Author: sephe Date: Thu Dec 8 05:37:39 2016 New Revision: 309705 URL: https://svnweb.freebsd.org/changeset/base/309705
Log: hyperv/timesync: Support "sent TC" to improve accuracy. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8723 Modified: head/sys/dev/hyperv/include/hyperv.h head/sys/dev/hyperv/utilities/hv_timesync.c head/sys/dev/hyperv/utilities/vmbus_icreg.h head/sys/dev/hyperv/vmbus/hyperv_reg.h head/sys/dev/hyperv/vmbus/hyperv_var.h head/sys/dev/hyperv/vmbus/vmbus_et.c Modified: head/sys/dev/hyperv/include/hyperv.h ============================================================================== --- head/sys/dev/hyperv/include/hyperv.h Thu Dec 8 05:15:00 2016 (r309704) +++ head/sys/dev/hyperv/include/hyperv.h Thu Dec 8 05:37:39 2016 (r309705) @@ -36,6 +36,23 @@ #include <vm/vm.h> #include <vm/pmap.h> +#define MSR_HV_TIME_REF_COUNT 0x40000020 + +#define CPUID_HV_MSR_TIME_REFCNT 0x0002 /* MSR_HV_TIME_REF_COUNT */ +#define CPUID_HV_MSR_SYNIC 0x0004 /* MSRs for SynIC */ +#define CPUID_HV_MSR_SYNTIMER 0x0008 /* MSRs for SynTimer */ +#define CPUID_HV_MSR_APIC 0x0010 /* MSR_HV_{EOI,ICR,TPR} */ +#define CPUID_HV_MSR_HYPERCALL 0x0020 /* MSR_HV_GUEST_OS_ID + * MSR_HV_HYPERCALL */ +#define CPUID_HV_MSR_VP_INDEX 0x0040 /* MSR_HV_VP_INDEX */ +#define CPUID_HV_MSR_GUEST_IDLE 0x0400 /* MSR_HV_GUEST_IDLE */ + +#ifndef NANOSEC +#define NANOSEC 1000000000ULL +#endif +#define HYPERV_TIMER_NS_FACTOR 100ULL +#define HYPERV_TIMER_FREQ (NANOSEC / HYPERV_TIMER_NS_FACTOR) + struct hyperv_guid { uint8_t hv_guid[16]; } __packed; @@ -44,4 +61,6 @@ struct hyperv_guid { int hyperv_guid2str(const struct hyperv_guid *, char *, size_t); +extern u_int hyperv_features; /* CPUID_HV_MSR_ */ + #endif /* _HYPERV_H_ */ Modified: head/sys/dev/hyperv/utilities/hv_timesync.c ============================================================================== --- head/sys/dev/hyperv/utilities/hv_timesync.c Thu Dec 8 05:15:00 2016 (r309704) +++ head/sys/dev/hyperv/utilities/hv_timesync.c Thu Dec 8 05:37:39 2016 (r309705) @@ -46,10 +46,14 @@ __FBSDID("$FreeBSD$"); #define VMBUS_TIMESYNC_FWVER \ VMBUS_IC_VERSION(VMBUS_TIMESYNC_FWVER_MAJOR, 0) -#define VMBUS_TIMESYNC_MSGVER_MAJOR 3 +#define VMBUS_TIMESYNC_MSGVER_MAJOR 4 #define VMBUS_TIMESYNC_MSGVER \ VMBUS_IC_VERSION(VMBUS_TIMESYNC_MSGVER_MAJOR, 0) +#define VMBUS_TIMESYNC_DORTT(sc) \ + ((sc)->ic_msgver >= VMBUS_IC_VERSION(4, 0) && \ + (hyperv_features & CPUID_HV_MSR_TIME_REFCNT)) + static const struct vmbus_ic_desc vmbus_timesync_descs[] = { { .ic_guid = { .hv_guid = { @@ -81,12 +85,16 @@ SYSCTL_INT(_hw_hvtimesync, OID_AUTO, sam &vmbus_ts_sample_verbose, 0, "Increase sample request verbosity."); static void -vmbus_timesync(struct hv_util_sc *sc, uint64_t hvtime, uint8_t tsflags) +vmbus_timesync(struct hv_util_sc *sc, uint64_t hvtime, uint64_t sent_tc, + uint8_t tsflags) { struct timespec vm_ts; - uint64_t hv_ns, vm_ns; + uint64_t hv_ns, vm_ns, rtt = 0; + + if (VMBUS_TIMESYNC_DORTT(sc)) + rtt = rdmsr(MSR_HV_TIME_REF_COUNT) - sent_tc; - hv_ns = (hvtime - VMBUS_ICMSG_TS_BASE) * VMBUS_ICMSG_TS_FACTOR; + hv_ns = (hvtime - VMBUS_ICMSG_TS_BASE + rtt) * HYPERV_TIMER_NS_FACTOR; nanotime(&vm_ts); vm_ns = (vm_ts.tv_sec * NANOSEC) + vm_ts.tv_nsec; @@ -174,6 +182,8 @@ vmbus_timesync_cb(struct vmbus_channel * VMBUS_TIMESYNC_FWVER, VMBUS_TIMESYNC_MSGVER); if (error) return; + if (VMBUS_TIMESYNC_DORTT(sc)) + device_printf(sc->ic_dev, "RTT\n"); break; case VMBUS_ICMSG_TYPE_TIMESYNC: @@ -183,7 +193,8 @@ vmbus_timesync_cb(struct vmbus_channel * return; } msg = data; - vmbus_timesync(sc, msg->ic_hvtime, msg->ic_tsflags); + vmbus_timesync(sc, msg->ic_hvtime, msg->ic_sent_tc, + msg->ic_tsflags); break; default: Modified: head/sys/dev/hyperv/utilities/vmbus_icreg.h ============================================================================== --- head/sys/dev/hyperv/utilities/vmbus_icreg.h Thu Dec 8 05:15:00 2016 (r309704) +++ head/sys/dev/hyperv/utilities/vmbus_icreg.h Thu Dec 8 05:37:39 2016 (r309705) @@ -114,18 +114,13 @@ struct vmbus_icmsg_timesync { struct vmbus_icmsg_hdr ic_hdr; uint64_t ic_hvtime; uint64_t ic_vmtime; - uint64_t ic_rtt; + uint64_t ic_sent_tc; uint8_t ic_tsflags; /* VMBUS_ICMSG_TS_FLAG_ */ } __packed; #define VMBUS_ICMSG_TS_FLAG_SYNC 0x01 #define VMBUS_ICMSG_TS_FLAG_SAMPLE 0x02 -/* XXX consolidate w/ hyperv */ #define VMBUS_ICMSG_TS_BASE 116444736000000000ULL -#define VMBUS_ICMSG_TS_FACTOR 100ULL -#ifndef NANOSEC -#define NANOSEC 1000000000ULL -#endif #endif /* !_VMBUS_ICREG_H_ */ Modified: head/sys/dev/hyperv/vmbus/hyperv_reg.h ============================================================================== --- head/sys/dev/hyperv/vmbus/hyperv_reg.h Thu Dec 8 05:15:00 2016 (r309704) +++ head/sys/dev/hyperv/vmbus/hyperv_reg.h Thu Dec 8 05:37:39 2016 (r309705) @@ -57,8 +57,6 @@ #define MSR_HV_VP_INDEX 0x40000002 -#define MSR_HV_TIME_REF_COUNT 0x40000020 - #define MSR_HV_SCONTROL 0x40000080 #define MSR_HV_SCTRL_ENABLE 0x0001ULL #define MSR_HV_SCTRL_RSVD_MASK 0xfffffffffffffffeULL @@ -106,15 +104,7 @@ #define CPUID_LEAF_HV_IDENTITY 0x40000002 #define CPUID_LEAF_HV_FEATURES 0x40000003 -/* EAX: features */ -#define CPUID_HV_MSR_TIME_REFCNT 0x0002 /* MSR_HV_TIME_REF_COUNT */ -#define CPUID_HV_MSR_SYNIC 0x0004 /* MSRs for SynIC */ -#define CPUID_HV_MSR_SYNTIMER 0x0008 /* MSRs for SynTimer */ -#define CPUID_HV_MSR_APIC 0x0010 /* MSR_HV_{EOI,ICR,TPR} */ -#define CPUID_HV_MSR_HYPERCALL 0x0020 /* MSR_HV_GUEST_OS_ID - * MSR_HV_HYPERCALL */ -#define CPUID_HV_MSR_VP_INDEX 0x0040 /* MSR_HV_VP_INDEX */ -#define CPUID_HV_MSR_GUEST_IDLE 0x0400 /* MSR_HV_GUEST_IDLE */ +/* EAX: features include/hyperv.h CPUID_HV_MSR */ /* ECX: power management features */ #define CPUPM_HV_CSTATE_MASK 0x000f /* deepest C-state */ #define CPUPM_HV_C3_HPET 0x0010 /* C3 requires HPET */ Modified: head/sys/dev/hyperv/vmbus/hyperv_var.h ============================================================================== --- head/sys/dev/hyperv/vmbus/hyperv_var.h Thu Dec 8 05:15:00 2016 (r309704) +++ head/sys/dev/hyperv/vmbus/hyperv_var.h Thu Dec 8 05:37:39 2016 (r309705) @@ -29,13 +29,6 @@ #ifndef _HYPERV_VAR_H_ #define _HYPERV_VAR_H_ -#ifndef NANOSEC -#define NANOSEC 1000000000ULL -#endif -#define HYPERV_TIMER_NS_FACTOR 100ULL -#define HYPERV_TIMER_FREQ (NANOSEC / HYPERV_TIMER_NS_FACTOR) - -extern u_int hyperv_features; extern u_int hyperv_recommends; uint64_t hypercall_post_message(bus_addr_t msg_paddr); Modified: head/sys/dev/hyperv/vmbus/vmbus_et.c ============================================================================== --- head/sys/dev/hyperv/vmbus/vmbus_et.c Thu Dec 8 05:15:00 2016 (r309704) +++ head/sys/dev/hyperv/vmbus/vmbus_et.c Thu Dec 8 05:37:39 2016 (r309705) @@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$"); #include <sys/systm.h> #include <sys/timeet.h> +#include <dev/hyperv/include/hyperv.h> #include <dev/hyperv/vmbus/hyperv_reg.h> #include <dev/hyperv/vmbus/hyperv_var.h> #include <dev/hyperv/vmbus/vmbus_var.h> _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
