Re: [Xen-devel] dom0 USB failing with "ehci-pci: probe of 0000:00:1d.0 faile

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.05.14 at 19:19, <mike@xxxxxxxxx> wrote:
> "Jan Beulich" <JBeulich@xxxxxxxx> writes:
> #Okay, this at least clarifies there is a (relatively big) RMRR. There is
> #a change to the handling of these among the ones that'll become
> #4.3.3 - mind giving
> #http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=6c63041428cc348bcb2 
> 887afabd606bc4bd5523f
> #a try on top of your 4.3.2 (or trying the tip of the stable-4.3 branch)?
> #
> #> What else did I miss that could be useful info?
> #
> #At least the resolution of these addresses
> #
> #(XEN) traps.c:3061: GPF (0000): ffff82c4c0186a91 -> ffff82c4c0218daa
> #(XEN) traps.c:3061: GPF (0000): ffff82c4c0186a91 -> ffff82c4c0218daa
> #
> #into (symbol,offset) pairs, so we can at least make a first guess at
> #whether these are in any way related to your problem.
> 
> Booted into xen compiled with xen-syms.
> Hope this is right.  :)
> 
> root@xen-3:~# xl dmesg |grep trap |grep GPF
> (XEN) traps.c:3061: GPF (0000): ffff82c4c0186ae1 -> ffff82c4c0218e3a
> (XEN) traps.c:3061: GPF (0000): ffff82c4c0186ae1 -> ffff82c4c0218e3a
> root@xen-3:~# gdb xen-4.3.0/xen/xen-syms
> GNU gdb (GDB) 7.6.2 (Debian 7.6.2-1.1)
> Copyright (C) 2013 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /root/xen-4.3.0/xen/xen-syms...done.
> (gdb) list *0xffff82c4c0186ae1
> 0xffff82c4c0186ae1 is in do_general_protection (traps.c:2597).
> 2592            case MSR_EFER:
> 2593     rdmsr_normal:
> 2594                /* Everyone can read the MSR space. */
> 2595                /* gdprintk(XENLOG_WARNING,"Domain attempted RDMSR 
> %p.\n",
> 2596                            _p(regs->ecx));*/
> 2597                if ( rdmsr_safe(regs->ecx, msr_content) )
> 2598                    goto fail;
> 2599                regs->eax = (uint32_t)msr_content;
> 2600                regs->edx = (uint32_t)(msr_content >> 32);
> 2601                break;

Thanks. We can then pretty much rule out a connection of these
with the issue at hand.

> I am a noob when working with source code. How do I bump my xen up to 4.3.3?

I guess this
http://wiki.xenproject.org/wiki/Compiling_Xen_From_Source
should help you.

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel