Add VT-x features to dmesg.

[jhb]

Summary

• Output a summary of optional VT-x features in dmesg similar to CPU features. If bootverbose is enabled, a detailed list is provided; otherwise, a single-line summary is displayed.
• Add read-only sysctls for optional VT-x capabilities used by bhyve under a new hw.vmm.vmx.cap node. Move a few exiting sysctls that indicate the presence of optional capabilities under this node.

Test Plan

Booted my laptop with both verbose and non-verbose kernels with VT-x
both enabled and disabled in my BIOS. Will attach sample output in
follow-up comments.

[jhb]

Short (default) output with VT-x enabled:

CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (2491.96-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x206a7  Family=0x6  Model=0x2a  Stepping=7
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x1fbae3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
  TSC: P-state invariant, performance statistics

Short output with VT-x disabled:

CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (2491.96-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x206a7  Family=0x6  Model=0x2a  Stepping=7
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x1fbae3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  VT-x: (disabled in BIOS) PAT,HLT,MTF,PAUSE,EPT,UG,VPID
  TSC: P-state invariant, performance statistics

Verbose output with VT-x enabled:

CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (2491.96-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x206a7  Family=0x6  Model=0x2a  Stepping=7
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x1fbae3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  VT-x: Basic Features=0xda0400<SMM,INS/OUTS,TRUE>
        Pin-Based Controls=0x7f<ExtINT,NMI,VNMI,PreTmr>
        Primary Processor Controls=0xfff9fffe<INTWIN,TSCOff,HLT,INVLPG,MWAIT,RDPMC,RDTSC,CR3-LD,CR3-ST,CR8-LD,CR8-ST,TPR,NMIWIN,MOV-DR,IO,IOmap,MTF,MSRmap,MONITOR,PAUSE>
        Secondary Processor Controls=0xff<APIC,EPT,DT,RDTSCP,x2APIC,VPID,WBINVD,UG>
        Exit Controls=0xda0400<PAT-LD,EFER-SV,PTMR-SV>
        Entry Controls=0xda0400
        EPT Features=0x6114141<XO,PW4,UC,WB,2M,INVEPT,single,all>
        VPID Features=0xf01<INVVPID,individual,single,all,single-globals>
  TSC: P-state invariant, performance statistics

Verbose with VT-x disabled:

CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (2491.97-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x206a7  Family=0x6  Model=0x2a  Stepping=7
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x1fbae3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  VT-x: (disabled in BIOS) Basic Features=0xda0400<SMM,INS/OUTS,TRUE>
        Pin-Based Controls=0x7f<ExtINT,NMI,VNMI,PreTmr>
        Primary Processor Controls=0xfff9fffe<INTWIN,TSCOff,HLT,INVLPG,MWAIT,RDPMC,RDTSC,CR3-LD,CR3-ST,CR8-LD,CR8-ST,TPR,NMIWIN,MOV-DR,IO,IOmap,MTF,MSRmap,MONITOR,PAUSE>
        Secondary Processor Controls=0xff<APIC,EPT,DT,RDTSCP,x2APIC,VPID,WBINVD,UG>
        Exit Controls=0xda0400<PAT-LD,EFER-SV,PTMR-SV>
        Entry Controls=0xda0400
        EPT Features=0x6114141<XO,PW4,UC,WB,2M,INVEPT,single,all>
        VPID Features=0xf01<INVVPID,individual,single,all,single-globals>
  TSC: P-state invariant, performance statistics

New hw.vmm sysctl tree layout:

hw.vmm.halt_detection: 1
hw.vmm.ipinum: 254
hw.vmm.destroy: beavis
hw.vmm.create: beavis
hw.vmm.iommu.initialized: 0
hw.vmm.ppt.devices: 0
hw.vmm.ept.pmap_flags: 2046
hw.vmm.vmx.cr0_ones_mask: 32
hw.vmm.vmx.cr0_zeros_mask: 18446744071025197056
hw.vmm.vmx.cr4_ones_mask: 8192
hw.vmm.vmx.cr4_zeros_mask: 18446744073709131776
hw.vmm.vmx.initialized: 1
hw.vmm.vmx.cap.patmsr: 1
hw.vmm.vmx.cap.halt_exit: 1
hw.vmm.vmx.cap.pause_exit: 1
hw.vmm.vmx.cap.unrestricted_guest: 1
hw.vmm.vmx.cap.monitor_trap: 1
hw.vmm.vmx.cap.invpcid: 0
hw.vmm.vmx.cap.virtual_interrupt_delivery: 0
hw.vmm.vmx.cap.posted_interrupts: 0
hw.vmm.vmx.posted_interrupt_vector: 0
hw.vmm.vmx.vpid_alloc_failed: 0

[neel]

Looks good.

[grehan]

Excellent, please commit !