diff options
Diffstat (limited to 'sys/dev/hyperv/vmbus/hyperv.c')
| -rw-r--r-- | sys/dev/hyperv/vmbus/hyperv.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sys/dev/hyperv/vmbus/hyperv.c b/sys/dev/hyperv/vmbus/hyperv.c index 2df313b..144bff5 100644 --- a/sys/dev/hyperv/vmbus/hyperv.c +++ b/sys/dev/hyperv/vmbus/hyperv.c @@ -77,6 +77,8 @@ u_int hyperv_recommends; static u_int hyperv_pm_features; static u_int hyperv_features3; +hyperv_tc64_t hyperv_tc64; + static struct timecounter hyperv_timecounter = { .tc_get_timecount = hyperv_get_timecount, .tc_poll_pps = NULL, @@ -96,6 +98,13 @@ hyperv_get_timecount(struct timecounter *tc __unused) return rdmsr(MSR_HV_TIME_REF_COUNT); } +static uint64_t +hyperv_tc64_rdmsr(void) +{ + + return (rdmsr(MSR_HV_TIME_REF_COUNT)); +} + uint64_t hypercall_post_message(bus_addr_t msg_paddr) { @@ -232,6 +241,12 @@ hyperv_init(void *dummy __unused) if (hyperv_features & CPUID_HV_MSR_TIME_REFCNT) { /* Register Hyper-V timecounter */ tc_init(&hyperv_timecounter); + + /* + * Install 64 bits timecounter method for other modules + * to use. + */ + hyperv_tc64 = hyperv_tc64_rdmsr; } } SYSINIT(hyperv_initialize, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, hyperv_init, |
