The vmwgfx kernel module has a compatibility mode for user-space that is
not guest-backed resource aware. Add an environment variable to facilitate
testing of this mode on guest-backed aware kernels: if the environment
variable SVGA_FORCE_HOST_BACKED is defined, the driver will use host-backed
operation.
Signed-off-by: Thomas Hellstrom <thellst...@vmware.com>
Reviewed-by: Deepak Rawat <dra...@vmware.com>
---
src/gallium/winsys/svga/drm/vmw_screen_ioctl.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
b/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
index 0ec8c1abe11..cdfe284c4c8 100644
--- a/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
+++ b/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
@@ -967,6 +967,7 @@ vmw_ioctl_init(struct vmw_winsys_screen *vws)
drmVersionPtr version;
boolean drm_gb_capable;
boolean have_drm_2_5;
+ const char *getenv_val;
VMW_FUNC;
@@ -1006,17 +1007,21 @@ vmw_ioctl_init(struct vmw_winsys_screen *vws)
goto out_no_3d;
}
vws->ioctl.hwversion = gp_arg.value;
-
- memset(&gp_arg, 0, sizeof(gp_arg));
- gp_arg.param = DRM_VMW_PARAM_HW_CAPS;
- ret = drmCommandWriteRead(vws->ioctl.drm_fd, DRM_VMW_GET_PARAM,
- &gp_arg, sizeof(gp_arg));
+ getenv_val = getenv("SVGA_FORCE_HOST_BACKED");
+ if (!getenv_val || strcmp(getenv_val, "0") == 0) {
+ memset(&gp_arg, 0, sizeof(gp_arg));
+ gp_arg.param = DRM_VMW_PARAM_HW_CAPS;
+ ret = drmCommandWriteRead(vws->ioctl.drm_fd, DRM_VMW_GET_PARAM,
+ &gp_arg, sizeof(gp_arg));
+ } else {
+ ret = -EINVAL;
+ }
if (ret)
vws->base.have_gb_objects = FALSE;
else
vws->base.have_gb_objects =
!!(gp_arg.value & (uint64_t) SVGA_CAP_GBOBJECTS);
-
+
if (vws->base.have_gb_objects && !drm_gb_capable)
goto out_no_3d;
--
2.20.1
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
