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Date:      Thu, 11 Apr 2024 23:08:51 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 278318] bhyve fails to boot OpenBSD unless -w is specified
Message-ID:  <bug-278318-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D278318

            Bug ID: 278318
           Summary: bhyve fails to boot OpenBSD unless -w is specified
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: markj@FreeBSD.org

If I boot OpenBSD 7.5 or 7.4 in bhyve, -w (ignore unknown MSRs) is needed to
avoid a guest panic:

=3D=3D=3D
cpu0 at mainbus0: apid 0 (boot processor)=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20
cpu0: AMD Ryzen 9 7950X3D 16-Core Processor, 4200.65 MHz, 19-61-02=20=20=20=
=20=20=20=20=20=20=20=20=20=20
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFL=
USH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,P=
OPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,MMXX,FFXSR,PAGE1GB,LONG,LAHF,CMPLEG,=
EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,SKINIT,TCE,TOPEXT,DBKP,ITSC,FSGSBASE,B=
MI1,AVX2,SME
P,BMI2,ERMS,AVX512F,AVX512DQ,RDSEED,SMAP,AVX512CD,SHA,AVX512BW,AVX512VL,XSA=
VEOPT=20
cpu0: 0KB 64b/line 1-way D-cache, 0KB 64b/line 1-way L2 cache, 0KB 64b/line
1-way L3 cache=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
wrmsr to register 0xc0011029(0x3) on vcpu 0=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20
                                           fatal protection fault in superv=
isor
mode=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20
trap type 4 code 0 rip ffffffff8122572e cs 8 rflags 10206 cr2 0 cpl e rsp
ffffffff81a069d0=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
gsbase 0xffffffff81908ff0  kgsbase 0x0=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
panic: trap type 4, code=3D0, pc=3Dffffffff8122572e=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20

The operating system has halted.=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20
Please press any key to reboot.
=3D=3D=3D

0xc0011029 is MSR_DE_CFG, and I suspect that OpenBSD's applying a mitigation
for zenbleed.  FreeBSD doesn't do this if it detects that it's running as a
guest.

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