[Bug 260148] passthru stopped working

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 260148] passthru stopped working"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 19 Jun 2022 17:14:45 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260148

--- Comment #15 from John Nielsen <john@jnielsen.net> ---
I just updated from 13-STABLE to 14-CURRENT yesterday and PCI passthru
including rebooting the VM is working as expected. I'm also not seeing the
"vm_open.. could not be opened" error. (I think the latter is fixed by
https://cgit.freebsd.org/src/commit/?id=7a0c23da4eaa63f00e53aa18f3ab1f2bb32f593a
.)

For context, I'm on an AMD machine. Partial dmesg output:
CPU: AMD Ryzen 5 3600X 6-Core Processor              (3792.99-MHz K8-class CPU)
  Origin="AuthenticAMD"  Id=0x870f10  Family=0x17  Model=0x71  Stepping=0
 
Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
 
Features2=0x7ed8320b<SSE3,PCLMULQDQ,MON,SSSE3,FMA,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
  AMD Features=0x2e500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM>
  AMD
Features2=0x75c237ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,SKINIT,WDT,TCE,Topology,PCXC,PNXC,DBE,PL2I,MWAITX,ADMSKX>
  Structured Extended
Features=0x219c91a9<FSGSBASE,BMI1,AVX2,SMEP,BMI2,PQM,PQE,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,SHA>
  Structured Extended Features2=0x400004<UMIP,RDPID>
  XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
  AMD Extended Feature Extensions ID
EBX=0x108b657<CLZERO,IRPerf,XSaveErPtr,RDPRU,WBNOINVD,IBPB,STIBP,SSBD>
  SVM: NP,NRIP,VClean,AFlush,DAssist,NAsids=32768
  TSC: P-state invariant, performance statistics

AMD-Vi: IVRS Info VAsize = 64 PAsize = 48 GVAsize = 2 flags:0

amdiommu0 at device 0.2 on pci0

ivhd0: <AMD-Vi/IOMMU ivhd with EFR> on acpi0
ivhd0: Flag:b0<IotlbSup,Coherent>
ivhd0: Features(type:0x11) MsiNumPPR = 0 PNBanks= 2 PNCounters= 0
ivhd0: Extended features[31:0]:22294a5a<PPRSup,NXSup,GTSup,IASup,PCSup> HATS =
0x2 GATS = 0x0 GLXSup = 0x1 SmiFSup = 0x1 SmiFRC = 0x2 GAMSup = 0x1
DualPortLogSup = 0x2 DualEventLogSup = 0x2
ivhd0: Extended
features[62:32]:58f77ef<USSup,PprOvrflwEarlySup,PPRAutoRspSup,BlKStopMrkSup,PerfOptSup,MsiCapMmioSup,GIOSup,HASup,EPHSup,AttrFWSup>
Max PASID: 0x2f DevTblSegSup = 0x3 MarcSup = 0x1
ivhd0: supported paging level:7, will use only: 4
ivhd0: device [0x8 - 0xfffe] config:0
ivhd0: device [0xff00 - 0xffff] config:0
ivhd0: PCI cap 0x190b640f@0x40 feature:19<IOTLB,EFR,CapExt>

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