summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/gvt/kvmgt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/kvmgt.c')
-rw-r--r--drivers/gpu/drm/i915/gvt/kvmgt.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 144301b778df..23aa3e50cbf8 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1911,6 +1911,18 @@ static int kvmgt_dma_map_guest_page(unsigned long handle, unsigned long gfn,
ret = __gvt_cache_add(info->vgpu, gfn, *dma_addr, size);
if (ret)
goto err_unmap;
+ } else if (entry->size != size) {
+ /* the same gfn with different size: unmap and re-map */
+ gvt_dma_unmap_page(vgpu, gfn, entry->dma_addr, entry->size);
+ __gvt_cache_remove_entry(vgpu, entry);
+
+ ret = gvt_dma_map_page(vgpu, gfn, dma_addr, size);
+ if (ret)
+ goto err_unlock;
+
+ ret = __gvt_cache_add(info->vgpu, gfn, *dma_addr, size);
+ if (ret)
+ goto err_unmap;
} else {
kref_get(&entry->ref);
*dma_addr = entry->dma_addr;