2 files changed, 18 insertions, 0 deletions
diff --git a/lib/drmtest.c b/lib/drmtest.c
index 0f021902..f9b7a6f0 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -57,6 +57,20 @@ is_intel(int fd)
 	return IS_INTEL(devid);
 }
 
+bool gem_uses_aliasing_ppgtt(int fd)
+{
+	struct drm_i915_getparam gp;
+	int val;
+
+	gp.param = 18; /* HAS_ALIASING_PPGTT */
+	gp.value = &val;
+
+	if (ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp)))
+		return 0;
+
+	return val;
+}
+
 /* Ensure the gpu is idle by launching a nop execbuf and stalling for it. */
 void gem_quiescent_gpu(int fd)
 {
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 9f194448..96fbf1ac 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -30,6 +30,7 @@
 #include <unistd.h>
 #include <assert.h>
 #include <errno.h>
+#include <stdbool.h>
 
 #include "xf86drm.h"
 #include "intel_batchbuffer.h"
@@ -53,6 +54,9 @@ uint64_t gem_aperture_size(int fd);
 uint64_t gem_mappable_aperture_size(void);
 int gem_madvise(int fd, uint32_t handle, int state);
 
+/* feature test helpers */
+bool gem_uses_aliasing_ppgtt(int fd);
+
 /* generally useful helpers */
 void drmtest_fork_signal_helper(void);
 void drmtest_stop_signal_helper(void);