diff options
Diffstat (limited to 'sys/dev/hyperv/vmbus/vmbus_et.c')
| -rw-r--r-- | sys/dev/hyperv/vmbus/vmbus_et.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/sys/dev/hyperv/vmbus/vmbus_et.c b/sys/dev/hyperv/vmbus/vmbus_et.c index 1e0c746..93f2ffa 100644 --- a/sys/dev/hyperv/vmbus/vmbus_et.c +++ b/sys/dev/hyperv/vmbus/vmbus_et.c @@ -50,13 +50,10 @@ __FBSDID("$FreeBSD$"); MSR_HV_STIMER_CFG_SINT_MASK) /* - * Two additionally required features: + * Additionally required feature: * - SynIC is needed for interrupt generation. - * - Time reference counter is needed to set ABS reference count to - * STIMER0_COUNT. */ -#define CPUID_HV_ET_MASK (CPUID_HV_MSR_TIME_REFCNT | \ - CPUID_HV_MSR_SYNIC | \ +#define CPUID_HV_ET_MASK (CPUID_HV_MSR_SYNIC | \ CPUID_HV_MSR_SYNTIMER) static void vmbus_et_identify(driver_t *, device_t); @@ -104,7 +101,7 @@ vmbus_et_start(struct eventtimer *et __unused, sbintime_t first, { uint64_t current; - current = rdmsr(MSR_HV_TIME_REF_COUNT); + current = hyperv_tc64(); current += hyperv_sbintime2count(first); wrmsr(MSR_HV_STIMER0_COUNT, current); @@ -133,7 +130,8 @@ vmbus_et_identify(driver_t *driver, device_t parent) { if (device_get_unit(parent) != 0 || device_find_child(parent, VMBUS_ET_NAME, -1) != NULL || - (hyperv_features & CPUID_HV_ET_MASK) != CPUID_HV_ET_MASK) + (hyperv_features & CPUID_HV_ET_MASK) != CPUID_HV_ET_MASK || + hyperv_tc64 == NULL) return; device_add_child(parent, VMBUS_ET_NAME, -1); @@ -189,9 +187,8 @@ vmbus_et_attach(device_t dev) vmbus_et.et_start = vmbus_et_start; /* - * Delay a bit to make sure that MSR_HV_TIME_REF_COUNT will - * not return 0, since writing 0 to STIMER0_COUNT will disable - * STIMER0. + * Delay a bit to make sure that hyperv_tc64 will not return 0, + * since writing 0 to STIMER0_COUNT will disable STIMER0. */ DELAY(100); smp_rendezvous(NULL, vmbus_et_config, NULL, NULL); |
