redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

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

There are some VFIO regions which are cacheable (QMAN CENA region).
These regions should be mapped cacheable.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Diana Craciun 2019-11-18 16:32:08 +02:00
parent 6f5a90ce35
commit 9e93d71a3e
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/vfio/fsl-mc/vfio_fsl_mc.c
View File

@ -106,6 +106,7 @@ static int vfio_fsl_mc_regions_init(struct vfio_fsl_mc_device *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;
}
vdev->num_regions = mc_dev->obj_desc.region_count;
@ -451,7 +452,12 @@ static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
if (region.size < PAGE_SIZE || base + size > region.size)
return -EINVAL;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (region.type & DPRC_REGION_CACHEABLE) {
if (!(region.type & DPRC_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;
return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,