1 files changed, 18 insertions, 3 deletions

diff --git a/sys/dev/hyperv/vmbus/amd64/hyperv_machdep.c b/sys/dev/hyperv/vmbus/amd64/hyperv_machdep.c
index abf0372bb31e..cb815bb163c5 100644
--- a/sys/dev/hyperv/vmbus/amd64/hyperv_machdep.c
+++ b/sys/dev/hyperv/vmbus/amd64/hyperv_machdep.c
@@ -33,6 +33,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/kernel.h>
 #include <sys/systm.h>
 #include <sys/timetc.h>
+#include <sys/vdso.h>
 
 #include <machine/cpufunc.h>
 #include <machine/cputypes.h>
@@ -52,18 +53,20 @@ struct hyperv_reftsc_ctx {
 	struct hyperv_dma	tsc_ref_dma;
 };
 
+static uint32_t			hyperv_tsc_vdso_timehands(
+				    struct vdso_timehands *,
+				    struct timecounter *);
+
 static d_open_t			hyperv_tsc_open;
 static d_mmap_t			hyperv_tsc_mmap;
 
 static struct timecounter	hyperv_tsc_timecounter = {
 	.tc_get_timecount	= NULL,	/* based on CPU vendor. */
-	.tc_poll_pps		= NULL,
 	.tc_counter_mask	= 0xffffffff,
 	.tc_frequency		= HYPERV_TIMER_FREQ,
 	.tc_name		= "Hyper-V-TSC",
 	.tc_quality		= 3000,
-	.tc_flags		= 0,
-	.tc_priv		= NULL
+	.tc_fill_vdso_timehands = hyperv_tsc_vdso_timehands,
 };
 
 static struct cdevsw		hyperv_tsc_cdevsw = {
@@ -117,6 +120,18 @@ hyperv_tsc_mmap(struct cdev *dev __unused, vm_ooffset_t offset,
 	return (0);
 }
 
+static uint32_t
+hyperv_tsc_vdso_timehands(struct vdso_timehands *vdso_th,
+    struct timecounter *tc __unused)
+{
+
+	vdso_th->th_algo = VDSO_TH_ALGO_X86_HVTSC;
+	vdso_th->th_x86_shift = 0;
+	vdso_th->th_x86_hpet_idx = 0;
+	bzero(vdso_th->th_res, sizeof(vdso_th->th_res));
+	return (1);
+}
+
 #define HYPERV_TSC_TIMECOUNT(fence)					\
 static u_int								\
 hyperv_tsc_timecount_##fence(struct timecounter *tc)			\