Re: [Xen-devel] x86/AMD: Nested hvm crashes in 4.3

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 28.06.13 at 02:44, Suravee Suthikulanit <suravee.suthikulpanit@xxxxxxx> 
>>> wrote:
> So, I have finally able to get the crash dump (see below). The crash is due 
> to an assert
> 
>      (XEN) Assertion 'va >= XEN_VIRT_START' failed at 
> /sandbox/xen/xen.git/xen/include/asm/x86_64/page.h:86
> 
> * Debugging show the va=ffff82c40002d000, XEN_VIRT_START=ffff82c4c0000000, 
> DIRECTMAP_VIRT_END=ffffff8000000000.
> * Backtrace symbol showing the crash is in "svm_vmexit_handler()", which is 
> inlined from "svm_vmexit_do_vmsave()" and "svm_vmsave()".

Which helps in no way identifying where the problem is -
svm_vmexit_handler() is just too large to spot this without either
the matching xen-syms at hand, or you adding further
instrumentation.

Jan


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