drm/i915/gvt: adjust high memory size for default vGPU type

Previous high mem size initialized for vGPU type was too small which caused
failure for some VMs. This trys to take minimal value of 384MB for each VM and
enlarge default high mem size to make guest driver happy.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 536d2b9d577732f57a1775f54bdb4a7bce8a7e39..398abb98dd0a85aca4067a24db75206128ae60f3 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -177,7 +177,7 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
                if (low_avail / min_low == 0)
                        break;
                gvt->types[i].low_gm_size = min_low;
-               gvt->types[i].high_gm_size = 3 * gvt->types[i].low_gm_size;
+               gvt->types[i].high_gm_size = max((min_low<<3), MB_TO_BYTES(384U));
                gvt->types[i].fence = 4;
                gvt->types[i].max_instance = low_avail / min_low;
                gvt->types[i].avail_instance = gvt->types[i].max_instance;
@@ -217,7 +217,7 @@ static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
         */
        low_gm_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE -
                gvt->gm.vgpu_allocated_low_gm_size;
-       high_gm_avail = MB_TO_BYTES(256) * 3 - HOST_HIGH_GM_SIZE -
+       high_gm_avail = MB_TO_BYTES(256) * 8UL - HOST_HIGH_GM_SIZE -
                gvt->gm.vgpu_allocated_high_gm_size;
        fence_avail = gvt_fence_sz(gvt) - HOST_FENCE -
                gvt->fence.vgpu_allocated_fence_num;