Panic on boot with r351461 (AMD ThreadRipper 2990WX)

[Konstantin Belousov]

On Sat, Aug 24, 2019 at 02:22:18PM -0600, Rebecca Cran wrote:
> I updated my kernel to r351461 today and now get a panic on boot.
> 
> 
> CPU: AMD Ryzen Threadripper 2990WX 32-Core Processor (2994.45-MHz
> K8-class CPU)
>   Origin="AuthenticAMD"  Id=0x800f82  Family=0x17  Model=0x8  Stepping=2
>  
> 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=0x35c233ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,SKINIT,WDT,TCE,Topology,PCXC,PNXC,DBE,PL2I,MWAITX>
>   Structured Extended
> Features=0x209c01a9<FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA>
>   XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
>   AMD Extended Feature Extensions ID
> EBX=0x1007<CLZERO,IRPerf,XSaveErPtr,IBPB>
>   SVM: NP,NRIP,VClean,AFlush,DAssist,NAsids=32768
>   TSC: P-state invariant, performance statistics
> real memory  = 137438953472 (131072 MB)
> avail memory = 133711564800 (127517 MB)
> Event timer "LAPIC" quality 600
> ACPI APIC Table: <AMD A M I >
> 
> Fatal trap 12: page fault while in kernel mode
> 
> cpuid = 0; apic id = 00
> 
> fault virtual address   = 0x30
> 
> fault code  = supervisor read data, page not present
> 
> instruction pointer = 0x20: 0xffffffff811bc664
So what is the source line for this address ?

> 
> stack pointer = 0x28:0xffffffff8441faa0
> 
> frame pointer = 0x28:0xffffffff8441fae0
> 
> code segment = base 0x0, limit 0xfffff, type 0x1b
> 
>   = DPL 0, pres 1, long 1, def32 0, gran 1
> 
> processor eflags = resume, IOPL = 0
> 
> current process = 0 ()
> 
> tral number = 12
> 
> panic: page fault
> 
> cpuid = 0
> 
> time = 1
> 
> KDB: stack backtrace:
> 
> db_trace_self_wrapper()
> 
> ...
> 
> --- trap 0xc, rip = 0xffffffff811bc664, rsp = 0xffffffff8441faa0, rbp =
> 0xffffffff8441fae0 ---
> 
> native_start_all_aps()
> 
> cpu_mp_start()
> 
> mp_start()
> 
> mi_startup()
> 
> 
> -- 
> Rebecca Cran
> 
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