vm_pgoff = (region.addr >> PAGE_SHIFT) + pgoff;