diff options
Diffstat (limited to 'sys/dev/hyperv/vmbus/hv_hv.c')
| -rw-r--r-- | sys/dev/hyperv/vmbus/hv_hv.c | 168 |
1 files changed, 117 insertions, 51 deletions
diff --git a/sys/dev/hyperv/vmbus/hv_hv.c b/sys/dev/hyperv/vmbus/hv_hv.c index a87b5ce..b835a34 100644 --- a/sys/dev/hyperv/vmbus/hv_hv.c +++ b/sys/dev/hyperv/vmbus/hv_hv.c @@ -33,10 +33,10 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> +#include <sys/kernel.h> #include <sys/malloc.h> #include <sys/pcpu.h> #include <sys/timetc.h> -#include <sys/kernel.h> #include <machine/bus.h> #include <machine/md_var.h> #include <vm/vm.h> @@ -48,9 +48,16 @@ __FBSDID("$FreeBSD$"); #define HV_NANOSECONDS_PER_SEC 1000000000L +#define HYPERV_INTERFACE 0x31237648 /* HV#1 */ static u_int hv_get_timecount(struct timecounter *tc); +u_int hyperv_features; +u_int hyperv_recommends; + +static u_int hyperv_pm_features; +static u_int hyperv_features3; + /** * Globals */ @@ -71,47 +78,6 @@ hv_get_timecount(struct timecounter *tc) } /** - * @brief Query the cpuid for presence of windows hypervisor - */ -int -hv_vmbus_query_hypervisor_presence(void) -{ - if (vm_guest != VM_GUEST_HV) - return (0); - - return (hv_high >= HV_X64_CPUID_MIN && hv_high <= HV_X64_CPUID_MAX); -} - -/** - * @brief Get version of the windows hypervisor - */ -static int -hv_vmbus_get_hypervisor_version(void) -{ - u_int regs[4]; - unsigned int maxLeaf; - unsigned int op; - - /* - * Its assumed that this is called after confirming that - * Viridian is present - * Query id and revision. - */ - op = HV_CPU_ID_FUNCTION_HV_VENDOR_AND_MAX_FUNCTION; - do_cpuid(op, regs); - - maxLeaf = regs[0]; - op = HV_CPU_ID_FUNCTION_HV_INTERFACE; - do_cpuid(op, regs); - - if (maxLeaf >= HV_CPU_ID_FUNCTION_MS_HV_VERSION) { - op = HV_CPU_ID_FUNCTION_MS_HV_VERSION; - do_cpuid(op, regs); - } - return (maxLeaf); -} - -/** * @brief Invoke the specified hypercall */ static uint64_t @@ -160,7 +126,6 @@ hv_vmbus_do_hypercall(uint64_t control, void* input, void* output) int hv_vmbus_init(void) { - int max_leaf; hv_vmbus_x64_msr_hypercall_contents hypercall_msr; void* virt_addr = 0; @@ -177,8 +142,6 @@ hv_vmbus_init(void) if (vm_guest != VM_GUEST_HV) goto cleanup; - max_leaf = hv_vmbus_get_hypervisor_version(); - /* * Write our OS info */ @@ -436,14 +399,117 @@ void hv_vmbus_synic_cleanup(void *arg) wrmsr(HV_X64_MSR_SIEFP, siefp.as_uint64_t); } -static void -hv_tc_init(void) +static bool +hyperv_identify(void) { + u_int regs[4]; + unsigned int maxLeaf; + unsigned int op; + if (vm_guest != VM_GUEST_HV) - return; + return (false); + + op = HV_CPU_ID_FUNCTION_HV_VENDOR_AND_MAX_FUNCTION; + do_cpuid(op, regs); + maxLeaf = regs[0]; + if (maxLeaf < HV_CPU_ID_FUNCTION_MS_HV_IMPLEMENTATION_LIMITS) + return (false); + + op = HV_CPU_ID_FUNCTION_HV_INTERFACE; + do_cpuid(op, regs); + if (regs[0] != HYPERV_INTERFACE) + return (false); - /* register virtual timecounter */ - tc_init(&hv_timecounter); + op = HV_CPU_ID_FUNCTION_MS_HV_FEATURES; + do_cpuid(op, regs); + if ((regs[0] & HV_FEATURE_MSR_HYPERCALL) == 0) { + /* + * Hyper-V w/o Hypercall is impossible; someone + * is faking Hyper-V. + */ + return (false); + } + hyperv_features = regs[0]; + hyperv_pm_features = regs[2]; + hyperv_features3 = regs[3]; + + op = HV_CPU_ID_FUNCTION_MS_HV_VERSION; + do_cpuid(op, regs); + printf("Hyper-V Version: %d.%d.%d [SP%d]\n", + regs[1] >> 16, regs[1] & 0xffff, regs[0], regs[2]); + + printf(" Features=0x%b\n", hyperv_features, + "\020" + "\001VPRUNTIME" /* MSR_VP_RUNTIME */ + "\002TMREFCNT" /* MSR_TIME_REF_COUNT */ + "\003SYNIC" /* MSRs for SynIC */ + "\004SYNTM" /* MSRs for SynTimer */ + "\005APIC" /* MSR_{EOI,ICR,TPR} */ + "\006HYPERCALL" /* MSR_{GUEST_OS_ID,HYPERCALL} */ + "\007VPINDEX" /* MSR_VP_INDEX */ + "\010RESET" /* MSR_RESET */ + "\011STATS" /* MSR_STATS_ */ + "\012REFTSC" /* MSR_REFERENCE_TSC */ + "\013IDLE" /* MSR_GUEST_IDLE */ + "\014TMFREQ" /* MSR_{TSC,APIC}_FREQUENCY */ + "\015DEBUG"); /* MSR_SYNTH_DEBUG_ */ + printf(" PM Features=max C%u, 0x%b\n", + HV_PM_FEATURE_CSTATE(hyperv_pm_features), + (hyperv_pm_features & ~HV_PM_FEATURE_CSTATE_MASK), + "\020" + "\005C3HPET"); /* HPET is required for C3 state */ + printf(" Features3=0x%b\n", hyperv_features3, + "\020" + "\001MWAIT" /* MWAIT */ + "\002DEBUG" /* guest debug support */ + "\003PERFMON" /* performance monitor */ + "\004PCPUDPE" /* physical CPU dynamic partition event */ + "\005XMMHC" /* hypercall input through XMM regs */ + "\006IDLE" /* guest idle support */ + "\007SLEEP" /* hypervisor sleep support */ + "\010NUMA" /* NUMA distance query support */ + "\011TMFREQ" /* timer frequency query (TSC, LAPIC) */ + "\012SYNCMC" /* inject synthetic machine checks */ + "\013CRASH" /* MSRs for guest crash */ + "\014DEBUGMSR" /* MSRs for guest debug */ + "\015NPIEP" /* NPIEP */ + "\016HVDIS"); /* disabling hypervisor */ + + op = HV_CPU_ID_FUNCTION_MS_HV_ENLIGHTENMENT_INFORMATION; + do_cpuid(op, regs); + hyperv_recommends = regs[0]; + if (bootverbose) + printf(" Recommends: %08x %08x\n", regs[0], regs[1]); + + op = HV_CPU_ID_FUNCTION_MS_HV_IMPLEMENTATION_LIMITS; + do_cpuid(op, regs); + if (bootverbose) { + printf(" Limits: Vcpu:%d Lcpu:%d Int:%d\n", + regs[0], regs[1], regs[2]); + } + + if (maxLeaf >= HV_CPU_ID_FUNCTION_MS_HV_HARDWARE_FEATURE) { + op = HV_CPU_ID_FUNCTION_MS_HV_HARDWARE_FEATURE; + do_cpuid(op, regs); + if (bootverbose) { + printf(" HW Features: %08x AMD: %08x\n", + regs[0], regs[3]); + } + } + + return (true); } -SYSINIT(hv_tc_init, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, hv_tc_init, NULL); +static void +hyperv_init(void *dummy __unused) +{ + if (!hyperv_identify()) + return; + + if (hyperv_features & HV_FEATURE_MSR_TIME_REFCNT) { + /* Register virtual timecount */ + tc_init(&hv_timecounter); + } +} +SYSINIT(hyperv_initialize, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, hyperv_init, + NULL); 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