Re: Panic on CPU 0: FATAL TRAP: vec 7, #NM[0000]

[Jan Beulich <jbeulich@xxxxxxxx>]

On 20.07.2022 06:48, ChrisD wrote:
> So, you think it's a problem with fc36?

Well, if that's where the binary came from, then yes.

And btw please don't top-post and please don't send html mail
(see the almost unreadable stuff below that was how your mail
came through when read as plain-text).

Jan

> -------- Original message --------From: Andrew Cooper 
> <Andrew.Cooper3@xxxxxxxxxx> Date: 7/18/22  6:25 PM  (GMT-05:00) To: 
> chris@xxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx Cc: Jan Beulich 
> <jbeulich@xxxxxxxx>, Michael Young <m.a.young@xxxxxxxxxxxx> Subject: Re: 
> Panic on CPU 0: FATAL TRAP: vec 7, #NM[0000] On 18/07/2022 22:31, 
> chris@xxxxxxxxxxxx wrote:> I am trying to run Xen-4.16.1-4.fc36 on Fedora 36 
> on a brand new Lenovo> ThinkStation p620, but I keep getting the following 
> error booting the> Xen kernel.> > Panic on CPU 0:> FATAL TRAP: vec 7, 
> #NM[0000]>> Version info:> Name        : xen> Version     : 4.16.1> Release   
>   : 4.fc36So https://koji.fedoraproject.org/koji/buildinfo?buildID=1991182 
> shouldbe the binary build in use, and looking at the debug syms, it 
> reallydoes have:ffff82d040439c80 <amd_iommu_init>:...ffff82d04043a00c:       
> 0f 6e c2                movd   %edx,%mm0ffff82d04043a00f:       0f 62 c0      
>           punpckldq %mm0,%mm0ffff82d04043a012:       49 89 87 c0 00 00 00    
> mov    %rax,0xc0(%r15)ffff82d04043a019:       41 0f 7f 87 d0 00 00    movq   
> %mm0,0xd0(%r15)ffff82d04043a020:       00So hardware is correct - this build 
> of Xen is nonsense.The binary is also full of .annobin_ stuff which appears 
> to be some kindof GCC plugin for watermarking.Michael: Any idea what's going 
> on here?  Something has caused GCC toemit some MMX logic which is ultimately 
> why things exploded, but thisprobably means that some of the build CFLAGS got 
> dropped.Thanks,~Andrew